Date
June 18, 2025, 6:43 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.159769] ================================================================== [ 21.160036] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 21.160217] Read of size 1 at addr fff00000c6058168 by task kunit_try_catch/194 [ 21.160367] [ 21.160496] CPU: 0 UID: 0 PID: 194 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc2-next-20250618 #1 PREEMPT [ 21.160827] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 21.160908] Hardware name: linux,dummy-virt (DT) [ 21.160997] Call trace: [ 21.161064] show_stack+0x20/0x38 (C) [ 21.161181] dump_stack_lvl+0x8c/0xd0 [ 21.161294] print_report+0x118/0x608 [ 21.161419] kasan_report+0xdc/0x128 [ 21.161541] __asan_report_load1_noabort+0x20/0x30 [ 21.161650] kmalloc_uaf+0x300/0x338 [ 21.161752] kunit_try_run_case+0x170/0x3f0 [ 21.161866] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.162006] kthread+0x328/0x630 [ 21.162180] ret_from_fork+0x10/0x20 [ 21.162319] [ 21.162389] Allocated by task 194: [ 21.162526] kasan_save_stack+0x3c/0x68 [ 21.162667] kasan_save_track+0x20/0x40 [ 21.162794] kasan_save_alloc_info+0x40/0x58 [ 21.162893] __kasan_kmalloc+0xd4/0xd8 [ 21.162966] __kmalloc_cache_noprof+0x16c/0x3c0 [ 21.163055] kmalloc_uaf+0xb8/0x338 [ 21.163153] kunit_try_run_case+0x170/0x3f0 [ 21.163240] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.163328] kthread+0x328/0x630 [ 21.163397] ret_from_fork+0x10/0x20 [ 21.163484] [ 21.163528] Freed by task 194: [ 21.163590] kasan_save_stack+0x3c/0x68 [ 21.163677] kasan_save_track+0x20/0x40 [ 21.163782] kasan_save_free_info+0x4c/0x78 [ 21.163886] __kasan_slab_free+0x6c/0x98 [ 21.163989] kfree+0x214/0x3c8 [ 21.164129] kmalloc_uaf+0x11c/0x338 [ 21.164220] kunit_try_run_case+0x170/0x3f0 [ 21.164315] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.164415] kthread+0x328/0x630 [ 21.164497] ret_from_fork+0x10/0x20 [ 21.164595] [ 21.164651] The buggy address belongs to the object at fff00000c6058160 [ 21.164651] which belongs to the cache kmalloc-16 of size 16 [ 21.164785] The buggy address is located 8 bytes inside of [ 21.164785] freed 16-byte region [fff00000c6058160, fff00000c6058170) [ 21.164919] [ 21.164972] The buggy address belongs to the physical page: [ 21.165089] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106058 [ 21.165290] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.165457] page_type: f5(slab) [ 21.165549] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 21.165714] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 21.165861] page dumped because: kasan: bad access detected [ 21.165973] [ 21.166029] Memory state around the buggy address: [ 21.166142] fff00000c6058000: 00 00 fc fc 00 00 fc fc fa fb fc fc fa fb fc fc [ 21.166240] fff00000c6058080: fa fb fc fc 00 04 fc fc fa fb fc fc fa fb fc fc [ 21.166330] >fff00000c6058100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 21.166413] ^ [ 21.166502] fff00000c6058180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.166644] fff00000c6058200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.166895] ==================================================================
[ 11.376668] ================================================================== [ 11.377581] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 11.378140] Read of size 1 at addr ffff888102859688 by task kunit_try_catch/210 [ 11.378410] [ 11.378599] CPU: 1 UID: 0 PID: 210 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250618 #1 PREEMPT(voluntary) [ 11.378825] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.378842] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.378865] Call Trace: [ 11.378879] <TASK> [ 11.378910] dump_stack_lvl+0x73/0xb0 [ 11.378943] print_report+0xd1/0x650 [ 11.378975] ? __virt_addr_valid+0x1db/0x2d0 [ 11.378999] ? kmalloc_uaf+0x320/0x380 [ 11.379017] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.379041] ? kmalloc_uaf+0x320/0x380 [ 11.379059] kasan_report+0x141/0x180 [ 11.379079] ? kmalloc_uaf+0x320/0x380 [ 11.379102] __asan_report_load1_noabort+0x18/0x20 [ 11.379124] kmalloc_uaf+0x320/0x380 [ 11.379142] ? __pfx_kmalloc_uaf+0x10/0x10 [ 11.379161] ? __schedule+0x10cc/0x2b60 [ 11.379182] ? __pfx_read_tsc+0x10/0x10 [ 11.379215] ? ktime_get_ts64+0x86/0x230 [ 11.379240] kunit_try_run_case+0x1a5/0x480 [ 11.379264] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.379284] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.379306] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.379327] ? __kthread_parkme+0x82/0x180 [ 11.379347] ? preempt_count_sub+0x50/0x80 [ 11.379368] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.379390] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.379411] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.379432] kthread+0x337/0x6f0 [ 11.379450] ? trace_preempt_on+0x20/0xc0 [ 11.379473] ? __pfx_kthread+0x10/0x10 [ 11.379492] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.379511] ? calculate_sigpending+0x7b/0xa0 [ 11.379535] ? __pfx_kthread+0x10/0x10 [ 11.379555] ret_from_fork+0x116/0x1d0 [ 11.379573] ? __pfx_kthread+0x10/0x10 [ 11.379593] ret_from_fork_asm+0x1a/0x30 [ 11.379623] </TASK> [ 11.379634] [ 11.391972] Allocated by task 210: [ 11.392101] kasan_save_stack+0x45/0x70 [ 11.392352] kasan_save_track+0x18/0x40 [ 11.392895] kasan_save_alloc_info+0x3b/0x50 [ 11.393485] __kasan_kmalloc+0xb7/0xc0 [ 11.393873] __kmalloc_cache_noprof+0x189/0x420 [ 11.394029] kmalloc_uaf+0xaa/0x380 [ 11.394148] kunit_try_run_case+0x1a5/0x480 [ 11.394565] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.395102] kthread+0x337/0x6f0 [ 11.395342] ret_from_fork+0x116/0x1d0 [ 11.395603] ret_from_fork_asm+0x1a/0x30 [ 11.396025] [ 11.396193] Freed by task 210: [ 11.396545] kasan_save_stack+0x45/0x70 [ 11.397088] kasan_save_track+0x18/0x40 [ 11.397540] kasan_save_free_info+0x3f/0x60 [ 11.397950] __kasan_slab_free+0x56/0x70 [ 11.398407] kfree+0x222/0x3f0 [ 11.398736] kmalloc_uaf+0x12c/0x380 [ 11.399080] kunit_try_run_case+0x1a5/0x480 [ 11.399249] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.399793] kthread+0x337/0x6f0 [ 11.400105] ret_from_fork+0x116/0x1d0 [ 11.400403] ret_from_fork_asm+0x1a/0x30 [ 11.400885] [ 11.400960] The buggy address belongs to the object at ffff888102859680 [ 11.400960] which belongs to the cache kmalloc-16 of size 16 [ 11.401581] The buggy address is located 8 bytes inside of [ 11.401581] freed 16-byte region [ffff888102859680, ffff888102859690) [ 11.402700] [ 11.402859] The buggy address belongs to the physical page: [ 11.403355] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102859 [ 11.403958] flags: 0x200000000000000(node=0|zone=2) [ 11.404429] page_type: f5(slab) [ 11.404844] raw: 0200000000000000 ffff888100041640 dead000000000100 dead000000000122 [ 11.405078] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.405635] page dumped because: kasan: bad access detected [ 11.406311] [ 11.406563] Memory state around the buggy address: [ 11.407014] ffff888102859580: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.407580] ffff888102859600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.407795] >ffff888102859680: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.408003] ^ [ 11.408119] ffff888102859700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.408349] ffff888102859780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.408825] ==================================================================