Date
July 8, 2025, 7:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.620928] ================================================================== [ 21.620983] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 21.621046] Read of size 1 at addr fff00000c56a2110 by task kunit_try_catch/259 [ 21.621319] [ 21.621406] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 21.621501] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.621530] Hardware name: linux,dummy-virt (DT) [ 21.621747] Call trace: [ 21.621910] show_stack+0x20/0x38 (C) [ 21.622022] dump_stack_lvl+0x8c/0xd0 [ 21.622097] print_report+0x118/0x608 [ 21.622163] kasan_report+0xdc/0x128 [ 21.622276] __asan_report_load1_noabort+0x20/0x30 [ 21.622329] kasan_strings+0x95c/0xb00 [ 21.622386] kunit_try_run_case+0x170/0x3f0 [ 21.622686] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.622765] kthread+0x328/0x630 [ 21.622810] ret_from_fork+0x10/0x20 [ 21.622861] [ 21.622883] Allocated by task 259: [ 21.623294] kasan_save_stack+0x3c/0x68 [ 21.623475] kasan_save_track+0x20/0x40 [ 21.623533] kasan_save_alloc_info+0x40/0x58 [ 21.623677] __kasan_kmalloc+0xd4/0xd8 [ 21.623783] __kmalloc_cache_noprof+0x16c/0x3c0 [ 21.623823] kasan_strings+0xc8/0xb00 [ 21.623882] kunit_try_run_case+0x170/0x3f0 [ 21.624206] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.624380] kthread+0x328/0x630 [ 21.624477] ret_from_fork+0x10/0x20 [ 21.624623] [ 21.624693] Freed by task 259: [ 21.624839] kasan_save_stack+0x3c/0x68 [ 21.624884] kasan_save_track+0x20/0x40 [ 21.624924] kasan_save_free_info+0x4c/0x78 [ 21.625157] __kasan_slab_free+0x6c/0x98 [ 21.625327] kfree+0x214/0x3c8 [ 21.625397] kasan_strings+0x24c/0xb00 [ 21.625521] kunit_try_run_case+0x170/0x3f0 [ 21.625652] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.625809] kthread+0x328/0x630 [ 21.625900] ret_from_fork+0x10/0x20 [ 21.626175] [ 21.626363] The buggy address belongs to the object at fff00000c56a2100 [ 21.626363] which belongs to the cache kmalloc-32 of size 32 [ 21.626759] The buggy address is located 16 bytes inside of [ 21.626759] freed 32-byte region [fff00000c56a2100, fff00000c56a2120) [ 21.627334] [ 21.627444] The buggy address belongs to the physical page: [ 21.627483] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1056a2 [ 21.627682] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.627930] page_type: f5(slab) [ 21.628010] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 21.628148] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 21.628604] page dumped because: kasan: bad access detected [ 21.628754] [ 21.628881] Memory state around the buggy address: [ 21.628940] fff00000c56a2000: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.629005] fff00000c56a2080: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 21.629057] >fff00000c56a2100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.629095] ^ [ 21.629128] fff00000c56a2180: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.629174] fff00000c56a2200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.629231] ==================================================================
[ 14.966444] ================================================================== [ 14.966833] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 14.967087] Read of size 1 at addr ffff888102b12e50 by task kunit_try_catch/276 [ 14.967415] [ 14.967741] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.967789] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.967801] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.967824] Call Trace: [ 14.967838] <TASK> [ 14.967854] dump_stack_lvl+0x73/0xb0 [ 14.967883] print_report+0xd1/0x650 [ 14.967905] ? __virt_addr_valid+0x1db/0x2d0 [ 14.967927] ? kasan_strings+0xcbc/0xe80 [ 14.967947] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.967972] ? kasan_strings+0xcbc/0xe80 [ 14.967993] kasan_report+0x141/0x180 [ 14.968014] ? kasan_strings+0xcbc/0xe80 [ 14.968052] __asan_report_load1_noabort+0x18/0x20 [ 14.968128] kasan_strings+0xcbc/0xe80 [ 14.968148] ? trace_hardirqs_on+0x37/0xe0 [ 14.968171] ? __pfx_kasan_strings+0x10/0x10 [ 14.968191] ? finish_task_switch.isra.0+0x153/0x700 [ 14.968212] ? __switch_to+0x47/0xf50 [ 14.968237] ? __schedule+0x10cc/0x2b60 [ 14.968259] ? __pfx_read_tsc+0x10/0x10 [ 14.968279] ? ktime_get_ts64+0x86/0x230 [ 14.968303] kunit_try_run_case+0x1a5/0x480 [ 14.968326] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.968347] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.968370] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.968393] ? __kthread_parkme+0x82/0x180 [ 14.968413] ? preempt_count_sub+0x50/0x80 [ 14.968436] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.968459] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.968482] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.968505] kthread+0x337/0x6f0 [ 14.968524] ? trace_preempt_on+0x20/0xc0 [ 14.968546] ? __pfx_kthread+0x10/0x10 [ 14.968566] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.968587] ? calculate_sigpending+0x7b/0xa0 [ 14.968610] ? __pfx_kthread+0x10/0x10 [ 14.968631] ret_from_fork+0x116/0x1d0 [ 14.968649] ? __pfx_kthread+0x10/0x10 [ 14.968669] ret_from_fork_asm+0x1a/0x30 [ 14.968700] </TASK> [ 14.968711] [ 14.976457] Allocated by task 276: [ 14.976594] kasan_save_stack+0x45/0x70 [ 14.976815] kasan_save_track+0x18/0x40 [ 14.977011] kasan_save_alloc_info+0x3b/0x50 [ 14.977229] __kasan_kmalloc+0xb7/0xc0 [ 14.977417] __kmalloc_cache_noprof+0x189/0x420 [ 14.977890] kasan_strings+0xc0/0xe80 [ 14.978161] kunit_try_run_case+0x1a5/0x480 [ 14.978377] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.978782] kthread+0x337/0x6f0 [ 14.978956] ret_from_fork+0x116/0x1d0 [ 14.979422] ret_from_fork_asm+0x1a/0x30 [ 14.979627] [ 14.979719] Freed by task 276: [ 14.979881] kasan_save_stack+0x45/0x70 [ 14.980066] kasan_save_track+0x18/0x40 [ 14.980231] kasan_save_free_info+0x3f/0x60 [ 14.980376] __kasan_slab_free+0x56/0x70 [ 14.980514] kfree+0x222/0x3f0 [ 14.980684] kasan_strings+0x2aa/0xe80 [ 14.980881] kunit_try_run_case+0x1a5/0x480 [ 14.981102] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.981357] kthread+0x337/0x6f0 [ 14.981540] ret_from_fork+0x116/0x1d0 [ 14.981823] ret_from_fork_asm+0x1a/0x30 [ 14.981994] [ 14.982164] The buggy address belongs to the object at ffff888102b12e40 [ 14.982164] which belongs to the cache kmalloc-32 of size 32 [ 14.982550] The buggy address is located 16 bytes inside of [ 14.982550] freed 32-byte region [ffff888102b12e40, ffff888102b12e60) [ 14.983032] [ 14.983137] The buggy address belongs to the physical page: [ 14.983508] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b12 [ 14.984241] flags: 0x200000000000000(node=0|zone=2) [ 14.984428] page_type: f5(slab) [ 14.984634] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.984951] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 14.985369] page dumped because: kasan: bad access detected [ 14.985623] [ 14.985695] Memory state around the buggy address: [ 14.985849] ffff888102b12d00: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.986162] ffff888102b12d80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.986498] >ffff888102b12e00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.986826] ^ [ 14.987253] ffff888102b12e80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.987587] ffff888102b12f00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.987821] ==================================================================