July 2024 - Linux-stable-mirror

[PATCH v3] drm/gma500: fix null pointer dereference in psb_intel_lvds_get_modes

by Ma Ke

In psb_intel_lvds_get_modes(), the return value of drm_mode_duplicate() is assigned to mode, which will lead to a possible NULL pointer dereference on failure of drm_mode_duplicate(). Add a check to avoid npd. Cc: stable(a)vger.kernel.org Fixes: 89c78134cc54 ("gma500: Add Poulsbo support") Signed-off-by: Ma Ke <make24(a)iscas.ac.cn> --- Changes in v3: - added the recipient's email address, due to the prolonged absence of a response from the recipients. Changes in v2: - modified the patch according to suggestions; - added Fixes line; - added Cc stable. --- drivers/gpu/drm/gma500/psb_intel_lvds.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/gma500/psb_intel_lvds.c b/drivers/gpu/drm/gma500/psb_intel_lvds.c index 8486de230ec9..8d1be94a443b 100644 --- a/drivers/gpu/drm/gma500/psb_intel_lvds.c +++ b/drivers/gpu/drm/gma500/psb_intel_lvds.c @@ -504,6 +504,9 @@ static int psb_intel_lvds_get_modes(struct drm_connector *connector) if (mode_dev->panel_fixed_mode != NULL) { struct drm_display_mode *mode = drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); + if (!mode) + return 0; + drm_mode_probed_add(connector, mode); return 1; } -- 2.25.1

1 year, 5 months

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[PATCH iwl-next] ice: Add a per-VF limit on number of FDIR filters

by Ahmed Zaki

While the iavf driver adds a s/w limit (128) on the number of FDIR filters that the VF can request, a malicious VF driver can request more than that and exhaust the resources for other VFs. Add a similar limit in ice. CC: stable(a)vger.kernel.org Reviewed-by: Przemek Kitszel <przemyslaw.kitszel(a)intel.com> Suggested-by: Sridhar Samudrala <sridhar.samudrala(a)intel.com> Signed-off-by: Ahmed Zaki <ahmed.zaki(a)intel.com> --- .../net/ethernet/intel/ice/ice_ethtool_fdir.c | 2 +- drivers/net/ethernet/intel/ice/ice_fdir.h | 3 +++ .../net/ethernet/intel/ice/ice_virtchnl_fdir.c | 16 ++++++++++++++++ .../net/ethernet/intel/ice/ice_virtchnl_fdir.h | 1 + 4 files changed, 21 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c b/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c index e3cab8e98f52..5412eff8ef23 100644 --- a/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c +++ b/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c @@ -534,7 +534,7 @@ ice_parse_rx_flow_user_data(struct ethtool_rx_flow_spec *fsp, * * Returns the number of available flow director filters to this VSI */ -static int ice_fdir_num_avail_fltr(struct ice_hw *hw, struct ice_vsi *vsi) +int ice_fdir_num_avail_fltr(struct ice_hw *hw, struct ice_vsi *vsi) { u16 vsi_num = ice_get_hw_vsi_num(hw, vsi->idx); u16 num_guar; diff --git a/drivers/net/ethernet/intel/ice/ice_fdir.h b/drivers/net/ethernet/intel/ice/ice_fdir.h index 021ecbac7848..ab5b118daa2d 100644 --- a/drivers/net/ethernet/intel/ice/ice_fdir.h +++ b/drivers/net/ethernet/intel/ice/ice_fdir.h @@ -207,6 +207,8 @@ struct ice_fdir_base_pkt { const u8 *tun_pkt; }; +struct ice_vsi; + int ice_alloc_fd_res_cntr(struct ice_hw *hw, u16 *cntr_id); int ice_free_fd_res_cntr(struct ice_hw *hw, u16 cntr_id); int ice_alloc_fd_guar_item(struct ice_hw *hw, u16 *cntr_id, u16 num_fltr); @@ -218,6 +220,7 @@ int ice_fdir_get_gen_prgm_pkt(struct ice_hw *hw, struct ice_fdir_fltr *input, u8 *pkt, bool frag, bool tun); int ice_get_fdir_cnt_all(struct ice_hw *hw); +int ice_fdir_num_avail_fltr(struct ice_hw *hw, struct ice_vsi *vsi); bool ice_fdir_is_dup_fltr(struct ice_hw *hw, struct ice_fdir_fltr *input); bool ice_fdir_has_frag(enum ice_fltr_ptype flow); struct ice_fdir_fltr * diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c b/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c index b8df8d0b2d85..60bf71da53bd 100644 --- a/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c +++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c @@ -550,6 +550,8 @@ static void ice_vc_fdir_reset_cnt_all(struct ice_vf_fdir *fdir) fdir->fdir_fltr_cnt[flow][0] = 0; fdir->fdir_fltr_cnt[flow][1] = 0; } + + fdir->fdir_fltr_cnt_total = 0; } /** @@ -1694,6 +1696,7 @@ ice_vc_add_fdir_fltr_post(struct ice_vf *vf, struct ice_vf_fdir_ctx *ctx, resp->status = status; resp->flow_id = conf->flow_id; vf->fdir.fdir_fltr_cnt[conf->input.flow_type][is_tun]++; + vf->fdir.fdir_fltr_cnt_total++; ret = ice_vc_send_msg_to_vf(vf, ctx->v_opcode, v_ret, (u8 *)resp, len); @@ -1758,6 +1761,7 @@ ice_vc_del_fdir_fltr_post(struct ice_vf *vf, struct ice_vf_fdir_ctx *ctx, resp->status = status; ice_vc_fdir_remove_entry(vf, conf, conf->flow_id); vf->fdir.fdir_fltr_cnt[conf->input.flow_type][is_tun]--; + vf->fdir.fdir_fltr_cnt_total--; ret = ice_vc_send_msg_to_vf(vf, ctx->v_opcode, v_ret, (u8 *)resp, len); @@ -2074,6 +2078,7 @@ int ice_vc_add_fdir_fltr(struct ice_vf *vf, u8 *msg) struct virtchnl_fdir_add *stat = NULL; struct virtchnl_fdir_fltr_conf *conf; enum virtchnl_status_code v_ret; + struct ice_vsi *vf_vsi; struct device *dev; struct ice_pf *pf; int is_tun = 0; @@ -2082,6 +2087,17 @@ int ice_vc_add_fdir_fltr(struct ice_vf *vf, u8 *msg) pf = vf->pf; dev = ice_pf_to_dev(pf); + vf_vsi = ice_get_vf_vsi(vf); + +#define ICE_VF_MAX_FDIR_FILTERS 128 + if (!ice_fdir_num_avail_fltr(&pf->hw, vf_vsi) || + vf->fdir.fdir_fltr_cnt_total >= ICE_VF_MAX_FDIR_FILTERS) { + v_ret = VIRTCHNL_STATUS_ERR_PARAM; + dev_err(dev, "Max number of FDIR filters for VF %d is reached\n", + vf->vf_id); + goto err_exit; + } + ret = ice_vc_fdir_param_check(vf, fltr->vsi_id); if (ret) { v_ret = VIRTCHNL_STATUS_ERR_PARAM; diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.h b/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.h index c5bcc8d7481c..ac6dcab454b4 100644 --- a/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.h +++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.h @@ -29,6 +29,7 @@ struct ice_vf_fdir_ctx { struct ice_vf_fdir { u16 fdir_fltr_cnt[ICE_FLTR_PTYPE_MAX][ICE_FD_HW_SEG_MAX]; int prof_entry_cnt[ICE_FLTR_PTYPE_MAX][ICE_FD_HW_SEG_MAX]; + u16 fdir_fltr_cnt_total; struct ice_fd_hw_prof **fdir_prof; struct idr fdir_rule_idr; -- 2.43.0

1 year, 5 months

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[PATCH net v3 2/4] ipv6: fix source address selection with route leak

by Nicolas Dichtel

By default, an address assigned to the output interface is selected when the source address is not specified. This is problematic when a route, configured in a vrf, uses an interface from another vrf (aka route leak). The original vrf does not own the selected source address. Let's add a check against the output interface and call the appropriate function to select the source address. CC: stable(a)vger.kernel.org Fixes: 0d240e7811c4 ("net: vrf: Implement get_saddr for IPv6") Signed-off-by: Nicolas Dichtel <nicolas.dichtel(a)6wind.com> --- include/net/ip6_route.h | 21 ++++++++++++++------- net/ipv6/ip6_output.c | 1 + net/ipv6/route.c | 2 +- 3 files changed, 16 insertions(+), 8 deletions(-) diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h index a18ed24fed94..667f0a517fd0 100644 --- a/include/net/ip6_route.h +++ b/include/net/ip6_route.h @@ -127,18 +127,25 @@ void rt6_age_exceptions(struct fib6_info *f6i, struct fib6_gc_args *gc_args, static inline int ip6_route_get_saddr(struct net *net, struct fib6_info *f6i, const struct in6_addr *daddr, - unsigned int prefs, + unsigned int prefs, int l3mdev_index, struct in6_addr *saddr) { + struct net_device *l3mdev; + struct net_device *dev; + bool same_vrf; int err = 0; - if (f6i && f6i->fib6_prefsrc.plen) { - *saddr = f6i->fib6_prefsrc.addr; - } else { - struct net_device *dev = f6i ? fib6_info_nh_dev(f6i) : NULL; + rcu_read_lock(); - err = ipv6_dev_get_saddr(net, dev, daddr, prefs, saddr); - } + l3mdev = dev_get_by_index_rcu(net, l3mdev_index); + dev = f6i ? fib6_info_nh_dev(f6i) : NULL; + same_vrf = !l3mdev || l3mdev_master_dev_rcu(dev) == l3mdev; + if (f6i && f6i->fib6_prefsrc.plen && same_vrf) + *saddr = f6i->fib6_prefsrc.addr; + else + err = ipv6_dev_get_saddr(net, same_vrf ? dev : l3mdev, daddr, prefs, saddr); + + rcu_read_unlock(); return err; } diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 27d8725445e3..784424ac4147 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1124,6 +1124,7 @@ static int ip6_dst_lookup_tail(struct net *net, const struct sock *sk, from = rt ? rcu_dereference(rt->from) : NULL; err = ip6_route_get_saddr(net, from, &fl6->daddr, sk ? READ_ONCE(inet6_sk(sk)->srcprefs) : 0, + fl6->flowi6_l3mdev, &fl6->saddr); rcu_read_unlock(); diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 8d72ca0b086d..c9a9506b714d 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -5689,7 +5689,7 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb, goto nla_put_failure; } else if (dest) { struct in6_addr saddr_buf; - if (ip6_route_get_saddr(net, rt, dest, 0, &saddr_buf) == 0 && + if (ip6_route_get_saddr(net, rt, dest, 0, 0, &saddr_buf) == 0 && nla_put_in6_addr(skb, RTA_PREFSRC, &saddr_buf)) goto nla_put_failure; } -- 2.43.1

1 year, 5 months

2
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[PATCH net v3 1/4] ipv4: fix source address selection with route leak

by Nicolas Dichtel

By default, an address assigned to the output interface is selected when the source address is not specified. This is problematic when a route, configured in a vrf, uses an interface from another vrf (aka route leak). The original vrf does not own the selected source address. Let's add a check against the output interface and call the appropriate function to select the source address. CC: stable(a)vger.kernel.org Fixes: 8cbb512c923d ("net: Add source address lookup op for VRF") Signed-off-by: Nicolas Dichtel <nicolas.dichtel(a)6wind.com> --- net/ipv4/fib_semantics.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index f669da98d11d..8956026bc0a2 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -2270,6 +2270,15 @@ void fib_select_path(struct net *net, struct fib_result *res, fib_select_default(fl4, res); check_saddr: - if (!fl4->saddr) - fl4->saddr = fib_result_prefsrc(net, res); + if (!fl4->saddr) { + struct net_device *l3mdev; + + l3mdev = dev_get_by_index_rcu(net, fl4->flowi4_l3mdev); + + if (!l3mdev || + l3mdev_master_dev_rcu(FIB_RES_DEV(*res)) == l3mdev) + fl4->saddr = fib_result_prefsrc(net, res); + else + fl4->saddr = inet_select_addr(l3mdev, 0, RT_SCOPE_LINK); + } } -- 2.43.1

1 year, 5 months

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+ mm-truncate-batch-clear-shadow-entries.patch added to mm-unstable branch

by Andrew Morton

The patch titled Subject: mm/truncate: batch-clear shadow entries has been added to the -mm mm-unstable branch. Its filename is mm-truncate-batch-clear-shadow-entries.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Yu Zhao <yuzhao(a)google.com> Subject: mm/truncate: batch-clear shadow entries Date: Mon, 8 Jul 2024 15:27:53 -0600 Make clear_shadow_entry() clear shadow entries in `struct folio_batch` so that it can reduce contention on i_lock and i_pages locks, e.g., watchdog: BUG: soft lockup - CPU#29 stuck for 11s! [fio:2701649] clear_shadow_entry+0x3d/0x100 mapping_try_invalidate+0x117/0x1d0 invalidate_mapping_pages+0x10/0x20 invalidate_bdev+0x3c/0x50 blkdev_common_ioctl+0x5f7/0xa90 blkdev_ioctl+0x109/0x270 Link: https://lkml.kernel.org/r/20240708212753.3120511-1-yuzhao@google.com Reported-by: Bharata B Rao <bharata(a)amd.com> Closes: https://lore.kernel.org/d2841226-e27b-4d3d-a578-63587a3aa4f3@amd.com/ Signed-off-by: Yu Zhao <yuzhao(a)google.com> Cc: Mel Gorman <mgorman(a)techsingularity.net> Cc: Johannes Weiner <hannes(a)cmpxchg.org> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/truncate.c | 67 +++++++++++++++++++++--------------------------- 1 file changed, 30 insertions(+), 37 deletions(-) --- a/mm/truncate.c~mm-truncate-batch-clear-shadow-entries +++ a/mm/truncate.c @@ -39,12 +39,24 @@ static inline void __clear_shadow_entry( xas_store(&xas, NULL); } -static void clear_shadow_entry(struct address_space *mapping, pgoff_t index, - void *entry) +static void clear_shadow_entry(struct address_space *mapping, + struct folio_batch *fbatch, pgoff_t *indices) { + int i; + + if (shmem_mapping(mapping) || dax_mapping(mapping)) + return; + spin_lock(&mapping->host->i_lock); xa_lock_irq(&mapping->i_pages); - __clear_shadow_entry(mapping, index, entry); + + for (i = 0; i < folio_batch_count(fbatch); i++) { + struct folio *folio = fbatch->folios[i]; + + if (xa_is_value(folio)) + __clear_shadow_entry(mapping, indices[i], folio); + } + xa_unlock_irq(&mapping->i_pages); if (mapping_shrinkable(mapping)) inode_add_lru(mapping->host); @@ -105,36 +117,6 @@ static void truncate_folio_batch_excepti fbatch->nr = j; } -/* - * Invalidate exceptional entry if easily possible. This handles exceptional - * entries for invalidate_inode_pages(). - */ -static int invalidate_exceptional_entry(struct address_space *mapping, - pgoff_t index, void *entry) -{ - /* Handled by shmem itself, or for DAX we do nothing. */ - if (shmem_mapping(mapping) || dax_mapping(mapping)) - return 1; - clear_shadow_entry(mapping, index, entry); - return 1; -} - -/* - * Invalidate exceptional entry if clean. This handles exceptional entries for - * invalidate_inode_pages2() so for DAX it evicts only clean entries. - */ -static int invalidate_exceptional_entry2(struct address_space *mapping, - pgoff_t index, void *entry) -{ - /* Handled by shmem itself */ - if (shmem_mapping(mapping)) - return 1; - if (dax_mapping(mapping)) - return dax_invalidate_mapping_entry_sync(mapping, index); - clear_shadow_entry(mapping, index, entry); - return 1; -} - /** * folio_invalidate - Invalidate part or all of a folio. * @folio: The folio which is affected. @@ -494,6 +476,7 @@ unsigned long mapping_try_invalidate(str unsigned long ret; unsigned long count = 0; int i; + bool xa_has_values = false; folio_batch_init(&fbatch); while (find_lock_entries(mapping, &index, end, &fbatch, indices)) { @@ -503,8 +486,8 @@ unsigned long mapping_try_invalidate(str /* We rely upon deletion not changing folio->index */ if (xa_is_value(folio)) { - count += invalidate_exceptional_entry(mapping, - indices[i], folio); + xa_has_values = true; + count++; continue; } @@ -522,6 +505,10 @@ unsigned long mapping_try_invalidate(str } count += ret; } + + if (xa_has_values) + clear_shadow_entry(mapping, &fbatch, indices); + folio_batch_remove_exceptionals(&fbatch); folio_batch_release(&fbatch); cond_resched(); @@ -616,6 +603,7 @@ int invalidate_inode_pages2_range(struct int ret = 0; int ret2 = 0; int did_range_unmap = 0; + bool xa_has_values = false; if (mapping_empty(mapping)) return 0; @@ -629,8 +617,9 @@ int invalidate_inode_pages2_range(struct /* We rely upon deletion not changing folio->index */ if (xa_is_value(folio)) { - if (!invalidate_exceptional_entry2(mapping, - indices[i], folio)) + xa_has_values = true; + if (dax_mapping(mapping) && + !dax_invalidate_mapping_entry_sync(mapping, indices[i])) ret = -EBUSY; continue; } @@ -666,6 +655,10 @@ int invalidate_inode_pages2_range(struct ret = ret2; folio_unlock(folio); } + + if (xa_has_values) + clear_shadow_entry(mapping, &fbatch, indices); + folio_batch_remove_exceptionals(&fbatch); folio_batch_release(&fbatch); cond_resched(); _ Patches currently in -mm which might be from yuzhao(a)google.com are mm-truncate-batch-clear-shadow-entries.patch

1 year, 5 months

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+ mm-hugetlb-fix-potential-race-in-__update_and_free_hugetlb_folio.patch added to mm-hotfixes-unstable branch

by Andrew Morton

The patch titled Subject: mm/hugetlb: fix potential race in __update_and_free_hugetlb_folio() has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-hugetlb-fix-potential-race-in-__update_and_free_hugetlb_folio.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Miaohe Lin <linmiaohe(a)huawei.com> Subject: mm/hugetlb: fix potential race in __update_and_free_hugetlb_folio() Date: Mon, 8 Jul 2024 10:51:27 +0800 There is a potential race between __update_and_free_hugetlb_folio() and try_memory_failure_hugetlb(): CPU1 CPU2 __update_and_free_hugetlb_folio try_memory_failure_hugetlb folio_test_hugetlb -- It's still hugetlb folio. folio_clear_hugetlb_hwpoison spin_lock_irq(&hugetlb_lock); __get_huge_page_for_hwpoison folio_set_hugetlb_hwpoison spin_unlock_irq(&hugetlb_lock); spin_lock_irq(&hugetlb_lock); __folio_clear_hugetlb(folio); -- Hugetlb flag is cleared but too late. spin_unlock_irq(&hugetlb_lock); When the above race occurs, raw error page info will be leaked. Even worse, raw error pages won't have hwpoisoned flag set and hit pcplists/buddy. Fix this issue by deferring folio_clear_hugetlb_hwpoison() until __folio_clear_hugetlb() is done. So all raw error pages will have hwpoisoned flag set. Link: https://lkml.kernel.org/r/20240708025127.107713-1-linmiaohe@huawei.com Fixes: 32c877191e02 ("hugetlb: do not clear hugetlb dtor until allocating vmemmap") Signed-off-by: Miaohe Lin <linmiaohe(a)huawei.com> Acked-by: Muchun Song <muchun.song(a)linux.dev> Reviewed-by: Oscar Salvador <osalvador(a)suse.de> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/hugetlb.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) --- a/mm/hugetlb.c~mm-hugetlb-fix-potential-race-in-__update_and_free_hugetlb_folio +++ a/mm/hugetlb.c @@ -1726,13 +1726,6 @@ static void __update_and_free_hugetlb_fo } /* - * Move PageHWPoison flag from head page to the raw error pages, - * which makes any healthy subpages reusable. - */ - if (unlikely(folio_test_hwpoison(folio))) - folio_clear_hugetlb_hwpoison(folio); - - /* * If vmemmap pages were allocated above, then we need to clear the * hugetlb flag under the hugetlb lock. */ @@ -1742,6 +1735,13 @@ static void __update_and_free_hugetlb_fo spin_unlock_irq(&hugetlb_lock); } + /* + * Move PageHWPoison flag from head page to the raw error pages, + * which makes any healthy subpages reusable. + */ + if (unlikely(folio_test_hwpoison(folio))) + folio_clear_hugetlb_hwpoison(folio); + folio_ref_unfreeze(folio, 1); /* _ Patches currently in -mm which might be from linmiaohe(a)huawei.com are mm-hugetlb-fix-potential-race-in-__update_and_free_hugetlb_folio.patch mm-memory-failure-remove-obsolete-mf_msg_different_compound.patch

1 year, 5 months

1
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[PATCH net v2 1/4] ipv4: fix source address selection with route leak

by Nicolas Dichtel

By default, an address assigned to the output interface is selected when the source address is not specified. This is problematic when a route, configured in a vrf, uses an interface from another vrf (aka route leak). The original vrf does not own the selected source address. Let's add a check against the output interface and call the appropriate function to select the source address. CC: stable(a)vger.kernel.org Fixes: 8cbb512c923d ("net: Add source address lookup op for VRF") Signed-off-by: Nicolas Dichtel <nicolas.dichtel(a)6wind.com> --- net/ipv4/fib_semantics.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index f669da98d11d..459082f4936d 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -2270,6 +2270,13 @@ void fib_select_path(struct net *net, struct fib_result *res, fib_select_default(fl4, res); check_saddr: - if (!fl4->saddr) - fl4->saddr = fib_result_prefsrc(net, res); + if (!fl4->saddr) { + struct net_device *l3mdev = dev_get_by_index_rcu(net, fl4->flowi4_l3mdev); + + if (!l3mdev || + l3mdev_master_dev_rcu(FIB_RES_DEV(*res)) == l3mdev) + fl4->saddr = fib_result_prefsrc(net, res); + else + fl4->saddr = inet_select_addr(l3mdev, 0, RT_SCOPE_LINK); + } } -- 2.43.1

1 year, 5 months

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[PATCH net v2 2/4] ipv6: fix source address selection with route leak

by Nicolas Dichtel

By default, an address assigned to the output interface is selected when the source address is not specified. This is problematic when a route, configured in a vrf, uses an interface from another vrf (aka route leak). The original vrf does not own the selected source address. Let's add a check against the output interface and call the appropriate function to select the source address. CC: stable(a)vger.kernel.org Fixes: 0d240e7811c4 ("net: vrf: Implement get_saddr for IPv6") Signed-off-by: Nicolas Dichtel <nicolas.dichtel(a)6wind.com> --- include/net/ip6_route.h | 19 ++++++++++++------- net/ipv6/ip6_output.c | 1 + net/ipv6/route.c | 2 +- 3 files changed, 14 insertions(+), 8 deletions(-) diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h index a18ed24fed94..a7c27f0c6bce 100644 --- a/include/net/ip6_route.h +++ b/include/net/ip6_route.h @@ -127,18 +127,23 @@ void rt6_age_exceptions(struct fib6_info *f6i, struct fib6_gc_args *gc_args, static inline int ip6_route_get_saddr(struct net *net, struct fib6_info *f6i, const struct in6_addr *daddr, - unsigned int prefs, + unsigned int prefs, int l3mdev_index, struct in6_addr *saddr) { + struct net_device *l3mdev; + struct net_device *dev; + bool same_vrf; int err = 0; - if (f6i && f6i->fib6_prefsrc.plen) { + rcu_read_lock(); + l3mdev = dev_get_by_index_rcu(net, l3mdev_index); + dev = f6i ? fib6_info_nh_dev(f6i) : NULL; + same_vrf = l3mdev == NULL || l3mdev_master_dev_rcu(dev) == l3mdev; + if (f6i && f6i->fib6_prefsrc.plen && same_vrf) *saddr = f6i->fib6_prefsrc.addr; - } else { - struct net_device *dev = f6i ? fib6_info_nh_dev(f6i) : NULL; - - err = ipv6_dev_get_saddr(net, dev, daddr, prefs, saddr); - } + else + err = ipv6_dev_get_saddr(net, same_vrf ? dev : l3mdev, daddr, prefs, saddr); + rcu_read_unlock(); return err; } diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 27d8725445e3..784424ac4147 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1124,6 +1124,7 @@ static int ip6_dst_lookup_tail(struct net *net, const struct sock *sk, from = rt ? rcu_dereference(rt->from) : NULL; err = ip6_route_get_saddr(net, from, &fl6->daddr, sk ? READ_ONCE(inet6_sk(sk)->srcprefs) : 0, + fl6->flowi6_l3mdev, &fl6->saddr); rcu_read_unlock(); diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 8d72ca0b086d..c9a9506b714d 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -5689,7 +5689,7 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb, goto nla_put_failure; } else if (dest) { struct in6_addr saddr_buf; - if (ip6_route_get_saddr(net, rt, dest, 0, &saddr_buf) == 0 && + if (ip6_route_get_saddr(net, rt, dest, 0, 0, &saddr_buf) == 0 && nla_put_in6_addr(skb, RTA_PREFSRC, &saddr_buf)) goto nla_put_failure; } -- 2.43.1

1 year, 5 months

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[PATCH net v3 3/4] ipv6: take care of scope when choosing the src addr

by Nicolas Dichtel

When the source address is selected, the scope must be checked. For example, if a loopback address is assigned to the vrf device, it must not be chosen for packets sent outside. CC: stable(a)vger.kernel.org Fixes: afbac6010aec ("net: ipv6: Address selection needs to consider L3 domains") Signed-off-by: Nicolas Dichtel <nicolas.dichtel(a)6wind.com> Reviewed-by: David Ahern <dsahern(a)kernel.org> --- net/ipv6/addrconf.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 5c424a0e7232..4f2c5cc31015 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1873,7 +1873,8 @@ int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, master, &dst, scores, hiscore_idx); - if (scores[hiscore_idx].ifa) + if (scores[hiscore_idx].ifa && + scores[hiscore_idx].scopedist >= 0) goto out; } -- 2.43.1

1 year, 5 months

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Re: Patch "gpiolib: of: add polarity quirk for TSC2005" has been added to the 5.15-stable tree

by Dmitry Torokhov

On Sun, Jul 07, 2024 at 10:58:55AM -0400, Sasha Levin wrote: > This is a note to let you know that I've just added the patch titled > > gpiolib: of: add polarity quirk for TSC2005 > > to the 5.15-stable tree which can be found at: > http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… > > The filename of the patch is: > gpiolib-of-add-polarity-quirk-for-tsc2005.patch > and it can be found in the queue-5.15 subdirectory. > > If you, or anyone else, feels it should not be added to the stable tree, > please let <stable(a)vger.kernel.org> know about it. Sasha, you are picking up a fix for an issue that was there for 7 years (since 2017), that nobody reported, for a device that there probably 1 or 2 users in the world attempt to boot on mainline kernel. For this you are forklifting bunch of other changes as dependencies. I questioned myself when I was sending this change to mainline if it was even worth it, and I am very sure the risks far outweigh the benefits(?) of having this in stable. The same goes for other cherry-picks to other stable branches. Thanks. -- Dmitry

1 year, 5 months

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