Date
July 9, 2025, 1:08 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.654519] ================================================================== [ 31.654579] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 31.654996] Read of size 1 at addr fff00000c9c23a10 by task kunit_try_catch/291 [ 31.655426] [ 31.655470] CPU: 1 UID: 0 PID: 291 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250709 #1 PREEMPT [ 31.655587] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.655872] Hardware name: linux,dummy-virt (DT) [ 31.655941] Call trace: [ 31.655986] show_stack+0x20/0x38 (C) [ 31.656328] dump_stack_lvl+0x8c/0xd0 [ 31.656568] print_report+0x118/0x5d0 [ 31.656738] kasan_report+0xdc/0x128 [ 31.656998] __asan_report_load1_noabort+0x20/0x30 [ 31.657420] strnlen+0x80/0x88 [ 31.657625] kasan_strings+0x478/0xb00 [ 31.657883] kunit_try_run_case+0x170/0x3f0 [ 31.658070] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.658184] kthread+0x328/0x630 [ 31.658271] ret_from_fork+0x10/0x20 [ 31.658782] [ 31.658835] Allocated by task 291: [ 31.658981] kasan_save_stack+0x3c/0x68 [ 31.659118] kasan_save_track+0x20/0x40 [ 31.659181] kasan_save_alloc_info+0x40/0x58 [ 31.659276] __kasan_kmalloc+0xd4/0xd8 [ 31.659401] __kmalloc_cache_noprof+0x16c/0x3c0 [ 31.659605] kasan_strings+0xc8/0xb00 [ 31.659658] kunit_try_run_case+0x170/0x3f0 [ 31.659823] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.659878] kthread+0x328/0x630 [ 31.659927] ret_from_fork+0x10/0x20 [ 31.660303] [ 31.660353] Freed by task 291: [ 31.660496] kasan_save_stack+0x3c/0x68 [ 31.660549] kasan_save_track+0x20/0x40 [ 31.660592] kasan_save_free_info+0x4c/0x78 [ 31.660642] __kasan_slab_free+0x6c/0x98 [ 31.660714] kfree+0x214/0x3c8 [ 31.660762] kasan_strings+0x24c/0xb00 [ 31.660810] kunit_try_run_case+0x170/0x3f0 [ 31.660858] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.661265] kthread+0x328/0x630 [ 31.661435] ret_from_fork+0x10/0x20 [ 31.662035] [ 31.662092] The buggy address belongs to the object at fff00000c9c23a00 [ 31.662092] which belongs to the cache kmalloc-32 of size 32 [ 31.662296] The buggy address is located 16 bytes inside of [ 31.662296] freed 32-byte region [fff00000c9c23a00, fff00000c9c23a20) [ 31.662664] [ 31.662716] The buggy address belongs to the physical page: [ 31.662783] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109c23 [ 31.662888] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.663065] page_type: f5(slab) [ 31.663190] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 31.663356] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 31.663474] page dumped because: kasan: bad access detected [ 31.663532] [ 31.663864] Memory state around the buggy address: [ 31.663946] fff00000c9c23900: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 31.664045] fff00000c9c23980: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 31.664186] >fff00000c9c23a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 31.664227] ^ [ 31.664259] fff00000c9c23a80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 31.664560] fff00000c9c23b00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 31.664668] ==================================================================
[ 26.109908] ================================================================== [ 26.110262] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 26.110522] Read of size 1 at addr ffff88810539c3d0 by task kunit_try_catch/309 [ 26.110849] [ 26.110940] CPU: 1 UID: 0 PID: 309 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc5-next-20250709 #1 PREEMPT(voluntary) [ 26.111041] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 26.111055] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.111077] Call Trace: [ 26.111096] <TASK> [ 26.111113] dump_stack_lvl+0x73/0xb0 [ 26.111143] print_report+0xd1/0x610 [ 26.111165] ? __virt_addr_valid+0x1db/0x2d0 [ 26.111190] ? strnlen+0x73/0x80 [ 26.111209] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.111235] ? strnlen+0x73/0x80 [ 26.111254] kasan_report+0x141/0x180 [ 26.111278] ? strnlen+0x73/0x80 [ 26.111301] __asan_report_load1_noabort+0x18/0x20 [ 26.111325] strnlen+0x73/0x80 [ 26.111345] kasan_strings+0x615/0xe80 [ 26.111364] ? trace_hardirqs_on+0x37/0xe0 [ 26.111388] ? __pfx_kasan_strings+0x10/0x10 [ 26.111408] ? finish_task_switch.isra.0+0x153/0x700 [ 26.111432] ? __switch_to+0x47/0xf80 [ 26.111458] ? __schedule+0x10cc/0x2b60 [ 26.111482] ? __pfx_read_tsc+0x10/0x10 [ 26.111504] ? ktime_get_ts64+0x86/0x230 [ 26.111530] kunit_try_run_case+0x1a5/0x480 [ 26.111551] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.111571] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 26.111594] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 26.111618] ? __kthread_parkme+0x82/0x180 [ 26.111638] ? preempt_count_sub+0x50/0x80 [ 26.111661] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.111682] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.111719] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 26.111744] kthread+0x337/0x6f0 [ 26.111764] ? trace_preempt_on+0x20/0xc0 [ 26.111785] ? __pfx_kthread+0x10/0x10 [ 26.111806] ? _raw_spin_unlock_irq+0x47/0x80 [ 26.111834] ? calculate_sigpending+0x7b/0xa0 [ 26.111858] ? __pfx_kthread+0x10/0x10 [ 26.111879] ret_from_fork+0x116/0x1d0 [ 26.111899] ? __pfx_kthread+0x10/0x10 [ 26.111920] ret_from_fork_asm+0x1a/0x30 [ 26.111950] </TASK> [ 26.111961] [ 26.120010] Allocated by task 309: [ 26.120146] kasan_save_stack+0x45/0x70 [ 26.120290] kasan_save_track+0x18/0x40 [ 26.120420] kasan_save_alloc_info+0x3b/0x50 [ 26.120563] __kasan_kmalloc+0xb7/0xc0 [ 26.120690] __kmalloc_cache_noprof+0x189/0x420 [ 26.120854] kasan_strings+0xc0/0xe80 [ 26.120978] kunit_try_run_case+0x1a5/0x480 [ 26.121175] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.121422] kthread+0x337/0x6f0 [ 26.121793] ret_from_fork+0x116/0x1d0 [ 26.121983] ret_from_fork_asm+0x1a/0x30 [ 26.122172] [ 26.122259] Freed by task 309: [ 26.122549] kasan_save_stack+0x45/0x70 [ 26.122757] kasan_save_track+0x18/0x40 [ 26.123084] kasan_save_free_info+0x3f/0x60 [ 26.123291] __kasan_slab_free+0x56/0x70 [ 26.123482] kfree+0x222/0x3f0 [ 26.123640] kasan_strings+0x2aa/0xe80 [ 26.123871] kunit_try_run_case+0x1a5/0x480 [ 26.124079] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.124330] kthread+0x337/0x6f0 [ 26.124442] ret_from_fork+0x116/0x1d0 [ 26.124564] ret_from_fork_asm+0x1a/0x30 [ 26.124704] [ 26.124769] The buggy address belongs to the object at ffff88810539c3c0 [ 26.124769] which belongs to the cache kmalloc-32 of size 32 [ 26.125530] The buggy address is located 16 bytes inside of [ 26.125530] freed 32-byte region [ffff88810539c3c0, ffff88810539c3e0) [ 26.126402] [ 26.126520] The buggy address belongs to the physical page: [ 26.126747] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10539c [ 26.127161] flags: 0x200000000000000(node=0|zone=2) [ 26.127378] page_type: f5(slab) [ 26.127493] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 26.127720] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 26.128084] page dumped because: kasan: bad access detected [ 26.128433] [ 26.128528] Memory state around the buggy address: [ 26.128689] ffff88810539c280: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 26.129277] ffff88810539c300: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 26.129558] >ffff88810539c380: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 26.129846] ^ [ 26.130339] ffff88810539c400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 26.130587] ffff88810539c480: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 26.130798] ==================================================================