Date
July 5, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.124574] ================================================================== [ 19.124740] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 19.124846] Read of size 1 at addr fff00000c56728c8 by task kunit_try_catch/185 [ 19.124963] [ 19.125027] CPU: 0 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.125213] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.125272] Hardware name: linux,dummy-virt (DT) [ 19.125341] Call trace: [ 19.126004] show_stack+0x20/0x38 (C) [ 19.126243] dump_stack_lvl+0x8c/0xd0 [ 19.126429] print_report+0x118/0x608 [ 19.126714] kasan_report+0xdc/0x128 [ 19.127214] __asan_report_load1_noabort+0x20/0x30 [ 19.127485] kmalloc_uaf+0x300/0x338 [ 19.127611] kunit_try_run_case+0x170/0x3f0 [ 19.128134] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.128493] kthread+0x328/0x630 [ 19.128695] ret_from_fork+0x10/0x20 [ 19.128807] [ 19.128881] Allocated by task 185: [ 19.128957] kasan_save_stack+0x3c/0x68 [ 19.129190] kasan_save_track+0x20/0x40 [ 19.129422] kasan_save_alloc_info+0x40/0x58 [ 19.129921] __kasan_kmalloc+0xd4/0xd8 [ 19.130171] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.130398] kmalloc_uaf+0xb8/0x338 [ 19.130638] kunit_try_run_case+0x170/0x3f0 [ 19.130955] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.131065] kthread+0x328/0x630 [ 19.131129] ret_from_fork+0x10/0x20 [ 19.131301] [ 19.131399] Freed by task 185: [ 19.131503] kasan_save_stack+0x3c/0x68 [ 19.131745] kasan_save_track+0x20/0x40 [ 19.131831] kasan_save_free_info+0x4c/0x78 [ 19.131921] __kasan_slab_free+0x6c/0x98 [ 19.132003] kfree+0x214/0x3c8 [ 19.132079] kmalloc_uaf+0x11c/0x338 [ 19.132150] kunit_try_run_case+0x170/0x3f0 [ 19.132484] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.132703] kthread+0x328/0x630 [ 19.132822] ret_from_fork+0x10/0x20 [ 19.133067] [ 19.133246] The buggy address belongs to the object at fff00000c56728c0 [ 19.133246] which belongs to the cache kmalloc-16 of size 16 [ 19.133688] The buggy address is located 8 bytes inside of [ 19.133688] freed 16-byte region [fff00000c56728c0, fff00000c56728d0) [ 19.133923] [ 19.134063] The buggy address belongs to the physical page: [ 19.134153] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105672 [ 19.134421] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.134795] page_type: f5(slab) [ 19.134916] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.135075] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.135219] page dumped because: kasan: bad access detected [ 19.135449] [ 19.135562] Memory state around the buggy address: [ 19.135644] fff00000c5672780: 00 03 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.135758] fff00000c5672800: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.135860] >fff00000c5672880: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 19.135942] ^ [ 19.136024] fff00000c5672900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.136128] fff00000c5672980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.136215] ==================================================================
[ 13.880097] ================================================================== [ 13.880589] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 13.881318] Read of size 1 at addr ffff8881018868a8 by task kunit_try_catch/201 [ 13.881583] [ 13.881709] CPU: 1 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.881765] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.881781] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.882069] Call Trace: [ 13.882093] <TASK> [ 13.882115] dump_stack_lvl+0x73/0xb0 [ 13.882153] print_report+0xd1/0x650 [ 13.882179] ? __virt_addr_valid+0x1db/0x2d0 [ 13.882216] ? kmalloc_uaf+0x320/0x380 [ 13.882239] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.882264] ? kmalloc_uaf+0x320/0x380 [ 13.882288] kasan_report+0x141/0x180 [ 13.882313] ? kmalloc_uaf+0x320/0x380 [ 13.882342] __asan_report_load1_noabort+0x18/0x20 [ 13.882369] kmalloc_uaf+0x320/0x380 [ 13.882392] ? __pfx_kmalloc_uaf+0x10/0x10 [ 13.882416] ? __schedule+0x10cc/0x2b60 [ 13.882447] ? __pfx_read_tsc+0x10/0x10 [ 13.882504] ? ktime_get_ts64+0x86/0x230 [ 13.882533] kunit_try_run_case+0x1a5/0x480 [ 13.882592] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.882619] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.882681] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.882708] ? __kthread_parkme+0x82/0x180 [ 13.882732] ? preempt_count_sub+0x50/0x80 [ 13.882759] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.882786] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.882812] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.882838] kthread+0x337/0x6f0 [ 13.882860] ? trace_preempt_on+0x20/0xc0 [ 13.882888] ? __pfx_kthread+0x10/0x10 [ 13.882911] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.882935] ? calculate_sigpending+0x7b/0xa0 [ 13.882964] ? __pfx_kthread+0x10/0x10 [ 13.882988] ret_from_fork+0x116/0x1d0 [ 13.883010] ? __pfx_kthread+0x10/0x10 [ 13.883047] ret_from_fork_asm+0x1a/0x30 [ 13.883084] </TASK> [ 13.883097] [ 13.895686] Allocated by task 201: [ 13.896193] kasan_save_stack+0x45/0x70 [ 13.896553] kasan_save_track+0x18/0x40 [ 13.896919] kasan_save_alloc_info+0x3b/0x50 [ 13.897177] __kasan_kmalloc+0xb7/0xc0 [ 13.897394] __kmalloc_cache_noprof+0x189/0x420 [ 13.897670] kmalloc_uaf+0xaa/0x380 [ 13.898144] kunit_try_run_case+0x1a5/0x480 [ 13.898343] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.898642] kthread+0x337/0x6f0 [ 13.898840] ret_from_fork+0x116/0x1d0 [ 13.899103] ret_from_fork_asm+0x1a/0x30 [ 13.899382] [ 13.899505] Freed by task 201: [ 13.899689] kasan_save_stack+0x45/0x70 [ 13.899987] kasan_save_track+0x18/0x40 [ 13.900199] kasan_save_free_info+0x3f/0x60 [ 13.900435] __kasan_slab_free+0x56/0x70 [ 13.900695] kfree+0x222/0x3f0 [ 13.901186] kmalloc_uaf+0x12c/0x380 [ 13.901389] kunit_try_run_case+0x1a5/0x480 [ 13.901567] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.902097] kthread+0x337/0x6f0 [ 13.902289] ret_from_fork+0x116/0x1d0 [ 13.902506] ret_from_fork_asm+0x1a/0x30 [ 13.902725] [ 13.902896] The buggy address belongs to the object at ffff8881018868a0 [ 13.902896] which belongs to the cache kmalloc-16 of size 16 [ 13.903641] The buggy address is located 8 bytes inside of [ 13.903641] freed 16-byte region [ffff8881018868a0, ffff8881018868b0) [ 13.904296] [ 13.904537] The buggy address belongs to the physical page: [ 13.904891] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101886 [ 13.905456] flags: 0x200000000000000(node=0|zone=2) [ 13.905767] page_type: f5(slab) [ 13.905960] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 13.906434] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 13.906889] page dumped because: kasan: bad access detected [ 13.907160] [ 13.907275] Memory state around the buggy address: [ 13.907482] ffff888101886780: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 13.907855] ffff888101886800: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 13.908251] >ffff888101886880: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 13.908556] ^ [ 13.909421] ffff888101886900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.910186] ffff888101886980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.910572] ==================================================================