Date
Nov. 28, 2024, 2:36 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.542980] ================================================================== [ 31.543918] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 31.545564] Read of size 8 at addr fff00000c63af680 by task kunit_try_catch/188 [ 31.546442] [ 31.546810] CPU: 1 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241128 #1 [ 31.548039] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.548509] Hardware name: linux,dummy-virt (DT) [ 31.549679] Call trace: [ 31.550221] show_stack+0x20/0x38 (C) [ 31.550827] dump_stack_lvl+0x8c/0xd0 [ 31.551433] print_report+0x118/0x5e0 [ 31.552043] kasan_report+0xc8/0x118 [ 31.552665] __asan_report_load8_noabort+0x20/0x30 [ 31.553371] workqueue_uaf+0x480/0x4a8 [ 31.554153] kunit_try_run_case+0x14c/0x3d0 [ 31.554794] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.555565] kthread+0x24c/0x2d0 [ 31.556104] ret_from_fork+0x10/0x20 [ 31.556727] [ 31.557347] Allocated by task 188: [ 31.557824] kasan_save_stack+0x3c/0x68 [ 31.558433] kasan_save_track+0x20/0x40 [ 31.558985] kasan_save_alloc_info+0x40/0x58 [ 31.559508] __kasan_kmalloc+0xd4/0xd8 [ 31.560084] __kmalloc_cache_noprof+0x15c/0x3c0 [ 31.560651] workqueue_uaf+0x13c/0x4a8 [ 31.561565] kunit_try_run_case+0x14c/0x3d0 [ 31.562236] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.562807] kthread+0x24c/0x2d0 [ 31.563351] ret_from_fork+0x10/0x20 [ 31.563867] [ 31.564210] Freed by task 8: [ 31.564614] kasan_save_stack+0x3c/0x68 [ 31.565552] kasan_save_track+0x20/0x40 [ 31.566232] kasan_save_free_info+0x4c/0x78 [ 31.567095] __kasan_slab_free+0x6c/0x98 [ 31.567602] kfree+0x114/0x3c8 [ 31.568070] workqueue_uaf_work+0x18/0x30 [ 31.568627] process_one_work+0x530/0xf98 [ 31.569237] worker_thread+0x614/0xf28 [ 31.570185] kthread+0x24c/0x2d0 [ 31.570809] ret_from_fork+0x10/0x20 [ 31.571497] [ 31.571839] Last potentially related work creation: [ 31.572415] kasan_save_stack+0x3c/0x68 [ 31.572907] __kasan_record_aux_stack+0xbc/0xe8 [ 31.573756] kasan_record_aux_stack_noalloc+0x14/0x20 [ 31.574643] __queue_work+0x65c/0xfd8 [ 31.575342] queue_work_on+0xbc/0xf8 [ 31.575835] workqueue_uaf+0x210/0x4a8 [ 31.576351] kunit_try_run_case+0x14c/0x3d0 [ 31.576978] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.577685] kthread+0x24c/0x2d0 [ 31.578162] ret_from_fork+0x10/0x20 [ 31.578644] [ 31.578979] The buggy address belongs to the object at fff00000c63af680 [ 31.578979] which belongs to the cache kmalloc-32 of size 32 [ 31.580613] The buggy address is located 0 bytes inside of [ 31.580613] freed 32-byte region [fff00000c63af680, fff00000c63af6a0) [ 31.582218] [ 31.582564] The buggy address belongs to the physical page: [ 31.583169] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1063af [ 31.584101] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.584861] page_type: f5(slab) [ 31.585812] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 31.586628] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 31.587437] page dumped because: kasan: bad access detected [ 31.587986] [ 31.588343] Memory state around the buggy address: [ 31.589380] fff00000c63af580: 00 00 00 fc fc fc fc fc 00 00 03 fc fc fc fc fc [ 31.590203] fff00000c63af600: 00 00 07 fc fc fc fc fc 00 00 00 07 fc fc fc fc [ 31.590953] >fff00000c63af680: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 31.591784] ^ [ 31.592244] fff00000c63af700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.593603] fff00000c63af780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.594266] ==================================================================
[ 22.477462] ================================================================== [ 22.478760] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d8/0x560 [ 22.479469] Read of size 8 at addr ffff888101b55c80 by task kunit_try_catch/208 [ 22.480013] [ 22.480460] CPU: 1 UID: 0 PID: 208 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241128 #1 [ 22.481812] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.482493] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.483435] Call Trace: [ 22.483786] <TASK> [ 22.484414] dump_stack_lvl+0x73/0xb0 [ 22.485019] print_report+0xd1/0x640 [ 22.485697] ? __virt_addr_valid+0x1db/0x2d0 [ 22.486231] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.486762] kasan_report+0x102/0x140 [ 22.487188] ? workqueue_uaf+0x4d8/0x560 [ 22.487621] ? workqueue_uaf+0x4d8/0x560 [ 22.488103] __asan_report_load8_noabort+0x18/0x20 [ 22.488453] workqueue_uaf+0x4d8/0x560 [ 22.489137] ? __pfx_workqueue_uaf+0x10/0x10 [ 22.490025] ? __schedule+0xc3e/0x2790 [ 22.490515] ? __pfx_read_tsc+0x10/0x10 [ 22.490816] ? ktime_get_ts64+0x84/0x230 [ 22.491106] kunit_try_run_case+0x1b3/0x490 [ 22.491656] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.492197] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 22.492764] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.493131] ? __kthread_parkme+0x82/0x160 [ 22.494214] ? preempt_count_sub+0x50/0x80 [ 22.495147] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.495805] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.496709] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.497497] kthread+0x257/0x310 [ 22.497918] ? __pfx_kthread+0x10/0x10 [ 22.498414] ret_from_fork+0x41/0x80 [ 22.498771] ? __pfx_kthread+0x10/0x10 [ 22.499630] ret_from_fork_asm+0x1a/0x30 [ 22.500272] </TASK> [ 22.500547] [ 22.500796] Allocated by task 208: [ 22.501063] kasan_save_stack+0x3d/0x60 [ 22.502118] kasan_save_track+0x18/0x40 [ 22.502494] kasan_save_alloc_info+0x3b/0x50 [ 22.502853] __kasan_kmalloc+0xb7/0xc0 [ 22.503264] __kmalloc_cache_noprof+0x184/0x410 [ 22.503761] workqueue_uaf+0x153/0x560 [ 22.504353] kunit_try_run_case+0x1b3/0x490 [ 22.504826] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.505565] kthread+0x257/0x310 [ 22.505975] ret_from_fork+0x41/0x80 [ 22.506523] ret_from_fork_asm+0x1a/0x30 [ 22.506952] [ 22.507785] Freed by task 71: [ 22.508044] kasan_save_stack+0x3d/0x60 [ 22.508431] kasan_save_track+0x18/0x40 [ 22.508908] kasan_save_free_info+0x3f/0x60 [ 22.509573] __kasan_slab_free+0x56/0x70 [ 22.509906] kfree+0x123/0x3f0 [ 22.510463] workqueue_uaf_work+0x12/0x20 [ 22.510882] process_one_work+0x5ee/0xf60 [ 22.511353] worker_thread+0x720/0x1300 [ 22.511631] kthread+0x257/0x310 [ 22.512052] ret_from_fork+0x41/0x80 [ 22.512536] ret_from_fork_asm+0x1a/0x30 [ 22.513007] [ 22.513774] Last potentially related work creation: [ 22.514117] kasan_save_stack+0x3d/0x60 [ 22.514704] __kasan_record_aux_stack+0xae/0xc0 [ 22.515320] kasan_record_aux_stack_noalloc+0xf/0x20 [ 22.515757] __queue_work+0x67e/0xf70 [ 22.516020] queue_work_on+0x74/0xa0 [ 22.516569] workqueue_uaf+0x26e/0x560 [ 22.517048] kunit_try_run_case+0x1b3/0x490 [ 22.517693] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.518046] kthread+0x257/0x310 [ 22.518808] ret_from_fork+0x41/0x80 [ 22.519261] ret_from_fork_asm+0x1a/0x30 [ 22.519867] [ 22.520138] The buggy address belongs to the object at ffff888101b55c80 [ 22.520138] which belongs to the cache kmalloc-32 of size 32 [ 22.521363] The buggy address is located 0 bytes inside of [ 22.521363] freed 32-byte region [ffff888101b55c80, ffff888101b55ca0) [ 22.522393] [ 22.522550] The buggy address belongs to the physical page: [ 22.522874] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101b55 [ 22.523764] flags: 0x200000000000000(node=0|zone=2) [ 22.524480] page_type: f5(slab) [ 22.524761] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 22.525917] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 22.526856] page dumped because: kasan: bad access detected [ 22.527506] [ 22.527729] Memory state around the buggy address: [ 22.528228] ffff888101b55b80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 22.528749] ffff888101b55c00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 22.529586] >ffff888101b55c80: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 22.530147] ^ [ 22.531000] ffff888101b55d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.532014] ffff888101b55d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.532694] ==================================================================