Date
July 8, 2025, 11:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.140927] ================================================================== [ 31.141019] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 31.141109] Read of size 16 at addr fff00000c7981680 by task kunit_try_catch/199 [ 31.141160] [ 31.141196] CPU: 0 UID: 0 PID: 199 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250708 #1 PREEMPT [ 31.141314] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.141340] Hardware name: linux,dummy-virt (DT) [ 31.141372] Call trace: [ 31.141396] show_stack+0x20/0x38 (C) [ 31.141445] dump_stack_lvl+0x8c/0xd0 [ 31.141493] print_report+0x118/0x5d0 [ 31.141540] kasan_report+0xdc/0x128 [ 31.141595] __asan_report_load16_noabort+0x20/0x30 [ 31.141679] kmalloc_uaf_16+0x3bc/0x438 [ 31.141726] kunit_try_run_case+0x170/0x3f0 [ 31.141782] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.141964] kthread+0x328/0x630 [ 31.142008] ret_from_fork+0x10/0x20 [ 31.142216] [ 31.142277] Allocated by task 199: [ 31.142593] kasan_save_stack+0x3c/0x68 [ 31.142654] kasan_save_track+0x20/0x40 [ 31.142692] kasan_save_alloc_info+0x40/0x58 [ 31.142947] __kasan_kmalloc+0xd4/0xd8 [ 31.143004] __kmalloc_cache_noprof+0x16c/0x3c0 [ 31.143065] kmalloc_uaf_16+0x140/0x438 [ 31.143136] kunit_try_run_case+0x170/0x3f0 [ 31.143194] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.143282] kthread+0x328/0x630 [ 31.143364] ret_from_fork+0x10/0x20 [ 31.143416] [ 31.143470] Freed by task 199: [ 31.143559] kasan_save_stack+0x3c/0x68 [ 31.143628] kasan_save_track+0x20/0x40 [ 31.143703] kasan_save_free_info+0x4c/0x78 [ 31.143739] __kasan_slab_free+0x6c/0x98 [ 31.143802] kfree+0x214/0x3c8 [ 31.144095] kmalloc_uaf_16+0x190/0x438 [ 31.144183] kunit_try_run_case+0x170/0x3f0 [ 31.144261] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.144329] kthread+0x328/0x630 [ 31.144400] ret_from_fork+0x10/0x20 [ 31.144436] [ 31.144455] The buggy address belongs to the object at fff00000c7981680 [ 31.144455] which belongs to the cache kmalloc-16 of size 16 [ 31.144512] The buggy address is located 0 bytes inside of [ 31.144512] freed 16-byte region [fff00000c7981680, fff00000c7981690) [ 31.144598] [ 31.144667] The buggy address belongs to the physical page: [ 31.144778] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107981 [ 31.144887] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.144957] page_type: f5(slab) [ 31.145014] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 31.145112] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 31.145170] page dumped because: kasan: bad access detected [ 31.145201] [ 31.145230] Memory state around the buggy address: [ 31.145285] fff00000c7981580: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 31.145330] fff00000c7981600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 31.145372] >fff00000c7981680: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.145486] ^ [ 31.145518] fff00000c7981700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.145559] fff00000c7981780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.145595] ==================================================================
[ 23.370355] ================================================================== [ 23.371233] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 23.371585] Read of size 16 at addr ffff88810598a240 by task kunit_try_catch/216 [ 23.372090] [ 23.372194] CPU: 0 UID: 0 PID: 216 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250708 #1 PREEMPT(voluntary) [ 23.372259] Tainted: [B]=BAD_PAGE, [N]=TEST [ 23.372272] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 23.372294] Call Trace: [ 23.372307] <TASK> [ 23.372326] dump_stack_lvl+0x73/0xb0 [ 23.372357] print_report+0xd1/0x610 [ 23.372381] ? __virt_addr_valid+0x1db/0x2d0 [ 23.372406] ? kmalloc_uaf_16+0x47b/0x4c0 [ 23.372426] ? kasan_complete_mode_report_info+0x64/0x200 [ 23.372455] ? kmalloc_uaf_16+0x47b/0x4c0 [ 23.372476] kasan_report+0x141/0x180 [ 23.372499] ? kmalloc_uaf_16+0x47b/0x4c0 [ 23.372525] __asan_report_load16_noabort+0x18/0x20 [ 23.372552] kmalloc_uaf_16+0x47b/0x4c0 [ 23.372573] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 23.372596] ? __schedule+0x10cc/0x2b60 [ 23.372624] ? __pfx_read_tsc+0x10/0x10 [ 23.372649] ? ktime_get_ts64+0x86/0x230 [ 23.372676] kunit_try_run_case+0x1a5/0x480 [ 23.372699] ? __pfx_kunit_try_run_case+0x10/0x10 [ 23.372719] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 23.372741] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 23.372836] ? __kthread_parkme+0x82/0x180 [ 23.372858] ? preempt_count_sub+0x50/0x80 [ 23.372883] ? __pfx_kunit_try_run_case+0x10/0x10 [ 23.372906] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 23.372933] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 23.372962] kthread+0x337/0x6f0 [ 23.372984] ? trace_preempt_on+0x20/0xc0 [ 23.373009] ? __pfx_kthread+0x10/0x10 [ 23.373032] ? _raw_spin_unlock_irq+0x47/0x80 [ 23.373058] ? calculate_sigpending+0x7b/0xa0 [ 23.373086] ? __pfx_kthread+0x10/0x10 [ 23.373109] ret_from_fork+0x116/0x1d0 [ 23.373129] ? __pfx_kthread+0x10/0x10 [ 23.373151] ret_from_fork_asm+0x1a/0x30 [ 23.373186] </TASK> [ 23.373203] [ 23.379639] Allocated by task 216: [ 23.379764] kasan_save_stack+0x45/0x70 [ 23.379952] kasan_save_track+0x18/0x40 [ 23.380158] kasan_save_alloc_info+0x3b/0x50 [ 23.380370] __kasan_kmalloc+0xb7/0xc0 [ 23.380546] __kmalloc_cache_noprof+0x189/0x420 [ 23.380757] kmalloc_uaf_16+0x15b/0x4c0 [ 23.381078] kunit_try_run_case+0x1a5/0x480 [ 23.381408] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 23.381585] kthread+0x337/0x6f0 [ 23.381747] ret_from_fork+0x116/0x1d0 [ 23.381984] ret_from_fork_asm+0x1a/0x30 [ 23.382149] [ 23.382249] Freed by task 216: [ 23.382361] kasan_save_stack+0x45/0x70 [ 23.382553] kasan_save_track+0x18/0x40 [ 23.382712] kasan_save_free_info+0x3f/0x60 [ 23.383058] __kasan_slab_free+0x56/0x70 [ 23.383225] kfree+0x222/0x3f0 [ 23.383394] kmalloc_uaf_16+0x1d6/0x4c0 [ 23.383559] kunit_try_run_case+0x1a5/0x480 [ 23.383740] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 23.383983] kthread+0x337/0x6f0 [ 23.384179] ret_from_fork+0x116/0x1d0 [ 23.384409] ret_from_fork_asm+0x1a/0x30 [ 23.384554] [ 23.384639] The buggy address belongs to the object at ffff88810598a240 [ 23.384639] which belongs to the cache kmalloc-16 of size 16 [ 23.385276] The buggy address is located 0 bytes inside of [ 23.385276] freed 16-byte region [ffff88810598a240, ffff88810598a250) [ 23.385636] [ 23.385704] The buggy address belongs to the physical page: [ 23.385937] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10598a [ 23.386293] flags: 0x200000000000000(node=0|zone=2) [ 23.386557] page_type: f5(slab) [ 23.386674] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 23.387359] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 23.387659] page dumped because: kasan: bad access detected [ 23.387823] [ 23.387885] Memory state around the buggy address: [ 23.388077] ffff88810598a100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 23.388529] ffff88810598a180: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 23.388746] >ffff88810598a200: fa fb fc fc 00 00 fc fc fa fb fc fc fc fc fc fc [ 23.389266] ^ [ 23.389433] ffff88810598a280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.389672] ffff88810598a300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.390150] ==================================================================