Date
May 15, 2025, 10:38 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.529804] ================================================================== [ 18.530202] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 18.530530] Read of size 8 at addr fff00000c1764bc0 by task kunit_try_catch/200 [ 18.531179] [ 18.531377] CPU: 1 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250515 #1 PREEMPT [ 18.531890] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.532083] Hardware name: linux,dummy-virt (DT) [ 18.532254] Call trace: [ 18.532373] show_stack+0x20/0x38 (C) [ 18.532630] dump_stack_lvl+0x8c/0xd0 [ 18.533054] print_report+0x118/0x608 [ 18.533231] kasan_report+0xdc/0x128 [ 18.533619] __asan_report_load8_noabort+0x20/0x30 [ 18.533674] workqueue_uaf+0x480/0x4a8 [ 18.534243] kunit_try_run_case+0x170/0x3f0 [ 18.534377] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.534714] kthread+0x328/0x630 [ 18.535094] ret_from_fork+0x10/0x20 [ 18.535154] [ 18.535434] Allocated by task 200: [ 18.535643] kasan_save_stack+0x3c/0x68 [ 18.535944] kasan_save_track+0x20/0x40 [ 18.536151] kasan_save_alloc_info+0x40/0x58 [ 18.536342] __kasan_kmalloc+0xd4/0xd8 [ 18.536400] __kmalloc_cache_noprof+0x15c/0x3c0 [ 18.536441] workqueue_uaf+0x13c/0x4a8 [ 18.536841] kunit_try_run_case+0x170/0x3f0 [ 18.536937] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.537275] kthread+0x328/0x630 [ 18.537631] ret_from_fork+0x10/0x20 [ 18.537797] [ 18.537820] Freed by task 47: [ 18.538106] kasan_save_stack+0x3c/0x68 [ 18.538170] kasan_save_track+0x20/0x40 [ 18.538232] kasan_save_free_info+0x4c/0x78 [ 18.538347] __kasan_slab_free+0x6c/0x98 [ 18.538431] kfree+0x214/0x3c8 [ 18.538763] workqueue_uaf_work+0x18/0x30 [ 18.539065] process_one_work+0x530/0xf98 [ 18.539443] worker_thread+0x8ac/0xf28 [ 18.539725] kthread+0x328/0x630 [ 18.539837] ret_from_fork+0x10/0x20 [ 18.540442] [ 18.540485] Last potentially related work creation: [ 18.540515] kasan_save_stack+0x3c/0x68 [ 18.540559] kasan_record_aux_stack+0xb4/0xc8 [ 18.540601] __queue_work+0x65c/0x1010 [ 18.540637] queue_work_on+0xbc/0xf8 [ 18.540672] workqueue_uaf+0x210/0x4a8 [ 18.541470] kunit_try_run_case+0x170/0x3f0 [ 18.541542] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.541604] kthread+0x328/0x630 [ 18.541809] ret_from_fork+0x10/0x20 [ 18.541848] [ 18.542051] The buggy address belongs to the object at fff00000c1764bc0 [ 18.542051] which belongs to the cache kmalloc-32 of size 32 [ 18.542126] The buggy address is located 0 bytes inside of [ 18.542126] freed 32-byte region [fff00000c1764bc0, fff00000c1764be0) [ 18.542709] [ 18.542744] The buggy address belongs to the physical page: [ 18.542785] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101764 [ 18.543144] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.543722] page_type: f5(slab) [ 18.543778] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 18.544015] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 18.544143] page dumped because: kasan: bad access detected [ 18.544553] [ 18.544577] Memory state around the buggy address: [ 18.544825] fff00000c1764a80: 00 00 00 fc fc fc fc fc 00 00 03 fc fc fc fc fc [ 18.545180] fff00000c1764b00: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.545238] >fff00000c1764b80: 00 00 00 07 fc fc fc fc fa fb fb fb fc fc fc fc [ 18.545496] ^ [ 18.545693] fff00000c1764c00: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.545865] fff00000c1764c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.545980] ==================================================================
[ 14.745144] ================================================================== [ 14.746104] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560 [ 14.746708] Read of size 8 at addr ffff88810230d400 by task kunit_try_catch/218 [ 14.747121] [ 14.747353] CPU: 1 UID: 0 PID: 218 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250515 #1 PREEMPT(voluntary) [ 14.747454] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.747479] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.747518] Call Trace: [ 14.747545] <TASK> [ 14.747583] dump_stack_lvl+0x73/0xb0 [ 14.747683] print_report+0xd1/0x650 [ 14.747745] ? __virt_addr_valid+0x1db/0x2d0 [ 14.747790] ? workqueue_uaf+0x4d6/0x560 [ 14.747834] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.747879] ? workqueue_uaf+0x4d6/0x560 [ 14.747924] kasan_report+0x141/0x180 [ 14.747964] ? workqueue_uaf+0x4d6/0x560 [ 14.748009] __asan_report_load8_noabort+0x18/0x20 [ 14.748050] workqueue_uaf+0x4d6/0x560 [ 14.748094] ? __pfx_workqueue_uaf+0x10/0x10 [ 14.748136] ? irqentry_exit+0x2a/0x60 [ 14.748177] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 14.748234] ? __pfx_read_tsc+0x10/0x10 [ 14.748268] ? ktime_get_ts64+0x86/0x230 [ 14.748308] kunit_try_run_case+0x1a5/0x480 [ 14.748348] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.748385] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.748417] ? __kthread_parkme+0x82/0x180 [ 14.748488] ? _raw_spin_unlock_irqrestore+0x49/0x90 [ 14.748629] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.748665] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.748700] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.748732] kthread+0x337/0x6f0 [ 14.748761] ? trace_preempt_on+0x20/0xc0 [ 14.748797] ? __pfx_kthread+0x10/0x10 [ 14.748829] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.748852] ? calculate_sigpending+0x7b/0xa0 [ 14.748874] ? __pfx_kthread+0x10/0x10 [ 14.748894] ret_from_fork+0x116/0x1d0 [ 14.748912] ? __pfx_kthread+0x10/0x10 [ 14.748931] ret_from_fork_asm+0x1a/0x30 [ 14.748961] </TASK> [ 14.748974] [ 14.760359] Allocated by task 218: [ 14.760705] kasan_save_stack+0x45/0x70 [ 14.761024] kasan_save_track+0x18/0x40 [ 14.761907] kasan_save_alloc_info+0x3b/0x50 [ 14.762164] __kasan_kmalloc+0xb7/0xc0 [ 14.762478] __kmalloc_cache_noprof+0x189/0x420 [ 14.762944] workqueue_uaf+0x152/0x560 [ 14.763301] kunit_try_run_case+0x1a5/0x480 [ 14.763746] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.764194] kthread+0x337/0x6f0 [ 14.764461] ret_from_fork+0x116/0x1d0 [ 14.764764] ret_from_fork_asm+0x1a/0x30 [ 14.765058] [ 14.765219] Freed by task 24: [ 14.765457] kasan_save_stack+0x45/0x70 [ 14.765666] kasan_save_track+0x18/0x40 [ 14.765838] kasan_save_free_info+0x3f/0x60 [ 14.766014] __kasan_slab_free+0x56/0x70 [ 14.766170] kfree+0x222/0x3f0 [ 14.766687] workqueue_uaf_work+0x12/0x20 [ 14.767082] process_one_work+0x5ee/0xf60 [ 14.767984] worker_thread+0x725/0x1320 [ 14.768591] kthread+0x337/0x6f0 [ 14.769117] ret_from_fork+0x116/0x1d0 [ 14.769442] ret_from_fork_asm+0x1a/0x30 [ 14.769790] [ 14.769942] Last potentially related work creation: [ 14.770154] kasan_save_stack+0x45/0x70 [ 14.770450] kasan_record_aux_stack+0xb2/0xc0 [ 14.770814] __queue_work+0x626/0xeb0 [ 14.771042] queue_work_on+0xb6/0xc0 [ 14.771338] workqueue_uaf+0x26d/0x560 [ 14.771566] kunit_try_run_case+0x1a5/0x480 [ 14.771880] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.772128] kthread+0x337/0x6f0 [ 14.772296] ret_from_fork+0x116/0x1d0 [ 14.772453] ret_from_fork_asm+0x1a/0x30 [ 14.772626] [ 14.772780] The buggy address belongs to the object at ffff88810230d400 [ 14.772780] which belongs to the cache kmalloc-32 of size 32 [ 14.774472] The buggy address is located 0 bytes inside of [ 14.774472] freed 32-byte region [ffff88810230d400, ffff88810230d420) [ 14.775463] [ 14.775651] The buggy address belongs to the physical page: [ 14.775934] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10230d [ 14.776271] flags: 0x200000000000000(node=0|zone=2) [ 14.776479] page_type: f5(slab) [ 14.776748] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.777572] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.777910] page dumped because: kasan: bad access detected [ 14.778620] [ 14.778808] Memory state around the buggy address: [ 14.779116] ffff88810230d300: 00 00 05 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.779797] ffff88810230d380: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.780125] >ffff88810230d400: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 14.780893] ^ [ 14.781197] ffff88810230d480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.781634] ffff88810230d500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.782032] ==================================================================