April 2018 - Linux-stable-mirror

[PATCH AUTOSEL for 4.4 001/162] ALSA: timer: Wrap with spinlock for queue access

by Sasha Levin

From: Takashi Iwai <tiwai(a)suse.de> [ Upstream commit d7f910bfedd863d13ea320030fe98e42d0938ed5 ] For accessing the snd_timer_user queue indices, we take tu->qlock. But it's forgotten in a couple of places. The one in snd_timer_user_params() should be safe without the spinlock as the timer is already stopped. But it's better for consistency. The one in poll is just a read-out, so it's not inevitably needed, but it'd be good to make the result consistent, too. Tested-by: Alexander Potapenko <glider(a)google.com> Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Signed-off-by: Sasha Levin <alexander.levin(a)microsoft.com> --- sound/core/timer.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sound/core/timer.c b/sound/core/timer.c index 48eaccba82a3..fd622aa0bb93 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -1771,6 +1771,7 @@ static int snd_timer_user_params(struct file *file, } } } + spin_lock_irq(&tu->qlock); tu->qhead = tu->qtail = tu->qused = 0; if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { if (tu->tread) { @@ -1791,6 +1792,7 @@ static int snd_timer_user_params(struct file *file, } tu->filter = params.filter; tu->ticks = params.ticks; + spin_unlock_irq(&tu->qlock); err = 0; _end: if (copy_to_user(_params, &params, sizeof(params))) @@ -2029,10 +2031,12 @@ static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) poll_wait(file, &tu->qchange_sleep, wait); mask = 0; + spin_lock_irq(&tu->qlock); if (tu->qused) mask |= POLLIN | POLLRDNORM; if (tu->disconnected) mask |= POLLERR; + spin_unlock_irq(&tu->qlock); return mask; } -- 2.15.1

6 years, 9 months

2
163
0 0

[PATCH v2] crypto: caam: Drop leading zero from input buffer

by Fabio Estevam

From: Fabio Estevam <fabio.estevam(a)nxp.com> imx6ul and imx7 report the following error: caam_jr 2142000.jr1: 40000789: DECO: desc idx 7: Protocol Size Error - A protocol has seen an error in size. When running RSA, pdb size N < (size of F) when no formatting is used; or pdb size N < (F + 11) when formatting is used. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at crypto/asymmetric_keys/public_key.c:148 public_key_verify_signature+0x27c/0x2b0 This error happens because the signature contains 257 bytes, including a leading zero as the first element. Fix the problem by stripping off the leading zero from input data before feeding it to the CAAM accelerator. Fixes: 8c419778ab57e497b5 ("crypto: caam - add support for RSA algorithm") Cc: <stable(a)vger.kernel.org> Reported-by: Martin Townsend <mtownsend1973(a)gmail.com> Signed-off-by: Fabio Estevam <fabio.estevam(a)nxp.com> --- Changes since v1: - Use a temp pointer - Assign len to req->src_len , so that more than one leading zero can be taken into account drivers/crypto/caam/caampkc.c | 45 +++++++++++++++++++++++++++++++++++-------- 1 file changed, 37 insertions(+), 8 deletions(-) diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c index 7a897209..5f3e627 100644 --- a/drivers/crypto/caam/caampkc.c +++ b/drivers/crypto/caam/caampkc.c @@ -166,6 +166,14 @@ static void rsa_priv_f3_done(struct device *dev, u32 *desc, u32 err, akcipher_request_complete(req, err); } +static void caam_rsa_drop_leading_zeros(const u8 **ptr, size_t *nbytes) +{ + while (!**ptr && *nbytes) { + (*ptr)++; + (*nbytes)--; + } +} + static struct rsa_edesc *rsa_edesc_alloc(struct akcipher_request *req, size_t desclen) { @@ -178,7 +186,36 @@ static struct rsa_edesc *rsa_edesc_alloc(struct akcipher_request *req, int sgc; int sec4_sg_index, sec4_sg_len = 0, sec4_sg_bytes; int src_nents, dst_nents; + const u8 *temp; + void *buffer; + size_t len; + + buffer = kzalloc(req->src_len, GFP_ATOMIC); + if (!buffer) + return ERR_PTR(-ENOMEM); + + sg_copy_to_buffer(req->src, sg_nents(req->src), + buffer, req->src_len); + temp = (u8 *)buffer; + len = req->src_len; + /* + * Check if the buffer contains leading zeros and if + * it does, drop the leading zeros + */ + if (temp[0] == 0) { + caam_rsa_drop_leading_zeros(&temp, &len); + if (!temp) { + kfree(buffer); + return ERR_PTR(-ENOMEM); + } + + req->src_len = len; + sg_copy_from_buffer(req->src, sg_nents(req->src), + (void *)temp, req->src_len); + } + + kfree(buffer); src_nents = sg_nents_for_len(req->src, req->src_len); dst_nents = sg_nents_for_len(req->dst, req->dst_len); @@ -683,14 +720,6 @@ static void caam_rsa_free_key(struct caam_rsa_key *key) memset(key, 0, sizeof(*key)); } -static void caam_rsa_drop_leading_zeros(const u8 **ptr, size_t *nbytes) -{ - while (!**ptr && *nbytes) { - (*ptr)++; - (*nbytes)--; - } -} - /** * caam_read_rsa_crt - Used for reading dP, dQ, qInv CRT members. * dP, dQ and qInv could decode to less than corresponding p, q length, as the -- 2.7.4

6 years, 9 months

2
2
0 0

[PATCH] block: do not use interruptible wait anywhere

by Alan Jenkins

When blk_queue_enter() waits for a queue to unfreeze, or unset the PREEMPT_ONLY flag, do not allow it to be interrupted by a signal. The PREEMPT_ONLY flag was introduced later in commit 3a0a529971ec ("block, scsi: Make SCSI quiesce and resume work reliably"). Note the SCSI device is resumed asynchronously, i.e. after un-freezing userspace tasks. So that commit exposed the bug as a regression in v4.15. A mysterious SIGBUS (or -EIO) sometimes happened during the time the device was being resumed. Most frequently, there was no kernel log message, and we saw Xorg or Xwayland killed by SIGBUS.[1] [1] E.g. https://bugzilla.redhat.com/show_bug.cgi?id=1553979 Without this fix, I get an IO error in this test: # dd if=/dev/sda of=/dev/null iflag=direct & \ while killall -SIGUSR1 dd; do sleep 0.1; done & \ echo mem > /sys/power/state ; \ sleep 5; killall dd # stop after 5 seconds The interruptible wait was added to blk_queue_enter in commit 3ef28e83ab15 ("block: generic request_queue reference counting"). Before then, the interruptible wait was only in blk-mq, but I don't think it could ever have been correct. Cc: stable(a)vger.kernel.org Signed-off-by: Alan Jenkins <alan.christopher.jenkins(a)gmail.com> --- block/blk-core.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index abcb8684ba67..5a6d20069364 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -915,7 +915,6 @@ int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags) while (true) { bool success = false; - int ret; rcu_read_lock(); if (percpu_ref_tryget_live(&q->q_usage_counter)) { @@ -947,14 +946,12 @@ int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags) */ smp_rmb(); - ret = wait_event_interruptible(q->mq_freeze_wq, + wait_event(q->mq_freeze_wq, (atomic_read(&q->mq_freeze_depth) == 0 && (preempt || !blk_queue_preempt_only(q))) || blk_queue_dying(q)); if (blk_queue_dying(q)) return -ENODEV; - if (ret) - return ret; } } -- 2.14.3

6 years, 9 months

4
7
0 0

[PATCH] crypto: caam: Drop leading zero from input buffer

by Fabio Estevam

From: Fabio Estevam <fabio.estevam(a)nxp.com> imx6ul and imx7 report the following error: caam_jr 2142000.jr1: 40000789: DECO: desc idx 7: Protocol Size Error - A protocol has seen an error in size. When running RSA, pdb size N < (size of F) when no formatting is used; or pdb size N < (F + 11) when formatting is used. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at crypto/asymmetric_keys/public_key.c:148 public_key_verify_signature+0x27c/0x2b0 This error happens because the signature contains 257 bytes, including a leading zero as the first element. Fix the problem by striping off the leading zero from input data before feeding it to the CAAM accelerator. Fixes: 8c419778ab57e497b5 ("crypto: caam - add support for RSA algorithm") Cc: <stable(a)vger.kernel.org> Reported-by: Martin Townsend <mtownsend1973(a)gmail.com> Signed-off-by: Fabio Estevam <fabio.estevam(a)nxp.com> --- drivers/crypto/caam/caampkc.c | 43 +++++++++++++++++++++++++++++++++++-------- 1 file changed, 35 insertions(+), 8 deletions(-) diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c index 7a897209..d2ad547 100644 --- a/drivers/crypto/caam/caampkc.c +++ b/drivers/crypto/caam/caampkc.c @@ -166,6 +166,14 @@ static void rsa_priv_f3_done(struct device *dev, u32 *desc, u32 err, akcipher_request_complete(req, err); } +static void caam_rsa_drop_leading_zeros(const u8 **ptr, size_t *nbytes) +{ + while (!**ptr && *nbytes) { + (*ptr)++; + (*nbytes)--; + } +} + static struct rsa_edesc *rsa_edesc_alloc(struct akcipher_request *req, size_t desclen) { @@ -178,7 +186,34 @@ static struct rsa_edesc *rsa_edesc_alloc(struct akcipher_request *req, int sgc; int sec4_sg_index, sec4_sg_len = 0, sec4_sg_bytes; int src_nents, dst_nents; + const u8 *buffer; + size_t len; + + buffer = kzalloc(req->src_len, GFP_ATOMIC); + if (!buffer) + return ERR_PTR(-ENOMEM); + + sg_copy_to_buffer(req->src, sg_nents(req->src), + (void *)buffer, req->src_len); + len = req->src_len; + /* + * Check if the buffer contains leading zero and if + * it does, drop the leading zero + */ + if (buffer[0] == 0) { + caam_rsa_drop_leading_zeros(&buffer, &len); + if (!buffer) { + kfree(buffer); + return ERR_PTR(-ENOMEM); + } + + req->src_len -= 1; + sg_copy_from_buffer(req->src, sg_nents(req->src), + (void *)buffer, req->src_len); + } + + kfree(buffer); src_nents = sg_nents_for_len(req->src, req->src_len); dst_nents = sg_nents_for_len(req->dst, req->dst_len); @@ -683,14 +718,6 @@ static void caam_rsa_free_key(struct caam_rsa_key *key) memset(key, 0, sizeof(*key)); } -static void caam_rsa_drop_leading_zeros(const u8 **ptr, size_t *nbytes) -{ - while (!**ptr && *nbytes) { - (*ptr)++; - (*nbytes)--; - } -} - /** * caam_read_rsa_crt - Used for reading dP, dQ, qInv CRT members. * dP, dQ and qInv could decode to less than corresponding p, q length, as the -- 2.7.4

6 years, 9 months

2
2
0 0

[PATCH stable v4.15 3/3] media: staging: lirc_zilog: incorrect reference counting

by Sean Young

Whenever poll is called, the reference count is increased but never decreased. This means that on rmmod, the lirc_thread is not stopped, and will trample over freed memory. Zilog/Hauppauge IR driver unloaded BUG: unable to handle kernel paging request at ffffffffc17ba640 Oops: 0010 [#1] SMP CPU: 1 PID: 667 Comm: zilog-rx-i2c-1 Tainted: P C OE 4.13.16-302.fc27.x86_64 #1 Hardware name: Gigabyte Technology Co., Ltd. GA-MA790FXT-UD5P/GA-MA790FXT-UD5P, BIOS F6 08/06/2009 task: ffff964eb452ca00 task.stack: ffffb254414dc000 RIP: 0010:0xffffffffc17ba640 RSP: 0018:ffffb254414dfe78 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff964ec1b35890 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000246 RBP: ffffb254414dff00 R08: 000000000000036e R09: ffff964ecfc8dfd0 R10: ffffb254414dfe78 R11: 00000000000f4240 R12: ffff964ec2bf28a0 R13: ffff964ec1b358a8 R14: ffff964ec1b358d0 R15: ffff964ec1b35800 FS: 0000000000000000(0000) GS:ffff964ecfc80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffc17ba640 CR3: 000000023058c000 CR4: 00000000000006e0 Call Trace: kthread+0x125/0x140 ? kthread_park+0x60/0x60 ? do_syscall_64+0x67/0x140 ret_from_fork+0x25/0x30 Code: Bad RIP value. RIP: 0xffffffffc17ba640 RSP: ffffb254414dfe78 CR2: ffffffffc17ba640 Note that zilog-rx-i2c-1 should have exited by now, but hasn't due to the missing put in poll(). This code has been replaced completely in kernel v4.16 by a new driver, see commit acaa34bf06e9 ("media: rc: implement zilog transmitter"), and commit f95367a7b758 ("media: staging: remove lirc_zilog driver"). Cc: stable(a)vger.kernel.org # v4.15- (all up to and including v4.15) Reported-by: Warren Sturm <warren.sturm(a)gmail.com> Tested-by: Warren Sturm <warren.sturm(a)gmail.com> Signed-off-by: Sean Young <sean(a)mess.org> --- drivers/staging/media/lirc/lirc_zilog.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/staging/media/lirc/lirc_zilog.c b/drivers/staging/media/lirc/lirc_zilog.c index e8d6c1abc6d8..022720210f70 100644 --- a/drivers/staging/media/lirc/lirc_zilog.c +++ b/drivers/staging/media/lirc/lirc_zilog.c @@ -1227,6 +1227,7 @@ static unsigned int poll(struct file *filep, poll_table *wait) dev_dbg(ir->dev, "%s result = %s\n", __func__, ret ? "POLLIN|POLLRDNORM" : "none"); + put_ir_rx(rx, false); return ret; } -- 2.14.3

6 years, 9 months

1
0
0 0

[PATCH stable v4.15 2/3] Revert "media: lirc_zilog: driver only sends LIRCCODE"

by Sean Young

The lirc config documented here https://www.blushingpenguin.com/mark/blog/?p=24 uses raw_codes for sending IR. Each key only has one pulse, which in fact is an index into the haup-ir-blaster.bin file. Changing the driver to LIRCCODE (although more accurate) breaks this configuration. This code has been replaced completely in kernel v4.16 by a new driver, see commit acaa34bf06e9 ("media: rc: implement zilog transmitter"), and commit f95367a7b758 ("media: staging: remove lirc_zilog driver"). This reverts commit 89d8a2cc51d1f29ea24a0b44dde13253141190a0. Fixes: 615cd3fe6ccc ("[media] media: lirc_dev: make better use of file->private_data") Cc: stable(a)vger.kernel.org # v4.14-v4.15 Reported-by: Warren Sturm <warren.sturm(a)gmail.com> Tested-by: Warren Sturm <warren.sturm(a)gmail.com> Signed-off-by: Sean Young <sean(a)mess.org> --- drivers/staging/media/lirc/lirc_zilog.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/staging/media/lirc/lirc_zilog.c b/drivers/staging/media/lirc/lirc_zilog.c index bf6869e48a0f..e8d6c1abc6d8 100644 --- a/drivers/staging/media/lirc/lirc_zilog.c +++ b/drivers/staging/media/lirc/lirc_zilog.c @@ -287,7 +287,7 @@ static void release_ir_tx(struct kref *ref) struct IR_tx *tx = container_of(ref, struct IR_tx, ref); struct IR *ir = tx->ir; - ir->l->features &= ~LIRC_CAN_SEND_LIRCCODE; + ir->l->features &= ~LIRC_CAN_SEND_PULSE; /* Don't put_ir_device(tx->ir) here, so our lock doesn't get freed */ ir->tx = NULL; kfree(tx); @@ -1266,14 +1266,14 @@ static long ioctl(struct file *filep, unsigned int cmd, unsigned long arg) if (!(features & LIRC_CAN_SEND_MASK)) return -ENOTTY; - result = put_user(LIRC_MODE_LIRCCODE, uptr); + result = put_user(LIRC_MODE_PULSE, uptr); break; case LIRC_SET_SEND_MODE: if (!(features & LIRC_CAN_SEND_MASK)) return -ENOTTY; result = get_user(mode, uptr); - if (!result && mode != LIRC_MODE_LIRCCODE) + if (!result && mode != LIRC_MODE_PULSE) return -EINVAL; break; default: @@ -1482,7 +1482,7 @@ static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id) kref_init(&tx->ref); ir->tx = tx; - ir->l->features |= LIRC_CAN_SEND_LIRCCODE; + ir->l->features |= LIRC_CAN_SEND_PULSE; mutex_init(&tx->client_lock); tx->c = client; tx->need_boot = 1; -- 2.14.3

6 years, 9 months

1
0
0 0

[PATCH stable v4.14 2/2] media: staging: lirc_zilog: incorrect reference counting

by Sean Young

Whenever poll is called, the reference count is increased but never decreased. This means that on rmmod, the lirc_thread is not stopped, and will trample over freed memory. Zilog/Hauppauge IR driver unloaded BUG: unable to handle kernel paging request at ffffffffc17ba640 Oops: 0010 [#1] SMP CPU: 1 PID: 667 Comm: zilog-rx-i2c-1 Tainted: P C OE 4.13.16-302.fc27.x86_64 #1 Hardware name: Gigabyte Technology Co., Ltd. GA-MA790FXT-UD5P/GA-MA790FXT-UD5P, BIOS F6 08/06/2009 task: ffff964eb452ca00 task.stack: ffffb254414dc000 RIP: 0010:0xffffffffc17ba640 RSP: 0018:ffffb254414dfe78 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff964ec1b35890 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000246 RBP: ffffb254414dff00 R08: 000000000000036e R09: ffff964ecfc8dfd0 R10: ffffb254414dfe78 R11: 00000000000f4240 R12: ffff964ec2bf28a0 R13: ffff964ec1b358a8 R14: ffff964ec1b358d0 R15: ffff964ec1b35800 FS: 0000000000000000(0000) GS:ffff964ecfc80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffc17ba640 CR3: 000000023058c000 CR4: 00000000000006e0 Call Trace: kthread+0x125/0x140 ? kthread_park+0x60/0x60 ? do_syscall_64+0x67/0x140 ret_from_fork+0x25/0x30 Code: Bad RIP value. RIP: 0xffffffffc17ba640 RSP: ffffb254414dfe78 CR2: ffffffffc17ba640 Note that zilog-rx-i2c-1 should have exited by now, but hasn't due to the missing put in poll(). This code has been replaced completely in kernel v4.16 by a new driver, see commit acaa34bf06e9 ("media: rc: implement zilog transmitter"), and commit f95367a7b758 ("media: staging: remove lirc_zilog driver"). Cc: stable(a)vger.kernel.org # v4.15- (all up to and including v4.15) Reported-by: Warren Sturm <warren.sturm(a)gmail.com> Tested-by: Warren Sturm <warren.sturm(a)gmail.com> Signed-off-by: Sean Young <sean(a)mess.org> --- drivers/staging/media/lirc/lirc_zilog.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/staging/media/lirc/lirc_zilog.c b/drivers/staging/media/lirc/lirc_zilog.c index 26dd32d5b5b2..e35e1b2160e3 100644 --- a/drivers/staging/media/lirc/lirc_zilog.c +++ b/drivers/staging/media/lirc/lirc_zilog.c @@ -1228,6 +1228,7 @@ static unsigned int poll(struct file *filep, poll_table *wait) dev_dbg(ir->l.dev, "%s result = %s\n", __func__, ret ? "POLLIN|POLLRDNORM" : "none"); + put_ir_rx(rx, false); return ret; } -- 2.14.3

6 years, 9 months

1
0
0 0

[PATCH stable v4.14 1/2] Revert "media: lirc_zilog: driver only sends LIRCCODE"

by Sean Young

The lirc config documented here https://www.blushingpenguin.com/mark/blog/?p=24 uses raw_codes for sending IR. Each key only has one pulse, which in fact is an index into the haup-ir-blaster.bin file. Changing the driver to LIRCCODE (although more accurate) breaks this configuration. This code has been replaced completely in kernel v4.16 by a new driver, see commit acaa34bf06e9 ("media: rc: implement zilog transmitter"), and commit f95367a7b758 ("media: staging: remove lirc_zilog driver"). This reverts commit 89d8a2cc51d1f29ea24a0b44dde13253141190a0. Fixes: 615cd3fe6ccc ("[media] media: lirc_dev: make better use of file->private_data") Cc: stable(a)vger.kernel.org # v4.14-v4.15 Reported-by: Warren Sturm <warren.sturm(a)gmail.com> Tested-by: Warren Sturm <warren.sturm(a)gmail.com> Signed-off-by: Sean Young <sean(a)mess.org> --- drivers/staging/media/lirc/lirc_zilog.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/staging/media/lirc/lirc_zilog.c b/drivers/staging/media/lirc/lirc_zilog.c index 71af13bd0ebd..26dd32d5b5b2 100644 --- a/drivers/staging/media/lirc/lirc_zilog.c +++ b/drivers/staging/media/lirc/lirc_zilog.c @@ -288,7 +288,7 @@ static void release_ir_tx(struct kref *ref) struct IR_tx *tx = container_of(ref, struct IR_tx, ref); struct IR *ir = tx->ir; - ir->l.features &= ~LIRC_CAN_SEND_LIRCCODE; + ir->l.features &= ~LIRC_CAN_SEND_PULSE; /* Don't put_ir_device(tx->ir) here, so our lock doesn't get freed */ ir->tx = NULL; kfree(tx); @@ -1267,14 +1267,14 @@ static long ioctl(struct file *filep, unsigned int cmd, unsigned long arg) if (!(features & LIRC_CAN_SEND_MASK)) return -ENOTTY; - result = put_user(LIRC_MODE_LIRCCODE, uptr); + result = put_user(LIRC_MODE_PULSE, uptr); break; case LIRC_SET_SEND_MODE: if (!(features & LIRC_CAN_SEND_MASK)) return -ENOTTY; result = get_user(mode, uptr); - if (!result && mode != LIRC_MODE_LIRCCODE) + if (!result && mode != LIRC_MODE_PULSE) return -EINVAL; break; default: @@ -1512,7 +1512,7 @@ static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id) kref_init(&tx->ref); ir->tx = tx; - ir->l.features |= LIRC_CAN_SEND_LIRCCODE; + ir->l.features |= LIRC_CAN_SEND_PULSE; mutex_init(&tx->client_lock); tx->c = client; tx->need_boot = 1; -- 2.14.3

6 years, 9 months

1
0
0 0

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by Mr Spamming

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6 years, 9 months

1
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by Mohammed

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6 years, 9 months

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Linux-stable-mirror April 2018