Date
July 3, 2025, 11:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.614422] ================================================================== [ 22.614535] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 22.614677] Read of size 1 at addr fff00000c6376cd0 by task kunit_try_catch/259 [ 22.614789] [ 22.614861] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 22.615049] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.615108] Hardware name: linux,dummy-virt (DT) [ 22.615182] Call trace: [ 22.615239] show_stack+0x20/0x38 (C) [ 22.615363] dump_stack_lvl+0x8c/0xd0 [ 22.615489] print_report+0x118/0x608 [ 22.615651] kasan_report+0xdc/0x128 [ 22.615783] __asan_report_load1_noabort+0x20/0x30 [ 22.615880] strnlen+0x80/0x88 [ 22.615981] kasan_strings+0x478/0xb00 [ 22.616093] kunit_try_run_case+0x170/0x3f0 [ 22.616190] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.616301] kthread+0x328/0x630 [ 22.616397] ret_from_fork+0x10/0x20 [ 22.616520] [ 22.616569] Allocated by task 259: [ 22.616687] kasan_save_stack+0x3c/0x68 [ 22.616790] kasan_save_track+0x20/0x40 [ 22.616892] kasan_save_alloc_info+0x40/0x58 [ 22.617005] __kasan_kmalloc+0xd4/0xd8 [ 22.617163] __kmalloc_cache_noprof+0x16c/0x3c0 [ 22.617287] kasan_strings+0xc8/0xb00 [ 22.617366] kunit_try_run_case+0x170/0x3f0 [ 22.617445] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.617536] kthread+0x328/0x630 [ 22.617606] ret_from_fork+0x10/0x20 [ 22.617720] [ 22.617800] Freed by task 259: [ 22.617973] kasan_save_stack+0x3c/0x68 [ 22.618193] kasan_save_track+0x20/0x40 [ 22.618498] kasan_save_free_info+0x4c/0x78 [ 22.618596] __kasan_slab_free+0x6c/0x98 [ 22.618689] kfree+0x214/0x3c8 [ 22.618792] kasan_strings+0x24c/0xb00 [ 22.618871] kunit_try_run_case+0x170/0x3f0 [ 22.618993] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.619154] kthread+0x328/0x630 [ 22.619271] ret_from_fork+0x10/0x20 [ 22.619394] [ 22.619443] The buggy address belongs to the object at fff00000c6376cc0 [ 22.619443] which belongs to the cache kmalloc-32 of size 32 [ 22.619583] The buggy address is located 16 bytes inside of [ 22.619583] freed 32-byte region [fff00000c6376cc0, fff00000c6376ce0) [ 22.619734] [ 22.619787] The buggy address belongs to the physical page: [ 22.619861] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106376 [ 22.619988] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.620120] page_type: f5(slab) [ 22.620212] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 22.620334] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 22.620438] page dumped because: kasan: bad access detected [ 22.620537] [ 22.620627] Memory state around the buggy address: [ 22.620750] fff00000c6376b80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 22.620860] fff00000c6376c00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 22.620967] >fff00000c6376c80: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 22.621067] ^ [ 22.621154] fff00000c6376d00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 22.621258] fff00000c6376d80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 22.621345] ==================================================================
[ 13.589109] ================================================================== [ 13.589924] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 13.590133] Read of size 1 at addr ffff8881039c45d0 by task kunit_try_catch/276 [ 13.590450] [ 13.590666] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.590711] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.590723] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.590742] Call Trace: [ 13.590758] <TASK> [ 13.590772] dump_stack_lvl+0x73/0xb0 [ 13.590822] print_report+0xd1/0x650 [ 13.590844] ? __virt_addr_valid+0x1db/0x2d0 [ 13.590865] ? strnlen+0x73/0x80 [ 13.590882] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.590905] ? strnlen+0x73/0x80 [ 13.590922] kasan_report+0x141/0x180 [ 13.590943] ? strnlen+0x73/0x80 [ 13.590965] __asan_report_load1_noabort+0x18/0x20 [ 13.590988] strnlen+0x73/0x80 [ 13.591006] kasan_strings+0x615/0xe80 [ 13.591025] ? trace_hardirqs_on+0x37/0xe0 [ 13.591047] ? __pfx_kasan_strings+0x10/0x10 [ 13.591068] ? __kasan_check_write+0x18/0x20 [ 13.591086] ? queued_spin_lock_slowpath+0x116/0xb40 [ 13.591108] ? irqentry_exit+0x2a/0x60 [ 13.591139] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 13.591162] ? trace_hardirqs_on+0x37/0xe0 [ 13.591183] ? __pfx_read_tsc+0x10/0x10 [ 13.591204] ? ktime_get_ts64+0x86/0x230 [ 13.591227] kunit_try_run_case+0x1a5/0x480 [ 13.591251] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.591274] ? queued_spin_lock_slowpath+0x116/0xb40 [ 13.591296] ? __kthread_parkme+0x82/0x180 [ 13.591335] ? preempt_count_sub+0x50/0x80 [ 13.591374] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.591398] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.591420] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.591443] kthread+0x337/0x6f0 [ 13.591462] ? trace_preempt_on+0x20/0xc0 [ 13.591482] ? __pfx_kthread+0x10/0x10 [ 13.591503] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.591523] ? calculate_sigpending+0x7b/0xa0 [ 13.591545] ? __pfx_kthread+0x10/0x10 [ 13.591566] ret_from_fork+0x116/0x1d0 [ 13.591583] ? __pfx_kthread+0x10/0x10 [ 13.591604] ret_from_fork_asm+0x1a/0x30 [ 13.591633] </TASK> [ 13.591643] [ 13.600136] Allocated by task 276: [ 13.600267] kasan_save_stack+0x45/0x70 [ 13.600486] kasan_save_track+0x18/0x40 [ 13.600678] kasan_save_alloc_info+0x3b/0x50 [ 13.600890] __kasan_kmalloc+0xb7/0xc0 [ 13.601279] __kmalloc_cache_noprof+0x189/0x420 [ 13.601447] kasan_strings+0xc0/0xe80 [ 13.601582] kunit_try_run_case+0x1a5/0x480 [ 13.601787] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.602039] kthread+0x337/0x6f0 [ 13.602505] ret_from_fork+0x116/0x1d0 [ 13.602706] ret_from_fork_asm+0x1a/0x30 [ 13.602879] [ 13.602951] Freed by task 276: [ 13.603109] kasan_save_stack+0x45/0x70 [ 13.603410] kasan_save_track+0x18/0x40 [ 13.603600] kasan_save_free_info+0x3f/0x60 [ 13.603816] __kasan_slab_free+0x56/0x70 [ 13.603988] kfree+0x222/0x3f0 [ 13.604177] kasan_strings+0x2aa/0xe80 [ 13.604463] kunit_try_run_case+0x1a5/0x480 [ 13.604623] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.604798] kthread+0x337/0x6f0 [ 13.604918] ret_from_fork+0x116/0x1d0 [ 13.605049] ret_from_fork_asm+0x1a/0x30 [ 13.605417] [ 13.605516] The buggy address belongs to the object at ffff8881039c45c0 [ 13.605516] which belongs to the cache kmalloc-32 of size 32 [ 13.606037] The buggy address is located 16 bytes inside of [ 13.606037] freed 32-byte region [ffff8881039c45c0, ffff8881039c45e0) [ 13.606971] [ 13.607075] The buggy address belongs to the physical page: [ 13.607418] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039c4 [ 13.607755] flags: 0x200000000000000(node=0|zone=2) [ 13.607986] page_type: f5(slab) [ 13.608215] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.608449] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.608867] page dumped because: kasan: bad access detected [ 13.609160] [ 13.609274] Memory state around the buggy address: [ 13.609525] ffff8881039c4480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.609786] ffff8881039c4500: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.610151] >ffff8881039c4580: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.610487] ^ [ 13.610850] ffff8881039c4600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.611136] ffff8881039c4680: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.611646] ==================================================================