Date
July 17, 2025, 10:12 a.m.
Environment | |
---|---|
qemu-arm64 | |
qemu-x86_64 |
[ 30.920918] ================================================================== [ 30.921024] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 30.921122] Read of size 1 at addr fff00000c9b29000 by task kunit_try_catch/244 [ 30.921174] [ 30.921217] CPU: 1 UID: 0 PID: 244 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250717 #1 PREEMPT [ 30.921305] Tainted: [B]=BAD_PAGE, [N]=TEST [ 30.921332] Hardware name: linux,dummy-virt (DT) [ 30.921367] Call trace: [ 30.921394] show_stack+0x20/0x38 (C) [ 30.921448] dump_stack_lvl+0x8c/0xd0 [ 30.921502] print_report+0x118/0x5d0 [ 30.921548] kasan_report+0xdc/0x128 [ 30.921592] __asan_report_load1_noabort+0x20/0x30 [ 30.921642] kmem_cache_rcu_uaf+0x388/0x468 [ 30.921690] kunit_try_run_case+0x170/0x3f0 [ 30.921740] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 30.921793] kthread+0x328/0x630 [ 30.921838] ret_from_fork+0x10/0x20 [ 30.921889] [ 30.921907] Allocated by task 244: [ 30.921939] kasan_save_stack+0x3c/0x68 [ 30.921979] kasan_save_track+0x20/0x40 [ 30.922013] kasan_save_alloc_info+0x40/0x58 [ 30.922051] __kasan_slab_alloc+0xa8/0xb0 [ 30.922152] kmem_cache_alloc_noprof+0x10c/0x398 [ 30.922197] kmem_cache_rcu_uaf+0x12c/0x468 [ 30.922235] kunit_try_run_case+0x170/0x3f0 [ 30.922272] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 30.922315] kthread+0x328/0x630 [ 30.922348] ret_from_fork+0x10/0x20 [ 30.922385] [ 30.922405] Freed by task 0: [ 30.922431] kasan_save_stack+0x3c/0x68 [ 30.922468] kasan_save_track+0x20/0x40 [ 30.922501] kasan_save_free_info+0x4c/0x78 [ 30.922538] __kasan_slab_free+0x6c/0x98 [ 30.922572] slab_free_after_rcu_debug+0xd4/0x2f8 [ 30.922613] rcu_core+0x9f4/0x1e58 [ 30.922650] rcu_core_si+0x18/0x30 [ 30.922686] handle_softirqs+0x374/0xb28 [ 30.922725] __do_softirq+0x1c/0x28 [ 30.922757] [ 30.922790] Last potentially related work creation: [ 30.922815] kasan_save_stack+0x3c/0x68 [ 30.922852] kasan_record_aux_stack+0xb4/0xc8 [ 30.922889] kmem_cache_free+0x120/0x468 [ 30.922928] kmem_cache_rcu_uaf+0x16c/0x468 [ 30.922967] kunit_try_run_case+0x170/0x3f0 [ 30.923004] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 30.923046] kthread+0x328/0x630 [ 30.923091] ret_from_fork+0x10/0x20 [ 30.923125] [ 30.923143] The buggy address belongs to the object at fff00000c9b29000 [ 30.923143] which belongs to the cache test_cache of size 200 [ 30.923203] The buggy address is located 0 bytes inside of [ 30.923203] freed 200-byte region [fff00000c9b29000, fff00000c9b290c8) [ 30.923265] [ 30.923294] The buggy address belongs to the physical page: [ 30.923329] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109b29 [ 30.923388] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 30.923441] page_type: f5(slab) [ 30.923485] raw: 0bfffe0000000000 fff00000c5817500 dead000000000122 0000000000000000 [ 30.923536] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 30.923577] page dumped because: kasan: bad access detected [ 30.923609] [ 30.923628] Memory state around the buggy address: [ 30.923662] fff00000c9b28f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.923706] fff00000c9b28f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.923749] >fff00000c9b29000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.923788] ^ [ 30.923816] fff00000c9b29080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.923858] fff00000c9b29100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.923897] ==================================================================
[ 26.456414] ================================================================== [ 26.456849] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 26.457110] Read of size 1 at addr ffff888106182000 by task kunit_try_catch/262 [ 26.457349] [ 26.457436] CPU: 0 UID: 0 PID: 262 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250717 #1 PREEMPT(voluntary) [ 26.457491] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.457503] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.457526] Call Trace: [ 26.457540] <TASK> [ 26.457624] dump_stack_lvl+0x73/0xb0 [ 26.457660] print_report+0xd1/0x610 [ 26.457685] ? __virt_addr_valid+0x1db/0x2d0 [ 26.457712] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 26.457735] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.457762] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 26.457786] kasan_report+0x141/0x180 [ 26.457808] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 26.457836] __asan_report_load1_noabort+0x18/0x20 [ 26.457861] kmem_cache_rcu_uaf+0x3e3/0x510 [ 26.457885] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 26.457908] ? finish_task_switch.isra.0+0x153/0x700 [ 26.457935] ? __switch_to+0x47/0xf80 [ 26.457967] ? __pfx_read_tsc+0x10/0x10 [ 26.457989] ? ktime_get_ts64+0x86/0x230 [ 26.458017] kunit_try_run_case+0x1a5/0x480 [ 26.458043] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.458065] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 26.458102] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 26.458126] ? __kthread_parkme+0x82/0x180 [ 26.458153] ? preempt_count_sub+0x50/0x80 [ 26.458176] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.458221] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.458263] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 26.458287] kthread+0x337/0x6f0 [ 26.458307] ? trace_preempt_on+0x20/0xc0 [ 26.458339] ? __pfx_kthread+0x10/0x10 [ 26.458360] ? _raw_spin_unlock_irq+0x47/0x80 [ 26.458382] ? calculate_sigpending+0x7b/0xa0 [ 26.458408] ? __pfx_kthread+0x10/0x10 [ 26.458429] ret_from_fork+0x116/0x1d0 [ 26.458449] ? __pfx_kthread+0x10/0x10 [ 26.458469] ret_from_fork_asm+0x1a/0x30 [ 26.458522] </TASK> [ 26.458533] [ 26.468731] Allocated by task 262: [ 26.468892] kasan_save_stack+0x45/0x70 [ 26.469074] kasan_save_track+0x18/0x40 [ 26.469241] kasan_save_alloc_info+0x3b/0x50 [ 26.469506] __kasan_slab_alloc+0x91/0xa0 [ 26.469728] kmem_cache_alloc_noprof+0x123/0x3f0 [ 26.469934] kmem_cache_rcu_uaf+0x155/0x510 [ 26.470165] kunit_try_run_case+0x1a5/0x480 [ 26.470405] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.470845] kthread+0x337/0x6f0 [ 26.471015] ret_from_fork+0x116/0x1d0 [ 26.471201] ret_from_fork_asm+0x1a/0x30 [ 26.471531] [ 26.471625] Freed by task 0: [ 26.471756] kasan_save_stack+0x45/0x70 [ 26.471918] kasan_save_track+0x18/0x40 [ 26.472124] kasan_save_free_info+0x3f/0x60 [ 26.472363] __kasan_slab_free+0x56/0x70 [ 26.472635] slab_free_after_rcu_debug+0xe4/0x310 [ 26.472860] rcu_core+0x66f/0x1c40 [ 26.473054] rcu_core_si+0x12/0x20 [ 26.473255] handle_softirqs+0x209/0x730 [ 26.473460] __irq_exit_rcu+0xc9/0x110 [ 26.473639] irq_exit_rcu+0x12/0x20 [ 26.473815] sysvec_apic_timer_interrupt+0x81/0x90 [ 26.474018] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 26.474454] [ 26.474559] Last potentially related work creation: [ 26.474709] kasan_save_stack+0x45/0x70 [ 26.474885] kasan_record_aux_stack+0xb2/0xc0 [ 26.475109] kmem_cache_free+0x131/0x420 [ 26.475568] kmem_cache_rcu_uaf+0x194/0x510 [ 26.475965] kunit_try_run_case+0x1a5/0x480 [ 26.476518] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.477275] kthread+0x337/0x6f0 [ 26.477508] ret_from_fork+0x116/0x1d0 [ 26.477650] ret_from_fork_asm+0x1a/0x30 [ 26.478069] [ 26.478175] The buggy address belongs to the object at ffff888106182000 [ 26.478175] which belongs to the cache test_cache of size 200 [ 26.479066] The buggy address is located 0 bytes inside of [ 26.479066] freed 200-byte region [ffff888106182000, ffff8881061820c8) [ 26.479854] [ 26.480134] The buggy address belongs to the physical page: [ 26.480513] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106182 [ 26.480858] flags: 0x200000000000000(node=0|zone=2) [ 26.481068] page_type: f5(slab) [ 26.481244] raw: 0200000000000000 ffff888101e9e640 dead000000000122 0000000000000000 [ 26.481856] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 26.482292] page dumped because: kasan: bad access detected [ 26.482721] [ 26.483052] Memory state around the buggy address: [ 26.483285] ffff888106181f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.483659] ffff888106181f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.484096] >ffff888106182000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.484671] ^ [ 26.484815] ffff888106182080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 26.485280] ffff888106182100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.485738] ==================================================================