Date
May 26, 2025, 9:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.342880] ================================================================== [ 20.342995] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 20.343103] Read of size 1 at addr fff00000c7896b90 by task kunit_try_catch/259 [ 20.343215] [ 20.343287] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7-next-20250526 #1 PREEMPT [ 20.343493] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.343558] Hardware name: linux,dummy-virt (DT) [ 20.343628] Call trace: [ 20.343680] show_stack+0x20/0x38 (C) [ 20.343791] dump_stack_lvl+0x8c/0xd0 [ 20.343895] print_report+0x118/0x608 [ 20.344002] kasan_report+0xdc/0x128 [ 20.344106] __asan_report_load1_noabort+0x20/0x30 [ 20.344222] strnlen+0x80/0x88 [ 20.344802] kasan_strings+0x478/0xb00 [ 20.344972] kunit_try_run_case+0x170/0x3f0 [ 20.345096] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.345358] kthread+0x328/0x630 [ 20.345513] ret_from_fork+0x10/0x20 [ 20.345778] [ 20.345825] Allocated by task 259: [ 20.345890] kasan_save_stack+0x3c/0x68 [ 20.345993] kasan_save_track+0x20/0x40 [ 20.346094] kasan_save_alloc_info+0x40/0x58 [ 20.346170] __kasan_kmalloc+0xd4/0xd8 [ 20.346228] __kmalloc_cache_noprof+0x15c/0x3c0 [ 20.346294] kasan_strings+0xc8/0xb00 [ 20.346377] kunit_try_run_case+0x170/0x3f0 [ 20.346485] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.346618] kthread+0x328/0x630 [ 20.346693] ret_from_fork+0x10/0x20 [ 20.346776] [ 20.346814] Freed by task 259: [ 20.346875] kasan_save_stack+0x3c/0x68 [ 20.347233] kasan_save_track+0x20/0x40 [ 20.347405] kasan_save_free_info+0x4c/0x78 [ 20.347497] __kasan_slab_free+0x6c/0x98 [ 20.347579] kfree+0x214/0x3c8 [ 20.347649] kasan_strings+0x24c/0xb00 [ 20.347716] kunit_try_run_case+0x170/0x3f0 [ 20.347779] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.347865] kthread+0x328/0x630 [ 20.347932] ret_from_fork+0x10/0x20 [ 20.348012] [ 20.348058] The buggy address belongs to the object at fff00000c7896b80 [ 20.348058] which belongs to the cache kmalloc-32 of size 32 [ 20.348186] The buggy address is located 16 bytes inside of [ 20.348186] freed 32-byte region [fff00000c7896b80, fff00000c7896ba0) [ 20.348336] [ 20.348378] The buggy address belongs to the physical page: [ 20.348446] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107896 [ 20.348883] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.349007] page_type: f5(slab) [ 20.349133] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.349247] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.349347] page dumped because: kasan: bad access detected [ 20.349432] [ 20.349495] Memory state around the buggy address: [ 20.349594] fff00000c7896a80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.349729] fff00000c7896b00: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.349831] >fff00000c7896b80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.349935] ^ [ 20.350005] fff00000c7896c00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.350100] fff00000c7896c80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.350188] ==================================================================
[ 13.025438] ================================================================== [ 13.025809] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 13.026261] Read of size 1 at addr ffff8881039b9850 by task kunit_try_catch/277 [ 13.026580] [ 13.026666] CPU: 1 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7-next-20250526 #1 PREEMPT(voluntary) [ 13.026711] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.026774] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.026798] Call Trace: [ 13.026815] <TASK> [ 13.026831] dump_stack_lvl+0x73/0xb0 [ 13.026859] print_report+0xd1/0x650 [ 13.026882] ? __virt_addr_valid+0x1db/0x2d0 [ 13.026905] ? strnlen+0x73/0x80 [ 13.026924] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.026948] ? strnlen+0x73/0x80 [ 13.026969] kasan_report+0x141/0x180 [ 13.026993] ? strnlen+0x73/0x80 [ 13.027017] __asan_report_load1_noabort+0x18/0x20 [ 13.027038] strnlen+0x73/0x80 [ 13.027059] kasan_strings+0x615/0xe80 [ 13.027080] ? trace_hardirqs_on+0x37/0xe0 [ 13.027103] ? __pfx_kasan_strings+0x10/0x10 [ 13.027124] ? finish_task_switch.isra.0+0x153/0x700 [ 13.027146] ? __switch_to+0x47/0xf50 [ 13.027171] ? __schedule+0x10cc/0x2b60 [ 13.027195] ? __pfx_read_tsc+0x10/0x10 [ 13.027216] ? ktime_get_ts64+0x86/0x230 [ 13.027241] kunit_try_run_case+0x1a5/0x480 [ 13.027263] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.027282] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.027474] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.027504] ? __kthread_parkme+0x82/0x180 [ 13.027525] ? preempt_count_sub+0x50/0x80 [ 13.027548] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.027569] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.027594] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.027618] kthread+0x337/0x6f0 [ 13.027637] ? trace_preempt_on+0x20/0xc0 [ 13.027660] ? __pfx_kthread+0x10/0x10 [ 13.027680] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.027704] ? calculate_sigpending+0x7b/0xa0 [ 13.027728] ? __pfx_kthread+0x10/0x10 [ 13.027750] ret_from_fork+0x116/0x1d0 [ 13.027776] ? __pfx_kthread+0x10/0x10 [ 13.027797] ret_from_fork_asm+0x1a/0x30 [ 13.027827] </TASK> [ 13.027839] [ 13.036225] Allocated by task 277: [ 13.036428] kasan_save_stack+0x45/0x70 [ 13.036634] kasan_save_track+0x18/0x40 [ 13.036839] kasan_save_alloc_info+0x3b/0x50 [ 13.037075] __kasan_kmalloc+0xb7/0xc0 [ 13.037233] __kmalloc_cache_noprof+0x189/0x420 [ 13.037471] kasan_strings+0xc0/0xe80 [ 13.037621] kunit_try_run_case+0x1a5/0x480 [ 13.037764] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.038010] kthread+0x337/0x6f0 [ 13.038188] ret_from_fork+0x116/0x1d0 [ 13.038388] ret_from_fork_asm+0x1a/0x30 [ 13.038594] [ 13.038689] Freed by task 277: [ 13.038854] kasan_save_stack+0x45/0x70 [ 13.039032] kasan_save_track+0x18/0x40 [ 13.039329] kasan_save_free_info+0x3f/0x60 [ 13.039494] __kasan_slab_free+0x56/0x70 [ 13.039690] kfree+0x222/0x3f0 [ 13.039859] kasan_strings+0x2aa/0xe80 [ 13.040130] kunit_try_run_case+0x1a5/0x480 [ 13.040419] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.040648] kthread+0x337/0x6f0 [ 13.040873] ret_from_fork+0x116/0x1d0 [ 13.041028] ret_from_fork_asm+0x1a/0x30 [ 13.041285] [ 13.041357] The buggy address belongs to the object at ffff8881039b9840 [ 13.041357] which belongs to the cache kmalloc-32 of size 32 [ 13.041953] The buggy address is located 16 bytes inside of [ 13.041953] freed 32-byte region [ffff8881039b9840, ffff8881039b9860) [ 13.042321] [ 13.042411] The buggy address belongs to the physical page: [ 13.042670] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039b9 [ 13.043483] flags: 0x200000000000000(node=0|zone=2) [ 13.043704] page_type: f5(slab) [ 13.043885] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.044224] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.044653] page dumped because: kasan: bad access detected [ 13.044931] [ 13.045066] Memory state around the buggy address: [ 13.045235] ffff8881039b9700: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.045466] ffff8881039b9780: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.045899] >ffff8881039b9800: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.046285] ^ [ 13.046477] ffff8881039b9880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.046777] ffff8881039b9900: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.047198] ==================================================================