Date
July 9, 2025, 11:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.848809] ================================================================== [ 18.848868] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 18.848921] Read of size 1 at addr fff00000c6460590 by task kunit_try_catch/259 [ 18.848971] [ 18.849007] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 18.849092] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.849135] Hardware name: linux,dummy-virt (DT) [ 18.850162] Call trace: [ 18.850193] show_stack+0x20/0x38 (C) [ 18.850259] dump_stack_lvl+0x8c/0xd0 [ 18.850312] print_report+0x118/0x608 [ 18.850371] kasan_report+0xdc/0x128 [ 18.850419] __asan_report_load1_noabort+0x20/0x30 [ 18.850473] kasan_strings+0x95c/0xb00 [ 18.850517] kunit_try_run_case+0x170/0x3f0 [ 18.850568] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.850622] kthread+0x328/0x630 [ 18.850667] ret_from_fork+0x10/0x20 [ 18.850717] [ 18.850740] Allocated by task 259: [ 18.850769] kasan_save_stack+0x3c/0x68 [ 18.851176] kasan_save_track+0x20/0x40 [ 18.851219] kasan_save_alloc_info+0x40/0x58 [ 18.851262] __kasan_kmalloc+0xd4/0xd8 [ 18.851300] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.851343] kasan_strings+0xc8/0xb00 [ 18.851381] kunit_try_run_case+0x170/0x3f0 [ 18.851425] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.851470] kthread+0x328/0x630 [ 18.851506] ret_from_fork+0x10/0x20 [ 18.851544] [ 18.851564] Freed by task 259: [ 18.851594] kasan_save_stack+0x3c/0x68 [ 18.851633] kasan_save_track+0x20/0x40 [ 18.852413] kasan_save_free_info+0x4c/0x78 [ 18.852479] __kasan_slab_free+0x6c/0x98 [ 18.852690] kfree+0x214/0x3c8 [ 18.853012] kasan_strings+0x24c/0xb00 [ 18.853179] kunit_try_run_case+0x170/0x3f0 [ 18.853277] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.853479] kthread+0x328/0x630 [ 18.853882] ret_from_fork+0x10/0x20 [ 18.853958] [ 18.854105] The buggy address belongs to the object at fff00000c6460580 [ 18.854105] which belongs to the cache kmalloc-32 of size 32 [ 18.854292] The buggy address is located 16 bytes inside of [ 18.854292] freed 32-byte region [fff00000c6460580, fff00000c64605a0) [ 18.854392] [ 18.854474] The buggy address belongs to the physical page: [ 18.854652] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106460 [ 18.854911] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.855820] page_type: f5(slab) [ 18.855913] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 18.855986] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 18.856065] page dumped because: kasan: bad access detected [ 18.856109] [ 18.856151] Memory state around the buggy address: [ 18.856203] fff00000c6460480: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.856252] fff00000c6460500: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.856460] >fff00000c6460580: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.856785] ^ [ 18.857079] fff00000c6460600: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.857310] fff00000c6460680: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.857458] ==================================================================
[ 14.474157] ================================================================== [ 14.474498] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 14.474967] Read of size 1 at addr ffff8881032060d0 by task kunit_try_catch/276 [ 14.475341] [ 14.475433] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.475474] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.475486] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.475507] Call Trace: [ 14.475520] <TASK> [ 14.475533] dump_stack_lvl+0x73/0xb0 [ 14.475561] print_report+0xd1/0x650 [ 14.475583] ? __virt_addr_valid+0x1db/0x2d0 [ 14.475605] ? kasan_strings+0xcbc/0xe80 [ 14.475625] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.475649] ? kasan_strings+0xcbc/0xe80 [ 14.475669] kasan_report+0x141/0x180 [ 14.475690] ? kasan_strings+0xcbc/0xe80 [ 14.475727] __asan_report_load1_noabort+0x18/0x20 [ 14.475752] kasan_strings+0xcbc/0xe80 [ 14.475771] ? trace_hardirqs_on+0x37/0xe0 [ 14.475796] ? __pfx_kasan_strings+0x10/0x10 [ 14.475817] ? finish_task_switch.isra.0+0x153/0x700 [ 14.475841] ? __switch_to+0x47/0xf50 [ 14.475866] ? __schedule+0x10cc/0x2b60 [ 14.475887] ? __pfx_read_tsc+0x10/0x10 [ 14.475909] ? ktime_get_ts64+0x86/0x230 [ 14.475932] kunit_try_run_case+0x1a5/0x480 [ 14.475956] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.475980] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.476003] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.476028] ? __kthread_parkme+0x82/0x180 [ 14.476048] ? preempt_count_sub+0x50/0x80 [ 14.476071] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.476095] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.476144] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.476169] kthread+0x337/0x6f0 [ 14.476188] ? trace_preempt_on+0x20/0xc0 [ 14.476212] ? __pfx_kthread+0x10/0x10 [ 14.476233] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.476255] ? calculate_sigpending+0x7b/0xa0 [ 14.476278] ? __pfx_kthread+0x10/0x10 [ 14.476299] ret_from_fork+0x116/0x1d0 [ 14.476321] ? __pfx_kthread+0x10/0x10 [ 14.476341] ret_from_fork_asm+0x1a/0x30 [ 14.476371] </TASK> [ 14.476381] [ 14.483745] Allocated by task 276: [ 14.483914] kasan_save_stack+0x45/0x70 [ 14.484114] kasan_save_track+0x18/0x40 [ 14.484275] kasan_save_alloc_info+0x3b/0x50 [ 14.484489] __kasan_kmalloc+0xb7/0xc0 [ 14.484654] __kmalloc_cache_noprof+0x189/0x420 [ 14.484861] kasan_strings+0xc0/0xe80 [ 14.484991] kunit_try_run_case+0x1a5/0x480 [ 14.485389] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.485629] kthread+0x337/0x6f0 [ 14.485759] ret_from_fork+0x116/0x1d0 [ 14.485890] ret_from_fork_asm+0x1a/0x30 [ 14.486107] [ 14.486201] Freed by task 276: [ 14.486358] kasan_save_stack+0x45/0x70 [ 14.486550] kasan_save_track+0x18/0x40 [ 14.486750] kasan_save_free_info+0x3f/0x60 [ 14.486945] __kasan_slab_free+0x56/0x70 [ 14.487184] kfree+0x222/0x3f0 [ 14.487344] kasan_strings+0x2aa/0xe80 [ 14.487510] kunit_try_run_case+0x1a5/0x480 [ 14.487681] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.487940] kthread+0x337/0x6f0 [ 14.488116] ret_from_fork+0x116/0x1d0 [ 14.488281] ret_from_fork_asm+0x1a/0x30 [ 14.488436] [ 14.488526] The buggy address belongs to the object at ffff8881032060c0 [ 14.488526] which belongs to the cache kmalloc-32 of size 32 [ 14.488944] The buggy address is located 16 bytes inside of [ 14.488944] freed 32-byte region [ffff8881032060c0, ffff8881032060e0) [ 14.489688] [ 14.489883] The buggy address belongs to the physical page: [ 14.490056] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103206 [ 14.490383] flags: 0x200000000000000(node=0|zone=2) [ 14.490615] page_type: f5(slab) [ 14.490934] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.491271] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.491528] page dumped because: kasan: bad access detected [ 14.491794] [ 14.491891] Memory state around the buggy address: [ 14.492288] ffff888103205f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.492558] ffff888103206000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.492869] >ffff888103206080: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.493211] ^ [ 14.493396] ffff888103206100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.493612] ffff888103206180: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.494880] ==================================================================