Date
Nov. 22, 2024, 6:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 35.317798] ================================================================== [ 35.319306] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x390/0x468 [ 35.320363] Read of size 1 at addr fff00000c6afc000 by task kunit_try_catch/202 [ 35.321711] [ 35.322859] CPU: 0 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241122 #1 [ 35.324506] Tainted: [B]=BAD_PAGE, [N]=TEST [ 35.325684] Hardware name: linux,dummy-virt (DT) [ 35.326506] Call trace: [ 35.326928] show_stack+0x20/0x38 (C) [ 35.327750] dump_stack_lvl+0x8c/0xd0 [ 35.328585] print_report+0x118/0x5e0 [ 35.329139] kasan_report+0xc8/0x118 [ 35.329704] __asan_report_load1_noabort+0x20/0x30 [ 35.331053] kmem_cache_rcu_uaf+0x390/0x468 [ 35.332184] kunit_try_run_case+0x14c/0x3d0 [ 35.332867] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 35.334045] kthread+0x24c/0x2d0 [ 35.334605] ret_from_fork+0x10/0x20 [ 35.335314] [ 35.335802] Allocated by task 202: [ 35.336360] kasan_save_stack+0x3c/0x68 [ 35.337370] kasan_save_track+0x20/0x40 [ 35.338099] kasan_save_alloc_info+0x40/0x58 [ 35.339018] __kasan_slab_alloc+0xa8/0xb0 [ 35.339326] kmem_cache_alloc_noprof+0x108/0x3a0 [ 35.340195] kmem_cache_rcu_uaf+0x12c/0x468 [ 35.340806] kunit_try_run_case+0x14c/0x3d0 [ 35.341879] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 35.343260] kthread+0x24c/0x2d0 [ 35.343701] ret_from_fork+0x10/0x20 [ 35.344182] [ 35.344879] Freed by task 0: [ 35.345353] kasan_save_stack+0x3c/0x68 [ 35.346190] kasan_save_track+0x20/0x40 [ 35.346940] kasan_save_free_info+0x4c/0x78 [ 35.347614] __kasan_slab_free+0x6c/0x98 [ 35.348803] slab_free_after_rcu_debug+0xd4/0x2f8 [ 35.349350] rcu_core+0xa54/0x1df8 [ 35.350203] rcu_core_si+0x18/0x30 [ 35.351958] handle_softirqs+0x374/0xb20 [ 35.353030] __do_softirq+0x1c/0x28 [ 35.353632] [ 35.353917] Last potentially related work creation: [ 35.354896] kasan_save_stack+0x3c/0x68 [ 35.355671] __kasan_record_aux_stack+0xbc/0xe8 [ 35.356420] kasan_record_aux_stack_noalloc+0x14/0x20 [ 35.357636] kmem_cache_free+0x28c/0x470 [ 35.359026] kmem_cache_rcu_uaf+0x16c/0x468 [ 35.359701] kunit_try_run_case+0x14c/0x3d0 [ 35.360329] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 35.361063] kthread+0x24c/0x2d0 [ 35.361589] ret_from_fork+0x10/0x20 [ 35.362755] [ 35.363178] The buggy address belongs to the object at fff00000c6afc000 [ 35.363178] which belongs to the cache test_cache of size 200 [ 35.365626] The buggy address is located 0 bytes inside of [ 35.365626] freed 200-byte region [fff00000c6afc000, fff00000c6afc0c8) [ 35.368164] [ 35.368974] The buggy address belongs to the physical page: [ 35.369915] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106afc [ 35.371017] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 35.371792] page_type: f5(slab) [ 35.372407] raw: 0bfffe0000000000 fff00000c408c640 dead000000000122 0000000000000000 [ 35.373947] raw: 0000000000000000 00000000800f000f 00000001f5000000 0000000000000000 [ 35.374922] page dumped because: kasan: bad access detected [ 35.375603] [ 35.376076] Memory state around the buggy address: [ 35.377271] fff00000c6afbf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.378263] fff00000c6afbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.379072] >fff00000c6afc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.380061] ^ [ 35.380525] fff00000c6afc080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.381983] fff00000c6afc100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.382893] ==================================================================
[ 26.424225] ================================================================== [ 26.425388] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e5/0x510 [ 26.426747] Read of size 1 at addr ffff888101ab7000 by task kunit_try_catch/221 [ 26.427434] [ 26.427628] CPU: 0 UID: 0 PID: 221 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241122 #1 [ 26.428471] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.428923] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.429966] Call Trace: [ 26.430173] <TASK> [ 26.430381] dump_stack_lvl+0x73/0xb0 [ 26.430676] print_report+0xd1/0x640 [ 26.431106] ? __virt_addr_valid+0x1db/0x2d0 [ 26.431537] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.432205] kasan_report+0x102/0x140 [ 26.432696] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 26.433288] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 26.433869] __asan_report_load1_noabort+0x18/0x20 [ 26.434489] kmem_cache_rcu_uaf+0x3e5/0x510 [ 26.435015] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 26.436029] ? finish_task_switch.isra.0+0x153/0x700 [ 26.436550] ? __switch_to+0x5d9/0xf60 [ 26.437138] ? __pfx_read_tsc+0x10/0x10 [ 26.437851] ? ktime_get_ts64+0x84/0x230 [ 26.438484] kunit_try_run_case+0x1b3/0x490 [ 26.438925] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.439288] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 26.439900] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 26.440329] ? __kthread_parkme+0x82/0x160 [ 26.440773] ? preempt_count_sub+0x50/0x80 [ 26.441125] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.441640] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 26.442308] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.442801] kthread+0x257/0x310 [ 26.443211] ? __pfx_kthread+0x10/0x10 [ 26.443726] ret_from_fork+0x41/0x80 [ 26.444057] ? __pfx_kthread+0x10/0x10 [ 26.444330] ret_from_fork_asm+0x1a/0x30 [ 26.444784] </TASK> [ 26.445100] [ 26.445376] Allocated by task 221: [ 26.445758] kasan_save_stack+0x3d/0x60 [ 26.446183] kasan_save_track+0x18/0x40 [ 26.446662] kasan_save_alloc_info+0x3b/0x50 [ 26.446986] __kasan_slab_alloc+0x91/0xa0 [ 26.447259] kmem_cache_alloc_noprof+0x11e/0x3f0 [ 26.448701] kmem_cache_rcu_uaf+0x156/0x510 [ 26.449298] kunit_try_run_case+0x1b3/0x490 [ 26.449735] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.450215] kthread+0x257/0x310 [ 26.450549] ret_from_fork+0x41/0x80 [ 26.451020] ret_from_fork_asm+0x1a/0x30 [ 26.451451] [ 26.451647] Freed by task 0: [ 26.451927] kasan_save_stack+0x3d/0x60 [ 26.452312] kasan_save_track+0x18/0x40 [ 26.452763] kasan_save_free_info+0x3f/0x60 [ 26.453161] __kasan_slab_free+0x56/0x70 [ 26.453632] slab_free_after_rcu_debug+0xe4/0x310 [ 26.453957] rcu_core+0x680/0x1d70 [ 26.454211] rcu_core_si+0x12/0x20 [ 26.454678] handle_softirqs+0x209/0x720 [ 26.455216] __irq_exit_rcu+0xc9/0x110 [ 26.455733] irq_exit_rcu+0x12/0x20 [ 26.456168] sysvec_apic_timer_interrupt+0x81/0x90 [ 26.456520] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 26.457060] [ 26.457318] Last potentially related work creation: [ 26.457754] kasan_save_stack+0x3d/0x60 [ 26.458199] __kasan_record_aux_stack+0xae/0xc0 [ 26.458600] kasan_record_aux_stack_noalloc+0xf/0x20 [ 26.458970] kmem_cache_free+0x276/0x420 [ 26.459235] kmem_cache_rcu_uaf+0x195/0x510 [ 26.459764] kunit_try_run_case+0x1b3/0x490 [ 26.460229] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.460795] kthread+0x257/0x310 [ 26.461181] ret_from_fork+0x41/0x80 [ 26.461655] ret_from_fork_asm+0x1a/0x30 [ 26.462132] [ 26.462374] The buggy address belongs to the object at ffff888101ab7000 [ 26.462374] which belongs to the cache test_cache of size 200 [ 26.463129] The buggy address is located 0 bytes inside of [ 26.463129] freed 200-byte region [ffff888101ab7000, ffff888101ab70c8) [ 26.464129] [ 26.464356] The buggy address belongs to the physical page: [ 26.464685] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101ab7 [ 26.465508] flags: 0x200000000000000(node=0|zone=2) [ 26.465856] page_type: f5(slab) [ 26.466280] raw: 0200000000000000 ffff888101a673c0 dead000000000122 0000000000000000 [ 26.466790] raw: 0000000000000000 00000000800f000f 00000001f5000000 0000000000000000 [ 26.467461] page dumped because: kasan: bad access detected [ 26.467976] [ 26.468156] Memory state around the buggy address: [ 26.468479] ffff888101ab6f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.468983] ffff888101ab6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.469669] >ffff888101ab7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.470367] ^ [ 26.470717] ffff888101ab7080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 26.471197] ffff888101ab7100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.471952] ==================================================================