Date
July 5, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.228577] ================================================================== [ 19.229225] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 19.229759] Read of size 1 at addr fff00000c56728e0 by task kunit_try_catch/193 [ 19.229892] [ 19.229981] CPU: 0 UID: 0 PID: 193 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.230237] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.230722] Hardware name: linux,dummy-virt (DT) [ 19.230804] Call trace: [ 19.230970] show_stack+0x20/0x38 (C) [ 19.231174] dump_stack_lvl+0x8c/0xd0 [ 19.231287] print_report+0x118/0x608 [ 19.231422] kasan_report+0xdc/0x128 [ 19.231937] __kasan_check_byte+0x54/0x70 [ 19.232121] kfree_sensitive+0x30/0xb0 [ 19.232657] kmalloc_double_kzfree+0x168/0x308 [ 19.232864] kunit_try_run_case+0x170/0x3f0 [ 19.233056] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.233267] kthread+0x328/0x630 [ 19.233380] ret_from_fork+0x10/0x20 [ 19.233859] [ 19.233921] Allocated by task 193: [ 19.233999] kasan_save_stack+0x3c/0x68 [ 19.234142] kasan_save_track+0x20/0x40 [ 19.234232] kasan_save_alloc_info+0x40/0x58 [ 19.234413] __kasan_kmalloc+0xd4/0xd8 [ 19.234748] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.234860] kmalloc_double_kzfree+0xb8/0x308 [ 19.234950] kunit_try_run_case+0x170/0x3f0 [ 19.235380] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.235581] kthread+0x328/0x630 [ 19.235664] ret_from_fork+0x10/0x20 [ 19.235834] [ 19.235903] Freed by task 193: [ 19.235971] kasan_save_stack+0x3c/0x68 [ 19.236469] kasan_save_track+0x20/0x40 [ 19.236585] kasan_save_free_info+0x4c/0x78 [ 19.236682] __kasan_slab_free+0x6c/0x98 [ 19.236814] kfree+0x214/0x3c8 [ 19.236894] kfree_sensitive+0x80/0xb0 [ 19.237405] kmalloc_double_kzfree+0x11c/0x308 [ 19.237528] kunit_try_run_case+0x170/0x3f0 [ 19.237703] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.237819] kthread+0x328/0x630 [ 19.237961] ret_from_fork+0x10/0x20 [ 19.238044] [ 19.238276] The buggy address belongs to the object at fff00000c56728e0 [ 19.238276] which belongs to the cache kmalloc-16 of size 16 [ 19.238422] The buggy address is located 0 bytes inside of [ 19.238422] freed 16-byte region [fff00000c56728e0, fff00000c56728f0) [ 19.238563] [ 19.238612] The buggy address belongs to the physical page: [ 19.239067] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105672 [ 19.239217] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.239726] page_type: f5(slab) [ 19.240134] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.240316] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.240426] page dumped because: kasan: bad access detected [ 19.240500] [ 19.240942] Memory state around the buggy address: [ 19.241044] fff00000c5672780: 00 03 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.241233] fff00000c5672800: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.241365] >fff00000c5672880: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.241455] ^ [ 19.241542] fff00000c5672900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.242078] fff00000c5672980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.242297] ==================================================================
[ 13.995320] ================================================================== [ 13.996359] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 13.997157] Read of size 1 at addr ffff8881018868c0 by task kunit_try_catch/209 [ 13.997516] [ 13.997675] CPU: 1 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.997746] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.997762] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.997803] Call Trace: [ 13.997818] <TASK> [ 13.997852] dump_stack_lvl+0x73/0xb0 [ 13.997888] print_report+0xd1/0x650 [ 13.997914] ? __virt_addr_valid+0x1db/0x2d0 [ 13.998000] ? kmalloc_double_kzfree+0x19c/0x350 [ 13.998027] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.998053] ? kmalloc_double_kzfree+0x19c/0x350 [ 13.998096] kasan_report+0x141/0x180 [ 13.998122] ? kmalloc_double_kzfree+0x19c/0x350 [ 13.998166] ? kmalloc_double_kzfree+0x19c/0x350 [ 13.998193] __kasan_check_byte+0x3d/0x50 [ 13.998219] kfree_sensitive+0x22/0x90 [ 13.998259] kmalloc_double_kzfree+0x19c/0x350 [ 13.998286] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 13.998327] ? __schedule+0x10cc/0x2b60 [ 13.998353] ? __pfx_read_tsc+0x10/0x10 [ 13.998379] ? ktime_get_ts64+0x86/0x230 [ 13.998428] kunit_try_run_case+0x1a5/0x480 [ 13.998458] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.998496] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.998524] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.998550] ? __kthread_parkme+0x82/0x180 [ 13.998574] ? preempt_count_sub+0x50/0x80 [ 13.998602] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.998629] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.998666] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.998693] kthread+0x337/0x6f0 [ 13.998719] ? trace_preempt_on+0x20/0xc0 [ 13.998749] ? __pfx_kthread+0x10/0x10 [ 13.998794] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.998833] ? calculate_sigpending+0x7b/0xa0 [ 13.998864] ? __pfx_kthread+0x10/0x10 [ 13.998889] ret_from_fork+0x116/0x1d0 [ 13.998912] ? __pfx_kthread+0x10/0x10 [ 13.998935] ret_from_fork_asm+0x1a/0x30 [ 13.998972] </TASK> [ 13.998987] [ 14.012332] Allocated by task 209: [ 14.012573] kasan_save_stack+0x45/0x70 [ 14.012953] kasan_save_track+0x18/0x40 [ 14.013229] kasan_save_alloc_info+0x3b/0x50 [ 14.013509] __kasan_kmalloc+0xb7/0xc0 [ 14.013750] __kmalloc_cache_noprof+0x189/0x420 [ 14.014065] kmalloc_double_kzfree+0xa9/0x350 [ 14.014252] kunit_try_run_case+0x1a5/0x480 [ 14.014439] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.014662] kthread+0x337/0x6f0 [ 14.014926] ret_from_fork+0x116/0x1d0 [ 14.015220] ret_from_fork_asm+0x1a/0x30 [ 14.015797] [ 14.015996] Freed by task 209: [ 14.016139] kasan_save_stack+0x45/0x70 [ 14.016320] kasan_save_track+0x18/0x40 [ 14.016550] kasan_save_free_info+0x3f/0x60 [ 14.017242] __kasan_slab_free+0x56/0x70 [ 14.018108] kfree+0x222/0x3f0 [ 14.018338] kfree_sensitive+0x67/0x90 [ 14.018680] kmalloc_double_kzfree+0x12b/0x350 [ 14.018883] kunit_try_run_case+0x1a5/0x480 [ 14.019177] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.019964] kthread+0x337/0x6f0 [ 14.020183] ret_from_fork+0x116/0x1d0 [ 14.020731] ret_from_fork_asm+0x1a/0x30 [ 14.021307] [ 14.021419] The buggy address belongs to the object at ffff8881018868c0 [ 14.021419] which belongs to the cache kmalloc-16 of size 16 [ 14.022664] The buggy address is located 0 bytes inside of [ 14.022664] freed 16-byte region [ffff8881018868c0, ffff8881018868d0) [ 14.023694] [ 14.023936] The buggy address belongs to the physical page: [ 14.024591] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101886 [ 14.025210] flags: 0x200000000000000(node=0|zone=2) [ 14.025531] page_type: f5(slab) [ 14.025768] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 14.026217] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 14.026551] page dumped because: kasan: bad access detected [ 14.026855] [ 14.027121] Memory state around the buggy address: [ 14.027385] ffff888101886780: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 14.027768] ffff888101886800: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 14.028143] >ffff888101886880: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 14.028544] ^ [ 14.029232] ffff888101886900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.029542] ffff888101886980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.030183] ==================================================================