Date
June 17, 2025, 3:40 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 23.450010] ================================================================== [ 23.450172] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 23.450279] Read of size 1 at addr fff00000c7926000 by task kunit_try_catch/215 [ 23.450341] [ 23.450400] CPU: 0 UID: 0 PID: 215 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT [ 23.450503] Tainted: [B]=BAD_PAGE, [N]=TEST [ 23.450535] Hardware name: linux,dummy-virt (DT) [ 23.450576] Call trace: [ 23.450605] show_stack+0x20/0x38 (C) [ 23.450683] dump_stack_lvl+0x8c/0xd0 [ 23.450760] print_report+0x118/0x608 [ 23.450831] kasan_report+0xdc/0x128 [ 23.450897] __asan_report_load1_noabort+0x20/0x30 [ 23.450956] kmem_cache_rcu_uaf+0x388/0x468 [ 23.451012] kunit_try_run_case+0x170/0x3f0 [ 23.451072] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 23.451135] kthread+0x328/0x630 [ 23.451188] ret_from_fork+0x10/0x20 [ 23.451246] [ 23.451268] Allocated by task 215: [ 23.451303] kasan_save_stack+0x3c/0x68 [ 23.451351] kasan_save_track+0x20/0x40 [ 23.451393] kasan_save_alloc_info+0x40/0x58 [ 23.451437] __kasan_slab_alloc+0xa8/0xb0 [ 23.451477] kmem_cache_alloc_noprof+0x10c/0x398 [ 23.451521] kmem_cache_rcu_uaf+0x12c/0x468 [ 23.451566] kunit_try_run_case+0x170/0x3f0 [ 23.451611] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 23.451659] kthread+0x328/0x630 [ 23.451697] ret_from_fork+0x10/0x20 [ 23.451750] [ 23.451772] Freed by task 0: [ 23.451804] kasan_save_stack+0x3c/0x68 [ 23.451845] kasan_save_track+0x20/0x40 [ 23.451895] kasan_save_free_info+0x4c/0x78 [ 23.451941] __kasan_slab_free+0x6c/0x98 [ 23.451982] slab_free_after_rcu_debug+0xd4/0x2f8 [ 23.452024] rcu_core+0x9f4/0x1e20 [ 23.452065] rcu_core_si+0x18/0x30 [ 23.452101] handle_softirqs+0x374/0xb28 [ 23.452180] __do_softirq+0x1c/0x28 [ 23.452220] [ 23.452241] Last potentially related work creation: [ 23.452270] kasan_save_stack+0x3c/0x68 [ 23.452313] kasan_record_aux_stack+0xb4/0xc8 [ 23.452355] kmem_cache_free+0x120/0x468 [ 23.452396] kmem_cache_rcu_uaf+0x16c/0x468 [ 23.452441] kunit_try_run_case+0x170/0x3f0 [ 23.452483] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 23.452532] kthread+0x328/0x630 [ 23.452571] ret_from_fork+0x10/0x20 [ 23.452609] [ 23.452630] The buggy address belongs to the object at fff00000c7926000 [ 23.452630] which belongs to the cache test_cache of size 200 [ 23.452697] The buggy address is located 0 bytes inside of [ 23.452697] freed 200-byte region [fff00000c7926000, fff00000c79260c8) [ 23.452775] [ 23.452802] The buggy address belongs to the physical page: [ 23.452840] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107926 [ 23.452906] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 23.452967] page_type: f5(slab) [ 23.453018] raw: 0bfffe0000000000 fff00000c5918500 dead000000000122 0000000000000000 [ 23.453076] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 23.453124] page dumped because: kasan: bad access detected [ 23.453158] [ 23.453177] Memory state around the buggy address: [ 23.453217] fff00000c7925f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.453270] fff00000c7925f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.453366] >fff00000c7926000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.453412] ^ [ 23.453446] fff00000c7926080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.453493] fff00000c7926100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.453536] ==================================================================
[ 20.664356] ================================================================== [ 20.665855] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 20.666954] Read of size 1 at addr ffff888102ee2000 by task kunit_try_catch/233 [ 20.667903] [ 20.668119] CPU: 1 UID: 0 PID: 233 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT(voluntary) [ 20.668228] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.668256] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 20.668360] Call Trace: [ 20.668397] <TASK> [ 20.668441] dump_stack_lvl+0x73/0xb0 [ 20.668506] print_report+0xd1/0x650 [ 20.668570] ? __virt_addr_valid+0x1db/0x2d0 [ 20.668643] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 20.668703] ? kasan_complete_mode_report_info+0x64/0x200 [ 20.668772] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 20.668839] kasan_report+0x141/0x180 [ 20.668910] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 20.668989] __asan_report_load1_noabort+0x18/0x20 [ 20.669108] kmem_cache_rcu_uaf+0x3e3/0x510 [ 20.669180] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 20.669235] ? finish_task_switch.isra.0+0x153/0x700 [ 20.669329] ? __switch_to+0x5d9/0xf60 [ 20.669394] ? dequeue_task_fair+0x166/0x4e0 [ 20.669473] ? __pfx_read_tsc+0x10/0x10 [ 20.669535] ? ktime_get_ts64+0x86/0x230 [ 20.669616] kunit_try_run_case+0x1a5/0x480 [ 20.669703] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.669777] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 20.669854] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 20.669928] ? __kthread_parkme+0x82/0x180 [ 20.670002] ? preempt_count_sub+0x50/0x80 [ 20.670126] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.670205] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.670277] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 20.670360] kthread+0x337/0x6f0 [ 20.670419] ? trace_preempt_on+0x20/0xc0 [ 20.670493] ? __pfx_kthread+0x10/0x10 [ 20.670550] ? _raw_spin_unlock_irq+0x47/0x80 [ 20.670606] ? calculate_sigpending+0x7b/0xa0 [ 20.670667] ? __pfx_kthread+0x10/0x10 [ 20.670714] ret_from_fork+0x41/0x80 [ 20.670766] ? __pfx_kthread+0x10/0x10 [ 20.670814] ret_from_fork_asm+0x1a/0x30 [ 20.670893] </TASK> [ 20.670924] [ 20.686922] Allocated by task 233: [ 20.687404] kasan_save_stack+0x45/0x70 [ 20.687863] kasan_save_track+0x18/0x40 [ 20.688344] kasan_save_alloc_info+0x3b/0x50 [ 20.688757] __kasan_slab_alloc+0x91/0xa0 [ 20.689264] kmem_cache_alloc_noprof+0x123/0x3f0 [ 20.689643] kmem_cache_rcu_uaf+0x155/0x510 [ 20.690141] kunit_try_run_case+0x1a5/0x480 [ 20.690537] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.690919] kthread+0x337/0x6f0 [ 20.691245] ret_from_fork+0x41/0x80 [ 20.691575] ret_from_fork_asm+0x1a/0x30 [ 20.692020] [ 20.692285] Freed by task 0: [ 20.692642] kasan_save_stack+0x45/0x70 [ 20.693100] kasan_save_track+0x18/0x40 [ 20.693564] kasan_save_free_info+0x3f/0x60 [ 20.694021] __kasan_slab_free+0x56/0x70 [ 20.694495] slab_free_after_rcu_debug+0xe4/0x310 [ 20.694946] rcu_core+0x66c/0x1c30 [ 20.695403] rcu_core_si+0x12/0x20 [ 20.695746] handle_softirqs+0x209/0x730 [ 20.696179] __irq_exit_rcu+0xc9/0x110 [ 20.696583] irq_exit_rcu+0x12/0x20 [ 20.696930] sysvec_apic_timer_interrupt+0x81/0x90 [ 20.697457] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 20.697823] [ 20.698001] Last potentially related work creation: [ 20.698426] kasan_save_stack+0x45/0x70 [ 20.698836] kasan_record_aux_stack+0xb2/0xc0 [ 20.699323] kmem_cache_free+0x131/0x420 [ 20.699743] kmem_cache_rcu_uaf+0x194/0x510 [ 20.700238] kunit_try_run_case+0x1a5/0x480 [ 20.700696] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.701281] kthread+0x337/0x6f0 [ 20.701628] ret_from_fork+0x41/0x80 [ 20.701940] ret_from_fork_asm+0x1a/0x30 [ 20.702321] [ 20.702555] The buggy address belongs to the object at ffff888102ee2000 [ 20.702555] which belongs to the cache test_cache of size 200 [ 20.703640] The buggy address is located 0 bytes inside of [ 20.703640] freed 200-byte region [ffff888102ee2000, ffff888102ee20c8) [ 20.704703] [ 20.704942] The buggy address belongs to the physical page: [ 20.705459] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102ee2 [ 20.705949] flags: 0x200000000000000(node=0|zone=2) [ 20.706453] page_type: f5(slab) [ 20.706830] raw: 0200000000000000 ffff888101b20dc0 dead000000000122 0000000000000000 [ 20.707552] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 20.708244] page dumped because: kasan: bad access detected [ 20.708626] [ 20.708805] Memory state around the buggy address: [ 20.709315] ffff888102ee1f00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 20.709898] ffff888102ee1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.710572] >ffff888102ee2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.711161] ^ [ 20.711503] ffff888102ee2080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 20.712149] ffff888102ee2100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.712706] ==================================================================