Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ife: Fix metalist update behavior Whenever an ife action replace changes the metalist, instead of replacing the old data on the metalist, the current ife code is appending the new metadata. Aside from being innapropriate behavior, this may lead to an unbounded addition of metadata to the metalist which might cause an out of bounds error when running the encode op: [ 138.423369][ C1] ================================================================== [ 138.424317][ C1] BUG: KASAN: slab-out-of-bounds in ife_tlv_meta_encode (net/ife/ife.c:168) [ 138.424906][ C1] Write of size 4 at addr ffff8880077f4ffe by task ife_out_out_bou/255 [ 138.425778][ C1] CPU: 1 UID: 0 PID: 255 Comm: ife_out_out_bou Not tainted 7.0.0-rc1-00169-gfbdfa8da05b6 #624 PREEMPT(full) [ 138.425795][ C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 138.425800][ C1] Call Trace: [ 138.425804][ C1] <IRQ> [ 138.425808][ C1] dump_stack_lvl (lib/dump_stack.c:122) [ 138.425828][ C1] print_report (mm/kasan/report.c:379 mm/kasan/report.c:482) [ 138.425839][ C1] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221) [ 138.425844][ C1] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:95 (discriminator 1) ./include/linux/rcupdate.h:975 (discriminator 1) ./include/linux/mmzone.h:2207 (discriminator 1) arch/x86/mm/physaddr.c:54 (discriminator 1)) [ 138.425853][ C1] ? ife_tlv_meta_encode (net/ife/ife.c:168) [ 138.425859][ C1] kasan_report (mm/kasan/report.c:221 mm/kasan/report.c:597) [ 138.425868][ C1] ? ife_tlv_meta_encode (net/ife/ife.c:168) [ 138.425878][ C1] kasan_check_range (mm/kasan/generic.c:186 (discriminator 1) mm/kasan/generic.c:200 (discriminator 1)) [ 138.425884][ C1] __asan_memset (mm/kasan/shadow.c:84 (discriminator 2)) [ 138.425889][ C1] ife_tlv_meta_encode (net/ife/ife.c:168) [ 138.425893][ C1] ? ife_tlv_meta_encode (net/ife/ife.c:171) [ 138.425898][ C1] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221) [ 138.425903][ C1] ife_encode_meta_u16 (net/sched/act_ife.c:57) [ 138.425910][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 138.425916][ C1] ? __asan_memcpy (mm/kasan/shadow.c:105 (discriminator 3)) [ 138.425921][ C1] ? __pfx_ife_encode_meta_u16 (net/sched/act_ife.c:45) [ 138.425927][ C1] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221) [ 138.425931][ C1] tcf_ife_act (net/sched/act_ife.c:847 net/sched/act_ife.c:879) To solve this issue, fix the replace behavior by adding the metalist to the ife rcu data structure.
Product status
aa9fd9a325d51fa0b11153b03b8fefff569fa955 (git) before 56ade7ddea6ce605552341785d08e365c3f61861
aa9fd9a325d51fa0b11153b03b8fefff569fa955 (git) before 5b1449301ca070814d866990b46f48d3f39ea4ee
aa9fd9a325d51fa0b11153b03b8fefff569fa955 (git) before 91a89d3bdc2f63d983adc13d1771631663c5dc1b
aa9fd9a325d51fa0b11153b03b8fefff569fa955 (git) before cd888c3966672239f2e0707b846a5a936ac9038a
aa9fd9a325d51fa0b11153b03b8fefff569fa955 (git) before 691866c4cca54dc4df762276b49e89b36e046947
aa9fd9a325d51fa0b11153b03b8fefff569fa955 (git) before e2cedd400c3ec0302ffca2490e8751772906ac23
4.15
Any version before 4.15
6.1.167 (semver)
6.6.130 (semver)
6.12.77 (semver)
6.18.17 (semver)
6.19.7 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/56ade7ddea6ce605552341785d08e365c3f61861
git.kernel.org/...c/5b1449301ca070814d866990b46f48d3f39ea4ee
git.kernel.org/...c/91a89d3bdc2f63d983adc13d1771631663c5dc1b
git.kernel.org/...c/cd888c3966672239f2e0707b846a5a936ac9038a
git.kernel.org/...c/691866c4cca54dc4df762276b49e89b36e046947
git.kernel.org/...c/e2cedd400c3ec0302ffca2490e8751772906ac23