Date
June 2, 2025, 2:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.726742] ================================================================== [ 19.727415] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x390/0x468 [ 19.727961] Read of size 1 at addr fff00000c3f5a000 by task kunit_try_catch/203 [ 19.728816] [ 19.728999] CPU: 1 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.14.10-rc1 #1 [ 19.729104] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.729135] Hardware name: linux,dummy-virt (DT) [ 19.729190] Call trace: [ 19.729218] show_stack+0x20/0x38 (C) [ 19.729287] dump_stack_lvl+0x8c/0xd0 [ 19.729344] print_report+0x118/0x608 [ 19.729583] kasan_report+0xdc/0x128 [ 19.729648] __asan_report_load1_noabort+0x20/0x30 [ 19.729704] kmem_cache_rcu_uaf+0x390/0x468 [ 19.729757] kunit_try_run_case+0x170/0x3f0 [ 19.729812] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.729867] kthread+0x318/0x620 [ 19.729916] ret_from_fork+0x10/0x20 [ 19.729971] [ 19.732680] Allocated by task 203: [ 19.732878] kasan_save_stack+0x3c/0x68 [ 19.733095] kasan_save_track+0x20/0x40 [ 19.733378] kasan_save_alloc_info+0x40/0x58 [ 19.733560] __kasan_slab_alloc+0xa8/0xb0 [ 19.733726] kmem_cache_alloc_noprof+0x10c/0x398 [ 19.733896] kmem_cache_rcu_uaf+0x12c/0x468 [ 19.735007] kunit_try_run_case+0x170/0x3f0 [ 19.735638] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.735892] kthread+0x318/0x620 [ 19.736068] ret_from_fork+0x10/0x20 [ 19.736255] [ 19.736385] Freed by task 0: [ 19.736538] kasan_save_stack+0x3c/0x68 [ 19.736721] kasan_save_track+0x20/0x40 [ 19.736911] kasan_save_free_info+0x4c/0x78 [ 19.737093] __kasan_slab_free+0x6c/0x98 [ 19.738478] slab_free_after_rcu_debug+0xd4/0x2f8 [ 19.738737] rcu_core+0x9f4/0x1e20 [ 19.739034] rcu_core_si+0x18/0x30 [ 19.739637] handle_softirqs+0x374/0xb28 [ 19.739818] __do_softirq+0x1c/0x28 [ 19.739962] [ 19.740071] Last potentially related work creation: [ 19.740247] kasan_save_stack+0x3c/0x68 [ 19.740447] kasan_record_aux_stack+0xb4/0xc8 [ 19.740656] kmem_cache_free+0x120/0x468 [ 19.740871] kmem_cache_rcu_uaf+0x16c/0x468 [ 19.741077] kunit_try_run_case+0x170/0x3f0 [ 19.742629] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.742948] kthread+0x318/0x620 [ 19.743107] ret_from_fork+0x10/0x20 [ 19.743278] [ 19.743393] The buggy address belongs to the object at fff00000c3f5a000 [ 19.743393] which belongs to the cache test_cache of size 200 [ 19.743856] The buggy address is located 0 bytes inside of [ 19.743856] freed 200-byte region [fff00000c3f5a000, fff00000c3f5a0c8) [ 19.744674] [ 19.744834] The buggy address belongs to the physical page: [ 19.745287] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f5a [ 19.745813] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.746092] page_type: f5(slab) [ 19.746344] raw: 0bfffe0000000000 fff00000c3f5c000 dead000000000122 0000000000000000 [ 19.746705] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 19.747043] page dumped because: kasan: bad access detected [ 19.748073] [ 19.748527] Memory state around the buggy address: [ 19.748839] fff00000c3f59f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 19.749702] fff00000c3f59f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 19.750482] >fff00000c3f5a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.751190] ^ [ 19.751470] fff00000c3f5a080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 19.752645] fff00000c3f5a100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.753199] ==================================================================
[ 13.484746] ================================================================== [ 13.485818] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e5/0x510 [ 13.486289] Read of size 1 at addr ffff888101beb000 by task kunit_try_catch/221 [ 13.487033] [ 13.487136] CPU: 1 UID: 0 PID: 221 Comm: kunit_try_catch Tainted: G B N 6.14.10-rc1 #1 [ 13.487179] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.487191] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.487211] Call Trace: [ 13.487236] <TASK> [ 13.487255] dump_stack_lvl+0x73/0xb0 [ 13.487285] print_report+0xd1/0x650 [ 13.487319] ? __virt_addr_valid+0x1db/0x2d0 [ 13.487344] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 13.487365] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.487390] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 13.487412] kasan_report+0x140/0x180 [ 13.487433] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 13.487459] __asan_report_load1_noabort+0x18/0x20 [ 13.487481] kmem_cache_rcu_uaf+0x3e5/0x510 [ 13.487502] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 13.487523] ? finish_task_switch.isra.0+0x153/0x700 [ 13.487547] ? __switch_to+0x5d9/0xf60 [ 13.487576] ? __pfx_read_tsc+0x10/0x10 [ 13.487597] ? ktime_get_ts64+0x86/0x230 [ 13.487622] kunit_try_run_case+0x1a6/0x480 [ 13.487647] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.487667] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 13.487692] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.487714] ? __kthread_parkme+0x82/0x160 [ 13.487737] ? preempt_count_sub+0x50/0x80 [ 13.487760] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.487782] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.487807] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.487832] kthread+0x324/0x6e0 [ 13.487853] ? trace_preempt_on+0x20/0xc0 [ 13.487877] ? __pfx_kthread+0x10/0x10 [ 13.487898] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.487919] ? calculate_sigpending+0x7b/0xa0 [ 13.487941] ? __pfx_kthread+0x10/0x10 [ 13.487962] ret_from_fork+0x41/0x80 [ 13.487980] ? __pfx_kthread+0x10/0x10 [ 13.488002] ret_from_fork_asm+0x1a/0x30 [ 13.488043] </TASK> [ 13.488053] [ 13.496439] Allocated by task 221: [ 13.496630] kasan_save_stack+0x45/0x70 [ 13.496814] kasan_save_track+0x18/0x40 [ 13.497000] kasan_save_alloc_info+0x3b/0x50 [ 13.497157] __kasan_slab_alloc+0x91/0xa0 [ 13.497295] kmem_cache_alloc_noprof+0x124/0x400 [ 13.497500] kmem_cache_rcu_uaf+0x156/0x510 [ 13.497754] kunit_try_run_case+0x1a6/0x480 [ 13.497969] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.498237] kthread+0x324/0x6e0 [ 13.498390] ret_from_fork+0x41/0x80 [ 13.498521] ret_from_fork_asm+0x1a/0x30 [ 13.498758] [ 13.498836] Freed by task 0: [ 13.498987] kasan_save_stack+0x45/0x70 [ 13.499162] kasan_save_track+0x18/0x40 [ 13.499326] kasan_save_free_info+0x3f/0x60 [ 13.499514] __kasan_slab_free+0x56/0x70 [ 13.499888] slab_free_after_rcu_debug+0xe4/0x310 [ 13.500100] rcu_core+0x680/0x1d70 [ 13.500225] rcu_core_si+0x12/0x20 [ 13.500345] handle_softirqs+0x209/0x730 [ 13.500482] __irq_exit_rcu+0xc9/0x110 [ 13.500612] irq_exit_rcu+0x12/0x20 [ 13.500757] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.501359] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.501692] [ 13.501806] Last potentially related work creation: [ 13.502050] kasan_save_stack+0x45/0x70 [ 13.502249] kasan_record_aux_stack+0xb2/0xc0 [ 13.502461] kmem_cache_free+0x132/0x420 [ 13.502763] kmem_cache_rcu_uaf+0x195/0x510 [ 13.502948] kunit_try_run_case+0x1a6/0x480 [ 13.503124] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.503327] kthread+0x324/0x6e0 [ 13.503499] ret_from_fork+0x41/0x80 [ 13.503847] ret_from_fork_asm+0x1a/0x30 [ 13.503996] [ 13.504078] The buggy address belongs to the object at ffff888101beb000 [ 13.504078] which belongs to the cache test_cache of size 200 [ 13.505050] The buggy address is located 0 bytes inside of [ 13.505050] freed 200-byte region [ffff888101beb000, ffff888101beb0c8) [ 13.505547] [ 13.505919] The buggy address belongs to the physical page: [ 13.506408] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101beb [ 13.507054] flags: 0x200000000000000(node=0|zone=2) [ 13.507288] page_type: f5(slab) [ 13.507450] raw: 0200000000000000 ffff888101b62780 dead000000000122 0000000000000000 [ 13.508402] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 13.508891] page dumped because: kasan: bad access detected [ 13.509132] [ 13.509225] Memory state around the buggy address: [ 13.509429] ffff888101beaf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.510232] ffff888101beaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.510757] >ffff888101beb000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.511209] ^ [ 13.511366] ffff888101beb080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 13.512221] ffff888101beb100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.512709] ==================================================================