Date
July 15, 2025, 2:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.141912] ================================================================== [ 19.141997] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 19.142074] Read of size 1 at addr fff00000c6643000 by task kunit_try_catch/215 [ 19.142126] [ 19.142169] CPU: 0 UID: 0 PID: 215 Comm: kunit_try_catch Tainted: G B N 6.15.7-rc1 #1 PREEMPT [ 19.142277] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.142305] Hardware name: linux,dummy-virt (DT) [ 19.142339] Call trace: [ 19.142363] show_stack+0x20/0x38 (C) [ 19.142414] dump_stack_lvl+0x8c/0xd0 [ 19.142465] print_report+0x118/0x5d0 [ 19.142511] kasan_report+0xdc/0x128 [ 19.142555] __asan_report_load1_noabort+0x20/0x30 [ 19.142606] kmem_cache_rcu_uaf+0x388/0x468 [ 19.142657] kunit_try_run_case+0x170/0x3f0 [ 19.142709] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.142764] kthread+0x328/0x630 [ 19.142811] ret_from_fork+0x10/0x20 [ 19.142860] [ 19.142879] Allocated by task 215: [ 19.142909] kasan_save_stack+0x3c/0x68 [ 19.142949] kasan_save_track+0x20/0x40 [ 19.142985] kasan_save_alloc_info+0x40/0x58 [ 19.143024] __kasan_slab_alloc+0xa8/0xb0 [ 19.143059] kmem_cache_alloc_noprof+0x10c/0x398 [ 19.143101] kmem_cache_rcu_uaf+0x12c/0x468 [ 19.143141] kunit_try_run_case+0x170/0x3f0 [ 19.143179] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.143236] kthread+0x328/0x630 [ 19.143270] ret_from_fork+0x10/0x20 [ 19.143306] [ 19.143324] Freed by task 0: [ 19.143349] kasan_save_stack+0x3c/0x68 [ 19.143385] kasan_save_track+0x20/0x40 [ 19.143419] kasan_save_free_info+0x4c/0x78 [ 19.143458] __kasan_slab_free+0x6c/0x98 [ 19.143494] slab_free_after_rcu_debug+0xd4/0x2f8 [ 19.143531] rcu_core+0x9f4/0x1e20 [ 19.143568] rcu_core_si+0x18/0x30 [ 19.143600] handle_softirqs+0x374/0xb28 [ 19.143638] __do_softirq+0x1c/0x28 [ 19.143671] [ 19.143689] Last potentially related work creation: [ 19.143717] kasan_save_stack+0x3c/0x68 [ 19.143752] kasan_record_aux_stack+0xb4/0xc8 [ 19.143791] kmem_cache_free+0x120/0x468 [ 19.143826] kmem_cache_rcu_uaf+0x16c/0x468 [ 19.143866] kunit_try_run_case+0x170/0x3f0 [ 19.143903] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.143948] kthread+0x328/0x630 [ 19.143984] ret_from_fork+0x10/0x20 [ 19.144020] [ 19.144037] The buggy address belongs to the object at fff00000c6643000 [ 19.144037] which belongs to the cache test_cache of size 200 [ 19.144098] The buggy address is located 0 bytes inside of [ 19.144098] freed 200-byte region [fff00000c6643000, fff00000c66430c8) [ 19.144162] [ 19.144183] The buggy address belongs to the physical page: [ 19.144231] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106643 [ 19.144287] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.144340] page_type: f5(slab) [ 19.144382] raw: 0bfffe0000000000 fff00000c3e4fdc0 dead000000000122 0000000000000000 [ 19.144433] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 19.144476] page dumped because: kasan: bad access detected [ 19.144508] [ 19.144525] Memory state around the buggy address: [ 19.144559] fff00000c6642f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 19.144604] fff00000c6642f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 19.144646] >fff00000c6643000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.144687] ^ [ 19.144713] fff00000c6643080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 19.144758] fff00000c6643100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.144800] ==================================================================
[ 11.787872] ================================================================== [ 11.788327] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.788571] Read of size 1 at addr ffff888102f40000 by task kunit_try_catch/232 [ 11.788809] [ 11.788918] CPU: 1 UID: 0 PID: 232 Comm: kunit_try_catch Tainted: G B N 6.15.7-rc1 #1 PREEMPT(voluntary) [ 11.788963] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.788974] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.788995] Call Trace: [ 11.789007] <TASK> [ 11.789024] dump_stack_lvl+0x73/0xb0 [ 11.789049] print_report+0xd1/0x610 [ 11.789071] ? __virt_addr_valid+0x1db/0x2d0 [ 11.789093] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.789133] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.789156] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.789318] kasan_report+0x141/0x180 [ 11.789343] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.789367] __asan_report_load1_noabort+0x18/0x20 [ 11.789393] kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.789412] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 11.789430] ? finish_task_switch.isra.0+0x153/0x700 [ 11.789454] ? __switch_to+0x5d9/0xf60 [ 11.789474] ? dequeue_task_fair+0x166/0x4e0 [ 11.789499] ? __pfx_read_tsc+0x10/0x10 [ 11.789518] ? ktime_get_ts64+0x86/0x230 [ 11.789543] kunit_try_run_case+0x1a5/0x480 [ 11.789563] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.789581] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.789605] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.789628] ? __kthread_parkme+0x82/0x180 [ 11.789649] ? preempt_count_sub+0x50/0x80 [ 11.789672] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.789772] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.789816] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.789838] kthread+0x337/0x6f0 [ 11.789854] ? trace_preempt_on+0x20/0xc0 [ 11.789888] ? __pfx_kthread+0x10/0x10 [ 11.789905] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.789926] ? calculate_sigpending+0x7b/0xa0 [ 11.789947] ? __pfx_kthread+0x10/0x10 [ 11.789964] ret_from_fork+0x41/0x80 [ 11.789984] ? __pfx_kthread+0x10/0x10 [ 11.790000] ret_from_fork_asm+0x1a/0x30 [ 11.790051] </TASK> [ 11.790072] [ 11.798681] Allocated by task 232: [ 11.798847] kasan_save_stack+0x45/0x70 [ 11.799255] kasan_save_track+0x18/0x40 [ 11.799474] kasan_save_alloc_info+0x3b/0x50 [ 11.799785] __kasan_slab_alloc+0x91/0xa0 [ 11.800050] kmem_cache_alloc_noprof+0x123/0x3f0 [ 11.800283] kmem_cache_rcu_uaf+0x155/0x510 [ 11.800457] kunit_try_run_case+0x1a5/0x480 [ 11.800595] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.801044] kthread+0x337/0x6f0 [ 11.801259] ret_from_fork+0x41/0x80 [ 11.801408] ret_from_fork_asm+0x1a/0x30 [ 11.801636] [ 11.801730] Freed by task 0: [ 11.801958] kasan_save_stack+0x45/0x70 [ 11.802196] kasan_save_track+0x18/0x40 [ 11.802398] kasan_save_free_info+0x3f/0x60 [ 11.802637] __kasan_slab_free+0x56/0x70 [ 11.802854] slab_free_after_rcu_debug+0xe4/0x310 [ 11.803108] rcu_core+0x66c/0x1c30 [ 11.803374] rcu_core_si+0x12/0x20 [ 11.803697] handle_softirqs+0x209/0x730 [ 11.803900] __irq_exit_rcu+0xc9/0x110 [ 11.804124] irq_exit_rcu+0x12/0x20 [ 11.804334] sysvec_apic_timer_interrupt+0x81/0x90 [ 11.804487] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 11.804666] [ 11.804759] Last potentially related work creation: [ 11.805211] kasan_save_stack+0x45/0x70 [ 11.805405] kasan_record_aux_stack+0xb2/0xc0 [ 11.805620] kmem_cache_free+0x131/0x420 [ 11.806343] kmem_cache_rcu_uaf+0x194/0x510 [ 11.806493] kunit_try_run_case+0x1a5/0x480 [ 11.806631] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.806800] kthread+0x337/0x6f0 [ 11.807198] ret_from_fork+0x41/0x80 [ 11.807408] ret_from_fork_asm+0x1a/0x30 [ 11.807605] [ 11.807693] The buggy address belongs to the object at ffff888102f40000 [ 11.807693] which belongs to the cache test_cache of size 200 [ 11.808378] The buggy address is located 0 bytes inside of [ 11.808378] freed 200-byte region [ffff888102f40000, ffff888102f400c8) [ 11.809006] [ 11.809123] The buggy address belongs to the physical page: [ 11.809395] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102f40 [ 11.809631] flags: 0x200000000000000(node=0|zone=2) [ 11.809792] page_type: f5(slab) [ 11.809924] raw: 0200000000000000 ffff8881011f7280 dead000000000122 0000000000000000 [ 11.810247] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 11.810941] page dumped because: kasan: bad access detected [ 11.811346] [ 11.811536] Memory state around the buggy address: [ 11.811871] ffff888102f3ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.812736] ffff888102f3ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.813120] >ffff888102f40000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.813541] ^ [ 11.813782] ffff888102f40080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 11.814191] ffff888102f40100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.814574] ==================================================================