Date
July 15, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.770137] ================================================================== [ 15.770214] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 15.770274] Read of size 1 at addr fff00000c591d600 by task kunit_try_catch/193 [ 15.770325] [ 15.770359] CPU: 1 UID: 0 PID: 193 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 15.770636] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.770904] Hardware name: linux,dummy-virt (DT) [ 15.771192] Call trace: [ 15.771265] show_stack+0x20/0x38 (C) [ 15.772024] dump_stack_lvl+0x8c/0xd0 [ 15.772167] print_report+0x118/0x5d0 [ 15.772344] kasan_report+0xdc/0x128 [ 15.772693] __kasan_check_byte+0x54/0x70 [ 15.773300] kfree_sensitive+0x30/0xb0 [ 15.773378] kmalloc_double_kzfree+0x168/0x308 [ 15.773428] kunit_try_run_case+0x170/0x3f0 [ 15.773565] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.773793] kthread+0x328/0x630 [ 15.773972] ret_from_fork+0x10/0x20 [ 15.774522] [ 15.774542] Allocated by task 193: [ 15.774998] kasan_save_stack+0x3c/0x68 [ 15.775313] kasan_save_track+0x20/0x40 [ 15.775354] kasan_save_alloc_info+0x40/0x58 [ 15.775397] __kasan_kmalloc+0xd4/0xd8 [ 15.775435] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.775961] kmalloc_double_kzfree+0xb8/0x308 [ 15.776263] kunit_try_run_case+0x170/0x3f0 [ 15.776539] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.776653] kthread+0x328/0x630 [ 15.776848] ret_from_fork+0x10/0x20 [ 15.776991] [ 15.777065] Freed by task 193: [ 15.777092] kasan_save_stack+0x3c/0x68 [ 15.777225] kasan_save_track+0x20/0x40 [ 15.777262] kasan_save_free_info+0x4c/0x78 [ 15.777305] __kasan_slab_free+0x6c/0x98 [ 15.777341] kfree+0x214/0x3c8 [ 15.777898] kfree_sensitive+0x80/0xb0 [ 15.777982] kmalloc_double_kzfree+0x11c/0x308 [ 15.778251] kunit_try_run_case+0x170/0x3f0 [ 15.778521] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.778680] kthread+0x328/0x630 [ 15.778836] ret_from_fork+0x10/0x20 [ 15.778872] [ 15.778893] The buggy address belongs to the object at fff00000c591d600 [ 15.778893] which belongs to the cache kmalloc-16 of size 16 [ 15.778953] The buggy address is located 0 bytes inside of [ 15.778953] freed 16-byte region [fff00000c591d600, fff00000c591d610) [ 15.779014] [ 15.779524] The buggy address belongs to the physical page: [ 15.780053] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10591d [ 15.780400] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.780592] page_type: f5(slab) [ 15.780751] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 15.780956] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 15.780999] page dumped because: kasan: bad access detected [ 15.781032] [ 15.781283] Memory state around the buggy address: [ 15.781395] fff00000c591d500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.781504] fff00000c591d580: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.781816] >fff00000c591d600: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.781965] ^ [ 15.781997] fff00000c591d680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.782515] fff00000c591d700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.782562] ==================================================================
[ 12.891001] ================================================================== [ 12.892145] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 12.892606] Read of size 1 at addr ffff888102514900 by task kunit_try_catch/209 [ 12.893297] [ 12.893599] CPU: 1 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.893649] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.893661] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.893683] Call Trace: [ 12.893695] <TASK> [ 12.893712] dump_stack_lvl+0x73/0xb0 [ 12.893745] print_report+0xd1/0x610 [ 12.893795] ? __virt_addr_valid+0x1db/0x2d0 [ 12.893819] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.893843] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.893867] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.893891] kasan_report+0x141/0x180 [ 12.893913] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.893939] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.893963] __kasan_check_byte+0x3d/0x50 [ 12.893985] kfree_sensitive+0x22/0x90 [ 12.894008] kmalloc_double_kzfree+0x19c/0x350 [ 12.894031] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 12.894056] ? __schedule+0x10cc/0x2b60 [ 12.894079] ? __pfx_read_tsc+0x10/0x10 [ 12.894101] ? ktime_get_ts64+0x86/0x230 [ 12.894126] kunit_try_run_case+0x1a5/0x480 [ 12.894155] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.894178] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.894202] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.894228] ? __kthread_parkme+0x82/0x180 [ 12.894249] ? preempt_count_sub+0x50/0x80 [ 12.894274] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.894298] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.894323] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.894409] kthread+0x337/0x6f0 [ 12.894429] ? trace_preempt_on+0x20/0xc0 [ 12.894453] ? __pfx_kthread+0x10/0x10 [ 12.894473] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.894495] ? calculate_sigpending+0x7b/0xa0 [ 12.894520] ? __pfx_kthread+0x10/0x10 [ 12.894541] ret_from_fork+0x116/0x1d0 [ 12.894561] ? __pfx_kthread+0x10/0x10 [ 12.894581] ret_from_fork_asm+0x1a/0x30 [ 12.894612] </TASK> [ 12.894623] [ 12.902821] Allocated by task 209: [ 12.902987] kasan_save_stack+0x45/0x70 [ 12.903166] kasan_save_track+0x18/0x40 [ 12.903340] kasan_save_alloc_info+0x3b/0x50 [ 12.903550] __kasan_kmalloc+0xb7/0xc0 [ 12.903736] __kmalloc_cache_noprof+0x189/0x420 [ 12.903906] kmalloc_double_kzfree+0xa9/0x350 [ 12.904081] kunit_try_run_case+0x1a5/0x480 [ 12.904289] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.904548] kthread+0x337/0x6f0 [ 12.904789] ret_from_fork+0x116/0x1d0 [ 12.904951] ret_from_fork_asm+0x1a/0x30 [ 12.905124] [ 12.905194] Freed by task 209: [ 12.905342] kasan_save_stack+0x45/0x70 [ 12.905538] kasan_save_track+0x18/0x40 [ 12.905682] kasan_save_free_info+0x3f/0x60 [ 12.905841] __kasan_slab_free+0x56/0x70 [ 12.906059] kfree+0x222/0x3f0 [ 12.906224] kfree_sensitive+0x67/0x90 [ 12.906412] kmalloc_double_kzfree+0x12b/0x350 [ 12.906663] kunit_try_run_case+0x1a5/0x480 [ 12.906819] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.906995] kthread+0x337/0x6f0 [ 12.907113] ret_from_fork+0x116/0x1d0 [ 12.907244] ret_from_fork_asm+0x1a/0x30 [ 12.907425] [ 12.907518] The buggy address belongs to the object at ffff888102514900 [ 12.907518] which belongs to the cache kmalloc-16 of size 16 [ 12.908083] The buggy address is located 0 bytes inside of [ 12.908083] freed 16-byte region [ffff888102514900, ffff888102514910) [ 12.908598] [ 12.908698] The buggy address belongs to the physical page: [ 12.908882] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102514 [ 12.909123] flags: 0x200000000000000(node=0|zone=2) [ 12.909286] page_type: f5(slab) [ 12.909707] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.910070] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.910418] page dumped because: kasan: bad access detected [ 12.910679] [ 12.910854] Memory state around the buggy address: [ 12.911077] ffff888102514800: 00 02 fc fc 00 02 fc fc 00 02 fc fc 00 05 fc fc [ 12.911498] ffff888102514880: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.911730] >ffff888102514900: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.912003] ^ [ 12.912164] ffff888102514980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.912478] ffff888102514a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.912871] ==================================================================