Date
July 11, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.048698] ================================================================== [ 19.048781] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 19.048891] Read of size 1 at addr fff00000c5908250 by task kunit_try_catch/260 [ 19.048945] [ 19.048980] CPU: 1 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.049192] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.049230] Hardware name: linux,dummy-virt (DT) [ 19.049264] Call trace: [ 19.049327] show_stack+0x20/0x38 (C) [ 19.049377] dump_stack_lvl+0x8c/0xd0 [ 19.049426] print_report+0x118/0x608 [ 19.049602] kasan_report+0xdc/0x128 [ 19.049708] __asan_report_load1_noabort+0x20/0x30 [ 19.049764] strnlen+0x80/0x88 [ 19.049809] kasan_strings+0x478/0xb00 [ 19.049976] kunit_try_run_case+0x170/0x3f0 [ 19.050062] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.050116] kthread+0x328/0x630 [ 19.050161] ret_from_fork+0x10/0x20 [ 19.050214] [ 19.050263] Allocated by task 260: [ 19.050308] kasan_save_stack+0x3c/0x68 [ 19.050352] kasan_save_track+0x20/0x40 [ 19.050390] kasan_save_alloc_info+0x40/0x58 [ 19.050432] __kasan_kmalloc+0xd4/0xd8 [ 19.050606] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.050885] kthread+0x328/0x630 [ 19.052562] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.058073] not ok 62 kasan_strings [ 19.061539] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.062073] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.062598] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.063685] fff00000c5857e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.065323] CPU: 1 UID: 0 PID: 262 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.067259] kasan_bitops_generic+0xa0/0x1c8 [ 19.068797] page_type: f5(slab) [ 19.070427] ^ [ 19.072051] Call trace: [ 19.074532] [ 19.075277] page dumped because: kasan: bad access detected [ 19.075499] ^ [ 19.076210] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.076295] show_stack+0x20/0x38 (C) [ 19.076774] kthread+0x328/0x630 [ 19.076921] Allocated by task 262: [ 19.077108] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.077432] The buggy address is located 8 bytes inside of [ 19.077432] allocated 9-byte region [fff00000c5857dc0, fff00000c5857dc9) [ 19.077804] page dumped because: kasan: bad access detected [ 19.079289] ^ [ 19.079363] fff00000c5857e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.080565] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.080618] Hardware name: linux,dummy-virt (DT) [ 19.080902] kasan_report+0xdc/0x128 [ 19.081590] kthread+0x328/0x630 [ 19.081965] kasan_save_stack+0x3c/0x68 [ 19.082435] kthread+0x328/0x630 [ 19.083048] [ 19.083125] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105857 [ 19.083901] fff00000c5857c80: 00 04 fc fc 00 04 fc fc fa fb fc fc 00 05 fc fc [ 19.084333] >fff00000c5857d80: 00 00 fc fc fa fb fc fc 00 01 fc fc fc fc fc fc [ 19.084436] ^ [ 19.084512] fff00000c5857e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.085497] [ 19.085956] Call trace: [ 19.086437] __kasan_check_write+0x20/0x30 [ 19.086816] ret_from_fork+0x10/0x20 [ 19.089809] >fff00000c5857d80: 00 00 fc fc fa fb fc fc 00 01 fc fc fc fc fc fc [ 19.090069] fff00000c5857e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.091241] ==================================================================
[ 14.411535] ================================================================== [ 14.412181] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 14.412623] Read of size 1 at addr ffff888102a16ad0 by task kunit_try_catch/276 [ 14.412844] [ 14.412999] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.413132] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.413145] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.413164] Call Trace: [ 14.413177] <TASK> [ 14.413191] dump_stack_lvl+0x73/0xb0 [ 14.413219] print_report+0xd1/0x650 [ 14.413240] ? __virt_addr_valid+0x1db/0x2d0 [ 14.413264] ? strnlen+0x73/0x80 [ 14.413280] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.413304] ? strnlen+0x73/0x80 [ 14.413322] kasan_report+0x141/0x180 [ 14.413344] ? strnlen+0x73/0x80 [ 14.413367] __asan_report_load1_noabort+0x18/0x20 [ 14.413391] strnlen+0x73/0x80 [ 14.413409] kasan_strings+0x615/0xe80 [ 14.413428] ? trace_hardirqs_on+0x37/0xe0 [ 14.413451] ? __pfx_kasan_strings+0x10/0x10 [ 14.413471] ? finish_task_switch.isra.0+0x153/0x700 [ 14.413493] ? __switch_to+0x47/0xf50 [ 14.413517] ? __schedule+0x10cc/0x2b60 [ 14.413609] ? __pfx_read_tsc+0x10/0x10 [ 14.413631] ? ktime_get_ts64+0x86/0x230 [ 14.413655] kunit_try_run_case+0x1a5/0x480 [ 14.413680] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.413703] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.413726] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.413769] ? __kthread_parkme+0x82/0x180 [ 14.413789] ? preempt_count_sub+0x50/0x80 [ 14.413812] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.413870] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.413895] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.413929] kthread+0x337/0x6f0 [ 14.413948] ? trace_preempt_on+0x20/0xc0 [ 14.413970] ? __pfx_kthread+0x10/0x10 [ 14.414089] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.414114] ? calculate_sigpending+0x7b/0xa0 [ 14.414139] ? __pfx_kthread+0x10/0x10 [ 14.414161] ret_from_fork+0x116/0x1d0 [ 14.414180] ? __pfx_kthread+0x10/0x10 [ 14.414201] ret_from_fork_asm+0x1a/0x30 [ 14.414232] </TASK> [ 14.414241] [ 14.422678] Allocated by task 276: [ 14.422899] kasan_save_stack+0x45/0x70 [ 14.423184] kasan_save_track+0x18/0x40 [ 14.423409] kasan_save_alloc_info+0x3b/0x50 [ 14.423621] __kasan_kmalloc+0xb7/0xc0 [ 14.423851] __kmalloc_cache_noprof+0x189/0x420 [ 14.424284] kasan_strings+0xc0/0xe80 [ 14.424431] kunit_try_run_case+0x1a5/0x480 [ 14.424573] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.424883] kthread+0x337/0x6f0 [ 14.425196] ret_from_fork+0x116/0x1d0 [ 14.425385] ret_from_fork_asm+0x1a/0x30 [ 14.425600] [ 14.425695] Freed by task 276: [ 14.425887] kasan_save_stack+0x45/0x70 [ 14.426192] kasan_save_track+0x18/0x40 [ 14.426421] kasan_save_free_info+0x3f/0x60 [ 14.426650] __kasan_slab_free+0x56/0x70 [ 14.426877] kfree+0x222/0x3f0 [ 14.427138] kasan_strings+0x2aa/0xe80 [ 14.427344] kunit_try_run_case+0x1a5/0x480 [ 14.427569] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.427854] kthread+0x337/0x6f0 [ 14.428231] ret_from_fork+0x116/0x1d0 [ 14.428390] ret_from_fork_asm+0x1a/0x30 [ 14.428623] [ 14.428712] The buggy address belongs to the object at ffff888102a16ac0 [ 14.428712] which belongs to the cache kmalloc-32 of size 32 [ 14.429385] The buggy address is located 16 bytes inside of [ 14.429385] freed 32-byte region [ffff888102a16ac0, ffff888102a16ae0) [ 14.429973] [ 14.430165] The buggy address belongs to the physical page: [ 14.430417] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a16 [ 14.430763] flags: 0x200000000000000(node=0|zone=2) [ 14.431050] page_type: f5(slab) [ 14.431221] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.431492] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.431836] page dumped because: kasan: bad access detected [ 14.432106] [ 14.432191] Memory state around the buggy address: [ 14.432404] ffff888102a16980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.432705] ffff888102a16a00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.433227] >ffff888102a16a80: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.433570] ^ [ 14.433804] ffff888102a16b00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.434173] ffff888102a16b80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.434544] ==================================================================