Date
May 12, 2025, 11:48 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.042191] ================================================================== [ 19.042310] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 19.042711] Read of size 1 at addr fff00000c78896d0 by task kunit_try_catch/259 [ 19.043269] [ 19.043638] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT [ 19.043745] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.043775] Hardware name: linux,dummy-virt (DT) [ 19.043816] Call trace: [ 19.043844] show_stack+0x20/0x38 (C) [ 19.044105] dump_stack_lvl+0x8c/0xd0 [ 19.044372] print_report+0x118/0x608 [ 19.044452] kasan_report+0xdc/0x128 [ 19.044503] __asan_report_load1_noabort+0x20/0x30 [ 19.044562] strnlen+0x80/0x88 [ 19.044818] kasan_strings+0x478/0xb00 [ 19.044902] kunit_try_run_case+0x170/0x3f0 [ 19.044955] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.045008] kthread+0x328/0x630 [ 19.045066] ret_from_fork+0x10/0x20 [ 19.045418] [ 19.045468] Allocated by task 259: [ 19.045527] kasan_save_stack+0x3c/0x68 [ 19.045590] kasan_save_track+0x20/0x40 [ 19.045634] kasan_save_alloc_info+0x40/0x58 [ 19.045676] __kasan_kmalloc+0xd4/0xd8 [ 19.045713] __kmalloc_cache_noprof+0x15c/0x3c0 [ 19.045752] kasan_strings+0xc8/0xb00 [ 19.045788] kunit_try_run_case+0x170/0x3f0 [ 19.045824] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.045867] kthread+0x328/0x630 [ 19.046229] ret_from_fork+0x10/0x20 [ 19.046284] [ 19.046311] Freed by task 259: [ 19.046344] kasan_save_stack+0x3c/0x68 [ 19.046384] kasan_save_track+0x20/0x40 [ 19.046877] kasan_save_free_info+0x4c/0x78 [ 19.047224] __kasan_slab_free+0x6c/0x98 [ 19.047408] kfree+0x214/0x3c8 [ 19.047476] kasan_strings+0x24c/0xb00 [ 19.047537] kunit_try_run_case+0x170/0x3f0 [ 19.047591] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.047861] kthread+0x328/0x630 [ 19.047968] ret_from_fork+0x10/0x20 [ 19.048055] [ 19.048246] The buggy address belongs to the object at fff00000c78896c0 [ 19.048246] which belongs to the cache kmalloc-32 of size 32 [ 19.048329] The buggy address is located 16 bytes inside of [ 19.048329] freed 32-byte region [fff00000c78896c0, fff00000c78896e0) [ 19.048576] [ 19.048607] The buggy address belongs to the physical page: [ 19.048785] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107889 [ 19.048997] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.049062] page_type: f5(slab) [ 19.049328] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.049634] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.049683] page dumped because: kasan: bad access detected [ 19.049815] [ 19.049848] Memory state around the buggy address: [ 19.050017] fff00000c7889580: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.050082] fff00000c7889600: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 19.050155] >fff00000c7889680: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.050418] ^ [ 19.050539] fff00000c7889700: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.050613] fff00000c7889780: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.050666] ==================================================================
[ 19.058207] ================================================================== [ 19.058851] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 19.059407] Read of size 1 at addr ffff888102327750 by task kunit_try_catch/276 [ 19.060022] [ 19.060280] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT(voluntary) [ 19.060387] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.060414] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 19.060461] Call Trace: [ 19.060511] <TASK> [ 19.060553] dump_stack_lvl+0x73/0xb0 [ 19.060636] print_report+0xd1/0x650 [ 19.060722] ? __virt_addr_valid+0x1db/0x2d0 [ 19.060782] ? strnlen+0x73/0x80 [ 19.060844] ? kasan_complete_mode_report_info+0x64/0x200 [ 19.060893] ? strnlen+0x73/0x80 [ 19.060932] kasan_report+0x141/0x180 [ 19.060977] ? strnlen+0x73/0x80 [ 19.061028] __asan_report_load1_noabort+0x18/0x20 [ 19.061074] strnlen+0x73/0x80 [ 19.061120] kasan_strings+0x615/0xe80 [ 19.061161] ? trace_hardirqs_on+0x37/0xe0 [ 19.061213] ? __pfx_kasan_strings+0x10/0x10 [ 19.061253] ? finish_task_switch.isra.0+0x153/0x700 [ 19.061318] ? __switch_to+0x47/0xf50 [ 19.061377] ? __schedule+0x10cc/0x2b60 [ 19.061428] ? __pfx_read_tsc+0x10/0x10 [ 19.061468] ? ktime_get_ts64+0x86/0x230 [ 19.061497] kunit_try_run_case+0x1a5/0x480 [ 19.061526] ? __pfx_kunit_try_run_case+0x10/0x10 [ 19.061550] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 19.061577] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 19.061601] ? __kthread_parkme+0x82/0x180 [ 19.061624] ? preempt_count_sub+0x50/0x80 [ 19.061648] ? __pfx_kunit_try_run_case+0x10/0x10 [ 19.061733] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.061762] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 19.061787] kthread+0x337/0x6f0 [ 19.061809] ? trace_preempt_on+0x20/0xc0 [ 19.061833] ? __pfx_kthread+0x10/0x10 [ 19.061856] ? _raw_spin_unlock_irq+0x47/0x80 [ 19.061879] ? calculate_sigpending+0x7b/0xa0 [ 19.061906] ? __pfx_kthread+0x10/0x10 [ 19.061929] ret_from_fork+0x116/0x1d0 [ 19.061949] ? __pfx_kthread+0x10/0x10 [ 19.061971] ret_from_fork_asm+0x1a/0x30 [ 19.062004] </TASK> [ 19.062018] [ 19.074735] Allocated by task 276: [ 19.075085] kasan_save_stack+0x45/0x70 [ 19.075926] kasan_save_track+0x18/0x40 [ 19.076156] kasan_save_alloc_info+0x3b/0x50 [ 19.076503] __kasan_kmalloc+0xb7/0xc0 [ 19.077203] __kmalloc_cache_noprof+0x189/0x420 [ 19.077411] kasan_strings+0xc0/0xe80 [ 19.077750] kunit_try_run_case+0x1a5/0x480 [ 19.078319] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.078529] kthread+0x337/0x6f0 [ 19.078865] ret_from_fork+0x116/0x1d0 [ 19.079534] ret_from_fork_asm+0x1a/0x30 [ 19.079979] [ 19.080087] Freed by task 276: [ 19.080295] kasan_save_stack+0x45/0x70 [ 19.080846] kasan_save_track+0x18/0x40 [ 19.081051] kasan_save_free_info+0x3f/0x60 [ 19.081746] __kasan_slab_free+0x56/0x70 [ 19.081952] kfree+0x222/0x3f0 [ 19.082396] kasan_strings+0x2aa/0xe80 [ 19.083020] kunit_try_run_case+0x1a5/0x480 [ 19.083442] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.083671] kthread+0x337/0x6f0 [ 19.084174] ret_from_fork+0x116/0x1d0 [ 19.084542] ret_from_fork_asm+0x1a/0x30 [ 19.084950] [ 19.085090] The buggy address belongs to the object at ffff888102327740 [ 19.085090] which belongs to the cache kmalloc-32 of size 32 [ 19.085774] The buggy address is located 16 bytes inside of [ 19.085774] freed 32-byte region [ffff888102327740, ffff888102327760) [ 19.086504] [ 19.086705] The buggy address belongs to the physical page: [ 19.087174] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102327 [ 19.087606] flags: 0x200000000000000(node=0|zone=2) [ 19.088006] page_type: f5(slab) [ 19.088225] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 19.088799] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.089230] page dumped because: kasan: bad access detected [ 19.089643] [ 19.089836] Memory state around the buggy address: [ 19.090102] ffff888102327600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.090531] ffff888102327680: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.090972] >ffff888102327700: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.091437] ^ [ 19.091757] ffff888102327780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.092206] ffff888102327800: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.092553] ==================================================================