Date
July 1, 2025, 3:08 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.217511] ================================================================== [ 19.218021] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 19.218078] Read of size 1 at addr fff00000c57eabd0 by task kunit_try_catch/260 [ 19.218490] [ 19.218597] CPU: 0 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.218776] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.218837] Hardware name: linux,dummy-virt (DT) [ 19.219203] Call trace: [ 19.219272] show_stack+0x20/0x38 (C) [ 19.219368] dump_stack_lvl+0x8c/0xd0 [ 19.219496] print_report+0x118/0x608 [ 19.219585] kasan_report+0xdc/0x128 [ 19.219744] __asan_report_load1_noabort+0x20/0x30 [ 19.219968] kasan_strings+0x95c/0xb00 [ 19.220190] kunit_try_run_case+0x170/0x3f0 [ 19.220297] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.220407] kthread+0x328/0x630 [ 19.220550] ret_from_fork+0x10/0x20 [ 19.220644] [ 19.220705] Allocated by task 260: [ 19.220806] kasan_save_stack+0x3c/0x68 [ 19.220865] kasan_save_track+0x20/0x40 [ 19.220942] kasan_save_alloc_info+0x40/0x58 [ 19.221124] __kasan_kmalloc+0xd4/0xd8 [ 19.221332] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.221419] kasan_strings+0xc8/0xb00 [ 19.221543] kunit_try_run_case+0x170/0x3f0 [ 19.221640] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.221768] kthread+0x328/0x630 [ 19.221807] ret_from_fork+0x10/0x20 [ 19.221868] [ 19.221890] Freed by task 260: [ 19.222048] kasan_save_stack+0x3c/0x68 [ 19.222255] kasan_save_track+0x20/0x40 [ 19.222326] kasan_save_free_info+0x4c/0x78 [ 19.222682] __kasan_slab_free+0x6c/0x98 [ 19.222787] kfree+0x214/0x3c8 [ 19.222962] kasan_strings+0x24c/0xb00 [ 19.223070] kunit_try_run_case+0x170/0x3f0 [ 19.223199] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.223248] kthread+0x328/0x630 [ 19.223300] ret_from_fork+0x10/0x20 [ 19.223341] [ 19.223372] The buggy address belongs to the object at fff00000c57eabc0 [ 19.223372] which belongs to the cache kmalloc-32 of size 32 [ 19.223443] The buggy address is located 16 bytes inside of [ 19.223443] freed 32-byte region [fff00000c57eabc0, fff00000c57eabe0) [ 19.223517] [ 19.223546] The buggy address belongs to the physical page: [ 19.223868] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1057ea [ 19.223996] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.224067] page_type: f5(slab) [ 19.224110] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.224308] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.224506] page dumped because: kasan: bad access detected [ 19.224689] [ 19.224748] Memory state around the buggy address: [ 19.224889] fff00000c57eaa80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.224972] fff00000c57eab00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.225062] >fff00000c57eab80: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.225262] ^ [ 19.225456] fff00000c57eac00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.225624] fff00000c57eac80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.225693] ==================================================================
[ 13.591381] ================================================================== [ 13.591751] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 13.592209] Read of size 1 at addr ffff8881033c1910 by task kunit_try_catch/276 [ 13.592752] [ 13.592851] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.592896] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.592908] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.592929] Call Trace: [ 13.592942] <TASK> [ 13.592961] dump_stack_lvl+0x73/0xb0 [ 13.592990] print_report+0xd1/0x650 [ 13.593013] ? __virt_addr_valid+0x1db/0x2d0 [ 13.593048] ? kasan_strings+0xcbc/0xe80 [ 13.593067] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.593089] ? kasan_strings+0xcbc/0xe80 [ 13.593109] kasan_report+0x141/0x180 [ 13.593130] ? kasan_strings+0xcbc/0xe80 [ 13.593155] __asan_report_load1_noabort+0x18/0x20 [ 13.593178] kasan_strings+0xcbc/0xe80 [ 13.593198] ? trace_hardirqs_on+0x37/0xe0 [ 13.593222] ? __pfx_kasan_strings+0x10/0x10 [ 13.593241] ? finish_task_switch.isra.0+0x153/0x700 [ 13.593262] ? __switch_to+0x47/0xf50 [ 13.593288] ? __schedule+0x10cc/0x2b60 [ 13.593311] ? __pfx_read_tsc+0x10/0x10 [ 13.593334] ? ktime_get_ts64+0x86/0x230 [ 13.593358] kunit_try_run_case+0x1a5/0x480 [ 13.593383] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.593404] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.593427] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.593449] ? __kthread_parkme+0x82/0x180 [ 13.593469] ? preempt_count_sub+0x50/0x80 [ 13.593491] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.593514] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.593536] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.593559] kthread+0x337/0x6f0 [ 13.593577] ? trace_preempt_on+0x20/0xc0 [ 13.593598] ? __pfx_kthread+0x10/0x10 [ 13.593618] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.593638] ? calculate_sigpending+0x7b/0xa0 [ 13.593661] ? __pfx_kthread+0x10/0x10 [ 13.593682] ret_from_fork+0x116/0x1d0 [ 13.593700] ? __pfx_kthread+0x10/0x10 [ 13.593720] ret_from_fork_asm+0x1a/0x30 [ 13.593749] </TASK> [ 13.593760] [ 13.601632] Allocated by task 276: [ 13.601798] kasan_save_stack+0x45/0x70 [ 13.601991] kasan_save_track+0x18/0x40 [ 13.602159] kasan_save_alloc_info+0x3b/0x50 [ 13.602362] __kasan_kmalloc+0xb7/0xc0 [ 13.602807] __kmalloc_cache_noprof+0x189/0x420 [ 13.603052] kasan_strings+0xc0/0xe80 [ 13.603201] kunit_try_run_case+0x1a5/0x480 [ 13.603409] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.603619] kthread+0x337/0x6f0 [ 13.603863] ret_from_fork+0x116/0x1d0 [ 13.604051] ret_from_fork_asm+0x1a/0x30 [ 13.604220] [ 13.604289] Freed by task 276: [ 13.604402] kasan_save_stack+0x45/0x70 [ 13.604594] kasan_save_track+0x18/0x40 [ 13.604787] kasan_save_free_info+0x3f/0x60 [ 13.605001] __kasan_slab_free+0x56/0x70 [ 13.605143] kfree+0x222/0x3f0 [ 13.605487] kasan_strings+0x2aa/0xe80 [ 13.605720] kunit_try_run_case+0x1a5/0x480 [ 13.605926] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.606164] kthread+0x337/0x6f0 [ 13.606318] ret_from_fork+0x116/0x1d0 [ 13.606479] ret_from_fork_asm+0x1a/0x30 [ 13.606656] [ 13.606747] The buggy address belongs to the object at ffff8881033c1900 [ 13.606747] which belongs to the cache kmalloc-32 of size 32 [ 13.607249] The buggy address is located 16 bytes inside of [ 13.607249] freed 32-byte region [ffff8881033c1900, ffff8881033c1920) [ 13.607803] [ 13.608091] The buggy address belongs to the physical page: [ 13.608295] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1033c1 [ 13.608709] flags: 0x200000000000000(node=0|zone=2) [ 13.608916] page_type: f5(slab) [ 13.609074] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.609409] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.609782] page dumped because: kasan: bad access detected [ 13.610002] [ 13.610083] Memory state around the buggy address: [ 13.610238] ffff8881033c1800: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.610452] ffff8881033c1880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.610682] >ffff8881033c1900: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.611046] ^ [ 13.611228] ffff8881033c1980: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.611554] ffff8881033c1a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.611978] ==================================================================