Date
May 13, 2025, 12:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.444366] ================================================================== [ 21.444430] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 21.444509] Read of size 1 at addr fff00000c7794c90 by task kunit_try_catch/259 [ 21.444566] [ 21.444619] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250513 #1 PREEMPT [ 21.444721] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.444754] Hardware name: linux,dummy-virt (DT) [ 21.444796] Call trace: [ 21.444827] show_stack+0x20/0x38 (C) [ 21.444890] dump_stack_lvl+0x8c/0xd0 [ 21.444941] print_report+0x118/0x608 [ 21.445011] kasan_report+0xdc/0x128 [ 21.445065] __asan_report_load1_noabort+0x20/0x30 [ 21.445120] strcmp+0xc0/0xc8 [ 21.445166] kasan_strings+0x340/0xb00 [ 21.445215] kunit_try_run_case+0x170/0x3f0 [ 21.445268] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.445326] kthread+0x328/0x630 [ 21.445837] ret_from_fork+0x10/0x20 [ 21.445940] [ 21.445984] Allocated by task 259: [ 21.446024] kasan_save_stack+0x3c/0x68 [ 21.446079] kasan_save_track+0x20/0x40 [ 21.446127] kasan_save_alloc_info+0x40/0x58 [ 21.446177] __kasan_kmalloc+0xd4/0xd8 [ 21.446222] __kmalloc_cache_noprof+0x15c/0x3c0 [ 21.446269] kasan_strings+0xc8/0xb00 [ 21.446689] kunit_try_run_case+0x170/0x3f0 [ 21.446812] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.446902] kthread+0x328/0x630 [ 21.446944] ret_from_fork+0x10/0x20 [ 21.447011] [ 21.447038] Freed by task 259: [ 21.447104] kasan_save_stack+0x3c/0x68 [ 21.447170] kasan_save_track+0x20/0x40 [ 21.447265] kasan_save_free_info+0x4c/0x78 [ 21.447306] __kasan_slab_free+0x6c/0x98 [ 21.447348] kfree+0x214/0x3c8 [ 21.447382] kasan_strings+0x24c/0xb00 [ 21.447422] kunit_try_run_case+0x170/0x3f0 [ 21.447460] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.447517] kthread+0x328/0x630 [ 21.447627] ret_from_fork+0x10/0x20 [ 21.447672] [ 21.447732] The buggy address belongs to the object at fff00000c7794c80 [ 21.447732] which belongs to the cache kmalloc-32 of size 32 [ 21.447817] The buggy address is located 16 bytes inside of [ 21.447817] freed 32-byte region [fff00000c7794c80, fff00000c7794ca0) [ 21.447944] [ 21.447992] The buggy address belongs to the physical page: [ 21.448106] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107794 [ 21.448177] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.448263] page_type: f5(slab) [ 21.448386] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 21.448451] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 21.448521] page dumped because: kasan: bad access detected [ 21.448604] [ 21.448659] Memory state around the buggy address: [ 21.448711] fff00000c7794b80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.448809] fff00000c7794c00: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.448912] >fff00000c7794c80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.449527] ^ [ 21.449671] fff00000c7794d00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.449896] fff00000c7794d80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.449950] ==================================================================
[ 13.047518] ================================================================== [ 13.048448] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 13.048798] Read of size 1 at addr ffff8881029e6650 by task kunit_try_catch/276 [ 13.049114] [ 13.049281] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250513 #1 PREEMPT(voluntary) [ 13.049342] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.049355] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.049387] Call Trace: [ 13.049401] <TASK> [ 13.049417] dump_stack_lvl+0x73/0xb0 [ 13.049446] print_report+0xd1/0x650 [ 13.049472] ? __virt_addr_valid+0x1db/0x2d0 [ 13.049510] ? strcmp+0xb0/0xc0 [ 13.049547] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.049572] ? strcmp+0xb0/0xc0 [ 13.049593] kasan_report+0x141/0x180 [ 13.049669] ? strcmp+0xb0/0xc0 [ 13.049718] __asan_report_load1_noabort+0x18/0x20 [ 13.049741] strcmp+0xb0/0xc0 [ 13.049764] kasan_strings+0x431/0xe80 [ 13.049794] ? trace_hardirqs_on+0x37/0xe0 [ 13.049820] ? __pfx_kasan_strings+0x10/0x10 [ 13.049841] ? finish_task_switch.isra.0+0x153/0x700 [ 13.049864] ? __switch_to+0x47/0xf50 [ 13.049892] ? __schedule+0x10cc/0x2b60 [ 13.049915] ? __pfx_read_tsc+0x10/0x10 [ 13.049937] ? ktime_get_ts64+0x86/0x230 [ 13.049962] kunit_try_run_case+0x1a5/0x480 [ 13.049987] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.050018] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.050042] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.050063] ? __kthread_parkme+0x82/0x180 [ 13.050094] ? preempt_count_sub+0x50/0x80 [ 13.050118] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.050143] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.050165] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.050198] kthread+0x337/0x6f0 [ 13.050218] ? trace_preempt_on+0x20/0xc0 [ 13.050249] ? __pfx_kthread+0x10/0x10 [ 13.050271] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.050291] ? calculate_sigpending+0x7b/0xa0 [ 13.050327] ? __pfx_kthread+0x10/0x10 [ 13.050348] ret_from_fork+0x116/0x1d0 [ 13.050367] ? __pfx_kthread+0x10/0x10 [ 13.050387] ret_from_fork_asm+0x1a/0x30 [ 13.050419] </TASK> [ 13.050431] [ 13.058970] Allocated by task 276: [ 13.059173] kasan_save_stack+0x45/0x70 [ 13.059373] kasan_save_track+0x18/0x40 [ 13.059560] kasan_save_alloc_info+0x3b/0x50 [ 13.059896] __kasan_kmalloc+0xb7/0xc0 [ 13.060029] __kmalloc_cache_noprof+0x189/0x420 [ 13.060342] kasan_strings+0xc0/0xe80 [ 13.060569] kunit_try_run_case+0x1a5/0x480 [ 13.060810] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.061018] kthread+0x337/0x6f0 [ 13.061195] ret_from_fork+0x116/0x1d0 [ 13.061366] ret_from_fork_asm+0x1a/0x30 [ 13.061665] [ 13.061747] Freed by task 276: [ 13.061914] kasan_save_stack+0x45/0x70 [ 13.062097] kasan_save_track+0x18/0x40 [ 13.062306] kasan_save_free_info+0x3f/0x60 [ 13.062501] __kasan_slab_free+0x56/0x70 [ 13.062910] kfree+0x222/0x3f0 [ 13.063046] kasan_strings+0x2aa/0xe80 [ 13.063218] kunit_try_run_case+0x1a5/0x480 [ 13.063530] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.063868] kthread+0x337/0x6f0 [ 13.063987] ret_from_fork+0x116/0x1d0 [ 13.064112] ret_from_fork_asm+0x1a/0x30 [ 13.064244] [ 13.064335] The buggy address belongs to the object at ffff8881029e6640 [ 13.064335] which belongs to the cache kmalloc-32 of size 32 [ 13.065049] The buggy address is located 16 bytes inside of [ 13.065049] freed 32-byte region [ffff8881029e6640, ffff8881029e6660) [ 13.065572] [ 13.065735] The buggy address belongs to the physical page: [ 13.065965] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029e6 [ 13.066208] flags: 0x200000000000000(node=0|zone=2) [ 13.066396] page_type: f5(slab) [ 13.066586] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.066943] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.067283] page dumped because: kasan: bad access detected [ 13.067580] [ 13.067719] Memory state around the buggy address: [ 13.067964] ffff8881029e6500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.068289] ffff8881029e6580: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.068589] >ffff8881029e6600: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.068913] ^ [ 13.069159] ffff8881029e6680: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.069509] ffff8881029e6700: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.069936] ==================================================================