Date
June 2, 2025, 2:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.859151] ================================================================== [ 19.860023] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 19.862370] Read of size 16 at addr fff00000c5bb2260 by task kunit_try_catch/155 [ 19.863755] [ 19.864548] CPU: 0 UID: 0 PID: 155 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 19.864763] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.864820] Hardware name: linux,dummy-virt (DT) [ 19.864889] Call trace: [ 19.864942] dump_backtrace+0x9c/0x128 [ 19.865055] show_stack+0x20/0x38 [ 19.865131] dump_stack_lvl+0x8c/0xd0 [ 19.865218] print_report+0x118/0x5f0 [ 19.865312] kasan_report+0xdc/0x128 [ 19.865379] __asan_report_load16_noabort+0x20/0x30 [ 19.865462] kmalloc_uaf_16+0x3bc/0x438 [ 19.865551] kunit_try_run_case+0x170/0x3f0 [ 19.865637] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.865720] kthread+0x24c/0x2d0 [ 19.865796] ret_from_fork+0x10/0x20 [ 19.865885] [ 19.874636] Allocated by task 155: [ 19.875302] kasan_save_stack+0x3c/0x68 [ 19.876102] kasan_save_track+0x20/0x40 [ 19.876532] kasan_save_alloc_info+0x40/0x58 [ 19.877075] __kasan_kmalloc+0xd4/0xd8 [ 19.877557] __kmalloc_cache_noprof+0x154/0x320 [ 19.878145] kmalloc_uaf_16+0x144/0x438 [ 19.878571] kunit_try_run_case+0x170/0x3f0 [ 19.879001] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.879558] kthread+0x24c/0x2d0 [ 19.880117] ret_from_fork+0x10/0x20 [ 19.880506] [ 19.880712] Freed by task 155: [ 19.881121] kasan_save_stack+0x3c/0x68 [ 19.881499] kasan_save_track+0x20/0x40 [ 19.881957] kasan_save_free_info+0x4c/0x78 [ 19.882441] __kasan_slab_free+0x6c/0x98 [ 19.882886] kfree+0x110/0x3b8 [ 19.883397] kmalloc_uaf_16+0x198/0x438 [ 19.883968] kunit_try_run_case+0x170/0x3f0 [ 19.884627] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.885180] kthread+0x24c/0x2d0 [ 19.885613] ret_from_fork+0x10/0x20 [ 19.886097] [ 19.886414] The buggy address belongs to the object at fff00000c5bb2260 [ 19.886414] which belongs to the cache kmalloc-16 of size 16 [ 19.887463] The buggy address is located 0 bytes inside of [ 19.887463] freed 16-byte region [fff00000c5bb2260, fff00000c5bb2270) [ 19.888227] [ 19.888440] The buggy address belongs to the physical page: [ 19.888772] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105bb2 [ 19.889566] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.890077] page_type: f5(slab) [ 19.890591] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.891286] raw: 0000000000000000 0000000080800080 00000001f5000000 0000000000000000 [ 19.892166] page dumped because: kasan: bad access detected [ 19.892485] [ 19.892986] Memory state around the buggy address: [ 19.893612] fff00000c5bb2100: 00 02 fc fc 00 05 fc fc fa fb fc fc 00 02 fc fc [ 19.894189] fff00000c5bb2180: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.894635] >fff00000c5bb2200: fa fb fc fc 00 04 fc fc 00 00 fc fc fa fb fc fc [ 19.895763] ^ [ 19.896292] fff00000c5bb2280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.896831] fff00000c5bb2300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.897340] ==================================================================
[ 12.074933] ================================================================== [ 12.075381] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47d/0x4c0 [ 12.076092] Read of size 16 at addr ffff8881024e4180 by task kunit_try_catch/173 [ 12.076937] [ 12.077097] CPU: 0 UID: 0 PID: 173 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 12.077176] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.077200] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.077235] Call Trace: [ 12.077260] <TASK> [ 12.077284] dump_stack_lvl+0x73/0xb0 [ 12.077505] print_report+0xd1/0x640 [ 12.077552] ? __virt_addr_valid+0x1db/0x2d0 [ 12.077592] ? kmalloc_uaf_16+0x47d/0x4c0 [ 12.077625] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.077652] ? kmalloc_uaf_16+0x47d/0x4c0 [ 12.077696] kasan_report+0x140/0x180 [ 12.077719] ? kmalloc_uaf_16+0x47d/0x4c0 [ 12.077744] __asan_report_load16_noabort+0x18/0x20 [ 12.077764] kmalloc_uaf_16+0x47d/0x4c0 [ 12.077785] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 12.077806] ? __schedule+0xc49/0x27a0 [ 12.077826] ? __pfx_read_tsc+0x10/0x10 [ 12.077844] ? ktime_get_ts64+0x84/0x230 [ 12.077870] kunit_try_run_case+0x1a6/0x480 [ 12.077903] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.077927] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 12.077948] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.077972] ? __kthread_parkme+0x82/0x160 [ 12.077991] ? preempt_count_sub+0x50/0x80 [ 12.078014] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.078033] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.078070] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.078138] kthread+0x257/0x310 [ 12.078171] ? __pfx_kthread+0x10/0x10 [ 12.078197] ret_from_fork+0x41/0x80 [ 12.078217] ? __pfx_kthread+0x10/0x10 [ 12.078235] ret_from_fork_asm+0x1a/0x30 [ 12.078264] </TASK> [ 12.078276] [ 12.088456] Allocated by task 173: [ 12.088771] kasan_save_stack+0x45/0x70 [ 12.088979] kasan_save_track+0x18/0x40 [ 12.089149] kasan_save_alloc_info+0x3b/0x50 [ 12.089654] __kasan_kmalloc+0xb7/0xc0 [ 12.090212] __kmalloc_cache_noprof+0x168/0x350 [ 12.090591] kmalloc_uaf_16+0x15c/0x4c0 [ 12.091120] kunit_try_run_case+0x1a6/0x480 [ 12.091517] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.091915] kthread+0x257/0x310 [ 12.092085] ret_from_fork+0x41/0x80 [ 12.092237] ret_from_fork_asm+0x1a/0x30 [ 12.092496] [ 12.093045] Freed by task 173: [ 12.093387] kasan_save_stack+0x45/0x70 [ 12.093932] kasan_save_track+0x18/0x40 [ 12.094220] kasan_save_free_info+0x3f/0x60 [ 12.094538] __kasan_slab_free+0x56/0x70 [ 12.094687] kfree+0x123/0x3d0 [ 12.094913] kmalloc_uaf_16+0x1d7/0x4c0 [ 12.095300] kunit_try_run_case+0x1a6/0x480 [ 12.095781] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.096500] kthread+0x257/0x310 [ 12.096761] ret_from_fork+0x41/0x80 [ 12.097144] ret_from_fork_asm+0x1a/0x30 [ 12.097593] [ 12.097713] The buggy address belongs to the object at ffff8881024e4180 [ 12.097713] which belongs to the cache kmalloc-16 of size 16 [ 12.098609] The buggy address is located 0 bytes inside of [ 12.098609] freed 16-byte region [ffff8881024e4180, ffff8881024e4190) [ 12.099508] [ 12.099738] The buggy address belongs to the physical page: [ 12.099987] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1024e4 [ 12.100796] flags: 0x200000000000000(node=0|zone=2) [ 12.101405] page_type: f5(slab) [ 12.101580] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.101800] raw: 0000000000000000 0000000080800080 00000001f5000000 0000000000000000 [ 12.102258] page dumped because: kasan: bad access detected [ 12.102727] [ 12.102916] Memory state around the buggy address: [ 12.103447] ffff8881024e4080: fa fb fc fc 00 03 fc fc 00 03 fc fc 00 05 fc fc [ 12.103731] ffff8881024e4100: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 12.104152] >ffff8881024e4180: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.104602] ^ [ 12.104872] ffff8881024e4200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.105348] ffff8881024e4280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.105723] ==================================================================