Date
July 3, 2025, 11:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.916981] ================================================================== [ 19.917375] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 19.917686] Read of size 1 at addr fff00000c6191560 by task kunit_try_catch/192 [ 19.918160] [ 19.918260] CPU: 0 UID: 0 PID: 192 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.918563] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.918622] Hardware name: linux,dummy-virt (DT) [ 19.918693] Call trace: [ 19.918908] show_stack+0x20/0x38 (C) [ 19.919103] dump_stack_lvl+0x8c/0xd0 [ 19.919264] print_report+0x118/0x608 [ 19.919412] kasan_report+0xdc/0x128 [ 19.919527] __kasan_check_byte+0x54/0x70 [ 19.919624] kfree_sensitive+0x30/0xb0 [ 19.919731] kmalloc_double_kzfree+0x168/0x308 [ 19.919862] kunit_try_run_case+0x170/0x3f0 [ 19.919974] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.920095] kthread+0x328/0x630 [ 19.920182] ret_from_fork+0x10/0x20 [ 19.920643] [ 19.920695] Allocated by task 192: [ 19.920763] kasan_save_stack+0x3c/0x68 [ 19.920855] kasan_save_track+0x20/0x40 [ 19.920930] kasan_save_alloc_info+0x40/0x58 [ 19.921283] __kasan_kmalloc+0xd4/0xd8 [ 19.921408] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.921497] kmalloc_double_kzfree+0xb8/0x308 [ 19.921605] kunit_try_run_case+0x170/0x3f0 [ 19.921785] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.921905] kthread+0x328/0x630 [ 19.922084] ret_from_fork+0x10/0x20 [ 19.922195] [ 19.922731] Freed by task 192: [ 19.922831] kasan_save_stack+0x3c/0x68 [ 19.922931] kasan_save_track+0x20/0x40 [ 19.923015] kasan_save_free_info+0x4c/0x78 [ 19.923119] __kasan_slab_free+0x6c/0x98 [ 19.923203] kfree+0x214/0x3c8 [ 19.923270] kfree_sensitive+0x80/0xb0 [ 19.923350] kmalloc_double_kzfree+0x11c/0x308 [ 19.923436] kunit_try_run_case+0x170/0x3f0 [ 19.923522] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.924761] kthread+0x328/0x630 [ 19.925443] ret_from_fork+0x10/0x20 [ 19.925768] [ 19.925834] The buggy address belongs to the object at fff00000c6191560 [ 19.925834] which belongs to the cache kmalloc-16 of size 16 [ 19.926010] The buggy address is located 0 bytes inside of [ 19.926010] freed 16-byte region [fff00000c6191560, fff00000c6191570) [ 19.926274] [ 19.926346] The buggy address belongs to the physical page: [ 19.926456] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106191 [ 19.926642] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.926744] page_type: f5(slab) [ 19.926818] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.926935] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.927019] page dumped because: kasan: bad access detected [ 19.927111] [ 19.927155] Memory state around the buggy address: [ 19.927237] fff00000c6191400: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.927338] fff00000c6191480: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.927424] >fff00000c6191500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.927494] ^ [ 19.927575] fff00000c6191580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.927687] fff00000c6191600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.927809] ==================================================================
[ 11.902191] ================================================================== [ 11.902847] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 11.903790] Read of size 1 at addr ffff8881023854c0 by task kunit_try_catch/209 [ 11.904232] [ 11.904337] CPU: 0 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.904586] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.904600] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.904622] Call Trace: [ 11.904635] <TASK> [ 11.904651] dump_stack_lvl+0x73/0xb0 [ 11.904679] print_report+0xd1/0x650 [ 11.904701] ? __virt_addr_valid+0x1db/0x2d0 [ 11.904723] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.904744] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.904764] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.904787] kasan_report+0x141/0x180 [ 11.904807] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.904832] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.904853] __kasan_check_byte+0x3d/0x50 [ 11.904874] kfree_sensitive+0x22/0x90 [ 11.904897] kmalloc_double_kzfree+0x19c/0x350 [ 11.904918] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 11.904941] ? __schedule+0x10cc/0x2b60 [ 11.904962] ? __pfx_read_tsc+0x10/0x10 [ 11.904981] ? ktime_get_ts64+0x86/0x230 [ 11.905006] kunit_try_run_case+0x1a5/0x480 [ 11.905031] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.905053] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.905075] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.905096] ? __kthread_parkme+0x82/0x180 [ 11.905116] ? preempt_count_sub+0x50/0x80 [ 11.905155] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.905177] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.905198] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.905220] kthread+0x337/0x6f0 [ 11.905238] ? trace_preempt_on+0x20/0xc0 [ 11.905259] ? __pfx_kthread+0x10/0x10 [ 11.905279] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.905298] ? calculate_sigpending+0x7b/0xa0 [ 11.905376] ? __pfx_kthread+0x10/0x10 [ 11.905397] ret_from_fork+0x116/0x1d0 [ 11.905414] ? __pfx_kthread+0x10/0x10 [ 11.905434] ret_from_fork_asm+0x1a/0x30 [ 11.905464] </TASK> [ 11.905476] [ 11.915811] Allocated by task 209: [ 11.915970] kasan_save_stack+0x45/0x70 [ 11.916292] kasan_save_track+0x18/0x40 [ 11.916648] kasan_save_alloc_info+0x3b/0x50 [ 11.916983] __kasan_kmalloc+0xb7/0xc0 [ 11.917414] __kmalloc_cache_noprof+0x189/0x420 [ 11.917710] kmalloc_double_kzfree+0xa9/0x350 [ 11.917866] kunit_try_run_case+0x1a5/0x480 [ 11.918013] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.918219] kthread+0x337/0x6f0 [ 11.918499] ret_from_fork+0x116/0x1d0 [ 11.918973] ret_from_fork_asm+0x1a/0x30 [ 11.919134] [ 11.919231] Freed by task 209: [ 11.919742] kasan_save_stack+0x45/0x70 [ 11.919929] kasan_save_track+0x18/0x40 [ 11.920256] kasan_save_free_info+0x3f/0x60 [ 11.920561] __kasan_slab_free+0x56/0x70 [ 11.920886] kfree+0x222/0x3f0 [ 11.921141] kfree_sensitive+0x67/0x90 [ 11.921428] kmalloc_double_kzfree+0x12b/0x350 [ 11.921805] kunit_try_run_case+0x1a5/0x480 [ 11.922009] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.922457] kthread+0x337/0x6f0 [ 11.922645] ret_from_fork+0x116/0x1d0 [ 11.922838] ret_from_fork_asm+0x1a/0x30 [ 11.923346] [ 11.923452] The buggy address belongs to the object at ffff8881023854c0 [ 11.923452] which belongs to the cache kmalloc-16 of size 16 [ 11.924034] The buggy address is located 0 bytes inside of [ 11.924034] freed 16-byte region [ffff8881023854c0, ffff8881023854d0) [ 11.924909] [ 11.924992] The buggy address belongs to the physical page: [ 11.925592] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102385 [ 11.925935] flags: 0x200000000000000(node=0|zone=2) [ 11.926527] page_type: f5(slab) [ 11.926787] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.927226] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.927777] page dumped because: kasan: bad access detected [ 11.928014] [ 11.928098] Memory state around the buggy address: [ 11.928613] ffff888102385380: 00 06 fc fc 00 06 fc fc fa fb fc fc fa fb fc fc [ 11.929103] ffff888102385400: 00 00 fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc [ 11.929670] >ffff888102385480: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 11.930075] ^ [ 11.930528] ffff888102385500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.930927] ffff888102385580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.931456] ==================================================================