Date
July 8, 2025, 7:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.459239] ================================================================== [ 19.459301] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 19.459746] Read of size 1 at addr fff00000c564f380 by task kunit_try_catch/192 [ 19.459865] [ 19.460010] CPU: 1 UID: 0 PID: 192 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.460118] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.460497] Hardware name: linux,dummy-virt (DT) [ 19.460553] Call trace: [ 19.460623] show_stack+0x20/0x38 (C) [ 19.460765] dump_stack_lvl+0x8c/0xd0 [ 19.460835] print_report+0x118/0x608 [ 19.461021] kasan_report+0xdc/0x128 [ 19.461399] __kasan_check_byte+0x54/0x70 [ 19.461467] kfree_sensitive+0x30/0xb0 [ 19.461922] kmalloc_double_kzfree+0x168/0x308 [ 19.462197] kunit_try_run_case+0x170/0x3f0 [ 19.462367] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.462479] kthread+0x328/0x630 [ 19.462722] ret_from_fork+0x10/0x20 [ 19.462928] [ 19.462995] Allocated by task 192: [ 19.463037] kasan_save_stack+0x3c/0x68 [ 19.463287] kasan_save_track+0x20/0x40 [ 19.463511] kasan_save_alloc_info+0x40/0x58 [ 19.463609] __kasan_kmalloc+0xd4/0xd8 [ 19.463645] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.463685] kmalloc_double_kzfree+0xb8/0x308 [ 19.463985] kunit_try_run_case+0x170/0x3f0 [ 19.464145] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.464216] kthread+0x328/0x630 [ 19.464468] ret_from_fork+0x10/0x20 [ 19.464674] [ 19.464749] Freed by task 192: [ 19.464853] kasan_save_stack+0x3c/0x68 [ 19.464914] kasan_save_track+0x20/0x40 [ 19.465122] kasan_save_free_info+0x4c/0x78 [ 19.465183] __kasan_slab_free+0x6c/0x98 [ 19.465224] kfree+0x214/0x3c8 [ 19.465256] kfree_sensitive+0x80/0xb0 [ 19.465305] kmalloc_double_kzfree+0x11c/0x308 [ 19.465375] kunit_try_run_case+0x170/0x3f0 [ 19.465412] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.465465] kthread+0x328/0x630 [ 19.465501] ret_from_fork+0x10/0x20 [ 19.465538] [ 19.465557] The buggy address belongs to the object at fff00000c564f380 [ 19.465557] which belongs to the cache kmalloc-16 of size 16 [ 19.465630] The buggy address is located 0 bytes inside of [ 19.465630] freed 16-byte region [fff00000c564f380, fff00000c564f390) [ 19.465691] [ 19.465727] The buggy address belongs to the physical page: [ 19.465772] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10564f [ 19.465823] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.465872] page_type: f5(slab) [ 19.465910] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.465960] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.466010] page dumped because: kasan: bad access detected [ 19.466052] [ 19.466086] Memory state around the buggy address: [ 19.466134] fff00000c564f280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.466175] fff00000c564f300: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.466218] >fff00000c564f380: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.466256] ^ [ 19.466288] fff00000c564f400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.466340] fff00000c564f480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.466385] ==================================================================
[ 13.268366] ================================================================== [ 13.269122] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 13.269717] Read of size 1 at addr ffff8881022baca0 by task kunit_try_catch/209 [ 13.270385] [ 13.270520] CPU: 0 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 13.270745] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.270826] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.270851] Call Trace: [ 13.270864] <TASK> [ 13.270883] dump_stack_lvl+0x73/0xb0 [ 13.270916] print_report+0xd1/0x650 [ 13.270939] ? __virt_addr_valid+0x1db/0x2d0 [ 13.270964] ? kmalloc_double_kzfree+0x19c/0x350 [ 13.270986] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.271010] ? kmalloc_double_kzfree+0x19c/0x350 [ 13.271032] kasan_report+0x141/0x180 [ 13.271088] ? kmalloc_double_kzfree+0x19c/0x350 [ 13.271114] ? kmalloc_double_kzfree+0x19c/0x350 [ 13.271135] __kasan_check_byte+0x3d/0x50 [ 13.271156] kfree_sensitive+0x22/0x90 [ 13.271178] kmalloc_double_kzfree+0x19c/0x350 [ 13.271200] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 13.271221] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 13.271245] ? trace_hardirqs_on+0x37/0xe0 [ 13.271267] ? __pfx_read_tsc+0x10/0x10 [ 13.271288] ? ktime_get_ts64+0x86/0x230 [ 13.271313] kunit_try_run_case+0x1a5/0x480 [ 13.271338] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.271360] ? queued_spin_lock_slowpath+0x116/0xb40 [ 13.271384] ? __kthread_parkme+0x82/0x180 [ 13.271405] ? preempt_count_sub+0x50/0x80 [ 13.271429] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.271451] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.271473] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.271494] kthread+0x337/0x6f0 [ 13.271512] ? trace_preempt_on+0x20/0xc0 [ 13.271532] ? __pfx_kthread+0x10/0x10 [ 13.271552] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.271571] ? calculate_sigpending+0x7b/0xa0 [ 13.271595] ? __pfx_kthread+0x10/0x10 [ 13.271615] ret_from_fork+0x116/0x1d0 [ 13.271632] ? __pfx_kthread+0x10/0x10 [ 13.271652] ret_from_fork_asm+0x1a/0x30 [ 13.271684] </TASK> [ 13.271695] [ 13.285120] Allocated by task 209: [ 13.285255] kasan_save_stack+0x45/0x70 [ 13.285402] kasan_save_track+0x18/0x40 [ 13.285538] kasan_save_alloc_info+0x3b/0x50 [ 13.285708] __kasan_kmalloc+0xb7/0xc0 [ 13.285838] __kmalloc_cache_noprof+0x189/0x420 [ 13.286056] kmalloc_double_kzfree+0xa9/0x350 [ 13.286483] kunit_try_run_case+0x1a5/0x480 [ 13.286969] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.287463] kthread+0x337/0x6f0 [ 13.287798] ret_from_fork+0x116/0x1d0 [ 13.288147] ret_from_fork_asm+0x1a/0x30 [ 13.288540] [ 13.288683] Freed by task 209: [ 13.288982] kasan_save_stack+0x45/0x70 [ 13.289225] kasan_save_track+0x18/0x40 [ 13.289377] kasan_save_free_info+0x3f/0x60 [ 13.289858] __kasan_slab_free+0x56/0x70 [ 13.290290] kfree+0x222/0x3f0 [ 13.290458] kfree_sensitive+0x67/0x90 [ 13.290609] kmalloc_double_kzfree+0x12b/0x350 [ 13.291101] kunit_try_run_case+0x1a5/0x480 [ 13.291584] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.292175] kthread+0x337/0x6f0 [ 13.292478] ret_from_fork+0x116/0x1d0 [ 13.292638] ret_from_fork_asm+0x1a/0x30 [ 13.292855] [ 13.293012] The buggy address belongs to the object at ffff8881022baca0 [ 13.293012] which belongs to the cache kmalloc-16 of size 16 [ 13.294153] The buggy address is located 0 bytes inside of [ 13.294153] freed 16-byte region [ffff8881022baca0, ffff8881022bacb0) [ 13.294754] [ 13.294916] The buggy address belongs to the physical page: [ 13.295215] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1022ba [ 13.295750] flags: 0x200000000000000(node=0|zone=2) [ 13.296301] page_type: f5(slab) [ 13.296669] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 13.297415] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 13.297693] page dumped because: kasan: bad access detected [ 13.298289] [ 13.298504] Memory state around the buggy address: [ 13.299019] ffff8881022bab80: 00 04 fc fc 00 04 fc fc 00 01 fc fc 00 01 fc fc [ 13.299559] ffff8881022bac00: 00 04 fc fc 00 04 fc fc fa fb fc fc fa fb fc fc [ 13.299768] >ffff8881022bac80: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 13.299970] ^ [ 13.300145] ffff8881022bad00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.300526] ffff8881022bad80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.300818] ==================================================================