Date
July 3, 2025, 6:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.962932] ================================================================== [ 16.963001] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 16.963062] Read of size 1 at addr fff00000c78c38a8 by task kunit_try_catch/188 [ 16.963110] [ 16.963498] CPU: 0 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 16.963651] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.963690] Hardware name: linux,dummy-virt (DT) [ 16.963723] Call trace: [ 16.963744] show_stack+0x20/0x38 (C) [ 16.963794] dump_stack_lvl+0x8c/0xd0 [ 16.963839] print_report+0x118/0x608 [ 16.963883] kasan_report+0xdc/0x128 [ 16.963938] __asan_report_load1_noabort+0x20/0x30 [ 16.963989] kmalloc_uaf2+0x3f4/0x468 [ 16.964043] kunit_try_run_case+0x170/0x3f0 [ 16.964090] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.964141] kthread+0x328/0x630 [ 16.964183] ret_from_fork+0x10/0x20 [ 16.964228] [ 16.964254] Allocated by task 188: [ 16.964282] kasan_save_stack+0x3c/0x68 [ 16.964319] kasan_save_track+0x20/0x40 [ 16.964356] kasan_save_alloc_info+0x40/0x58 [ 16.964393] __kasan_kmalloc+0xd4/0xd8 [ 16.964438] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.964487] kmalloc_uaf2+0xc4/0x468 [ 16.964771] kunit_try_run_case+0x170/0x3f0 [ 16.965052] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.965236] kthread+0x328/0x630 [ 16.965382] ret_from_fork+0x10/0x20 [ 16.965454] [ 16.965599] Freed by task 188: [ 16.965747] kasan_save_stack+0x3c/0x68 [ 16.965919] kasan_save_track+0x20/0x40 [ 16.965964] kasan_save_free_info+0x4c/0x78 [ 16.966048] __kasan_slab_free+0x6c/0x98 [ 16.966279] kfree+0x214/0x3c8 [ 16.966502] kmalloc_uaf2+0x134/0x468 [ 16.966628] kunit_try_run_case+0x170/0x3f0 [ 16.966736] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.966866] kthread+0x328/0x630 [ 16.966901] ret_from_fork+0x10/0x20 [ 16.967094] [ 16.967178] The buggy address belongs to the object at fff00000c78c3880 [ 16.967178] which belongs to the cache kmalloc-64 of size 64 [ 16.967462] The buggy address is located 40 bytes inside of [ 16.967462] freed 64-byte region [fff00000c78c3880, fff00000c78c38c0) [ 16.967741] [ 16.967953] The buggy address belongs to the physical page: [ 16.968074] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1078c3 [ 16.968179] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.968255] page_type: f5(slab) [ 16.968433] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 16.968665] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 16.968725] page dumped because: kasan: bad access detected [ 16.968903] [ 16.968965] Memory state around the buggy address: [ 16.969180] fff00000c78c3780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.969297] fff00000c78c3800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.969471] >fff00000c78c3880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.969548] ^ [ 16.969677] fff00000c78c3900: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 16.969912] fff00000c78c3980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.970089] ==================================================================
[ 11.775490] ================================================================== [ 11.775916] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 11.776289] Read of size 1 at addr ffff8881038d51a8 by task kunit_try_catch/206 [ 11.776633] [ 11.776745] CPU: 0 UID: 0 PID: 206 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.776792] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.776804] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.776824] Call Trace: [ 11.776836] <TASK> [ 11.776854] dump_stack_lvl+0x73/0xb0 [ 11.776881] print_report+0xd1/0x650 [ 11.776904] ? __virt_addr_valid+0x1db/0x2d0 [ 11.776927] ? kmalloc_uaf2+0x4a8/0x520 [ 11.776946] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.776968] ? kmalloc_uaf2+0x4a8/0x520 [ 11.776987] kasan_report+0x141/0x180 [ 11.777008] ? kmalloc_uaf2+0x4a8/0x520 [ 11.777032] __asan_report_load1_noabort+0x18/0x20 [ 11.777055] kmalloc_uaf2+0x4a8/0x520 [ 11.777075] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 11.777093] ? finish_task_switch.isra.0+0x153/0x700 [ 11.777125] ? __switch_to+0x47/0xf50 [ 11.777152] ? __schedule+0x10cc/0x2b60 [ 11.777173] ? __pfx_read_tsc+0x10/0x10 [ 11.777193] ? ktime_get_ts64+0x86/0x230 [ 11.777217] kunit_try_run_case+0x1a5/0x480 [ 11.777240] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.777261] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.777284] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.777306] ? __kthread_parkme+0x82/0x180 [ 11.777325] ? preempt_count_sub+0x50/0x80 [ 11.777358] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.777381] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.777403] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.777425] kthread+0x337/0x6f0 [ 11.777444] ? trace_preempt_on+0x20/0xc0 [ 11.777468] ? __pfx_kthread+0x10/0x10 [ 11.777488] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.777508] ? calculate_sigpending+0x7b/0xa0 [ 11.777531] ? __pfx_kthread+0x10/0x10 [ 11.777551] ret_from_fork+0x116/0x1d0 [ 11.777569] ? __pfx_kthread+0x10/0x10 [ 11.777588] ret_from_fork_asm+0x1a/0x30 [ 11.777631] </TASK> [ 11.777643] [ 11.784891] Allocated by task 206: [ 11.785078] kasan_save_stack+0x45/0x70 [ 11.785366] kasan_save_track+0x18/0x40 [ 11.785572] kasan_save_alloc_info+0x3b/0x50 [ 11.785828] __kasan_kmalloc+0xb7/0xc0 [ 11.786028] __kmalloc_cache_noprof+0x189/0x420 [ 11.786450] kmalloc_uaf2+0xc6/0x520 [ 11.786643] kunit_try_run_case+0x1a5/0x480 [ 11.786827] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.787035] kthread+0x337/0x6f0 [ 11.787215] ret_from_fork+0x116/0x1d0 [ 11.787428] ret_from_fork_asm+0x1a/0x30 [ 11.787573] [ 11.787645] Freed by task 206: [ 11.787758] kasan_save_stack+0x45/0x70 [ 11.788060] kasan_save_track+0x18/0x40 [ 11.788285] kasan_save_free_info+0x3f/0x60 [ 11.788538] __kasan_slab_free+0x56/0x70 [ 11.788729] kfree+0x222/0x3f0 [ 11.789000] kmalloc_uaf2+0x14c/0x520 [ 11.789348] kunit_try_run_case+0x1a5/0x480 [ 11.789539] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.789781] kthread+0x337/0x6f0 [ 11.789916] ret_from_fork+0x116/0x1d0 [ 11.790100] ret_from_fork_asm+0x1a/0x30 [ 11.790407] [ 11.790506] The buggy address belongs to the object at ffff8881038d5180 [ 11.790506] which belongs to the cache kmalloc-64 of size 64 [ 11.790888] The buggy address is located 40 bytes inside of [ 11.790888] freed 64-byte region [ffff8881038d5180, ffff8881038d51c0) [ 11.791482] [ 11.791584] The buggy address belongs to the physical page: [ 11.791825] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1038d5 [ 11.792071] flags: 0x200000000000000(node=0|zone=2) [ 11.792253] page_type: f5(slab) [ 11.792397] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.792739] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.793125] page dumped because: kasan: bad access detected [ 11.793470] [ 11.793566] Memory state around the buggy address: [ 11.793768] ffff8881038d5080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.794026] ffff8881038d5100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.794260] >ffff8881038d5180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.794766] ^ [ 11.794986] ffff8881038d5200: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 11.795271] ffff8881038d5280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.795685] ==================================================================