Date
June 25, 2025, 8:08 a.m.
Environment | |
---|---|
qemu-arm64 | |
qemu-x86_64 |
[ 26.811743] ================================================================== [ 26.811814] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 26.812051] Read of size 1 at addr fff00000c78b0ea8 by task kunit_try_catch/200 [ 26.813018] [ 26.813062] CPU: 1 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250625 #1 PREEMPT [ 26.813158] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.813358] Hardware name: linux,dummy-virt (DT) [ 26.813590] Call trace: [ 26.814332] show_stack+0x20/0x38 (C) [ 26.814429] dump_stack_lvl+0x8c/0xd0 [ 26.814746] print_report+0x118/0x608 [ 26.814882] kasan_report+0xdc/0x128 [ 26.815011] __asan_report_load1_noabort+0x20/0x30 [ 26.815596] kmalloc_uaf2+0x3f4/0x468 [ 26.815835] kunit_try_run_case+0x170/0x3f0 [ 26.815956] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 26.816135] kthread+0x328/0x630 [ 26.816340] ret_from_fork+0x10/0x20 [ 26.816474] [ 26.816494] Allocated by task 200: [ 26.816534] kasan_save_stack+0x3c/0x68 [ 26.816575] kasan_save_track+0x20/0x40 [ 26.816613] kasan_save_alloc_info+0x40/0x58 [ 26.816651] __kasan_kmalloc+0xd4/0xd8 [ 26.816688] __kmalloc_cache_noprof+0x16c/0x3c0 [ 26.816729] kmalloc_uaf2+0xc4/0x468 [ 26.816797] kunit_try_run_case+0x170/0x3f0 [ 26.816840] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 26.816885] kthread+0x328/0x630 [ 26.816917] ret_from_fork+0x10/0x20 [ 26.816963] [ 26.816997] Freed by task 200: [ 26.817031] kasan_save_stack+0x3c/0x68 [ 26.817078] kasan_save_track+0x20/0x40 [ 26.817116] kasan_save_free_info+0x4c/0x78 [ 26.817150] __kasan_slab_free+0x6c/0x98 [ 26.817188] kfree+0x214/0x3c8 [ 26.817219] kmalloc_uaf2+0x134/0x468 [ 26.817264] kunit_try_run_case+0x170/0x3f0 [ 26.817315] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 26.817359] kthread+0x328/0x630 [ 26.817785] ret_from_fork+0x10/0x20 [ 26.817840] [ 26.817890] The buggy address belongs to the object at fff00000c78b0e80 [ 26.817890] which belongs to the cache kmalloc-64 of size 64 [ 26.818477] The buggy address is located 40 bytes inside of [ 26.818477] freed 64-byte region [fff00000c78b0e80, fff00000c78b0ec0) [ 26.818630] [ 26.818817] The buggy address belongs to the physical page: [ 26.819003] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1078b0 [ 26.819287] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 26.819728] page_type: f5(slab) [ 26.820034] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 26.820433] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 26.820561] page dumped because: kasan: bad access detected [ 26.820660] [ 26.820679] Memory state around the buggy address: [ 26.820885] fff00000c78b0d80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.821139] fff00000c78b0e00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.821503] >fff00000c78b0e80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.821575] ^ [ 26.821719] fff00000c78b0f00: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 26.821767] fff00000c78b0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.821996] ==================================================================
[ 22.178916] ================================================================== [ 22.180319] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 22.180770] Read of size 1 at addr ffff888102590028 by task kunit_try_catch/217 [ 22.181366] [ 22.181595] CPU: 0 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250625 #1 PREEMPT(voluntary) [ 22.181650] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.181663] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.181685] Call Trace: [ 22.181700] <TASK> [ 22.181721] dump_stack_lvl+0x73/0xb0 [ 22.181775] print_report+0xd1/0x650 [ 22.181803] ? __virt_addr_valid+0x1db/0x2d0 [ 22.181827] ? kmalloc_uaf2+0x4a8/0x520 [ 22.181845] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.181869] ? kmalloc_uaf2+0x4a8/0x520 [ 22.181887] kasan_report+0x141/0x180 [ 22.181907] ? kmalloc_uaf2+0x4a8/0x520 [ 22.181929] __asan_report_load1_noabort+0x18/0x20 [ 22.181960] kmalloc_uaf2+0x4a8/0x520 [ 22.181979] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 22.182065] ? finish_task_switch.isra.0+0x153/0x700 [ 22.182094] ? __switch_to+0x47/0xf50 [ 22.182129] ? __schedule+0x10cc/0x2b60 [ 22.182155] ? __pfx_read_tsc+0x10/0x10 [ 22.182176] ? ktime_get_ts64+0x86/0x230 [ 22.182201] kunit_try_run_case+0x1a5/0x480 [ 22.182227] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.182249] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.182269] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.182292] ? __kthread_parkme+0x82/0x180 [ 22.182311] ? preempt_count_sub+0x50/0x80 [ 22.182332] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.182354] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.182376] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.182398] kthread+0x337/0x6f0 [ 22.182416] ? trace_preempt_on+0x20/0xc0 [ 22.182439] ? __pfx_kthread+0x10/0x10 [ 22.182458] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.182480] ? calculate_sigpending+0x7b/0xa0 [ 22.182503] ? __pfx_kthread+0x10/0x10 [ 22.182523] ret_from_fork+0x116/0x1d0 [ 22.182540] ? __pfx_kthread+0x10/0x10 [ 22.182558] ret_from_fork_asm+0x1a/0x30 [ 22.182588] </TASK> [ 22.182600] [ 22.195018] Allocated by task 217: [ 22.195395] kasan_save_stack+0x45/0x70 [ 22.195754] kasan_save_track+0x18/0x40 [ 22.196204] kasan_save_alloc_info+0x3b/0x50 [ 22.196457] __kasan_kmalloc+0xb7/0xc0 [ 22.196577] __kmalloc_cache_noprof+0x189/0x420 [ 22.196720] kmalloc_uaf2+0xc6/0x520 [ 22.196906] kunit_try_run_case+0x1a5/0x480 [ 22.197289] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.197892] kthread+0x337/0x6f0 [ 22.198213] ret_from_fork+0x116/0x1d0 [ 22.198570] ret_from_fork_asm+0x1a/0x30 [ 22.199033] [ 22.199194] Freed by task 217: [ 22.199517] kasan_save_stack+0x45/0x70 [ 22.199711] kasan_save_track+0x18/0x40 [ 22.199905] kasan_save_free_info+0x3f/0x60 [ 22.200306] __kasan_slab_free+0x56/0x70 [ 22.200679] kfree+0x222/0x3f0 [ 22.201040] kmalloc_uaf2+0x14c/0x520 [ 22.201260] kunit_try_run_case+0x1a5/0x480 [ 22.201606] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.201764] kthread+0x337/0x6f0 [ 22.201929] ret_from_fork+0x116/0x1d0 [ 22.202315] ret_from_fork_asm+0x1a/0x30 [ 22.202664] [ 22.202827] The buggy address belongs to the object at ffff888102590000 [ 22.202827] which belongs to the cache kmalloc-64 of size 64 [ 22.203991] The buggy address is located 40 bytes inside of [ 22.203991] freed 64-byte region [ffff888102590000, ffff888102590040) [ 22.204707] [ 22.204864] The buggy address belongs to the physical page: [ 22.205431] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102590 [ 22.205851] flags: 0x200000000000000(node=0|zone=2) [ 22.206378] page_type: f5(slab) [ 22.206647] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 22.207060] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 22.207661] page dumped because: kasan: bad access detected [ 22.207866] [ 22.208034] Memory state around the buggy address: [ 22.208466] ffff88810258ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.209150] ffff88810258ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.209354] >ffff888102590000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 22.209547] ^ [ 22.209682] ffff888102590080: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 22.209877] ffff888102590100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.210458] ==================================================================