Date
May 23, 2025, 11:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.012700] ================================================================== [ 31.012886] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 31.013038] Read of size 1 at addr fff00000c77a2dd0 by task kunit_try_catch/261 [ 31.013191] [ 31.013291] CPU: 0 UID: 0 PID: 261 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7 #1 PREEMPT [ 31.013526] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.013608] Hardware name: linux,dummy-virt (DT) [ 31.013708] Call trace: [ 31.013781] show_stack+0x20/0x38 (C) [ 31.013941] dump_stack_lvl+0x8c/0xd0 [ 31.014095] print_report+0x118/0x608 [ 31.014230] kasan_report+0xdc/0x128 [ 31.014397] __asan_report_load1_noabort+0x20/0x30 [ 31.014568] strcmp+0xc0/0xc8 [ 31.014743] kasan_strings+0x340/0xb00 [ 31.014939] kunit_try_run_case+0x170/0x3f0 [ 31.015088] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.015325] kthread+0x328/0x630 [ 31.015507] ret_from_fork+0x10/0x20 [ 31.015705] [ 31.015791] Allocated by task 261: [ 31.015908] kasan_save_stack+0x3c/0x68 [ 31.016029] kasan_save_track+0x20/0x40 [ 31.016140] kasan_save_alloc_info+0x40/0x58 [ 31.016262] __kasan_kmalloc+0xd4/0xd8 [ 31.016467] __kmalloc_cache_noprof+0x15c/0x3c0 [ 31.016611] kasan_strings+0xc8/0xb00 [ 31.016740] kunit_try_run_case+0x170/0x3f0 [ 31.016905] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.017060] kthread+0x328/0x630 [ 31.017253] ret_from_fork+0x10/0x20 [ 31.017390] [ 31.017496] Freed by task 261: [ 31.017574] kasan_save_stack+0x3c/0x68 [ 31.017681] kasan_save_track+0x20/0x40 [ 31.017790] kasan_save_free_info+0x4c/0x78 [ 31.017900] __kasan_slab_free+0x6c/0x98 [ 31.018016] kfree+0x214/0x3c8 [ 31.018116] kasan_strings+0x24c/0xb00 [ 31.018211] kunit_try_run_case+0x170/0x3f0 [ 31.018306] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.018422] kthread+0x328/0x630 [ 31.018550] ret_from_fork+0x10/0x20 [ 31.018717] [ 31.018789] The buggy address belongs to the object at fff00000c77a2dc0 [ 31.018789] which belongs to the cache kmalloc-32 of size 32 [ 31.019000] The buggy address is located 16 bytes inside of [ 31.019000] freed 32-byte region [fff00000c77a2dc0, fff00000c77a2de0) [ 31.019224] [ 31.019282] The buggy address belongs to the physical page: [ 31.019409] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1077a2 [ 31.019582] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.019796] page_type: f5(slab) [ 31.019945] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 31.020253] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 31.020370] page dumped because: kasan: bad access detected [ 31.020481] [ 31.020540] Memory state around the buggy address: [ 31.020668] fff00000c77a2c80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 31.020801] fff00000c77a2d00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 31.020914] >fff00000c77a2d80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 31.021082] ^ [ 31.021286] fff00000c77a2e00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 31.021507] fff00000c77a2e80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 31.021805] ==================================================================
[ 14.512132] ================================================================== [ 14.513149] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 14.513686] Read of size 1 at addr ffff888102714790 by task kunit_try_catch/278 [ 14.514008] [ 14.514122] CPU: 0 UID: 0 PID: 278 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7 #1 PREEMPT(voluntary) [ 14.514171] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.514184] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.514207] Call Trace: [ 14.514219] <TASK> [ 14.514237] dump_stack_lvl+0x73/0xb0 [ 14.514266] print_report+0xd1/0x650 [ 14.514290] ? __virt_addr_valid+0x1db/0x2d0 [ 14.514326] ? strcmp+0xb0/0xc0 [ 14.514344] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.514368] ? strcmp+0xb0/0xc0 [ 14.514385] kasan_report+0x141/0x180 [ 14.514408] ? strcmp+0xb0/0xc0 [ 14.514430] __asan_report_load1_noabort+0x18/0x20 [ 14.514452] strcmp+0xb0/0xc0 [ 14.514471] kasan_strings+0x431/0xe80 [ 14.514491] ? trace_hardirqs_on+0x37/0xe0 [ 14.514515] ? __pfx_kasan_strings+0x10/0x10 [ 14.514536] ? finish_task_switch.isra.0+0x153/0x700 [ 14.514560] ? __switch_to+0x5d9/0xf60 [ 14.514582] ? dequeue_task_fair+0x156/0x4e0 [ 14.514607] ? __schedule+0x10cc/0x2b30 [ 14.514630] ? __pfx_read_tsc+0x10/0x10 [ 14.514649] ? ktime_get_ts64+0x86/0x230 [ 14.514680] kunit_try_run_case+0x1a5/0x480 [ 14.514705] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.514727] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.514751] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.514782] ? __kthread_parkme+0x82/0x180 [ 14.514805] ? preempt_count_sub+0x50/0x80 [ 14.514828] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.514852] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.514874] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.514897] kthread+0x337/0x6f0 [ 14.514914] ? trace_preempt_on+0x20/0xc0 [ 14.514936] ? __pfx_kthread+0x10/0x10 [ 14.514954] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.514975] ? calculate_sigpending+0x7b/0xa0 [ 14.514997] ? __pfx_kthread+0x10/0x10 [ 14.515015] ret_from_fork+0x41/0x80 [ 14.515036] ? __pfx_kthread+0x10/0x10 [ 14.515053] ret_from_fork_asm+0x1a/0x30 [ 14.515084] </TASK> [ 14.515096] [ 14.522819] Allocated by task 278: [ 14.522988] kasan_save_stack+0x45/0x70 [ 14.523136] kasan_save_track+0x18/0x40 [ 14.523275] kasan_save_alloc_info+0x3b/0x50 [ 14.523493] __kasan_kmalloc+0xb7/0xc0 [ 14.523688] __kmalloc_cache_noprof+0x189/0x420 [ 14.523910] kasan_strings+0xc0/0xe80 [ 14.524087] kunit_try_run_case+0x1a5/0x480 [ 14.524235] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.524421] kthread+0x337/0x6f0 [ 14.524656] ret_from_fork+0x41/0x80 [ 14.524841] ret_from_fork_asm+0x1a/0x30 [ 14.525041] [ 14.525135] Freed by task 278: [ 14.525296] kasan_save_stack+0x45/0x70 [ 14.525520] kasan_save_track+0x18/0x40 [ 14.525692] kasan_save_free_info+0x3f/0x60 [ 14.525888] __kasan_slab_free+0x56/0x70 [ 14.526067] kfree+0x222/0x3f0 [ 14.526212] kasan_strings+0x2aa/0xe80 [ 14.526407] kunit_try_run_case+0x1a5/0x480 [ 14.526619] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.526875] kthread+0x337/0x6f0 [ 14.527005] ret_from_fork+0x41/0x80 [ 14.527141] ret_from_fork_asm+0x1a/0x30 [ 14.527282] [ 14.527364] The buggy address belongs to the object at ffff888102714780 [ 14.527364] which belongs to the cache kmalloc-32 of size 32 [ 14.527739] The buggy address is located 16 bytes inside of [ 14.527739] freed 32-byte region [ffff888102714780, ffff8881027147a0) [ 14.528561] [ 14.528664] The buggy address belongs to the physical page: [ 14.528917] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102714 [ 14.529367] flags: 0x200000000000000(node=0|zone=2) [ 14.529747] page_type: f5(slab) [ 14.529911] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.530163] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.530419] page dumped because: kasan: bad access detected [ 14.530654] [ 14.530755] Memory state around the buggy address: [ 14.530985] ffff888102714680: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.531320] ffff888102714700: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 14.531744] >ffff888102714780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.531994] ^ [ 14.532170] ffff888102714800: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.532528] ffff888102714880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.532805] ==================================================================