Date
June 25, 2025, 8:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 28.882155] ================================================================== [ 28.882207] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 28.882263] Read of size 1 at addr fff00000c785da90 by task kunit_try_catch/271 [ 28.882314] [ 28.882351] CPU: 0 UID: 0 PID: 271 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250625 #1 PREEMPT [ 28.882460] Tainted: [B]=BAD_PAGE, [N]=TEST [ 28.882490] Hardware name: linux,dummy-virt (DT) [ 28.882524] Call trace: [ 28.882905] show_stack+0x20/0x38 (C) [ 28.883008] dump_stack_lvl+0x8c/0xd0 [ 28.883103] print_report+0x118/0x608 [ 28.883156] kasan_report+0xdc/0x128 [ 28.883223] __asan_report_load1_noabort+0x20/0x30 [ 28.883307] strcmp+0xc0/0xc8 [ 28.883350] kasan_strings+0x340/0xb00 [ 28.883415] kunit_try_run_case+0x170/0x3f0 [ 28.883465] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.883519] kthread+0x328/0x630 [ 28.883562] ret_from_fork+0x10/0x20 [ 28.883791] [ 28.883846] Allocated by task 271: [ 28.883912] kasan_save_stack+0x3c/0x68 [ 28.883960] kasan_save_track+0x20/0x40 [ 28.884033] kasan_save_alloc_info+0x40/0x58 [ 28.884252] __kasan_kmalloc+0xd4/0xd8 [ 28.884341] __kmalloc_cache_noprof+0x16c/0x3c0 [ 28.884383] kasan_strings+0xc8/0xb00 [ 28.884471] kunit_try_run_case+0x170/0x3f0 [ 28.884558] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.884604] kthread+0x328/0x630 [ 28.884664] ret_from_fork+0x10/0x20 [ 28.884759] [ 28.884782] Freed by task 271: [ 28.884811] kasan_save_stack+0x3c/0x68 [ 28.884859] kasan_save_track+0x20/0x40 [ 28.884899] kasan_save_free_info+0x4c/0x78 [ 28.884956] __kasan_slab_free+0x6c/0x98 [ 28.884996] kfree+0x214/0x3c8 [ 28.885030] kasan_strings+0x24c/0xb00 [ 28.885068] kunit_try_run_case+0x170/0x3f0 [ 28.885268] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.885325] kthread+0x328/0x630 [ 28.885359] ret_from_fork+0x10/0x20 [ 28.885408] [ 28.885866] The buggy address belongs to the object at fff00000c785da80 [ 28.885866] which belongs to the cache kmalloc-32 of size 32 [ 28.885934] The buggy address is located 16 bytes inside of [ 28.885934] freed 32-byte region [fff00000c785da80, fff00000c785daa0) [ 28.886020] [ 28.886079] The buggy address belongs to the physical page: [ 28.886183] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10785d [ 28.886252] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 28.886493] page_type: f5(slab) [ 28.886676] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 28.886776] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 28.886849] page dumped because: kasan: bad access detected [ 28.886929] [ 28.887002] Memory state around the buggy address: [ 28.887094] fff00000c785d980: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 28.887158] fff00000c785da00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 28.887242] >fff00000c785da80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 28.887333] ^ [ 28.887368] fff00000c785db00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 28.887423] fff00000c785db80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 28.887465] ==================================================================
[ 23.737462] ================================================================== [ 23.738447] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 23.738708] Read of size 1 at addr ffff888102596f90 by task kunit_try_catch/288 [ 23.739037] [ 23.739157] CPU: 0 UID: 0 PID: 288 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250625 #1 PREEMPT(voluntary) [ 23.739228] Tainted: [B]=BAD_PAGE, [N]=TEST [ 23.739241] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 23.739262] Call Trace: [ 23.739274] <TASK> [ 23.739292] dump_stack_lvl+0x73/0xb0 [ 23.739316] print_report+0xd1/0x650 [ 23.739338] ? __virt_addr_valid+0x1db/0x2d0 [ 23.739362] ? strcmp+0xb0/0xc0 [ 23.739381] ? kasan_complete_mode_report_info+0x64/0x200 [ 23.739406] ? strcmp+0xb0/0xc0 [ 23.739424] kasan_report+0x141/0x180 [ 23.739444] ? strcmp+0xb0/0xc0 [ 23.739466] __asan_report_load1_noabort+0x18/0x20 [ 23.739490] strcmp+0xb0/0xc0 [ 23.739509] kasan_strings+0x431/0xe80 [ 23.739528] ? trace_hardirqs_on+0x37/0xe0 [ 23.739550] ? __pfx_kasan_strings+0x10/0x10 [ 23.739569] ? finish_task_switch.isra.0+0x153/0x700 [ 23.739591] ? __switch_to+0x47/0xf50 [ 23.739615] ? __schedule+0x10cc/0x2b60 [ 23.739640] ? __pfx_read_tsc+0x10/0x10 [ 23.739660] ? ktime_get_ts64+0x86/0x230 [ 23.739684] kunit_try_run_case+0x1a5/0x480 [ 23.739709] ? __pfx_kunit_try_run_case+0x10/0x10 [ 23.739838] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 23.739860] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 23.739884] ? __kthread_parkme+0x82/0x180 [ 23.739904] ? preempt_count_sub+0x50/0x80 [ 23.739925] ? __pfx_kunit_try_run_case+0x10/0x10 [ 23.739959] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 23.739982] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 23.740006] kthread+0x337/0x6f0 [ 23.740024] ? trace_preempt_on+0x20/0xc0 [ 23.740044] ? __pfx_kthread+0x10/0x10 [ 23.740064] ? _raw_spin_unlock_irq+0x47/0x80 [ 23.740086] ? calculate_sigpending+0x7b/0xa0 [ 23.740108] ? __pfx_kthread+0x10/0x10 [ 23.740128] ret_from_fork+0x116/0x1d0 [ 23.740146] ? __pfx_kthread+0x10/0x10 [ 23.740164] ret_from_fork_asm+0x1a/0x30 [ 23.740193] </TASK> [ 23.740203] [ 23.747609] Allocated by task 288: [ 23.747798] kasan_save_stack+0x45/0x70 [ 23.748136] kasan_save_track+0x18/0x40 [ 23.748361] kasan_save_alloc_info+0x3b/0x50 [ 23.748648] __kasan_kmalloc+0xb7/0xc0 [ 23.748783] __kmalloc_cache_noprof+0x189/0x420 [ 23.748926] kasan_strings+0xc0/0xe80 [ 23.749110] kunit_try_run_case+0x1a5/0x480 [ 23.749567] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 23.750053] kthread+0x337/0x6f0 [ 23.750236] ret_from_fork+0x116/0x1d0 [ 23.750439] ret_from_fork_asm+0x1a/0x30 [ 23.750632] [ 23.750727] Freed by task 288: [ 23.750991] kasan_save_stack+0x45/0x70 [ 23.751190] kasan_save_track+0x18/0x40 [ 23.751346] kasan_save_free_info+0x3f/0x60 [ 23.751484] __kasan_slab_free+0x56/0x70 [ 23.751611] kfree+0x222/0x3f0 [ 23.751750] kasan_strings+0x2aa/0xe80 [ 23.751926] kunit_try_run_case+0x1a5/0x480 [ 23.752164] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 23.752610] kthread+0x337/0x6f0 [ 23.752850] ret_from_fork+0x116/0x1d0 [ 23.753032] ret_from_fork_asm+0x1a/0x30 [ 23.753286] [ 23.753375] The buggy address belongs to the object at ffff888102596f80 [ 23.753375] which belongs to the cache kmalloc-32 of size 32 [ 23.753961] The buggy address is located 16 bytes inside of [ 23.753961] freed 32-byte region [ffff888102596f80, ffff888102596fa0) [ 23.754309] [ 23.754400] The buggy address belongs to the physical page: [ 23.754645] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102596 [ 23.755101] flags: 0x200000000000000(node=0|zone=2) [ 23.755516] page_type: f5(slab) [ 23.755715] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 23.756141] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 23.756457] page dumped because: kasan: bad access detected [ 23.756688] [ 23.756756] Memory state around the buggy address: [ 23.757137] ffff888102596e80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 23.757425] ffff888102596f00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 23.757697] >ffff888102596f80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 23.758011] ^ [ 23.758138] ffff888102597000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.758396] ffff888102597080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.758721] ==================================================================