May 2023 - Linux-stable-mirror

[PATCH] amdgpu: fix some kernel-doc markup

by Stylon Wang

From: Yann Dirson <ydirson(a)free.fr> commit 03f2abb07e54b3e0da54c52a656d9765b7e141c5 upstream. Those are not today pulled by the sphinx doc, but better be ready. Two lines of the cherry-picked patch is removed because they are being refactored away from this file: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h Signed-off-by: Yann Dirson <ydirson(a)free.fr> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Reported-by: kernel test robot <lkp(a)intel.com> Link: https://lore.kernel.org/oe-kbuild-all/202302281017.9qcgLAZi-lkp@intel.com/ Cc: <stable(a)vger.kernel.org> # 5.15.x (cherry picked from commit 03f2abb07e54b3e0da54c52a656d9765b7e141c5) --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 +++--- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index b0d9c47cc381..a5cf672e79c5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -557,11 +557,11 @@ void amdgpu_device_wreg(struct amdgpu_device *adev, trace_amdgpu_device_wreg(adev->pdev->device, reg, v); } -/* +/** * amdgpu_mm_wreg_mmio_rlc - write register either with mmio or with RLC path if in range * * this function is invoked only the debugfs register access - * */ + */ void amdgpu_mm_wreg_mmio_rlc(struct amdgpu_device *adev, uint32_t reg, uint32_t v) { @@ -1107,7 +1107,7 @@ static void amdgpu_device_wb_fini(struct amdgpu_device *adev) } /** - * amdgpu_device_wb_init- Init Writeback driver info and allocate memory + * amdgpu_device_wb_init - Init Writeback driver info and allocate memory * * @adev: amdgpu_device pointer * diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index fa4f0a205127..81d033b99591 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -622,7 +622,7 @@ static void dm_dcn_vertical_interrupt0_high_irq(void *interrupt_params) #endif /** - * dmub_aux_setconfig_reply_callback - Callback for AUX or SET_CONFIG command. + * dmub_aux_setconfig_callback - Callback for AUX or SET_CONFIG command. * @adev: amdgpu_device pointer * @notify: dmub notification structure * -- 2.40.0

1 year, 8 months

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FAILED: patch "[PATCH] fprobe: add recursion detection in fprobe_exit_handler" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 2752741080f84f9b2fc93fa92735315d10a415bf # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023052253-squabble-matchbook-63eb@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: 2752741080f8 ("fprobe: add recursion detection in fprobe_exit_handler") 76d0de5729c0 ("fprobe: Pass entry_data to handlers") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 2752741080f84f9b2fc93fa92735315d10a415bf Mon Sep 17 00:00:00 2001 From: Ze Gao <zegao2021(a)gmail.com> Date: Wed, 17 May 2023 11:45:08 +0800 Subject: [PATCH] fprobe: add recursion detection in fprobe_exit_handler fprobe_hander and fprobe_kprobe_handler has guarded ftrace recursion detection but fprobe_exit_handler has not, which possibly introduce recursive calls if the fprobe exit callback calls any traceable functions. Checking in fprobe_hander or fprobe_kprobe_handler is not enough and misses this case. So add recursion free guard the same way as fprobe_hander. Since ftrace recursion check does not employ ip(s), so here use entry_ip and entry_parent_ip the same as fprobe_handler. Link: https://lore.kernel.org/all/20230517034510.15639-4-zegao@tencent.com/ Fixes: 5b0ab78998e3 ("fprobe: Add exit_handler support") Signed-off-by: Ze Gao <zegao(a)tencent.com> Cc: stable(a)vger.kernel.org Acked-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> diff --git a/kernel/trace/fprobe.c b/kernel/trace/fprobe.c index 7a692c02f787..18d36842faf5 100644 --- a/kernel/trace/fprobe.c +++ b/kernel/trace/fprobe.c @@ -17,6 +17,7 @@ struct fprobe_rethook_node { struct rethook_node node; unsigned long entry_ip; + unsigned long entry_parent_ip; char data[]; }; @@ -39,6 +40,7 @@ static inline void __fprobe_handler(unsigned long ip, unsigned long parent_ip, } fpr = container_of(rh, struct fprobe_rethook_node, node); fpr->entry_ip = ip; + fpr->entry_parent_ip = parent_ip; if (fp->entry_data_size) entry_data = fpr->data; } @@ -114,14 +116,26 @@ static void fprobe_exit_handler(struct rethook_node *rh, void *data, { struct fprobe *fp = (struct fprobe *)data; struct fprobe_rethook_node *fpr; + int bit; if (!fp || fprobe_disabled(fp)) return; fpr = container_of(rh, struct fprobe_rethook_node, node); + /* + * we need to assure no calls to traceable functions in-between the + * end of fprobe_handler and the beginning of fprobe_exit_handler. + */ + bit = ftrace_test_recursion_trylock(fpr->entry_ip, fpr->entry_parent_ip); + if (bit < 0) { + fp->nmissed++; + return; + } + fp->exit_handler(fp, fpr->entry_ip, regs, fp->entry_data_size ? (void *)fpr->data : NULL); + ftrace_test_recursion_unlock(bit); } NOKPROBE_SYMBOL(fprobe_exit_handler);

1 year, 8 months

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FAILED: patch "[PATCH] fprobe: add recursion detection in fprobe_exit_handler" failed to apply to 6.3-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.3-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.3.y git checkout FETCH_HEAD git cherry-pick -x 2752741080f84f9b2fc93fa92735315d10a415bf # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023052252-tidy-booting-4425@gregkh' --subject-prefix 'PATCH 6.3.y' HEAD^.. Possible dependencies: 2752741080f8 ("fprobe: add recursion detection in fprobe_exit_handler") 76d0de5729c0 ("fprobe: Pass entry_data to handlers") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 2752741080f84f9b2fc93fa92735315d10a415bf Mon Sep 17 00:00:00 2001 From: Ze Gao <zegao2021(a)gmail.com> Date: Wed, 17 May 2023 11:45:08 +0800 Subject: [PATCH] fprobe: add recursion detection in fprobe_exit_handler fprobe_hander and fprobe_kprobe_handler has guarded ftrace recursion detection but fprobe_exit_handler has not, which possibly introduce recursive calls if the fprobe exit callback calls any traceable functions. Checking in fprobe_hander or fprobe_kprobe_handler is not enough and misses this case. So add recursion free guard the same way as fprobe_hander. Since ftrace recursion check does not employ ip(s), so here use entry_ip and entry_parent_ip the same as fprobe_handler. Link: https://lore.kernel.org/all/20230517034510.15639-4-zegao@tencent.com/ Fixes: 5b0ab78998e3 ("fprobe: Add exit_handler support") Signed-off-by: Ze Gao <zegao(a)tencent.com> Cc: stable(a)vger.kernel.org Acked-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> diff --git a/kernel/trace/fprobe.c b/kernel/trace/fprobe.c index 7a692c02f787..18d36842faf5 100644 --- a/kernel/trace/fprobe.c +++ b/kernel/trace/fprobe.c @@ -17,6 +17,7 @@ struct fprobe_rethook_node { struct rethook_node node; unsigned long entry_ip; + unsigned long entry_parent_ip; char data[]; }; @@ -39,6 +40,7 @@ static inline void __fprobe_handler(unsigned long ip, unsigned long parent_ip, } fpr = container_of(rh, struct fprobe_rethook_node, node); fpr->entry_ip = ip; + fpr->entry_parent_ip = parent_ip; if (fp->entry_data_size) entry_data = fpr->data; } @@ -114,14 +116,26 @@ static void fprobe_exit_handler(struct rethook_node *rh, void *data, { struct fprobe *fp = (struct fprobe *)data; struct fprobe_rethook_node *fpr; + int bit; if (!fp || fprobe_disabled(fp)) return; fpr = container_of(rh, struct fprobe_rethook_node, node); + /* + * we need to assure no calls to traceable functions in-between the + * end of fprobe_handler and the beginning of fprobe_exit_handler. + */ + bit = ftrace_test_recursion_trylock(fpr->entry_ip, fpr->entry_parent_ip); + if (bit < 0) { + fp->nmissed++; + return; + } + fp->exit_handler(fp, fpr->entry_ip, regs, fp->entry_data_size ? (void *)fpr->data : NULL); + ftrace_test_recursion_unlock(bit); } NOKPROBE_SYMBOL(fprobe_exit_handler);

1 year, 8 months

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FAILED: patch "[PATCH] fprobe: make fprobe_kprobe_handler recursion free" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 3cc4e2c5fbae84e5033723fb7e350bc6c164e3a2 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023052246-morse-junkyard-a741@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: 3cc4e2c5fbae ("fprobe: make fprobe_kprobe_handler recursion free") 6049674b5720 ("tracing: fprobe: Initialize ret valiable to fix smatch error") 39d954200bf6 ("fprobe: Skip exit_handler if entry_handler returns !0") 7e7ef1bfe552 ("lib/test_fprobe: Add a test case for nr_maxactive") 34cabf8fd18f ("lib/test_fprobe: Add private entry_data testcases") 76d0de5729c0 ("fprobe: Pass entry_data to handlers") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 3cc4e2c5fbae84e5033723fb7e350bc6c164e3a2 Mon Sep 17 00:00:00 2001 From: Ze Gao <zegao2021(a)gmail.com> Date: Wed, 17 May 2023 11:45:07 +0800 Subject: [PATCH] fprobe: make fprobe_kprobe_handler recursion free Current implementation calls kprobe related functions before doing ftrace recursion check in fprobe_kprobe_handler, which opens door to kernel crash due to stack recursion if preempt_count_{add, sub} is traceable in kprobe_busy_{begin, end}. Things goes like this without this patch quoted from Steven: " fprobe_kprobe_handler() { kprobe_busy_begin() { preempt_disable() { preempt_count_add() { <-- trace fprobe_kprobe_handler() { [ wash, rinse, repeat, CRASH!!! ] " By refactoring the common part out of fprobe_kprobe_handler and fprobe_handler and call ftrace recursion detection at the very beginning, the whole fprobe_kprobe_handler is free from recursion. [ Fix the indentation of __fprobe_handler() parameters. ] Link: https://lore.kernel.org/all/20230517034510.15639-3-zegao@tencent.com/ Fixes: ab51e15d535e ("fprobe: Introduce FPROBE_FL_KPROBE_SHARED flag for fprobe") Signed-off-by: Ze Gao <zegao(a)tencent.com> Acked-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> Cc: stable(a)vger.kernel.org Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> diff --git a/kernel/trace/fprobe.c b/kernel/trace/fprobe.c index 293184227394..7a692c02f787 100644 --- a/kernel/trace/fprobe.c +++ b/kernel/trace/fprobe.c @@ -20,30 +20,22 @@ struct fprobe_rethook_node { char data[]; }; -static void fprobe_handler(unsigned long ip, unsigned long parent_ip, - struct ftrace_ops *ops, struct ftrace_regs *fregs) +static inline void __fprobe_handler(unsigned long ip, unsigned long parent_ip, + struct ftrace_ops *ops, struct ftrace_regs *fregs) { struct fprobe_rethook_node *fpr; struct rethook_node *rh = NULL; struct fprobe *fp; void *entry_data = NULL; - int bit, ret = 0; + int ret = 0; fp = container_of(ops, struct fprobe, ops); - if (fprobe_disabled(fp)) - return; - - bit = ftrace_test_recursion_trylock(ip, parent_ip); - if (bit < 0) { - fp->nmissed++; - return; - } if (fp->exit_handler) { rh = rethook_try_get(fp->rethook); if (!rh) { fp->nmissed++; - goto out; + return; } fpr = container_of(rh, struct fprobe_rethook_node, node); fpr->entry_ip = ip; @@ -61,23 +53,60 @@ static void fprobe_handler(unsigned long ip, unsigned long parent_ip, else rethook_hook(rh, ftrace_get_regs(fregs), true); } -out: +} + +static void fprobe_handler(unsigned long ip, unsigned long parent_ip, + struct ftrace_ops *ops, struct ftrace_regs *fregs) +{ + struct fprobe *fp; + int bit; + + fp = container_of(ops, struct fprobe, ops); + if (fprobe_disabled(fp)) + return; + + /* recursion detection has to go before any traceable function and + * all functions before this point should be marked as notrace + */ + bit = ftrace_test_recursion_trylock(ip, parent_ip); + if (bit < 0) { + fp->nmissed++; + return; + } + __fprobe_handler(ip, parent_ip, ops, fregs); ftrace_test_recursion_unlock(bit); + } NOKPROBE_SYMBOL(fprobe_handler); static void fprobe_kprobe_handler(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *ops, struct ftrace_regs *fregs) { - struct fprobe *fp = container_of(ops, struct fprobe, ops); + struct fprobe *fp; + int bit; + + fp = container_of(ops, struct fprobe, ops); + if (fprobe_disabled(fp)) + return; + + /* recursion detection has to go before any traceable function and + * all functions called before this point should be marked as notrace + */ + bit = ftrace_test_recursion_trylock(ip, parent_ip); + if (bit < 0) { + fp->nmissed++; + return; + } if (unlikely(kprobe_running())) { fp->nmissed++; return; } + kprobe_busy_begin(); - fprobe_handler(ip, parent_ip, ops, fregs); + __fprobe_handler(ip, parent_ip, ops, fregs); kprobe_busy_end(); + ftrace_test_recursion_unlock(bit); } static void fprobe_exit_handler(struct rethook_node *rh, void *data,

1 year, 8 months

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FAILED: patch "[PATCH] fprobe: make fprobe_kprobe_handler recursion free" failed to apply to 6.3-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.3-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.3.y git checkout FETCH_HEAD git cherry-pick -x 3cc4e2c5fbae84e5033723fb7e350bc6c164e3a2 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023052246-hardness-spoiling-5f03@gregkh' --subject-prefix 'PATCH 6.3.y' HEAD^.. Possible dependencies: 3cc4e2c5fbae ("fprobe: make fprobe_kprobe_handler recursion free") 6049674b5720 ("tracing: fprobe: Initialize ret valiable to fix smatch error") 39d954200bf6 ("fprobe: Skip exit_handler if entry_handler returns !0") 7e7ef1bfe552 ("lib/test_fprobe: Add a test case for nr_maxactive") 34cabf8fd18f ("lib/test_fprobe: Add private entry_data testcases") 76d0de5729c0 ("fprobe: Pass entry_data to handlers") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 3cc4e2c5fbae84e5033723fb7e350bc6c164e3a2 Mon Sep 17 00:00:00 2001 From: Ze Gao <zegao2021(a)gmail.com> Date: Wed, 17 May 2023 11:45:07 +0800 Subject: [PATCH] fprobe: make fprobe_kprobe_handler recursion free Current implementation calls kprobe related functions before doing ftrace recursion check in fprobe_kprobe_handler, which opens door to kernel crash due to stack recursion if preempt_count_{add, sub} is traceable in kprobe_busy_{begin, end}. Things goes like this without this patch quoted from Steven: " fprobe_kprobe_handler() { kprobe_busy_begin() { preempt_disable() { preempt_count_add() { <-- trace fprobe_kprobe_handler() { [ wash, rinse, repeat, CRASH!!! ] " By refactoring the common part out of fprobe_kprobe_handler and fprobe_handler and call ftrace recursion detection at the very beginning, the whole fprobe_kprobe_handler is free from recursion. [ Fix the indentation of __fprobe_handler() parameters. ] Link: https://lore.kernel.org/all/20230517034510.15639-3-zegao@tencent.com/ Fixes: ab51e15d535e ("fprobe: Introduce FPROBE_FL_KPROBE_SHARED flag for fprobe") Signed-off-by: Ze Gao <zegao(a)tencent.com> Acked-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> Cc: stable(a)vger.kernel.org Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> diff --git a/kernel/trace/fprobe.c b/kernel/trace/fprobe.c index 293184227394..7a692c02f787 100644 --- a/kernel/trace/fprobe.c +++ b/kernel/trace/fprobe.c @@ -20,30 +20,22 @@ struct fprobe_rethook_node { char data[]; }; -static void fprobe_handler(unsigned long ip, unsigned long parent_ip, - struct ftrace_ops *ops, struct ftrace_regs *fregs) +static inline void __fprobe_handler(unsigned long ip, unsigned long parent_ip, + struct ftrace_ops *ops, struct ftrace_regs *fregs) { struct fprobe_rethook_node *fpr; struct rethook_node *rh = NULL; struct fprobe *fp; void *entry_data = NULL; - int bit, ret = 0; + int ret = 0; fp = container_of(ops, struct fprobe, ops); - if (fprobe_disabled(fp)) - return; - - bit = ftrace_test_recursion_trylock(ip, parent_ip); - if (bit < 0) { - fp->nmissed++; - return; - } if (fp->exit_handler) { rh = rethook_try_get(fp->rethook); if (!rh) { fp->nmissed++; - goto out; + return; } fpr = container_of(rh, struct fprobe_rethook_node, node); fpr->entry_ip = ip; @@ -61,23 +53,60 @@ static void fprobe_handler(unsigned long ip, unsigned long parent_ip, else rethook_hook(rh, ftrace_get_regs(fregs), true); } -out: +} + +static void fprobe_handler(unsigned long ip, unsigned long parent_ip, + struct ftrace_ops *ops, struct ftrace_regs *fregs) +{ + struct fprobe *fp; + int bit; + + fp = container_of(ops, struct fprobe, ops); + if (fprobe_disabled(fp)) + return; + + /* recursion detection has to go before any traceable function and + * all functions before this point should be marked as notrace + */ + bit = ftrace_test_recursion_trylock(ip, parent_ip); + if (bit < 0) { + fp->nmissed++; + return; + } + __fprobe_handler(ip, parent_ip, ops, fregs); ftrace_test_recursion_unlock(bit); + } NOKPROBE_SYMBOL(fprobe_handler); static void fprobe_kprobe_handler(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *ops, struct ftrace_regs *fregs) { - struct fprobe *fp = container_of(ops, struct fprobe, ops); + struct fprobe *fp; + int bit; + + fp = container_of(ops, struct fprobe, ops); + if (fprobe_disabled(fp)) + return; + + /* recursion detection has to go before any traceable function and + * all functions called before this point should be marked as notrace + */ + bit = ftrace_test_recursion_trylock(ip, parent_ip); + if (bit < 0) { + fp->nmissed++; + return; + } if (unlikely(kprobe_running())) { fp->nmissed++; return; } + kprobe_busy_begin(); - fprobe_handler(ip, parent_ip, ops, fregs); + __fprobe_handler(ip, parent_ip, ops, fregs); kprobe_busy_end(); + ftrace_test_recursion_unlock(bit); } static void fprobe_exit_handler(struct rethook_node *rh, void *data,

1 year, 8 months

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FAILED: patch "[PATCH] s390/dasd: fix command reject error on ESE devices" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x c99bff34290f1b994073557b754aff86e4c7b22e # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023052255-gizmo-diagnosis-dd08@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: c99bff34290f ("s390/dasd: fix command reject error on ESE devices") 542e30ce8e6e ("s390/dasd: summarize dasd configuration data in a separate structure") 23596961b437 ("s390/dasd: split up dasd_eckd_read_conf") 952835edb4fd ("s390/dasd: fix use after free in dasd path handling") 2b7a8dc06d0f ("s390/dasd: Avoid field over-reading memcpy()") b72949328869 ("s390/dasd: Prepare for additional path event handling") 19508b204740 ("s390/dasd: Display FC Endpoint Security information via sysfs") 9e34c8ba9169 ("s390/dasd: Fix operational path inconsistency") 460181217a24 ("s390/dasd: Store path configuration data during path handling") d2a527580c0a ("s390/dasd: Move duplicate code to separate function") 5e6bdd37c552 ("s390/dasd: fix data corruption for thin provisioned devices") 00b39f698a4f ("s390/dasd: fix memleak in path handling error case") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From c99bff34290f1b994073557b754aff86e4c7b22e Mon Sep 17 00:00:00 2001 From: Stefan Haberland <sth(a)linux.ibm.com> Date: Fri, 19 May 2023 12:23:40 +0200 Subject: [PATCH] s390/dasd: fix command reject error on ESE devices Formatting a thin-provisioned (ESE) device that is part of a PPRC copy relation might fail with the following error: dasd-eckd 0.0.f500: An error occurred in the DASD device driver, reason=09 [...] 24 Byte: 0 MSG 4, no MSGb to SYSOP During format of an ESE disk the Release Allocated Space command is used. A bit in the payload of the command is set that is not allowed to be set for devices in a copy relation. This bit is set to allow the partial release of an extent. Check for the existence of a copy relation before setting the respective bit. Fixes: 91dc4a197569 ("s390/dasd: Add new ioctl to release space") Cc: stable(a)kernel.org # 5.3+ Signed-off-by: Stefan Haberland <sth(a)linux.ibm.com> Reviewed-by: Jan Hoeppner <hoeppner(a)linux.ibm.com> Link: https://lore.kernel.org/r/20230519102340.3854819-2-sth@linux.ibm.com Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index ade1369fe5ed..113c509bf6d0 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -127,6 +127,8 @@ static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, struct dasd_device *, struct dasd_device *, unsigned int, int, unsigned int, unsigned int, unsigned int, unsigned int); +static int dasd_eckd_query_pprc_status(struct dasd_device *, + struct dasd_pprc_data_sc4 *); /* initial attempt at a probe function. this can be simplified once * the other detection code is gone */ @@ -3733,6 +3735,26 @@ static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) return count; } +static int dasd_in_copy_relation(struct dasd_device *device) +{ + struct dasd_pprc_data_sc4 *temp; + int rc; + + if (!dasd_eckd_pprc_enabled(device)) + return 0; + + temp = kzalloc(sizeof(*temp), GFP_KERNEL); + if (!temp) + return -ENOMEM; + + rc = dasd_eckd_query_pprc_status(device, temp); + if (!rc) + rc = temp->dev_info[0].state; + + kfree(temp); + return rc; +} + /* * Release allocated space for a given range or an entire volume. */ @@ -3749,6 +3771,7 @@ dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, int cur_to_trk, cur_from_trk; struct dasd_ccw_req *cqr; u32 beg_cyl, end_cyl; + int copy_relation; struct ccw1 *ccw; int trks_per_ext; size_t ras_size; @@ -3760,6 +3783,10 @@ dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) return ERR_PTR(-EINVAL); + copy_relation = dasd_in_copy_relation(device); + if (copy_relation < 0) + return ERR_PTR(copy_relation); + rq = req ? blk_mq_rq_to_pdu(req) : NULL; features = &private->features; @@ -3788,9 +3815,11 @@ dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, /* * This bit guarantees initialisation of tracks within an extent that is * not fully specified, but is only supported with a certain feature - * subset. + * subset and for devices not in a copy relation. */ - ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); + if (features->feature[56] & 0x01 && !copy_relation) + ras_data->op_flags.guarantee_init = 1; + ras_data->lss = private->conf.ned->ID; ras_data->dev_addr = private->conf.ned->unit_addr; ras_data->nr_exts = nr_exts;

1 year, 8 months

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FAILED: patch "[PATCH] s390/dasd: fix command reject error on ESE devices" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x c99bff34290f1b994073557b754aff86e4c7b22e # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023052254-unused-ended-a111@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: c99bff34290f ("s390/dasd: fix command reject error on ESE devices") 542e30ce8e6e ("s390/dasd: summarize dasd configuration data in a separate structure") 23596961b437 ("s390/dasd: split up dasd_eckd_read_conf") 952835edb4fd ("s390/dasd: fix use after free in dasd path handling") 2b7a8dc06d0f ("s390/dasd: Avoid field over-reading memcpy()") b72949328869 ("s390/dasd: Prepare for additional path event handling") 19508b204740 ("s390/dasd: Display FC Endpoint Security information via sysfs") 9e34c8ba9169 ("s390/dasd: Fix operational path inconsistency") 460181217a24 ("s390/dasd: Store path configuration data during path handling") d2a527580c0a ("s390/dasd: Move duplicate code to separate function") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From c99bff34290f1b994073557b754aff86e4c7b22e Mon Sep 17 00:00:00 2001 From: Stefan Haberland <sth(a)linux.ibm.com> Date: Fri, 19 May 2023 12:23:40 +0200 Subject: [PATCH] s390/dasd: fix command reject error on ESE devices Formatting a thin-provisioned (ESE) device that is part of a PPRC copy relation might fail with the following error: dasd-eckd 0.0.f500: An error occurred in the DASD device driver, reason=09 [...] 24 Byte: 0 MSG 4, no MSGb to SYSOP During format of an ESE disk the Release Allocated Space command is used. A bit in the payload of the command is set that is not allowed to be set for devices in a copy relation. This bit is set to allow the partial release of an extent. Check for the existence of a copy relation before setting the respective bit. Fixes: 91dc4a197569 ("s390/dasd: Add new ioctl to release space") Cc: stable(a)kernel.org # 5.3+ Signed-off-by: Stefan Haberland <sth(a)linux.ibm.com> Reviewed-by: Jan Hoeppner <hoeppner(a)linux.ibm.com> Link: https://lore.kernel.org/r/20230519102340.3854819-2-sth@linux.ibm.com Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index ade1369fe5ed..113c509bf6d0 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -127,6 +127,8 @@ static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, struct dasd_device *, struct dasd_device *, unsigned int, int, unsigned int, unsigned int, unsigned int, unsigned int); +static int dasd_eckd_query_pprc_status(struct dasd_device *, + struct dasd_pprc_data_sc4 *); /* initial attempt at a probe function. this can be simplified once * the other detection code is gone */ @@ -3733,6 +3735,26 @@ static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) return count; } +static int dasd_in_copy_relation(struct dasd_device *device) +{ + struct dasd_pprc_data_sc4 *temp; + int rc; + + if (!dasd_eckd_pprc_enabled(device)) + return 0; + + temp = kzalloc(sizeof(*temp), GFP_KERNEL); + if (!temp) + return -ENOMEM; + + rc = dasd_eckd_query_pprc_status(device, temp); + if (!rc) + rc = temp->dev_info[0].state; + + kfree(temp); + return rc; +} + /* * Release allocated space for a given range or an entire volume. */ @@ -3749,6 +3771,7 @@ dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, int cur_to_trk, cur_from_trk; struct dasd_ccw_req *cqr; u32 beg_cyl, end_cyl; + int copy_relation; struct ccw1 *ccw; int trks_per_ext; size_t ras_size; @@ -3760,6 +3783,10 @@ dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) return ERR_PTR(-EINVAL); + copy_relation = dasd_in_copy_relation(device); + if (copy_relation < 0) + return ERR_PTR(copy_relation); + rq = req ? blk_mq_rq_to_pdu(req) : NULL; features = &private->features; @@ -3788,9 +3815,11 @@ dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, /* * This bit guarantees initialisation of tracks within an extent that is * not fully specified, but is only supported with a certain feature - * subset. + * subset and for devices not in a copy relation. */ - ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); + if (features->feature[56] & 0x01 && !copy_relation) + ras_data->op_flags.guarantee_init = 1; + ras_data->lss = private->conf.ned->ID; ras_data->dev_addr = private->conf.ned->unit_addr; ras_data->nr_exts = nr_exts;

1 year, 8 months

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FAILED: patch "[PATCH] s390/dasd: fix command reject error on ESE devices" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x c99bff34290f1b994073557b754aff86e4c7b22e # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023052253-upstairs-impeach-a2a9@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: c99bff34290f ("s390/dasd: fix command reject error on ESE devices") 542e30ce8e6e ("s390/dasd: summarize dasd configuration data in a separate structure") 23596961b437 ("s390/dasd: split up dasd_eckd_read_conf") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From c99bff34290f1b994073557b754aff86e4c7b22e Mon Sep 17 00:00:00 2001 From: Stefan Haberland <sth(a)linux.ibm.com> Date: Fri, 19 May 2023 12:23:40 +0200 Subject: [PATCH] s390/dasd: fix command reject error on ESE devices Formatting a thin-provisioned (ESE) device that is part of a PPRC copy relation might fail with the following error: dasd-eckd 0.0.f500: An error occurred in the DASD device driver, reason=09 [...] 24 Byte: 0 MSG 4, no MSGb to SYSOP During format of an ESE disk the Release Allocated Space command is used. A bit in the payload of the command is set that is not allowed to be set for devices in a copy relation. This bit is set to allow the partial release of an extent. Check for the existence of a copy relation before setting the respective bit. Fixes: 91dc4a197569 ("s390/dasd: Add new ioctl to release space") Cc: stable(a)kernel.org # 5.3+ Signed-off-by: Stefan Haberland <sth(a)linux.ibm.com> Reviewed-by: Jan Hoeppner <hoeppner(a)linux.ibm.com> Link: https://lore.kernel.org/r/20230519102340.3854819-2-sth@linux.ibm.com Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index ade1369fe5ed..113c509bf6d0 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -127,6 +127,8 @@ static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, struct dasd_device *, struct dasd_device *, unsigned int, int, unsigned int, unsigned int, unsigned int, unsigned int); +static int dasd_eckd_query_pprc_status(struct dasd_device *, + struct dasd_pprc_data_sc4 *); /* initial attempt at a probe function. this can be simplified once * the other detection code is gone */ @@ -3733,6 +3735,26 @@ static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) return count; } +static int dasd_in_copy_relation(struct dasd_device *device) +{ + struct dasd_pprc_data_sc4 *temp; + int rc; + + if (!dasd_eckd_pprc_enabled(device)) + return 0; + + temp = kzalloc(sizeof(*temp), GFP_KERNEL); + if (!temp) + return -ENOMEM; + + rc = dasd_eckd_query_pprc_status(device, temp); + if (!rc) + rc = temp->dev_info[0].state; + + kfree(temp); + return rc; +} + /* * Release allocated space for a given range or an entire volume. */ @@ -3749,6 +3771,7 @@ dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, int cur_to_trk, cur_from_trk; struct dasd_ccw_req *cqr; u32 beg_cyl, end_cyl; + int copy_relation; struct ccw1 *ccw; int trks_per_ext; size_t ras_size; @@ -3760,6 +3783,10 @@ dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) return ERR_PTR(-EINVAL); + copy_relation = dasd_in_copy_relation(device); + if (copy_relation < 0) + return ERR_PTR(copy_relation); + rq = req ? blk_mq_rq_to_pdu(req) : NULL; features = &private->features; @@ -3788,9 +3815,11 @@ dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, /* * This bit guarantees initialisation of tracks within an extent that is * not fully specified, but is only supported with a certain feature - * subset. + * subset and for devices not in a copy relation. */ - ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); + if (features->feature[56] & 0x01 && !copy_relation) + ras_data->op_flags.guarantee_init = 1; + ras_data->lss = private->conf.ned->ID; ras_data->dev_addr = private->conf.ned->unit_addr; ras_data->nr_exts = nr_exts;

1 year, 8 months

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FAILED: patch "[PATCH] powerpc/64s/radix: Fix soft dirty tracking" failed to apply to 4.14-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.14.y git checkout FETCH_HEAD git cherry-pick -x 66b2ca086210732954a7790d63d35542936fc664 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023052253-oppressed-blurb-418a@gregkh' --subject-prefix 'PATCH 4.14.y' HEAD^.. Possible dependencies: 66b2ca086210 ("powerpc/64s/radix: Fix soft dirty tracking") 47d99948eee4 ("powerpc/mm: Move book3s64 specifics in subdirectory mm/book3s64") fb0b0a73b223 ("powerpc: Enable kcov") e66c3209c7fd ("powerpc: Move page table dump files in a dedicated subdirectory") 7c91efce1608 ("powerpc/mm: dump block address translation on book3s/32") 0261a508c9fc ("powerpc/mm: dump segment registers on book3s/32") 32ea4c149990 ("powerpc/mm: Extend pte_fragment functionality to PPC32") a74791dd9833 ("powerpc/mm: add helpers to get/set mm.context->pte_frag") d09780f3a8d4 ("powerpc/mm: Move pgtable_t into platform headers") 994da93d1968 ("powerpc/mm: move platform specific mmu-xxx.h in platform directories") a95d133c8643 ("powerpc/mm: Move pte_fragment_alloc() to a common location") a43ccc4bc499 ("powerpc/book3s32: Remove CONFIG_BOOKE dependent code") 5b3e84fc10dd ("powerpc: change CONFIG_PPC_STD_MMU to CONFIG_PPC_BOOK3S") 68289ae935da ("powerpc: change CONFIG_PPC_STD_MMU_32 to CONFIG_PPC_BOOK3S_32") 9a8dd708d547 ("memblock: rename memblock_alloc{_nid,_try_nid} to memblock_phys_alloc*") 48e7b7695745 ("powerpc/64s/hash: Convert SLB miss handlers to C") 97026b5a5ac2 ("powerpc/mm: Split dump_pagelinuxtables flag_array table") 34eb138ed74d ("powerpc/mm: don't use _PAGE_EXEC for calling hash_preload()") c766ee72235d ("powerpc: handover page flags with a pgprot_t parameter") 56f3c1413f5c ("powerpc/mm: properly set PAGE_KERNEL flags in ioremap()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 66b2ca086210732954a7790d63d35542936fc664 Mon Sep 17 00:00:00 2001 From: Michael Ellerman <mpe(a)ellerman.id.au> Date: Thu, 11 May 2023 21:42:24 +1000 Subject: [PATCH] powerpc/64s/radix: Fix soft dirty tracking MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It was reported that soft dirty tracking doesn't work when using the Radix MMU. The tracking is supposed to work by clearing the soft dirty bit for a mapping and then write protecting the PTE. If/when the page is written to, a page fault occurs and the soft dirty bit is added back via pte_mkdirty(). For example in wp_page_reuse(): entry = maybe_mkwrite(pte_mkdirty(entry), vma); if (ptep_set_access_flags(vma, vmf->address, vmf->pte, entry, 1)) update_mmu_cache(vma, vmf->address, vmf->pte); Unfortunately on radix _PAGE_SOFTDIRTY is being dropped by radix__ptep_set_access_flags(), called from ptep_set_access_flags(), meaning the soft dirty bit is not set even though the page has been written to. Fix it by adding _PAGE_SOFTDIRTY to the set of bits that are able to be changed in radix__ptep_set_access_flags(). Fixes: b0b5e9b13047 ("powerpc/mm/radix: Add radix pte #defines") Cc: stable(a)vger.kernel.org # v4.7+ Reported-by: Dan Horák <dan(a)danny.cz> Link: https://lore.kernel.org/r/20230511095558.56663a50f86bdc4cd97700b7@danny.cz Signed-off-by: Michael Ellerman <mpe(a)ellerman.id.au> Link: https://msgid.link/20230511114224.977423-1-mpe@ellerman.id.au diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c index 26245aaf12b8..2297aa764ecd 100644 --- a/arch/powerpc/mm/book3s64/radix_pgtable.c +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c @@ -1040,8 +1040,8 @@ void radix__ptep_set_access_flags(struct vm_area_struct *vma, pte_t *ptep, pte_t entry, unsigned long address, int psize) { struct mm_struct *mm = vma->vm_mm; - unsigned long set = pte_val(entry) & (_PAGE_DIRTY | _PAGE_ACCESSED | - _PAGE_RW | _PAGE_EXEC); + unsigned long set = pte_val(entry) & (_PAGE_DIRTY | _PAGE_SOFT_DIRTY | + _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC); unsigned long change = pte_val(entry) ^ pte_val(*ptep); /*

1 year, 8 months

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FAILED: patch "[PATCH] powerpc/64s/radix: Fix soft dirty tracking" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x 66b2ca086210732954a7790d63d35542936fc664 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023052252-favoring-gratuity-348b@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^.. Possible dependencies: 66b2ca086210 ("powerpc/64s/radix: Fix soft dirty tracking") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 66b2ca086210732954a7790d63d35542936fc664 Mon Sep 17 00:00:00 2001 From: Michael Ellerman <mpe(a)ellerman.id.au> Date: Thu, 11 May 2023 21:42:24 +1000 Subject: [PATCH] powerpc/64s/radix: Fix soft dirty tracking MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It was reported that soft dirty tracking doesn't work when using the Radix MMU. The tracking is supposed to work by clearing the soft dirty bit for a mapping and then write protecting the PTE. If/when the page is written to, a page fault occurs and the soft dirty bit is added back via pte_mkdirty(). For example in wp_page_reuse(): entry = maybe_mkwrite(pte_mkdirty(entry), vma); if (ptep_set_access_flags(vma, vmf->address, vmf->pte, entry, 1)) update_mmu_cache(vma, vmf->address, vmf->pte); Unfortunately on radix _PAGE_SOFTDIRTY is being dropped by radix__ptep_set_access_flags(), called from ptep_set_access_flags(), meaning the soft dirty bit is not set even though the page has been written to. Fix it by adding _PAGE_SOFTDIRTY to the set of bits that are able to be changed in radix__ptep_set_access_flags(). Fixes: b0b5e9b13047 ("powerpc/mm/radix: Add radix pte #defines") Cc: stable(a)vger.kernel.org # v4.7+ Reported-by: Dan Horák <dan(a)danny.cz> Link: https://lore.kernel.org/r/20230511095558.56663a50f86bdc4cd97700b7@danny.cz Signed-off-by: Michael Ellerman <mpe(a)ellerman.id.au> Link: https://msgid.link/20230511114224.977423-1-mpe@ellerman.id.au diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c index 26245aaf12b8..2297aa764ecd 100644 --- a/arch/powerpc/mm/book3s64/radix_pgtable.c +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c @@ -1040,8 +1040,8 @@ void radix__ptep_set_access_flags(struct vm_area_struct *vma, pte_t *ptep, pte_t entry, unsigned long address, int psize) { struct mm_struct *mm = vma->vm_mm; - unsigned long set = pte_val(entry) & (_PAGE_DIRTY | _PAGE_ACCESSED | - _PAGE_RW | _PAGE_EXEC); + unsigned long set = pte_val(entry) & (_PAGE_DIRTY | _PAGE_SOFT_DIRTY | + _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC); unsigned long change = pte_val(entry) ^ pte_val(*ptep); /*

1 year, 8 months

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