Date
July 5, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.475633] ================================================================== [ 20.476076] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 20.476163] Read of size 1 at addr fff00000c78cc650 by task kunit_try_catch/259 [ 20.476216] [ 20.476247] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 20.476741] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.476785] Hardware name: linux,dummy-virt (DT) [ 20.476817] Call trace: [ 20.476896] show_stack+0x20/0x38 (C) [ 20.477087] dump_stack_lvl+0x8c/0xd0 [ 20.477160] print_report+0x118/0x608 [ 20.477294] kasan_report+0xdc/0x128 [ 20.477392] __asan_report_load1_noabort+0x20/0x30 [ 20.477445] strnlen+0x80/0x88 [ 20.477489] kasan_strings+0x478/0xb00 [ 20.477554] kunit_try_run_case+0x170/0x3f0 [ 20.477630] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.477703] kthread+0x328/0x630 [ 20.477847] ret_from_fork+0x10/0x20 [ 20.477944] [ 20.477998] Allocated by task 259: [ 20.478047] kasan_save_stack+0x3c/0x68 [ 20.478140] kasan_save_track+0x20/0x40 [ 20.478188] kasan_save_alloc_info+0x40/0x58 [ 20.478230] __kasan_kmalloc+0xd4/0xd8 [ 20.478312] __kmalloc_cache_noprof+0x16c/0x3c0 [ 20.478359] kasan_strings+0xc8/0xb00 [ 20.479197] kunit_try_run_case+0x170/0x3f0 [ 20.479406] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.479573] kthread+0x328/0x630 [ 20.479673] ret_from_fork+0x10/0x20 [ 20.479834] [ 20.479860] Freed by task 259: [ 20.480181] kasan_save_stack+0x3c/0x68 [ 20.480310] kasan_save_track+0x20/0x40 [ 20.480376] kasan_save_free_info+0x4c/0x78 [ 20.480418] __kasan_slab_free+0x6c/0x98 [ 20.480458] kfree+0x214/0x3c8 [ 20.480493] kasan_strings+0x24c/0xb00 [ 20.480560] kunit_try_run_case+0x170/0x3f0 [ 20.480599] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.480684] kthread+0x328/0x630 [ 20.480967] ret_from_fork+0x10/0x20 [ 20.481015] [ 20.481036] The buggy address belongs to the object at fff00000c78cc640 [ 20.481036] which belongs to the cache kmalloc-32 of size 32 [ 20.481258] The buggy address is located 16 bytes inside of [ 20.481258] freed 32-byte region [fff00000c78cc640, fff00000c78cc660) [ 20.481600] [ 20.481624] The buggy address belongs to the physical page: [ 20.481658] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1078cc [ 20.481712] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.482008] page_type: f5(slab) [ 20.482179] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.482238] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.482366] page dumped because: kasan: bad access detected [ 20.482462] [ 20.482517] Memory state around the buggy address: [ 20.482567] fff00000c78cc500: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.482613] fff00000c78cc580: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 20.482657] >fff00000c78cc600: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.482915] ^ [ 20.482964] fff00000c78cc680: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.483049] fff00000c78cc700: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.483116] ==================================================================
[ 15.794687] ================================================================== [ 15.795112] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 15.795456] Read of size 1 at addr ffff888102a0d790 by task kunit_try_catch/277 [ 15.795964] [ 15.796079] CPU: 1 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 15.796131] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.796146] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 15.796173] Call Trace: [ 15.796196] <TASK> [ 15.796216] dump_stack_lvl+0x73/0xb0 [ 15.796252] print_report+0xd1/0x650 [ 15.796279] ? __virt_addr_valid+0x1db/0x2d0 [ 15.796305] ? strnlen+0x73/0x80 [ 15.796326] ? kasan_complete_mode_report_info+0x64/0x200 [ 15.796351] ? strnlen+0x73/0x80 [ 15.796372] kasan_report+0x141/0x180 [ 15.796398] ? strnlen+0x73/0x80 [ 15.796423] __asan_report_load1_noabort+0x18/0x20 [ 15.796451] strnlen+0x73/0x80 [ 15.796472] kasan_strings+0x615/0xe80 [ 15.796496] ? trace_hardirqs_on+0x37/0xe0 [ 15.796523] ? __pfx_kasan_strings+0x10/0x10 [ 15.796599] ? finish_task_switch.isra.0+0x153/0x700 [ 15.796628] ? __switch_to+0x47/0xf50 [ 15.796658] ? __schedule+0x10cc/0x2b60 [ 15.796685] ? __pfx_read_tsc+0x10/0x10 [ 15.796710] ? ktime_get_ts64+0x86/0x230 [ 15.796738] kunit_try_run_case+0x1a5/0x480 [ 15.796766] ? __pfx_kunit_try_run_case+0x10/0x10 [ 15.796804] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 15.796832] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 15.796859] ? __kthread_parkme+0x82/0x180 [ 15.796881] ? preempt_count_sub+0x50/0x80 [ 15.796908] ? __pfx_kunit_try_run_case+0x10/0x10 [ 15.796935] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 15.796961] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 15.796988] kthread+0x337/0x6f0 [ 15.797011] ? trace_preempt_on+0x20/0xc0 [ 15.797036] ? __pfx_kthread+0x10/0x10 [ 15.797060] ? _raw_spin_unlock_irq+0x47/0x80 [ 15.797086] ? calculate_sigpending+0x7b/0xa0 [ 15.797114] ? __pfx_kthread+0x10/0x10 [ 15.797140] ret_from_fork+0x116/0x1d0 [ 15.797161] ? __pfx_kthread+0x10/0x10 [ 15.797185] ret_from_fork_asm+0x1a/0x30 [ 15.797222] </TASK> [ 15.797236] [ 15.807342] Allocated by task 277: [ 15.807573] kasan_save_stack+0x45/0x70 [ 15.807817] kasan_save_track+0x18/0x40 [ 15.808000] kasan_save_alloc_info+0x3b/0x50 [ 15.808344] __kasan_kmalloc+0xb7/0xc0 [ 15.808522] __kmalloc_cache_noprof+0x189/0x420 [ 15.808775] kasan_strings+0xc0/0xe80 [ 15.808943] kunit_try_run_case+0x1a5/0x480 [ 15.809328] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 15.809646] kthread+0x337/0x6f0 [ 15.809864] ret_from_fork+0x116/0x1d0 [ 15.810085] ret_from_fork_asm+0x1a/0x30 [ 15.810358] [ 15.810475] Freed by task 277: [ 15.810652] kasan_save_stack+0x45/0x70 [ 15.810830] kasan_save_track+0x18/0x40 [ 15.811017] kasan_save_free_info+0x3f/0x60 [ 15.811461] __kasan_slab_free+0x56/0x70 [ 15.811714] kfree+0x222/0x3f0 [ 15.811924] kasan_strings+0x2aa/0xe80 [ 15.812218] kunit_try_run_case+0x1a5/0x480 [ 15.812437] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 15.812639] kthread+0x337/0x6f0 [ 15.812779] ret_from_fork+0x116/0x1d0 [ 15.813012] ret_from_fork_asm+0x1a/0x30 [ 15.813237] [ 15.813356] The buggy address belongs to the object at ffff888102a0d780 [ 15.813356] which belongs to the cache kmalloc-32 of size 32 [ 15.814260] The buggy address is located 16 bytes inside of [ 15.814260] freed 32-byte region [ffff888102a0d780, ffff888102a0d7a0) [ 15.814767] [ 15.814900] The buggy address belongs to the physical page: [ 15.815169] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a0d [ 15.815536] flags: 0x200000000000000(node=0|zone=2) [ 15.815770] page_type: f5(slab) [ 15.816068] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 15.816532] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 15.816948] page dumped because: kasan: bad access detected [ 15.817216] [ 15.817550] Memory state around the buggy address: [ 15.817779] ffff888102a0d680: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 15.818052] ffff888102a0d700: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 15.818429] >ffff888102a0d780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 15.818833] ^ [ 15.819024] ffff888102a0d800: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 15.819490] ffff888102a0d880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 15.819890] ==================================================================