Date
June 2, 2025, 2:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.133566] ================================================================== [ 19.134848] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 19.136033] Read of size 1 at addr fff00000c58f5f40 by task kunit_try_catch/182 [ 19.136338] [ 19.136464] CPU: 1 UID: 0 PID: 182 Comm: kunit_try_catch Tainted: G B N 6.14.10-rc1 #1 [ 19.136562] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.136595] Hardware name: linux,dummy-virt (DT) [ 19.136634] Call trace: [ 19.136661] show_stack+0x20/0x38 (C) [ 19.136726] dump_stack_lvl+0x8c/0xd0 [ 19.136781] print_report+0x118/0x608 [ 19.136834] kasan_report+0xdc/0x128 [ 19.136885] __kasan_check_byte+0x54/0x70 [ 19.136937] kfree_sensitive+0x30/0xb0 [ 19.136989] kmalloc_double_kzfree+0x168/0x308 [ 19.137042] kunit_try_run_case+0x170/0x3f0 [ 19.137096] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.137174] kthread+0x318/0x620 [ 19.137278] ret_from_fork+0x10/0x20 [ 19.137396] [ 19.143671] Allocated by task 182: [ 19.144023] kasan_save_stack+0x3c/0x68 [ 19.144753] kasan_save_track+0x20/0x40 [ 19.145301] kasan_save_alloc_info+0x40/0x58 [ 19.145893] __kasan_kmalloc+0xd4/0xd8 [ 19.146655] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.147209] kmalloc_double_kzfree+0xb8/0x308 [ 19.147619] kunit_try_run_case+0x170/0x3f0 [ 19.148013] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.148476] kthread+0x318/0x620 [ 19.148810] ret_from_fork+0x10/0x20 [ 19.149128] [ 19.149861] Freed by task 182: [ 19.150125] kasan_save_stack+0x3c/0x68 [ 19.150763] kasan_save_track+0x20/0x40 [ 19.151106] kasan_save_free_info+0x4c/0x78 [ 19.151831] __kasan_slab_free+0x6c/0x98 [ 19.152409] kfree+0x214/0x3c8 [ 19.152899] kfree_sensitive+0x80/0xb0 [ 19.153411] kmalloc_double_kzfree+0x11c/0x308 [ 19.154013] kunit_try_run_case+0x170/0x3f0 [ 19.155592] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.156234] kthread+0x318/0x620 [ 19.156745] ret_from_fork+0x10/0x20 [ 19.157289] [ 19.157544] The buggy address belongs to the object at fff00000c58f5f40 [ 19.157544] which belongs to the cache kmalloc-16 of size 16 [ 19.158681] The buggy address is located 0 bytes inside of [ 19.158681] freed 16-byte region [fff00000c58f5f40, fff00000c58f5f50) [ 19.159237] [ 19.159394] The buggy address belongs to the physical page: [ 19.159665] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058f5 [ 19.160025] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.161572] page_type: f5(slab) [ 19.161969] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.162601] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.163763] page dumped because: kasan: bad access detected [ 19.164236] [ 19.164515] Memory state around the buggy address: [ 19.165127] fff00000c58f5e00: 00 02 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.165583] fff00000c58f5e80: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 19.166997] >fff00000c58f5f00: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 19.168212] ^ [ 19.169322] fff00000c58f5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.170659] fff00000c58f6000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 19.173896] ==================================================================
[ 13.035691] ================================================================== [ 13.036157] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19d/0x360 [ 13.036401] Read of size 1 at addr ffff888101b5abc0 by task kunit_try_catch/200 [ 13.036677] [ 13.037185] CPU: 1 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.14.10-rc1 #1 [ 13.037232] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.037244] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.037265] Call Trace: [ 13.037277] <TASK> [ 13.037295] dump_stack_lvl+0x73/0xb0 [ 13.037324] print_report+0xd1/0x650 [ 13.037345] ? __virt_addr_valid+0x1db/0x2d0 [ 13.037367] ? kmalloc_double_kzfree+0x19d/0x360 [ 13.037388] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.037412] ? kmalloc_double_kzfree+0x19d/0x360 [ 13.037434] kasan_report+0x140/0x180 [ 13.037454] ? kmalloc_double_kzfree+0x19d/0x360 [ 13.037478] ? kmalloc_double_kzfree+0x19d/0x360 [ 13.037499] __kasan_check_byte+0x3d/0x50 [ 13.037520] kfree_sensitive+0x22/0x90 [ 13.037541] kmalloc_double_kzfree+0x19d/0x360 [ 13.037562] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 13.037584] ? __schedule+0xce8/0x2840 [ 13.037607] ? __pfx_read_tsc+0x10/0x10 [ 13.037628] ? ktime_get_ts64+0x86/0x230 [ 13.037653] kunit_try_run_case+0x1a6/0x480 [ 13.037676] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.037697] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 13.037719] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.037748] ? __kthread_parkme+0x82/0x160 [ 13.037769] ? preempt_count_sub+0x50/0x80 [ 13.037793] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.037815] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.037841] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.037866] kthread+0x324/0x6e0 [ 13.037886] ? trace_preempt_on+0x20/0xc0 [ 13.037921] ? __pfx_kthread+0x10/0x10 [ 13.037943] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.037964] ? calculate_sigpending+0x7b/0xa0 [ 13.037997] ? __pfx_kthread+0x10/0x10 [ 13.038027] ret_from_fork+0x41/0x80 [ 13.038045] ? __pfx_kthread+0x10/0x10 [ 13.038066] ret_from_fork_asm+0x1a/0x30 [ 13.038097] </TASK> [ 13.038107] [ 13.046395] Allocated by task 200: [ 13.046526] kasan_save_stack+0x45/0x70 [ 13.046816] kasan_save_track+0x18/0x40 [ 13.047104] kasan_save_alloc_info+0x3b/0x50 [ 13.047326] __kasan_kmalloc+0xb7/0xc0 [ 13.047493] __kmalloc_cache_noprof+0x18a/0x420 [ 13.047902] kmalloc_double_kzfree+0xaa/0x360 [ 13.048103] kunit_try_run_case+0x1a6/0x480 [ 13.048246] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.048524] kthread+0x324/0x6e0 [ 13.048697] ret_from_fork+0x41/0x80 [ 13.048880] ret_from_fork_asm+0x1a/0x30 [ 13.049319] [ 13.049417] Freed by task 200: [ 13.049527] kasan_save_stack+0x45/0x70 [ 13.049860] kasan_save_track+0x18/0x40 [ 13.050098] kasan_save_free_info+0x3f/0x60 [ 13.050364] __kasan_slab_free+0x56/0x70 [ 13.050559] kfree+0x224/0x3f0 [ 13.050673] kfree_sensitive+0x67/0x90 [ 13.050801] kmalloc_double_kzfree+0x12c/0x360 [ 13.050945] kunit_try_run_case+0x1a6/0x480 [ 13.051161] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.051436] kthread+0x324/0x6e0 [ 13.051707] ret_from_fork+0x41/0x80 [ 13.051916] ret_from_fork_asm+0x1a/0x30 [ 13.052128] [ 13.052225] The buggy address belongs to the object at ffff888101b5abc0 [ 13.052225] which belongs to the cache kmalloc-16 of size 16 [ 13.052717] The buggy address is located 0 bytes inside of [ 13.052717] freed 16-byte region [ffff888101b5abc0, ffff888101b5abd0) [ 13.053393] [ 13.053487] The buggy address belongs to the physical page: [ 13.053659] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101b5a [ 13.053907] flags: 0x200000000000000(node=0|zone=2) [ 13.054357] page_type: f5(slab) [ 13.054537] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 13.055622] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 13.056541] page dumped because: kasan: bad access detected [ 13.057264] [ 13.057387] Memory state around the buggy address: [ 13.057762] ffff888101b5aa80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 13.058196] ffff888101b5ab00: fa fb fc fc fa fb fc fc 00 05 fc fc fa fb fc fc [ 13.058499] >ffff888101b5ab80: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 13.058986] ^ [ 13.059443] ffff888101b5ac00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.059921] ffff888101b5ac80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.060216] ==================================================================