Date
Dec. 4, 2024, 3:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 33.499241] ================================================================== [ 33.500912] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x390/0x468 [ 33.501754] Read of size 1 at addr fff00000c66a3000 by task kunit_try_catch/201 [ 33.502932] [ 33.503821] CPU: 1 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241204 #1 [ 33.505447] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.506444] Hardware name: linux,dummy-virt (DT) [ 33.507394] Call trace: [ 33.507821] show_stack+0x20/0x38 (C) [ 33.508397] dump_stack_lvl+0x8c/0xd0 [ 33.509010] print_report+0x118/0x5e0 [ 33.509534] kasan_report+0xc8/0x118 [ 33.510864] __asan_report_load1_noabort+0x20/0x30 [ 33.511914] kmem_cache_rcu_uaf+0x390/0x468 [ 33.512344] kunit_try_run_case+0x14c/0x3d0 [ 33.513102] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.514130] kthread+0x24c/0x2d0 [ 33.515058] ret_from_fork+0x10/0x20 [ 33.515781] [ 33.516117] Allocated by task 201: [ 33.516823] kasan_save_stack+0x3c/0x68 [ 33.517500] kasan_save_track+0x20/0x40 [ 33.518110] kasan_save_alloc_info+0x40/0x58 [ 33.519083] __kasan_slab_alloc+0xa8/0xb0 [ 33.520091] kmem_cache_alloc_noprof+0x108/0x398 [ 33.520589] kmem_cache_rcu_uaf+0x12c/0x468 [ 33.521041] kunit_try_run_case+0x14c/0x3d0 [ 33.522607] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.523658] kthread+0x24c/0x2d0 [ 33.524411] ret_from_fork+0x10/0x20 [ 33.525149] [ 33.525725] Freed by task 0: [ 33.526514] kasan_save_stack+0x3c/0x68 [ 33.528038] kasan_save_track+0x20/0x40 [ 33.528783] kasan_save_free_info+0x4c/0x78 [ 33.529251] __kasan_slab_free+0x6c/0x98 [ 33.529558] slab_free_after_rcu_debug+0xd4/0x2f8 [ 33.530259] rcu_core+0x9f4/0x1e20 [ 33.531070] rcu_core_si+0x18/0x30 [ 33.532602] handle_softirqs+0x374/0xb20 [ 33.533319] __do_softirq+0x1c/0x28 [ 33.534328] [ 33.534599] Last potentially related work creation: [ 33.535095] kasan_save_stack+0x3c/0x68 [ 33.535667] kasan_record_aux_stack+0xb4/0xc8 [ 33.536500] kmem_cache_free+0x28c/0x470 [ 33.537059] kmem_cache_rcu_uaf+0x16c/0x468 [ 33.537676] kunit_try_run_case+0x14c/0x3d0 [ 33.538884] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.539673] kthread+0x24c/0x2d0 [ 33.540258] ret_from_fork+0x10/0x20 [ 33.540813] [ 33.541087] The buggy address belongs to the object at fff00000c66a3000 [ 33.541087] which belongs to the cache test_cache of size 200 [ 33.543011] The buggy address is located 0 bytes inside of [ 33.543011] freed 200-byte region [fff00000c66a3000, fff00000c66a30c8) [ 33.544579] [ 33.544869] The buggy address belongs to the physical page: [ 33.546034] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1066a3 [ 33.546938] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 33.548356] page_type: f5(slab) [ 33.548977] raw: 0bfffe0000000000 fff00000c105cb40 dead000000000122 0000000000000000 [ 33.550333] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 33.551175] page dumped because: kasan: bad access detected [ 33.552028] [ 33.552407] Memory state around the buggy address: [ 33.553049] fff00000c66a2f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 33.554835] fff00000c66a2f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 33.556145] >fff00000c66a3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.557204] ^ [ 33.557806] fff00000c66a3080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.559399] fff00000c66a3100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.560469] ==================================================================
[ 24.281798] ================================================================== [ 24.282788] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e5/0x510 [ 24.284059] Read of size 1 at addr ffff888102997000 by task kunit_try_catch/221 [ 24.284528] [ 24.284738] CPU: 1 UID: 0 PID: 221 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241204 #1 [ 24.285566] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.285970] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.287658] Call Trace: [ 24.287969] <TASK> [ 24.288270] dump_stack_lvl+0x73/0xb0 [ 24.288911] print_report+0xd1/0x640 [ 24.289621] ? __virt_addr_valid+0x1db/0x2d0 [ 24.290214] ? kasan_complete_mode_report_info+0x64/0x200 [ 24.290846] kasan_report+0x102/0x140 [ 24.291398] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 24.292344] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 24.292970] __asan_report_load1_noabort+0x18/0x20 [ 24.293598] kmem_cache_rcu_uaf+0x3e5/0x510 [ 24.294338] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 24.295104] ? finish_task_switch.isra.0+0x153/0x700 [ 24.295602] ? __switch_to+0x5d9/0xf60 [ 24.296537] ? __pfx_read_tsc+0x10/0x10 [ 24.297295] ? ktime_get_ts64+0x86/0x230 [ 24.298034] kunit_try_run_case+0x1b3/0x490 [ 24.298590] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.299606] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 24.300936] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 24.301739] ? __kthread_parkme+0x82/0x160 [ 24.302652] ? preempt_count_sub+0x50/0x80 [ 24.303230] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.304061] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 24.304797] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.305200] kthread+0x257/0x310 [ 24.305640] ? __pfx_kthread+0x10/0x10 [ 24.306213] ret_from_fork+0x41/0x80 [ 24.306922] ? __pfx_kthread+0x10/0x10 [ 24.307231] ret_from_fork_asm+0x1a/0x30 [ 24.307617] </TASK> [ 24.308170] [ 24.308925] Allocated by task 221: [ 24.309290] kasan_save_stack+0x3d/0x60 [ 24.309685] kasan_save_track+0x18/0x40 [ 24.310576] kasan_save_alloc_info+0x3b/0x50 [ 24.310987] __kasan_slab_alloc+0x91/0xa0 [ 24.312000] kmem_cache_alloc_noprof+0x11e/0x3e0 [ 24.312776] kmem_cache_rcu_uaf+0x156/0x510 [ 24.313281] kunit_try_run_case+0x1b3/0x490 [ 24.313885] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.314711] kthread+0x257/0x310 [ 24.315228] ret_from_fork+0x41/0x80 [ 24.315757] ret_from_fork_asm+0x1a/0x30 [ 24.316966] [ 24.317189] Freed by task 0: [ 24.317528] kasan_save_stack+0x3d/0x60 [ 24.318261] kasan_save_track+0x18/0x40 [ 24.318797] kasan_save_free_info+0x3f/0x60 [ 24.319398] __kasan_slab_free+0x56/0x70 [ 24.320226] slab_free_after_rcu_debug+0xe4/0x310 [ 24.320670] rcu_core+0x680/0x1d70 [ 24.321470] rcu_core_si+0x12/0x20 [ 24.321705] handle_softirqs+0x209/0x720 [ 24.322059] __irq_exit_rcu+0xc9/0x110 [ 24.322881] irq_exit_rcu+0x12/0x20 [ 24.323234] sysvec_apic_timer_interrupt+0x81/0x90 [ 24.324252] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 24.325375] [ 24.325629] Last potentially related work creation: [ 24.326188] kasan_save_stack+0x3d/0x60 [ 24.326636] kasan_record_aux_stack+0xb2/0xc0 [ 24.327911] kmem_cache_free+0x284/0x420 [ 24.328273] kmem_cache_rcu_uaf+0x195/0x510 [ 24.328802] kunit_try_run_case+0x1b3/0x490 [ 24.329300] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.329925] kthread+0x257/0x310 [ 24.331114] ret_from_fork+0x41/0x80 [ 24.331486] ret_from_fork_asm+0x1a/0x30 [ 24.331852] [ 24.332341] The buggy address belongs to the object at ffff888102997000 [ 24.332341] which belongs to the cache test_cache of size 200 [ 24.334248] The buggy address is located 0 bytes inside of [ 24.334248] freed 200-byte region [ffff888102997000, ffff8881029970c8) [ 24.335792] [ 24.335976] The buggy address belongs to the physical page: [ 24.336815] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102997 [ 24.337415] flags: 0x200000000000000(node=0|zone=2) [ 24.338012] page_type: f5(slab) [ 24.338726] raw: 0200000000000000 ffff8881010c4dc0 dead000000000122 0000000000000000 [ 24.339725] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 24.340653] page dumped because: kasan: bad access detected [ 24.341826] [ 24.342282] Memory state around the buggy address: [ 24.342993] ffff888102996f00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.343708] ffff888102996f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.344596] >ffff888102997000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.345543] ^ [ 24.345861] ffff888102997080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.346465] ffff888102997100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.347512] ==================================================================