Date
May 29, 2025, 7:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.431681] ================================================================== [ 22.432087] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 22.432620] Read of size 8 at addr fff00000c669e640 by task kunit_try_catch/200 [ 22.432787] [ 22.433072] CPU: 1 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250529 #1 PREEMPT [ 22.433556] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.433630] Hardware name: linux,dummy-virt (DT) [ 22.433716] Call trace: [ 22.433778] show_stack+0x20/0x38 (C) [ 22.433911] dump_stack_lvl+0x8c/0xd0 [ 22.434383] print_report+0x118/0x608 [ 22.434532] kasan_report+0xdc/0x128 [ 22.434664] __asan_report_load8_noabort+0x20/0x30 [ 22.434793] workqueue_uaf+0x480/0x4a8 [ 22.434907] kunit_try_run_case+0x170/0x3f0 [ 22.435012] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.435612] kthread+0x328/0x630 [ 22.436111] ret_from_fork+0x10/0x20 [ 22.436347] [ 22.436791] Allocated by task 200: [ 22.436927] kasan_save_stack+0x3c/0x68 [ 22.437049] kasan_save_track+0x20/0x40 [ 22.437513] kasan_save_alloc_info+0x40/0x58 [ 22.437694] __kasan_kmalloc+0xd4/0xd8 [ 22.437811] __kmalloc_cache_noprof+0x15c/0x3c0 [ 22.438448] workqueue_uaf+0x13c/0x4a8 [ 22.438669] kunit_try_run_case+0x170/0x3f0 [ 22.439422] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.439646] kthread+0x328/0x630 [ 22.439829] ret_from_fork+0x10/0x20 [ 22.439922] [ 22.440456] Freed by task 44: [ 22.440540] kasan_save_stack+0x3c/0x68 [ 22.441032] kasan_save_track+0x20/0x40 [ 22.441146] kasan_save_free_info+0x4c/0x78 [ 22.441789] __kasan_slab_free+0x6c/0x98 [ 22.442086] kfree+0x214/0x3c8 [ 22.442188] workqueue_uaf_work+0x18/0x30 [ 22.442284] process_one_work+0x530/0xf98 [ 22.443032] worker_thread+0x8ac/0xf28 [ 22.443156] kthread+0x328/0x630 [ 22.443320] ret_from_fork+0x10/0x20 [ 22.443518] [ 22.443830] Last potentially related work creation: [ 22.443957] kasan_save_stack+0x3c/0x68 [ 22.444319] kasan_record_aux_stack+0xb4/0xc8 [ 22.444439] __queue_work+0x65c/0x1010 [ 22.444535] queue_work_on+0xbc/0xf8 [ 22.444914] workqueue_uaf+0x210/0x4a8 [ 22.445365] kunit_try_run_case+0x170/0x3f0 [ 22.445683] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.445804] kthread+0x328/0x630 [ 22.446165] ret_from_fork+0x10/0x20 [ 22.446274] [ 22.446731] The buggy address belongs to the object at fff00000c669e640 [ 22.446731] which belongs to the cache kmalloc-32 of size 32 [ 22.446922] The buggy address is located 0 bytes inside of [ 22.446922] freed 32-byte region [fff00000c669e640, fff00000c669e660) [ 22.447084] [ 22.447454] The buggy address belongs to the physical page: [ 22.447831] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10669e [ 22.448083] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.448300] page_type: f5(slab) [ 22.448642] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 22.448993] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 22.449318] page dumped because: kasan: bad access detected [ 22.449451] [ 22.449512] Memory state around the buggy address: [ 22.449944] fff00000c669e500: 00 00 00 fc fc fc fc fc 00 00 03 fc fc fc fc fc [ 22.450082] fff00000c669e580: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 22.450643] >fff00000c669e600: 00 00 00 07 fc fc fc fc fa fb fb fb fc fc fc fc [ 22.450931] ^ [ 22.451247] fff00000c669e680: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.451384] fff00000c669e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.451503] ==================================================================
[ 11.458669] ================================================================== [ 11.459459] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560 [ 11.459829] Read of size 8 at addr ffff8881028a3740 by task kunit_try_catch/217 [ 11.460113] [ 11.460221] CPU: 1 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250529 #1 PREEMPT(voluntary) [ 11.460268] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.460280] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.460309] Call Trace: [ 11.460321] <TASK> [ 11.460336] dump_stack_lvl+0x73/0xb0 [ 11.460362] print_report+0xd1/0x650 [ 11.460384] ? __virt_addr_valid+0x1db/0x2d0 [ 11.460406] ? workqueue_uaf+0x4d6/0x560 [ 11.460428] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.460450] ? workqueue_uaf+0x4d6/0x560 [ 11.460472] kasan_report+0x141/0x180 [ 11.460494] ? workqueue_uaf+0x4d6/0x560 [ 11.460520] __asan_report_load8_noabort+0x18/0x20 [ 11.460541] workqueue_uaf+0x4d6/0x560 [ 11.460563] ? __pfx_workqueue_uaf+0x10/0x10 [ 11.460585] ? __schedule+0x10cc/0x2b60 [ 11.461012] ? __pfx_read_tsc+0x10/0x10 [ 11.461054] ? ktime_get_ts64+0x86/0x230 [ 11.461084] kunit_try_run_case+0x1a5/0x480 [ 11.461378] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.461404] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.461430] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.461454] ? __kthread_parkme+0x82/0x180 [ 11.461474] ? preempt_count_sub+0x50/0x80 [ 11.461498] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.461519] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.461542] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.461566] kthread+0x337/0x6f0 [ 11.461585] ? trace_preempt_on+0x20/0xc0 [ 11.461622] ? __pfx_kthread+0x10/0x10 [ 11.461643] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.461665] ? calculate_sigpending+0x7b/0xa0 [ 11.461688] ? __pfx_kthread+0x10/0x10 [ 11.461710] ret_from_fork+0x116/0x1d0 [ 11.461727] ? __pfx_kthread+0x10/0x10 [ 11.461754] ret_from_fork_asm+0x1a/0x30 [ 11.461784] </TASK> [ 11.461795] [ 11.472184] Allocated by task 217: [ 11.472335] kasan_save_stack+0x45/0x70 [ 11.472679] kasan_save_track+0x18/0x40 [ 11.472923] kasan_save_alloc_info+0x3b/0x50 [ 11.473215] __kasan_kmalloc+0xb7/0xc0 [ 11.473474] __kmalloc_cache_noprof+0x189/0x420 [ 11.473715] workqueue_uaf+0x152/0x560 [ 11.474068] kunit_try_run_case+0x1a5/0x480 [ 11.474230] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.474487] kthread+0x337/0x6f0 [ 11.474801] ret_from_fork+0x116/0x1d0 [ 11.475029] ret_from_fork_asm+0x1a/0x30 [ 11.475224] [ 11.475331] Freed by task 44: [ 11.475473] kasan_save_stack+0x45/0x70 [ 11.475667] kasan_save_track+0x18/0x40 [ 11.476227] kasan_save_free_info+0x3f/0x60 [ 11.476394] __kasan_slab_free+0x56/0x70 [ 11.476738] kfree+0x222/0x3f0 [ 11.477042] workqueue_uaf_work+0x12/0x20 [ 11.477222] process_one_work+0x5ee/0xf60 [ 11.477557] worker_thread+0x758/0x1220 [ 11.477888] kthread+0x337/0x6f0 [ 11.478136] ret_from_fork+0x116/0x1d0 [ 11.478452] ret_from_fork_asm+0x1a/0x30 [ 11.478656] [ 11.478972] Last potentially related work creation: [ 11.479219] kasan_save_stack+0x45/0x70 [ 11.479412] kasan_record_aux_stack+0xb2/0xc0 [ 11.479628] __queue_work+0x626/0xeb0 [ 11.480090] queue_work_on+0xb6/0xc0 [ 11.480267] workqueue_uaf+0x26d/0x560 [ 11.480417] kunit_try_run_case+0x1a5/0x480 [ 11.480645] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.481058] kthread+0x337/0x6f0 [ 11.481321] ret_from_fork+0x116/0x1d0 [ 11.481651] ret_from_fork_asm+0x1a/0x30 [ 11.481990] [ 11.482163] The buggy address belongs to the object at ffff8881028a3740 [ 11.482163] which belongs to the cache kmalloc-32 of size 32 [ 11.482705] The buggy address is located 0 bytes inside of [ 11.482705] freed 32-byte region [ffff8881028a3740, ffff8881028a3760) [ 11.483656] [ 11.483821] The buggy address belongs to the physical page: [ 11.484284] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1028a3 [ 11.484890] flags: 0x200000000000000(node=0|zone=2) [ 11.485232] page_type: f5(slab) [ 11.485416] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 11.485732] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 11.486426] page dumped because: kasan: bad access detected [ 11.486852] [ 11.487045] Memory state around the buggy address: [ 11.487306] ffff8881028a3600: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 11.487804] ffff8881028a3680: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 11.488155] >ffff8881028a3700: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 11.488586] ^ [ 11.489014] ffff8881028a3780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.489472] ffff8881028a3800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.490062] ==================================================================