Date
July 16, 2025, 12:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.995693] ================================================================== [ 32.996124] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 32.996189] Read of size 1 at addr fff00000c9bb4890 by task kunit_try_catch/290 [ 32.996422] [ 32.996649] CPU: 0 UID: 0 PID: 290 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250716 #1 PREEMPT [ 32.996860] Tainted: [B]=BAD_PAGE, [N]=TEST [ 32.997015] Hardware name: linux,dummy-virt (DT) [ 32.997094] Call trace: [ 32.997365] show_stack+0x20/0x38 (C) [ 32.997690] dump_stack_lvl+0x8c/0xd0 [ 32.997865] print_report+0x118/0x5d0 [ 32.997995] kasan_report+0xdc/0x128 [ 32.998296] __asan_report_load1_noabort+0x20/0x30 [ 32.998540] strlen+0xa8/0xb0 [ 32.998631] kasan_strings+0x418/0xb00 [ 32.998821] kunit_try_run_case+0x170/0x3f0 [ 32.999051] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.999151] kthread+0x328/0x630 [ 32.999277] ret_from_fork+0x10/0x20 [ 32.999586] [ 32.999663] Allocated by task 290: [ 32.999960] kasan_save_stack+0x3c/0x68 [ 33.000063] kasan_save_track+0x20/0x40 [ 33.000108] kasan_save_alloc_info+0x40/0x58 [ 33.000151] __kasan_kmalloc+0xd4/0xd8 [ 33.000190] __kmalloc_cache_noprof+0x16c/0x3c0 [ 33.000693] kasan_strings+0xc8/0xb00 [ 33.000755] kunit_try_run_case+0x170/0x3f0 [ 33.000926] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.001148] kthread+0x328/0x630 [ 33.001230] ret_from_fork+0x10/0x20 [ 33.001403] [ 33.001429] Freed by task 290: [ 33.001680] kasan_save_stack+0x3c/0x68 [ 33.001840] kasan_save_track+0x20/0x40 [ 33.002062] kasan_save_free_info+0x4c/0x78 [ 33.002306] __kasan_slab_free+0x6c/0x98 [ 33.002419] kfree+0x214/0x3c8 [ 33.002719] kasan_strings+0x24c/0xb00 [ 33.002876] kunit_try_run_case+0x170/0x3f0 [ 33.003104] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.003366] kthread+0x328/0x630 [ 33.003451] ret_from_fork+0x10/0x20 [ 33.003702] [ 33.003882] The buggy address belongs to the object at fff00000c9bb4880 [ 33.003882] which belongs to the cache kmalloc-32 of size 32 [ 33.004081] The buggy address is located 16 bytes inside of [ 33.004081] freed 32-byte region [fff00000c9bb4880, fff00000c9bb48a0) [ 33.004162] [ 33.004236] The buggy address belongs to the physical page: [ 33.004272] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109bb4 [ 33.004330] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 33.004643] page_type: f5(slab) [ 33.004706] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 33.004761] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 33.004807] page dumped because: kasan: bad access detected [ 33.004843] [ 33.004863] Memory state around the buggy address: [ 33.004916] fff00000c9bb4780: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 33.004979] fff00000c9bb4800: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 33.005027] >fff00000c9bb4880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 33.005068] ^ [ 33.005100] fff00000c9bb4900: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 33.005175] fff00000c9bb4980: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 33.005218] ==================================================================
[ 25.277458] ================================================================== [ 25.277707] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 25.278188] Read of size 1 at addr ffff8881053b8d50 by task kunit_try_catch/308 [ 25.278872] [ 25.279116] CPU: 0 UID: 0 PID: 308 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250716 #1 PREEMPT(voluntary) [ 25.279182] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.279195] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.279217] Call Trace: [ 25.279246] <TASK> [ 25.279264] dump_stack_lvl+0x73/0xb0 [ 25.279312] print_report+0xd1/0x610 [ 25.279335] ? __virt_addr_valid+0x1db/0x2d0 [ 25.279358] ? strlen+0x8f/0xb0 [ 25.279390] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.279417] ? strlen+0x8f/0xb0 [ 25.279438] kasan_report+0x141/0x180 [ 25.279459] ? strlen+0x8f/0xb0 [ 25.279484] __asan_report_load1_noabort+0x18/0x20 [ 25.279508] strlen+0x8f/0xb0 [ 25.279530] kasan_strings+0x57b/0xe80 [ 25.279550] ? trace_hardirqs_on+0x37/0xe0 [ 25.279591] ? __pfx_kasan_strings+0x10/0x10 [ 25.279611] ? finish_task_switch.isra.0+0x153/0x700 [ 25.279632] ? __switch_to+0x47/0xf80 [ 25.279657] ? __schedule+0x10c6/0x2b60 [ 25.279679] ? __pfx_read_tsc+0x10/0x10 [ 25.279701] ? ktime_get_ts64+0x86/0x230 [ 25.279726] kunit_try_run_case+0x1a5/0x480 [ 25.279750] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.279771] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.279794] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.279817] ? __kthread_parkme+0x82/0x180 [ 25.279837] ? preempt_count_sub+0x50/0x80 [ 25.279879] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.279902] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.279929] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.279955] kthread+0x337/0x6f0 [ 25.279974] ? trace_preempt_on+0x20/0xc0 [ 25.279996] ? __pfx_kthread+0x10/0x10 [ 25.280016] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.280037] ? calculate_sigpending+0x7b/0xa0 [ 25.280060] ? __pfx_kthread+0x10/0x10 [ 25.280081] ret_from_fork+0x116/0x1d0 [ 25.280099] ? __pfx_kthread+0x10/0x10 [ 25.280120] ret_from_fork_asm+0x1a/0x30 [ 25.280151] </TASK> [ 25.280162] [ 25.293477] Allocated by task 308: [ 25.293869] kasan_save_stack+0x45/0x70 [ 25.294311] kasan_save_track+0x18/0x40 [ 25.294800] kasan_save_alloc_info+0x3b/0x50 [ 25.295372] __kasan_kmalloc+0xb7/0xc0 [ 25.295754] __kmalloc_cache_noprof+0x189/0x420 [ 25.296146] kasan_strings+0xc0/0xe80 [ 25.296522] kunit_try_run_case+0x1a5/0x480 [ 25.296856] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.297161] kthread+0x337/0x6f0 [ 25.297275] ret_from_fork+0x116/0x1d0 [ 25.297774] ret_from_fork_asm+0x1a/0x30 [ 25.298230] [ 25.298559] Freed by task 308: [ 25.298694] kasan_save_stack+0x45/0x70 [ 25.299125] kasan_save_track+0x18/0x40 [ 25.299635] kasan_save_free_info+0x3f/0x60 [ 25.300168] __kasan_slab_free+0x56/0x70 [ 25.300332] kfree+0x222/0x3f0 [ 25.300736] kasan_strings+0x2aa/0xe80 [ 25.301215] kunit_try_run_case+0x1a5/0x480 [ 25.301691] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.301907] kthread+0x337/0x6f0 [ 25.302485] ret_from_fork+0x116/0x1d0 [ 25.302970] ret_from_fork_asm+0x1a/0x30 [ 25.303124] [ 25.303192] The buggy address belongs to the object at ffff8881053b8d40 [ 25.303192] which belongs to the cache kmalloc-32 of size 32 [ 25.304618] The buggy address is located 16 bytes inside of [ 25.304618] freed 32-byte region [ffff8881053b8d40, ffff8881053b8d60) [ 25.305380] [ 25.305556] The buggy address belongs to the physical page: [ 25.306064] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1053b8 [ 25.306484] flags: 0x200000000000000(node=0|zone=2) [ 25.306712] page_type: f5(slab) [ 25.306854] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 25.307122] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 25.307410] page dumped because: kasan: bad access detected [ 25.307603] [ 25.307675] Memory state around the buggy address: [ 25.307861] ffff8881053b8c00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 25.308111] ffff8881053b8c80: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc [ 25.309611] >ffff8881053b8d00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 25.310658] ^ [ 25.311584] ffff8881053b8d80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 25.312549] ffff8881053b8e00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 25.314186] ==================================================================