Date
June 7, 2025, 10:40 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 24.189296] ================================================================== [ 24.189443] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 24.189553] Read of size 1 at addr fff00000c7774000 by task kunit_try_catch/217 [ 24.189616] [ 24.189672] CPU: 1 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.15.2-rc1 #1 PREEMPT [ 24.189778] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.189810] Hardware name: linux,dummy-virt (DT) [ 24.189849] Call trace: [ 24.189883] show_stack+0x20/0x38 (C) [ 24.189948] dump_stack_lvl+0x8c/0xd0 [ 24.190011] print_report+0x118/0x608 [ 24.190063] kasan_report+0xdc/0x128 [ 24.190113] __asan_report_load1_noabort+0x20/0x30 [ 24.190171] kmem_cache_rcu_uaf+0x388/0x468 [ 24.190227] kunit_try_run_case+0x170/0x3f0 [ 24.190286] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.190382] kthread+0x328/0x630 [ 24.191651] ret_from_fork+0x10/0x20 [ 24.191885] [ 24.191936] Allocated by task 217: [ 24.192035] kasan_save_stack+0x3c/0x68 [ 24.192159] kasan_save_track+0x20/0x40 [ 24.192315] kasan_save_alloc_info+0x40/0x58 [ 24.192424] __kasan_slab_alloc+0xa8/0xb0 [ 24.192759] kmem_cache_alloc_noprof+0x10c/0x398 [ 24.192939] kmem_cache_rcu_uaf+0x12c/0x468 [ 24.193036] kunit_try_run_case+0x170/0x3f0 [ 24.193462] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.193587] kthread+0x328/0x630 [ 24.193687] ret_from_fork+0x10/0x20 [ 24.193879] [ 24.193958] Freed by task 0: [ 24.194344] kasan_save_stack+0x3c/0x68 [ 24.194470] kasan_save_track+0x20/0x40 [ 24.194685] kasan_save_free_info+0x4c/0x78 [ 24.195012] __kasan_slab_free+0x6c/0x98 [ 24.195115] slab_free_after_rcu_debug+0xd4/0x2f8 [ 24.195196] rcu_core+0x9f4/0x1e20 [ 24.195271] rcu_core_si+0x18/0x30 [ 24.195340] handle_softirqs+0x374/0xb28 [ 24.195436] __do_softirq+0x1c/0x28 [ 24.195520] [ 24.195564] Last potentially related work creation: [ 24.195618] kasan_save_stack+0x3c/0x68 [ 24.195700] kasan_record_aux_stack+0xb4/0xc8 [ 24.195778] kmem_cache_free+0x120/0x468 [ 24.195856] kmem_cache_rcu_uaf+0x16c/0x468 [ 24.195943] kunit_try_run_case+0x170/0x3f0 [ 24.196035] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.196134] kthread+0x328/0x630 [ 24.196210] ret_from_fork+0x10/0x20 [ 24.196290] [ 24.196336] The buggy address belongs to the object at fff00000c7774000 [ 24.196336] which belongs to the cache test_cache of size 200 [ 24.196536] The buggy address is located 0 bytes inside of [ 24.196536] freed 200-byte region [fff00000c7774000, fff00000c77740c8) [ 24.196777] [ 24.196829] The buggy address belongs to the physical page: [ 24.196908] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107774 [ 24.197043] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 24.197161] page_type: f5(slab) [ 24.197259] raw: 0bfffe0000000000 fff00000c56b5500 dead000000000122 0000000000000000 [ 24.197359] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 24.197491] page dumped because: kasan: bad access detected [ 24.197573] [ 24.197616] Memory state around the buggy address: [ 24.197741] fff00000c7773f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.197885] fff00000c7773f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.198042] >fff00000c7774000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.198142] ^ [ 24.198691] fff00000c7774080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.198945] fff00000c7774100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.199071] ==================================================================
[ 14.722289] ================================================================== [ 14.723116] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.723362] Read of size 1 at addr ffff8881033ad000 by task kunit_try_catch/233 [ 14.723842] [ 14.724000] CPU: 0 UID: 0 PID: 233 Comm: kunit_try_catch Tainted: G B N 6.15.2-rc1 #1 PREEMPT(voluntary) [ 14.724063] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.724077] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.724100] Call Trace: [ 14.724117] <TASK> [ 14.724139] dump_stack_lvl+0x73/0xb0 [ 14.724174] print_report+0xd1/0x650 [ 14.724199] ? __virt_addr_valid+0x1db/0x2d0 [ 14.724225] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.724245] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.724268] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.724288] kasan_report+0x141/0x180 [ 14.724312] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.724336] __asan_report_load1_noabort+0x18/0x20 [ 14.724702] kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.724730] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 14.724751] ? finish_task_switch.isra.0+0x153/0x700 [ 14.724780] ? __switch_to+0x5d9/0xf60 [ 14.724804] ? dequeue_task_fair+0x166/0x4e0 [ 14.724832] ? __pfx_read_tsc+0x10/0x10 [ 14.724871] ? ktime_get_ts64+0x86/0x230 [ 14.724896] ? irqentry_exit+0x2a/0x60 [ 14.724923] kunit_try_run_case+0x1a5/0x480 [ 14.724952] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.724975] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.725001] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.725025] ? __kthread_parkme+0x82/0x180 [ 14.725049] ? preempt_count_sub+0x50/0x80 [ 14.725074] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.725099] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.725124] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.725147] kthread+0x337/0x6f0 [ 14.725164] ? trace_preempt_on+0x20/0xc0 [ 14.725190] ? __pfx_kthread+0x10/0x10 [ 14.725210] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.725231] ? calculate_sigpending+0x7b/0xa0 [ 14.725255] ? __pfx_kthread+0x10/0x10 [ 14.725274] ret_from_fork+0x41/0x80 [ 14.725297] ? __pfx_kthread+0x10/0x10 [ 14.725316] ret_from_fork_asm+0x1a/0x30 [ 14.725348] </TASK> [ 14.725362] [ 14.733208] Allocated by task 233: [ 14.733484] kasan_save_stack+0x45/0x70 [ 14.733935] kasan_save_track+0x18/0x40 [ 14.734141] kasan_save_alloc_info+0x3b/0x50 [ 14.734329] __kasan_slab_alloc+0x91/0xa0 [ 14.734493] kmem_cache_alloc_noprof+0x123/0x3f0 [ 14.734742] kmem_cache_rcu_uaf+0x155/0x510 [ 14.735004] kunit_try_run_case+0x1a5/0x480 [ 14.735277] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.735471] kthread+0x337/0x6f0 [ 14.735739] ret_from_fork+0x41/0x80 [ 14.735850] ret_from_fork_asm+0x1a/0x30 [ 14.735962] [ 14.736020] Freed by task 0: [ 14.736236] kasan_save_stack+0x45/0x70 [ 14.736513] kasan_save_track+0x18/0x40 [ 14.736862] kasan_save_free_info+0x3f/0x60 [ 14.736979] __kasan_slab_free+0x56/0x70 [ 14.737237] slab_free_after_rcu_debug+0xe4/0x310 [ 14.737524] rcu_core+0x66c/0x1c30 [ 14.737979] rcu_core_si+0x12/0x20 [ 14.738221] handle_softirqs+0x209/0x730 [ 14.738340] __irq_exit_rcu+0xc9/0x110 [ 14.738585] irq_exit_rcu+0x12/0x20 [ 14.738973] sysvec_apic_timer_interrupt+0x81/0x90 [ 14.739195] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 14.739423] [ 14.739556] Last potentially related work creation: [ 14.739797] kasan_save_stack+0x45/0x70 [ 14.739916] kasan_record_aux_stack+0xb2/0xc0 [ 14.740035] kmem_cache_free+0x131/0x420 [ 14.740325] kmem_cache_rcu_uaf+0x194/0x510 [ 14.740740] kunit_try_run_case+0x1a5/0x480 [ 14.740982] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.741182] kthread+0x337/0x6f0 [ 14.741340] ret_from_fork+0x41/0x80 [ 14.741510] ret_from_fork_asm+0x1a/0x30 [ 14.742101] [ 14.742259] The buggy address belongs to the object at ffff8881033ad000 [ 14.742259] which belongs to the cache test_cache of size 200 [ 14.743037] The buggy address is located 0 bytes inside of [ 14.743037] freed 200-byte region [ffff8881033ad000, ffff8881033ad0c8) [ 14.743829] [ 14.743902] The buggy address belongs to the physical page: [ 14.744300] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1033ad [ 14.744683] flags: 0x200000000000000(node=0|zone=2) [ 14.744968] page_type: f5(slab) [ 14.745199] raw: 0200000000000000 ffff8881033a9140 dead000000000122 0000000000000000 [ 14.745577] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 14.746145] page dumped because: kasan: bad access detected [ 14.746464] [ 14.746555] Memory state around the buggy address: [ 14.746809] ffff8881033acf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.747075] ffff8881033acf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.747267] >ffff8881033ad000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.747731] ^ [ 14.747899] ffff8881033ad080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 14.748204] ffff8881033ad100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.748543] ==================================================================