Date
July 15, 2025, 11:09 a.m.
Environment | |
---|---|
qemu-arm64 | |
qemu-x86_64 |
[ 16.773535] ================================================================== [ 16.773651] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 16.773730] Read of size 1 at addr fff00000c5953000 by task kunit_try_catch/214 [ 16.773782] [ 16.773824] CPU: 1 UID: 0 PID: 214 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.773913] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.773941] Hardware name: linux,dummy-virt (DT) [ 16.773976] Call trace: [ 16.773999] show_stack+0x20/0x38 (C) [ 16.774052] dump_stack_lvl+0x8c/0xd0 [ 16.774104] print_report+0x118/0x5d0 [ 16.774151] kasan_report+0xdc/0x128 [ 16.774211] __asan_report_load1_noabort+0x20/0x30 [ 16.774262] kmem_cache_rcu_uaf+0x388/0x468 [ 16.774309] kunit_try_run_case+0x170/0x3f0 [ 16.774358] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.774411] kthread+0x328/0x630 [ 16.774453] ret_from_fork+0x10/0x20 [ 16.774505] [ 16.774522] Allocated by task 214: [ 16.774550] kasan_save_stack+0x3c/0x68 [ 16.774592] kasan_save_track+0x20/0x40 [ 16.774628] kasan_save_alloc_info+0x40/0x58 [ 16.774668] __kasan_slab_alloc+0xa8/0xb0 [ 16.774707] kmem_cache_alloc_noprof+0x10c/0x398 [ 16.774749] kmem_cache_rcu_uaf+0x12c/0x468 [ 16.774788] kunit_try_run_case+0x170/0x3f0 [ 16.774825] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.774869] kthread+0x328/0x630 [ 16.774901] ret_from_fork+0x10/0x20 [ 16.774937] [ 16.774955] Freed by task 0: [ 16.774982] kasan_save_stack+0x3c/0x68 [ 16.775019] kasan_save_track+0x20/0x40 [ 16.775057] kasan_save_free_info+0x4c/0x78 [ 16.775097] __kasan_slab_free+0x6c/0x98 [ 16.775132] slab_free_after_rcu_debug+0xd4/0x2f8 [ 16.775172] rcu_core+0x9f4/0x1e20 [ 16.775242] rcu_core_si+0x18/0x30 [ 16.775277] handle_softirqs+0x374/0xb28 [ 16.775313] __do_softirq+0x1c/0x28 [ 16.775347] [ 16.775365] Last potentially related work creation: [ 16.775393] kasan_save_stack+0x3c/0x68 [ 16.775431] kasan_record_aux_stack+0xb4/0xc8 [ 16.775470] kmem_cache_free+0x120/0x468 [ 16.775507] kmem_cache_rcu_uaf+0x16c/0x468 [ 16.775543] kunit_try_run_case+0x170/0x3f0 [ 16.775582] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.775625] kthread+0x328/0x630 [ 16.775656] ret_from_fork+0x10/0x20 [ 16.775691] [ 16.775709] The buggy address belongs to the object at fff00000c5953000 [ 16.775709] which belongs to the cache test_cache of size 200 [ 16.775769] The buggy address is located 0 bytes inside of [ 16.775769] freed 200-byte region [fff00000c5953000, fff00000c59530c8) [ 16.775834] [ 16.775855] The buggy address belongs to the physical page: [ 16.775889] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105953 [ 16.775948] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.776001] page_type: f5(slab) [ 16.776042] raw: 0bfffe0000000000 fff00000c590f780 dead000000000122 0000000000000000 [ 16.776093] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 16.776135] page dumped because: kasan: bad access detected [ 16.776166] [ 16.776194] Memory state around the buggy address: [ 16.776228] fff00000c5952f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.776272] fff00000c5952f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.776318] >fff00000c5953000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.776357] ^ [ 16.776385] fff00000c5953080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 16.776427] fff00000c5953100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.776470] ==================================================================
[ 13.344522] ================================================================== [ 13.345018] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.345861] Read of size 1 at addr ffff8881032d8000 by task kunit_try_catch/230 [ 13.346328] [ 13.346953] CPU: 0 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 13.347027] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.347040] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.347061] Call Trace: [ 13.347074] <TASK> [ 13.347093] dump_stack_lvl+0x73/0xb0 [ 13.347128] print_report+0xd1/0x610 [ 13.347151] ? __virt_addr_valid+0x1db/0x2d0 [ 13.347177] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.347200] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.347224] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.347247] kasan_report+0x141/0x180 [ 13.347269] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.347297] __asan_report_load1_noabort+0x18/0x20 [ 13.347322] kmem_cache_rcu_uaf+0x3e3/0x510 [ 13.347426] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 13.347450] ? finish_task_switch.isra.0+0x153/0x700 [ 13.347475] ? __switch_to+0x47/0xf50 [ 13.347504] ? __pfx_read_tsc+0x10/0x10 [ 13.347526] ? ktime_get_ts64+0x86/0x230 [ 13.347551] kunit_try_run_case+0x1a5/0x480 [ 13.347577] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.347600] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.347625] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.347649] ? __kthread_parkme+0x82/0x180 [ 13.347670] ? preempt_count_sub+0x50/0x80 [ 13.347693] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.347718] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.347742] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.347781] kthread+0x337/0x6f0 [ 13.347800] ? trace_preempt_on+0x20/0xc0 [ 13.347824] ? __pfx_kthread+0x10/0x10 [ 13.347845] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.347866] ? calculate_sigpending+0x7b/0xa0 [ 13.347891] ? __pfx_kthread+0x10/0x10 [ 13.347913] ret_from_fork+0x116/0x1d0 [ 13.347931] ? __pfx_kthread+0x10/0x10 [ 13.347951] ret_from_fork_asm+0x1a/0x30 [ 13.347983] </TASK> [ 13.347993] [ 13.359728] Allocated by task 230: [ 13.359880] kasan_save_stack+0x45/0x70 [ 13.360028] kasan_save_track+0x18/0x40 [ 13.360175] kasan_save_alloc_info+0x3b/0x50 [ 13.360474] __kasan_slab_alloc+0x91/0xa0 [ 13.360792] kmem_cache_alloc_noprof+0x123/0x3f0 [ 13.361007] kmem_cache_rcu_uaf+0x155/0x510 [ 13.361715] kunit_try_run_case+0x1a5/0x480 [ 13.361931] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.362130] kthread+0x337/0x6f0 [ 13.362292] ret_from_fork+0x116/0x1d0 [ 13.362558] ret_from_fork_asm+0x1a/0x30 [ 13.362765] [ 13.362861] Freed by task 0: [ 13.362989] kasan_save_stack+0x45/0x70 [ 13.363173] kasan_save_track+0x18/0x40 [ 13.363354] kasan_save_free_info+0x3f/0x60 [ 13.364051] __kasan_slab_free+0x56/0x70 [ 13.364258] slab_free_after_rcu_debug+0xe4/0x310 [ 13.364631] rcu_core+0x66f/0x1c40 [ 13.365005] rcu_core_si+0x12/0x20 [ 13.365190] handle_softirqs+0x209/0x730 [ 13.365599] __irq_exit_rcu+0xc9/0x110 [ 13.365794] irq_exit_rcu+0x12/0x20 [ 13.365981] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.366306] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.366769] [ 13.366876] Last potentially related work creation: [ 13.367218] kasan_save_stack+0x45/0x70 [ 13.367488] kasan_record_aux_stack+0xb2/0xc0 [ 13.368004] kmem_cache_free+0x131/0x420 [ 13.368208] kmem_cache_rcu_uaf+0x194/0x510 [ 13.368359] kunit_try_run_case+0x1a5/0x480 [ 13.368652] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.368918] kthread+0x337/0x6f0 [ 13.369076] ret_from_fork+0x116/0x1d0 [ 13.369252] ret_from_fork_asm+0x1a/0x30 [ 13.369829] [ 13.369927] The buggy address belongs to the object at ffff8881032d8000 [ 13.369927] which belongs to the cache test_cache of size 200 [ 13.370907] The buggy address is located 0 bytes inside of [ 13.370907] freed 200-byte region [ffff8881032d8000, ffff8881032d80c8) [ 13.371533] [ 13.371633] The buggy address belongs to the physical page: [ 13.371879] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1032d8 [ 13.372244] flags: 0x200000000000000(node=0|zone=2) [ 13.372877] page_type: f5(slab) [ 13.373033] raw: 0200000000000000 ffff8881032d5000 dead000000000122 0000000000000000 [ 13.373560] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 13.373888] page dumped because: kasan: bad access detected [ 13.374115] [ 13.374198] Memory state around the buggy address: [ 13.374392] ffff8881032d7f00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 13.375026] ffff8881032d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.375333] >ffff8881032d8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.375922] ^ [ 13.376084] ffff8881032d8080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 13.376378] ffff8881032d8100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.376737] ==================================================================