Date
July 1, 2025, 11:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.078101] ================================================================== [ 21.078214] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 21.078682] Read of size 1 at addr fff00000c76d9210 by task kunit_try_catch/260 [ 21.078784] [ 21.078841] CPU: 0 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 21.078938] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.079304] Hardware name: linux,dummy-virt (DT) [ 21.079459] Call trace: [ 21.079544] show_stack+0x20/0x38 (C) [ 21.079744] dump_stack_lvl+0x8c/0xd0 [ 21.079874] print_report+0x118/0x608 [ 21.080078] kasan_report+0xdc/0x128 [ 21.080242] __asan_report_load1_noabort+0x20/0x30 [ 21.080321] kasan_strings+0x95c/0xb00 [ 21.080636] kunit_try_run_case+0x170/0x3f0 [ 21.080878] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.080997] kthread+0x328/0x630 [ 21.081105] ret_from_fork+0x10/0x20 [ 21.081778] [ 21.081896] Allocated by task 260: [ 21.082153] kasan_save_stack+0x3c/0x68 [ 21.082237] kasan_save_track+0x20/0x40 [ 21.082440] kasan_save_alloc_info+0x40/0x58 [ 21.082642] __kasan_kmalloc+0xd4/0xd8 [ 21.083034] __kmalloc_cache_noprof+0x16c/0x3c0 [ 21.083242] kasan_strings+0xc8/0xb00 [ 21.083340] kunit_try_run_case+0x170/0x3f0 [ 21.083536] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.083798] kthread+0x328/0x630 [ 21.083846] ret_from_fork+0x10/0x20 [ 21.084186] [ 21.084373] Freed by task 260: [ 21.084493] kasan_save_stack+0x3c/0x68 [ 21.084647] kasan_save_track+0x20/0x40 [ 21.084731] kasan_save_free_info+0x4c/0x78 [ 21.085159] __kasan_slab_free+0x6c/0x98 [ 21.085264] kfree+0x214/0x3c8 [ 21.085357] kasan_strings+0x24c/0xb00 [ 21.085456] kunit_try_run_case+0x170/0x3f0 [ 21.085659] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.085821] kthread+0x328/0x630 [ 21.086166] ret_from_fork+0x10/0x20 [ 21.086297] [ 21.086554] The buggy address belongs to the object at fff00000c76d9200 [ 21.086554] which belongs to the cache kmalloc-32 of size 32 [ 21.086641] The buggy address is located 16 bytes inside of [ 21.086641] freed 32-byte region [fff00000c76d9200, fff00000c76d9220) [ 21.086716] [ 21.086874] The buggy address belongs to the physical page: [ 21.087020] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1076d9 [ 21.087092] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.087206] page_type: f5(slab) [ 21.087485] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 21.087934] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 21.088018] page dumped because: kasan: bad access detected [ 21.088166] [ 21.088232] Memory state around the buggy address: [ 21.088327] fff00000c76d9100: 00 00 00 fc fc fc fc fc 00 00 00 04 fc fc fc fc [ 21.088691] fff00000c76d9180: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.088885] >fff00000c76d9200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.089051] ^ [ 21.089168] fff00000c76d9280: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.089327] fff00000c76d9300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.089423] ==================================================================
[ 13.446722] ================================================================== [ 13.447052] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 13.447625] Read of size 1 at addr ffff888103aaf390 by task kunit_try_catch/276 [ 13.448064] [ 13.448178] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.448223] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.448234] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.448256] Call Trace: [ 13.448273] <TASK> [ 13.448291] dump_stack_lvl+0x73/0xb0 [ 13.448320] print_report+0xd1/0x650 [ 13.448343] ? __virt_addr_valid+0x1db/0x2d0 [ 13.448366] ? kasan_strings+0xcbc/0xe80 [ 13.448404] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.448426] ? kasan_strings+0xcbc/0xe80 [ 13.448447] kasan_report+0x141/0x180 [ 13.448468] ? kasan_strings+0xcbc/0xe80 [ 13.448493] __asan_report_load1_noabort+0x18/0x20 [ 13.448516] kasan_strings+0xcbc/0xe80 [ 13.448535] ? trace_hardirqs_on+0x37/0xe0 [ 13.448559] ? __pfx_kasan_strings+0x10/0x10 [ 13.448579] ? finish_task_switch.isra.0+0x153/0x700 [ 13.448601] ? __switch_to+0x47/0xf50 [ 13.448627] ? __schedule+0x10cc/0x2b60 [ 13.448649] ? __pfx_read_tsc+0x10/0x10 [ 13.448669] ? ktime_get_ts64+0x86/0x230 [ 13.448693] kunit_try_run_case+0x1a5/0x480 [ 13.448717] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.448739] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.448762] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.448784] ? __kthread_parkme+0x82/0x180 [ 13.448804] ? preempt_count_sub+0x50/0x80 [ 13.448826] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.448850] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.448872] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.448894] kthread+0x337/0x6f0 [ 13.448913] ? trace_preempt_on+0x20/0xc0 [ 13.448935] ? __pfx_kthread+0x10/0x10 [ 13.448955] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.448975] ? calculate_sigpending+0x7b/0xa0 [ 13.448998] ? __pfx_kthread+0x10/0x10 [ 13.449017] ret_from_fork+0x116/0x1d0 [ 13.449035] ? __pfx_kthread+0x10/0x10 [ 13.449054] ret_from_fork_asm+0x1a/0x30 [ 13.449083] </TASK> [ 13.449094] [ 13.456648] Allocated by task 276: [ 13.456834] kasan_save_stack+0x45/0x70 [ 13.457014] kasan_save_track+0x18/0x40 [ 13.457183] kasan_save_alloc_info+0x3b/0x50 [ 13.457331] __kasan_kmalloc+0xb7/0xc0 [ 13.457472] __kmalloc_cache_noprof+0x189/0x420 [ 13.457630] kasan_strings+0xc0/0xe80 [ 13.457762] kunit_try_run_case+0x1a5/0x480 [ 13.457906] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.458078] kthread+0x337/0x6f0 [ 13.458200] ret_from_fork+0x116/0x1d0 [ 13.458384] ret_from_fork_asm+0x1a/0x30 [ 13.458598] [ 13.458687] Freed by task 276: [ 13.458840] kasan_save_stack+0x45/0x70 [ 13.459025] kasan_save_track+0x18/0x40 [ 13.459208] kasan_save_free_info+0x3f/0x60 [ 13.459423] __kasan_slab_free+0x56/0x70 [ 13.459641] kfree+0x222/0x3f0 [ 13.459801] kasan_strings+0x2aa/0xe80 [ 13.459980] kunit_try_run_case+0x1a5/0x480 [ 13.460186] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.460465] kthread+0x337/0x6f0 [ 13.461148] ret_from_fork+0x116/0x1d0 [ 13.461340] ret_from_fork_asm+0x1a/0x30 [ 13.461496] [ 13.461571] The buggy address belongs to the object at ffff888103aaf380 [ 13.461571] which belongs to the cache kmalloc-32 of size 32 [ 13.462093] The buggy address is located 16 bytes inside of [ 13.462093] freed 32-byte region [ffff888103aaf380, ffff888103aaf3a0) [ 13.462527] [ 13.463395] The buggy address belongs to the physical page: [ 13.463883] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103aaf [ 13.464480] flags: 0x200000000000000(node=0|zone=2) [ 13.464791] page_type: f5(slab) [ 13.464962] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.465273] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.465823] page dumped because: kasan: bad access detected [ 13.466135] [ 13.466363] Memory state around the buggy address: [ 13.466822] ffff888103aaf280: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc [ 13.467324] ffff888103aaf300: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.467786] >ffff888103aaf380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.468216] ^ [ 13.468407] ffff888103aaf400: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.468954] ffff888103aaf480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.469462] ==================================================================