Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: tracing: Limit access to parser->buffer when trace_get_user failed When the length of the string written to set_ftrace_filter exceeds FTRACE_BUFF_MAX, the following KASAN alarm will be triggered: BUG: KASAN: slab-out-of-bounds in strsep+0x18c/0x1b0 Read of size 1 at addr ffff0000d00bd5ba by task ash/165 CPU: 1 UID: 0 PID: 165 Comm: ash Not tainted 6.16.0-g6bcdbd62bd56-dirty Hardware name: linux,dummy-virt (DT) Call trace: show_stack+0x34/0x50 (C) dump_stack_lvl+0xa0/0x158 print_address_description.constprop.0+0x88/0x398 print_report+0xb0/0x280 kasan_report+0xa4/0xf0 __asan_report_load1_noabort+0x20/0x30 strsep+0x18c/0x1b0 ftrace_process_regex.isra.0+0x100/0x2d8 ftrace_regex_release+0x484/0x618 __fput+0x364/0xa58 ____fput+0x28/0x40 task_work_run+0x154/0x278 do_notify_resume+0x1f0/0x220 el0_svc+0xec/0xf0 el0t_64_sync_handler+0xa0/0xe8 el0t_64_sync+0x1ac/0x1b0 The reason is that trace_get_user will fail when processing a string longer than FTRACE_BUFF_MAX, but not set the end of parser->buffer to 0. Then an OOB access will be triggered in ftrace_regex_release-> ftrace_process_regex->strsep->strpbrk. We can solve this problem by limiting access to parser->buffer when trace_get_user failed.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 634684d79733124f7470b226b0f42aada4426b07 before b842ef39c2ad6156c13afdec25ecc6792a9b67b9; affected 8c9af478c06bb1ab1422f90d8ecbc53defd44bc3 before 41b838420457802f21918df66764b6fbf829d330; affected 8c9af478c06bb1ab1422f90d8ecbc53defd44bc3 before 418b448e1d7470da9d4d4797f71782595ee69c49; affected 8c9af478c06bb1ab1422f90d8ecbc53defd44bc3 before 58ff8064cb4c7eddac4da1a59da039ead586950a; affected 8c9af478c06bb1ab1422f90d8ecbc53defd44bc3 before d0c68045b8b0f3737ed7bd6b8c83b7887014adee; affected 8c9af478c06bb1ab1422f90d8ecbc53defd44bc3 before 3079517a5ba80901fe828a06998da64b9b8749be; affected 8c9af478c06bb1ab1422f90d8ecbc53defd44bc3 before 6a909ea83f226803ea0e718f6e88613df9234d58; affected 24cd31752f47699b89b4b3471155c8e599a1a23a; affected e9cb474de7ff7a970c2a3951c12ec7e3113c0c35; affected 6ab671191f64b0da7d547e2ad4dc199ca7e5b558; affected 3d9281a4ac7171c808f9507f0937eb236b353905; affected 0b641b25870f02e2423e494365fc5243cc1e2759; affected ffd51dbfd2900e50c71b5c069fe407957e52d61f; affected cdd107d7f18158d966c2bc136204fe826dac445c; affected 5.10.36 before 5.10.241; affected 4.4.269 before 4.5; affected 4.9.269 before 4.10; affected 4.14.233 before 4.15; affected 4.19.191 before 4.20; affected 5.4.118 before 5.5; affected 5.11.20 before 5.12; affected 5.12.3 before 5.13 |
| Linux / Linux | affected 5.13; unaffected 0 before 5.13; unaffected 5.10.241 through 5.10.*; unaffected 5.15.190 through 5.15.*; unaffected 6.1.149 through 6.1.*; unaffected 6.6.103 through 6.6.*; unaffected 6.12.44 through 6.12.*; unaffected 6.16.4 through 6.16.*; unaffected 6.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b842ef39c2ad6156c13afdec25ecc6792a9b67b9
- https://git.kernel.org/stable/c/41b838420457802f21918df66764b6fbf829d330
- https://git.kernel.org/stable/c/418b448e1d7470da9d4d4797f71782595ee69c49
- https://git.kernel.org/stable/c/58ff8064cb4c7eddac4da1a59da039ead586950a
- https://git.kernel.org/stable/c/d0c68045b8b0f3737ed7bd6b8c83b7887014adee
- https://git.kernel.org/stable/c/3079517a5ba80901fe828a06998da64b9b8749be
- https://git.kernel.org/stable/c/6a909ea83f226803ea0e718f6e88613df9234d58
ADP enrichment
No English description supplied.
No English description supplied.
No English description supplied.
No references supplied.