Date
July 8, 2025, 4:38 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.011088] ================================================================== [ 20.011279] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 20.011379] Read of size 1 at addr fff00000c6e54a50 by task kunit_try_catch/261 [ 20.011485] [ 20.011521] CPU: 0 UID: 0 PID: 261 Comm: kunit_try_catch Tainted: G B N 6.15.6-rc1 #1 PREEMPT [ 20.011612] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.011641] Hardware name: linux,dummy-virt (DT) [ 20.011675] Call trace: [ 20.011822] show_stack+0x20/0x38 (C) [ 20.012048] dump_stack_lvl+0x8c/0xd0 [ 20.012235] print_report+0x118/0x608 [ 20.012328] kasan_report+0xdc/0x128 [ 20.012526] __asan_report_load1_noabort+0x20/0x30 [ 20.012582] strcmp+0xc0/0xc8 [ 20.012931] kasan_strings+0x340/0xb00 [ 20.013026] kunit_try_run_case+0x170/0x3f0 [ 20.013101] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.013344] kthread+0x328/0x630 [ 20.013586] ret_from_fork+0x10/0x20 [ 20.013769] [ 20.013854] Allocated by task 261: [ 20.013942] kasan_save_stack+0x3c/0x68 [ 20.014363] kasan_save_track+0x20/0x40 [ 20.014457] kasan_save_alloc_info+0x40/0x58 [ 20.014600] __kasan_kmalloc+0xd4/0xd8 [ 20.014688] __kmalloc_cache_noprof+0x16c/0x3c0 [ 20.014811] kasan_strings+0xc8/0xb00 [ 20.014883] kunit_try_run_case+0x170/0x3f0 [ 20.014972] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.015161] kthread+0x328/0x630 [ 20.015387] ret_from_fork+0x10/0x20 [ 20.015540] [ 20.015592] Freed by task 261: [ 20.015706] kasan_save_stack+0x3c/0x68 [ 20.015786] kasan_save_track+0x20/0x40 [ 20.016006] kasan_save_free_info+0x4c/0x78 [ 20.016222] __kasan_slab_free+0x6c/0x98 [ 20.016302] kfree+0x214/0x3c8 [ 20.016705] kasan_strings+0x24c/0xb00 [ 20.016793] kunit_try_run_case+0x170/0x3f0 [ 20.017172] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.017303] kthread+0x328/0x630 [ 20.017438] ret_from_fork+0x10/0x20 [ 20.017488] [ 20.017510] The buggy address belongs to the object at fff00000c6e54a40 [ 20.017510] which belongs to the cache kmalloc-32 of size 32 [ 20.017763] The buggy address is located 16 bytes inside of [ 20.017763] freed 32-byte region [fff00000c6e54a40, fff00000c6e54a60) [ 20.017969] [ 20.018068] The buggy address belongs to the physical page: [ 20.018284] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106e54 [ 20.018553] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.018845] page_type: f5(slab) [ 20.018900] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.019200] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.019514] page dumped because: kasan: bad access detected [ 20.020327] fff00000c6e54b00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.022861] print_report+0x118/0x608 [ 20.024175] kthread+0x328/0x630 [ 20.025000] __kasan_kmalloc+0xd4/0xd8 [ 20.025803] kthread+0x328/0x630 [ 20.026474] kasan_save_free_info+0x4c/0x78 [ 20.026943] The buggy address is located 16 bytes inside of [ 20.026943] freed 32-byte region [fff00000c6e54a40, fff00000c6e54a60) [ 20.027574] >fff00000c6e54a00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.029974] [ 20.030011] CPU: 0 UID: 0 PID: 261 Comm: kunit_try_catch Tainted: G B N 6.15.6-rc1 #1 PREEMPT [ 20.031669] kunit_try_run_case+0x170/0x3f0 [ 20.032935] __kmalloc_cache_noprof+0x16c/0x3c0 [ 20.033657] ret_from_fork+0x10/0x20 [ 20.036100] [ 20.036344] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106e54 [ 20.037877] >fff00000c6e54a00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.040147] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 20.041816] kasan_report+0xdc/0x128 [ 20.043407] [ 20.043789] __kasan_kmalloc+0xd4/0xd8 [ 20.044557] kthread+0x328/0x630 [ 20.044864] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106e54 [ 20.045168] [ 20.045222] fff00000c6e54900: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.045324] >fff00000c6e54a00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.053257] not ok 62 kasan_strings [ 20.058355] ==================================================================
[ 13.220144] ================================================================== [ 13.222631] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 13.223342] Read of size 1 at addr ffff88810360c050 by task kunit_try_catch/279 [ 13.223926] [ 13.224030] CPU: 0 UID: 0 PID: 279 Comm: kunit_try_catch Tainted: G B N 6.15.6-rc1 #1 PREEMPT(voluntary) [ 13.224081] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.224094] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.224117] Call Trace: [ 13.224131] <TASK> [ 13.224148] dump_stack_lvl+0x73/0xb0 [ 13.224177] print_report+0xd1/0x650 [ 13.224203] ? __virt_addr_valid+0x1db/0x2d0 [ 13.224228] ? strcmp+0xb0/0xc0 [ 13.224247] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.224271] ? strcmp+0xb0/0xc0 [ 13.224291] kasan_report+0x141/0x180 [ 13.224315] ? strcmp+0xb0/0xc0 [ 13.224338] __asan_report_load1_noabort+0x18/0x20 [ 13.224360] strcmp+0xb0/0xc0 [ 13.224382] kasan_strings+0x431/0xe80 [ 13.224403] ? trace_hardirqs_on+0x37/0xe0 [ 13.224428] ? __pfx_kasan_strings+0x10/0x10 [ 13.224450] ? finish_task_switch.isra.0+0x153/0x700 [ 13.224476] ? __switch_to+0x5d9/0xf60 [ 13.224497] ? dequeue_task_fair+0x166/0x4e0 [ 13.224522] ? __schedule+0x10cc/0x2b60 [ 13.224547] ? __pfx_read_tsc+0x10/0x10 [ 13.224567] ? ktime_get_ts64+0x86/0x230 [ 13.224594] kunit_try_run_case+0x1a5/0x480 [ 13.224616] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.224636] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.224661] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.224685] ? __kthread_parkme+0x82/0x180 [ 13.224721] ? preempt_count_sub+0x50/0x80 [ 13.224746] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.224767] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.224804] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.224828] kthread+0x337/0x6f0 [ 13.224846] ? trace_preempt_on+0x20/0xc0 [ 13.224868] ? __pfx_kthread+0x10/0x10 [ 13.224907] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.224930] ? calculate_sigpending+0x7b/0xa0 [ 13.224952] ? __pfx_kthread+0x10/0x10 [ 13.224971] ret_from_fork+0x41/0x80 [ 13.224993] ? __pfx_kthread+0x10/0x10 [ 13.225012] ret_from_fork_asm+0x1a/0x30 [ 13.225044] </TASK> [ 13.225056] [ 13.236049] Allocated by task 279: [ 13.236586] kasan_save_stack+0x45/0x70 [ 13.237144] kasan_save_track+0x18/0x40 [ 13.237302] kasan_save_alloc_info+0x3b/0x50 [ 13.237824] __kasan_kmalloc+0xb7/0xc0 [ 13.238051] __kmalloc_cache_noprof+0x189/0x420 [ 13.238635] kasan_strings+0xc0/0xe80 [ 13.238816] kunit_try_run_case+0x1a5/0x480 [ 13.239324] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.239730] kthread+0x337/0x6f0 [ 13.239908] ret_from_fork+0x41/0x80 [ 13.240274] ret_from_fork_asm+0x1a/0x30 [ 13.240635] [ 13.240716] Freed by task 279: [ 13.241176] kasan_save_stack+0x45/0x70 [ 13.241352] kasan_save_track+0x18/0x40 [ 13.241676] kasan_save_free_info+0x3f/0x60 [ 13.241883] __kasan_slab_free+0x56/0x70 [ 13.242341] kfree+0x222/0x3f0 [ 13.242641] kasan_strings+0x2aa/0xe80 [ 13.243104] kunit_try_run_case+0x1a5/0x480 [ 13.243276] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.243855] kthread+0x337/0x6f0 [ 13.244231] ret_from_fork+0x41/0x80 [ 13.244431] ret_from_fork_asm+0x1a/0x30 [ 13.244751] [ 13.244921] The buggy address belongs to the object at ffff88810360c040 [ 13.244921] which belongs to the cache kmalloc-32 of size 32 [ 13.245612] The buggy address is located 16 bytes inside of [ 13.245612] freed 32-byte region [ffff88810360c040, ffff88810360c060) [ 13.246499] [ 13.246596] The buggy address belongs to the physical page: [ 13.247067] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10360c [ 13.247504] flags: 0x200000000000000(node=0|zone=2) [ 13.247758] page_type: f5(slab) [ 13.248147] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.248446] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.248796] page dumped because: kasan: bad access detected [ 13.249243] [ 13.249349] Memory state around the buggy address: [ 13.249757] ffff88810360bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.250251] ffff88810360bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.250606] >ffff88810360c000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.251061] ^ [ 13.251415] ffff88810360c080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.251865] ffff88810360c100: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.252337] ==================================================================