Date
May 29, 2025, 7:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 24.694265] ================================================================== [ 24.695464] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 24.695736] Read of size 1 at addr fff00000c7876250 by task kunit_try_catch/259 [ 24.696152] [ 24.696705] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250529 #1 PREEMPT [ 24.697182] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.697274] Hardware name: linux,dummy-virt (DT) [ 24.697362] Call trace: [ 24.697630] show_stack+0x20/0x38 (C) [ 24.697903] dump_stack_lvl+0x8c/0xd0 [ 24.698286] print_report+0x118/0x608 [ 24.698423] kasan_report+0xdc/0x128 [ 24.698552] __asan_report_load1_noabort+0x20/0x30 [ 24.698670] strlen+0xa8/0xb0 [ 24.698759] kasan_strings+0x418/0xb00 [ 24.698880] kunit_try_run_case+0x170/0x3f0 [ 24.699002] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.699676] kthread+0x328/0x630 [ 24.700274] ret_from_fork+0x10/0x20 [ 24.700582] [ 24.700697] Allocated by task 259: [ 24.700894] kasan_save_stack+0x3c/0x68 [ 24.701007] kasan_save_track+0x20/0x40 [ 24.701354] kasan_save_alloc_info+0x40/0x58 [ 24.701472] __kasan_kmalloc+0xd4/0xd8 [ 24.701780] __kmalloc_cache_noprof+0x15c/0x3c0 [ 24.701887] kasan_strings+0xc8/0xb00 [ 24.702246] kunit_try_run_case+0x170/0x3f0 [ 24.702584] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.702955] kthread+0x328/0x630 [ 24.703058] ret_from_fork+0x10/0x20 [ 24.703368] [ 24.703517] Freed by task 259: [ 24.703851] kasan_save_stack+0x3c/0x68 [ 24.704009] kasan_save_track+0x20/0x40 [ 24.704541] kasan_save_free_info+0x4c/0x78 [ 24.704707] __kasan_slab_free+0x6c/0x98 [ 24.704812] kfree+0x214/0x3c8 [ 24.704917] kasan_strings+0x24c/0xb00 [ 24.705011] kunit_try_run_case+0x170/0x3f0 [ 24.705112] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.705804] kthread+0x328/0x630 [ 24.705936] ret_from_fork+0x10/0x20 [ 24.706109] [ 24.706303] The buggy address belongs to the object at fff00000c7876240 [ 24.706303] which belongs to the cache kmalloc-32 of size 32 [ 24.706653] The buggy address is located 16 bytes inside of [ 24.706653] freed 32-byte region [fff00000c7876240, fff00000c7876260) [ 24.706788] [ 24.706842] The buggy address belongs to the physical page: [ 24.706913] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107876 [ 24.707041] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 24.707177] page_type: f5(slab) [ 24.707284] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 24.707844] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 24.708254] page dumped because: kasan: bad access detected [ 24.708594] [ 24.708681] Memory state around the buggy address: [ 24.708911] fff00000c7876100: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 24.709161] fff00000c7876180: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 24.709424] >fff00000c7876200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 24.709608] ^ [ 24.710328] fff00000c7876280: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 24.710875] fff00000c7876300: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 24.710985] ==================================================================
[ 12.831323] ================================================================== [ 12.831755] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 12.832248] Read of size 1 at addr ffff888102fab010 by task kunit_try_catch/276 [ 12.832963] [ 12.833093] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250529 #1 PREEMPT(voluntary) [ 12.833143] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.833156] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.833178] Call Trace: [ 12.833195] <TASK> [ 12.833210] dump_stack_lvl+0x73/0xb0 [ 12.833237] print_report+0xd1/0x650 [ 12.833260] ? __virt_addr_valid+0x1db/0x2d0 [ 12.833282] ? strlen+0x8f/0xb0 [ 12.833300] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.833323] ? strlen+0x8f/0xb0 [ 12.833343] kasan_report+0x141/0x180 [ 12.833366] ? strlen+0x8f/0xb0 [ 12.833390] __asan_report_load1_noabort+0x18/0x20 [ 12.833411] strlen+0x8f/0xb0 [ 12.833431] kasan_strings+0x57b/0xe80 [ 12.833451] ? trace_hardirqs_on+0x37/0xe0 [ 12.833474] ? __pfx_kasan_strings+0x10/0x10 [ 12.833494] ? finish_task_switch.isra.0+0x153/0x700 [ 12.833539] ? __switch_to+0x47/0xf50 [ 12.833564] ? __schedule+0x10cc/0x2b60 [ 12.833587] ? __pfx_read_tsc+0x10/0x10 [ 12.833620] ? ktime_get_ts64+0x86/0x230 [ 12.833645] kunit_try_run_case+0x1a5/0x480 [ 12.833668] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.833688] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.833713] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.833738] ? __kthread_parkme+0x82/0x180 [ 12.833759] ? preempt_count_sub+0x50/0x80 [ 12.833782] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.833889] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.833915] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.833941] kthread+0x337/0x6f0 [ 12.833962] ? trace_preempt_on+0x20/0xc0 [ 12.833985] ? __pfx_kthread+0x10/0x10 [ 12.834006] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.834029] ? calculate_sigpending+0x7b/0xa0 [ 12.834052] ? __pfx_kthread+0x10/0x10 [ 12.834074] ret_from_fork+0x116/0x1d0 [ 12.834093] ? __pfx_kthread+0x10/0x10 [ 12.834115] ret_from_fork_asm+0x1a/0x30 [ 12.834145] </TASK> [ 12.834155] [ 12.845442] Allocated by task 276: [ 12.845624] kasan_save_stack+0x45/0x70 [ 12.845781] kasan_save_track+0x18/0x40 [ 12.845959] kasan_save_alloc_info+0x3b/0x50 [ 12.846194] __kasan_kmalloc+0xb7/0xc0 [ 12.846364] __kmalloc_cache_noprof+0x189/0x420 [ 12.846556] kasan_strings+0xc0/0xe80 [ 12.846756] kunit_try_run_case+0x1a5/0x480 [ 12.847104] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.847303] kthread+0x337/0x6f0 [ 12.847469] ret_from_fork+0x116/0x1d0 [ 12.847671] ret_from_fork_asm+0x1a/0x30 [ 12.847859] [ 12.848134] Freed by task 276: [ 12.848320] kasan_save_stack+0x45/0x70 [ 12.848495] kasan_save_track+0x18/0x40 [ 12.848685] kasan_save_free_info+0x3f/0x60 [ 12.848960] __kasan_slab_free+0x56/0x70 [ 12.849175] kfree+0x222/0x3f0 [ 12.849296] kasan_strings+0x2aa/0xe80 [ 12.849432] kunit_try_run_case+0x1a5/0x480 [ 12.849626] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.849895] kthread+0x337/0x6f0 [ 12.850050] ret_from_fork+0x116/0x1d0 [ 12.850185] ret_from_fork_asm+0x1a/0x30 [ 12.850347] [ 12.850443] The buggy address belongs to the object at ffff888102fab000 [ 12.850443] which belongs to the cache kmalloc-32 of size 32 [ 12.851009] The buggy address is located 16 bytes inside of [ 12.851009] freed 32-byte region [ffff888102fab000, ffff888102fab020) [ 12.851403] [ 12.851531] The buggy address belongs to the physical page: [ 12.851858] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102fab [ 12.852273] flags: 0x200000000000000(node=0|zone=2) [ 12.852442] page_type: f5(slab) [ 12.852623] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 12.853113] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 12.853515] page dumped because: kasan: bad access detected [ 12.853729] [ 12.853870] Memory state around the buggy address: [ 12.854093] ffff888102faaf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.854372] ffff888102faaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.854713] >ffff888102fab000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 12.855057] ^ [ 12.855214] ffff888102fab080: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 12.855514] ffff888102fab100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 12.856002] ==================================================================