Date
May 12, 2025, 6:12 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.416504] ================================================================== [ 19.417283] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 19.418000] Read of size 8 at addr fff00000c6534e40 by task kunit_try_catch/189 [ 19.418763] [ 19.419099] CPU: 0 UID: 0 PID: 189 Comm: kunit_try_catch Tainted: G B N 6.14.7-rc1 #1 [ 19.419305] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.419365] Hardware name: linux,dummy-virt (DT) [ 19.419466] Call trace: [ 19.419516] show_stack+0x20/0x38 (C) [ 19.419643] dump_stack_lvl+0x8c/0xd0 [ 19.419783] print_report+0x118/0x608 [ 19.419906] kasan_report+0xdc/0x128 [ 19.420001] __asan_report_load8_noabort+0x20/0x30 [ 19.420104] workqueue_uaf+0x480/0x4a8 [ 19.420199] kunit_try_run_case+0x170/0x3f0 [ 19.420309] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.420438] kthread+0x318/0x620 [ 19.420552] ret_from_fork+0x10/0x20 [ 19.420660] [ 19.425805] Allocated by task 189: [ 19.426311] kasan_save_stack+0x3c/0x68 [ 19.427231] kasan_save_track+0x20/0x40 [ 19.427667] kasan_save_alloc_info+0x40/0x58 [ 19.428252] __kasan_kmalloc+0xd4/0xd8 [ 19.428648] __kmalloc_cache_noprof+0x15c/0x3c0 [ 19.429229] workqueue_uaf+0x13c/0x4a8 [ 19.429676] kunit_try_run_case+0x170/0x3f0 [ 19.430227] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.431239] kthread+0x318/0x620 [ 19.431796] ret_from_fork+0x10/0x20 [ 19.431994] [ 19.432101] Freed by task 47: [ 19.432238] kasan_save_stack+0x3c/0x68 [ 19.432405] kasan_save_track+0x20/0x40 [ 19.432560] kasan_save_free_info+0x4c/0x78 [ 19.432720] __kasan_slab_free+0x6c/0x98 [ 19.433219] kfree+0x214/0x3c8 [ 19.433661] workqueue_uaf_work+0x18/0x30 [ 19.434198] process_one_work+0x530/0xf98 [ 19.435065] worker_thread+0x614/0xf28 [ 19.435600] kthread+0x318/0x620 [ 19.436051] ret_from_fork+0x10/0x20 [ 19.436547] [ 19.436822] Last potentially related work creation: [ 19.437319] kasan_save_stack+0x3c/0x68 [ 19.437869] kasan_record_aux_stack+0xb4/0xc8 [ 19.438366] __queue_work+0x65c/0x1010 [ 19.439340] queue_work_on+0xbc/0xf8 [ 19.439761] workqueue_uaf+0x210/0x4a8 [ 19.440233] kunit_try_run_case+0x170/0x3f0 [ 19.440650] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.441184] kthread+0x318/0x620 [ 19.441582] ret_from_fork+0x10/0x20 [ 19.442006] [ 19.442263] The buggy address belongs to the object at fff00000c6534e40 [ 19.442263] which belongs to the cache kmalloc-32 of size 32 [ 19.443324] The buggy address is located 0 bytes inside of [ 19.443324] freed 32-byte region [fff00000c6534e40, fff00000c6534e60) [ 19.444373] [ 19.444693] The buggy address belongs to the physical page: [ 19.445195] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106534 [ 19.445947] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.446746] page_type: f5(slab) [ 19.447158] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.447785] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.448370] page dumped because: kasan: bad access detected [ 19.448865] [ 19.449138] Memory state around the buggy address: [ 19.449683] fff00000c6534d00: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 19.450302] fff00000c6534d80: 00 00 07 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 19.451298] >fff00000c6534e00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.451726] ^ [ 19.452133] fff00000c6534e80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.452821] fff00000c6534f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.453432] ==================================================================
[ 13.014744] ================================================================== [ 13.016031] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d8/0x560 [ 13.016429] Read of size 8 at addr ffff888101b25f00 by task kunit_try_catch/208 [ 13.017017] [ 13.017214] CPU: 1 UID: 0 PID: 208 Comm: kunit_try_catch Tainted: G B N 6.14.7-rc1 #1 [ 13.017264] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.017276] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.017298] Call Trace: [ 13.017314] <TASK> [ 13.017335] dump_stack_lvl+0x73/0xb0 [ 13.017366] print_report+0xd1/0x650 [ 13.017388] ? __virt_addr_valid+0x1db/0x2d0 [ 13.017410] ? workqueue_uaf+0x4d8/0x560 [ 13.017431] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.017455] ? workqueue_uaf+0x4d8/0x560 [ 13.017475] kasan_report+0x140/0x180 [ 13.017496] ? workqueue_uaf+0x4d8/0x560 [ 13.017520] __asan_report_load8_noabort+0x18/0x20 [ 13.017543] workqueue_uaf+0x4d8/0x560 [ 13.017576] ? __pfx_workqueue_uaf+0x10/0x10 [ 13.017597] ? __schedule+0xce8/0x2840 [ 13.017633] ? __pfx_read_tsc+0x10/0x10 [ 13.017656] ? ktime_get_ts64+0x86/0x230 [ 13.017681] kunit_try_run_case+0x1a6/0x480 [ 13.017705] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.017725] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 13.017759] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.017783] ? __kthread_parkme+0x82/0x160 [ 13.017806] ? preempt_count_sub+0x50/0x80 [ 13.017830] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.017861] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.017886] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.017911] kthread+0x324/0x6e0 [ 13.017932] ? trace_preempt_on+0x20/0xc0 [ 13.017956] ? __pfx_kthread+0x10/0x10 [ 13.017977] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.017999] ? calculate_sigpending+0x7b/0xa0 [ 13.018021] ? __pfx_kthread+0x10/0x10 [ 13.018056] ret_from_fork+0x41/0x80 [ 13.018075] ? __pfx_kthread+0x10/0x10 [ 13.018096] ret_from_fork_asm+0x1a/0x30 [ 13.018128] </TASK> [ 13.018139] [ 13.029829] Allocated by task 208: [ 13.030332] kasan_save_stack+0x45/0x70 [ 13.030768] kasan_save_track+0x18/0x40 [ 13.031193] kasan_save_alloc_info+0x3b/0x50 [ 13.031351] __kasan_kmalloc+0xb7/0xc0 [ 13.031485] __kmalloc_cache_noprof+0x18a/0x420 [ 13.031644] workqueue_uaf+0x153/0x560 [ 13.031778] kunit_try_run_case+0x1a6/0x480 [ 13.032536] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.033189] kthread+0x324/0x6e0 [ 13.033691] ret_from_fork+0x41/0x80 [ 13.034280] ret_from_fork_asm+0x1a/0x30 [ 13.034773] [ 13.035245] Freed by task 84: [ 13.035397] kasan_save_stack+0x45/0x70 [ 13.035551] kasan_save_track+0x18/0x40 [ 13.035686] kasan_save_free_info+0x3f/0x60 [ 13.035834] __kasan_slab_free+0x56/0x70 [ 13.035986] kfree+0x224/0x3f0 [ 13.036700] workqueue_uaf_work+0x12/0x20 [ 13.037297] process_one_work+0x5ee/0xf60 [ 13.037812] worker_thread+0x720/0x1300 [ 13.038387] kthread+0x324/0x6e0 [ 13.038830] ret_from_fork+0x41/0x80 [ 13.039338] ret_from_fork_asm+0x1a/0x30 [ 13.039849] [ 13.040017] Last potentially related work creation: [ 13.040714] kasan_save_stack+0x45/0x70 [ 13.040878] kasan_record_aux_stack+0xb2/0xc0 [ 13.041042] __queue_work+0x626/0xeb0 [ 13.041608] queue_work_on+0x74/0xa0 [ 13.042146] workqueue_uaf+0x26e/0x560 [ 13.042644] kunit_try_run_case+0x1a6/0x480 [ 13.043177] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.043377] kthread+0x324/0x6e0 [ 13.043989] ret_from_fork+0x41/0x80 [ 13.044497] ret_from_fork_asm+0x1a/0x30 [ 13.044651] [ 13.044746] The buggy address belongs to the object at ffff888101b25f00 [ 13.044746] which belongs to the cache kmalloc-32 of size 32 [ 13.046346] The buggy address is located 0 bytes inside of [ 13.046346] freed 32-byte region [ffff888101b25f00, ffff888101b25f20) [ 13.046702] [ 13.046777] The buggy address belongs to the physical page: [ 13.046968] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101b25 [ 13.047999] flags: 0x200000000000000(node=0|zone=2) [ 13.048442] page_type: f5(slab) [ 13.049013] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.049851] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.050801] page dumped because: kasan: bad access detected [ 13.051464] [ 13.051544] Memory state around the buggy address: [ 13.051707] ffff888101b25e00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.051940] ffff888101b25e80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.052489] >ffff888101b25f00: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 13.052809] ^ [ 13.052993] ffff888101b25f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.053558] ffff888101b26000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.054023] ==================================================================