Date
July 1, 2025, 3:08 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.979276] ================================================================== [ 16.979355] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 16.979418] Read of size 16 at addr fff00000c56b6100 by task kunit_try_catch/169 [ 16.979470] [ 16.979508] CPU: 1 UID: 0 PID: 169 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 16.979608] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.979635] Hardware name: linux,dummy-virt (DT) [ 16.979668] Call trace: [ 16.979690] show_stack+0x20/0x38 (C) [ 16.979741] dump_stack_lvl+0x8c/0xd0 [ 16.980005] print_report+0x118/0x608 [ 16.980208] kasan_report+0xdc/0x128 [ 16.980321] __asan_report_load16_noabort+0x20/0x30 [ 16.980369] kmalloc_uaf_16+0x3bc/0x438 [ 16.980412] kunit_try_run_case+0x170/0x3f0 [ 16.980873] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.981049] kthread+0x328/0x630 [ 16.981110] ret_from_fork+0x10/0x20 [ 16.981232] [ 16.981251] Allocated by task 169: [ 16.981284] kasan_save_stack+0x3c/0x68 [ 16.981376] kasan_save_track+0x20/0x40 [ 16.981414] kasan_save_alloc_info+0x40/0x58 [ 16.981644] __kasan_kmalloc+0xd4/0xd8 [ 16.981736] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.981807] kmalloc_uaf_16+0x140/0x438 [ 16.981863] kunit_try_run_case+0x170/0x3f0 [ 16.981901] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.981943] kthread+0x328/0x630 [ 16.981977] ret_from_fork+0x10/0x20 [ 16.982013] [ 16.982031] Freed by task 169: [ 16.982058] kasan_save_stack+0x3c/0x68 [ 16.982121] kasan_save_track+0x20/0x40 [ 16.982157] kasan_save_free_info+0x4c/0x78 [ 16.982221] __kasan_slab_free+0x6c/0x98 [ 16.982257] kfree+0x214/0x3c8 [ 16.982451] kmalloc_uaf_16+0x190/0x438 [ 16.982493] kunit_try_run_case+0x170/0x3f0 [ 16.982549] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.982614] kthread+0x328/0x630 [ 16.982733] ret_from_fork+0x10/0x20 [ 16.982795] [ 16.982814] The buggy address belongs to the object at fff00000c56b6100 [ 16.982814] which belongs to the cache kmalloc-16 of size 16 [ 16.983039] The buggy address is located 0 bytes inside of [ 16.983039] freed 16-byte region [fff00000c56b6100, fff00000c56b6110) [ 16.983163] [ 16.983185] The buggy address belongs to the physical page: [ 16.983218] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1056b6 [ 16.983275] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.983327] page_type: f5(slab) [ 16.983370] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.983421] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.983462] page dumped because: kasan: bad access detected [ 16.983492] [ 16.983509] Memory state around the buggy address: [ 16.983543] fff00000c56b6000: fa fb fc fc 00 02 fc fc fa fb fc fc fa fb fc fc [ 16.983982] fff00000c56b6080: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 16.984164] >fff00000c56b6100: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.984203] ^ [ 16.984231] fff00000c56b6180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.984273] fff00000c56b6200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.984459] ==================================================================
[ 11.587138] ================================================================== [ 11.587557] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 11.588267] Read of size 16 at addr ffff8881021d56c0 by task kunit_try_catch/185 [ 11.588599] [ 11.588725] CPU: 0 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.588771] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.588782] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.588803] Call Trace: [ 11.588868] <TASK> [ 11.588920] dump_stack_lvl+0x73/0xb0 [ 11.588953] print_report+0xd1/0x650 [ 11.589018] ? __virt_addr_valid+0x1db/0x2d0 [ 11.589053] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.589073] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.589094] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.589113] kasan_report+0x141/0x180 [ 11.589143] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.589167] __asan_report_load16_noabort+0x18/0x20 [ 11.589191] kmalloc_uaf_16+0x47b/0x4c0 [ 11.589221] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 11.589242] ? __schedule+0x10cc/0x2b60 [ 11.589264] ? __pfx_read_tsc+0x10/0x10 [ 11.589284] ? ktime_get_ts64+0x86/0x230 [ 11.589317] kunit_try_run_case+0x1a5/0x480 [ 11.589341] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.589362] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.589394] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.589415] ? __kthread_parkme+0x82/0x180 [ 11.589435] ? preempt_count_sub+0x50/0x80 [ 11.589457] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.589479] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.589500] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.589521] kthread+0x337/0x6f0 [ 11.589539] ? trace_preempt_on+0x20/0xc0 [ 11.589570] ? __pfx_kthread+0x10/0x10 [ 11.589589] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.589609] ? calculate_sigpending+0x7b/0xa0 [ 11.589718] ? __pfx_kthread+0x10/0x10 [ 11.589742] ret_from_fork+0x116/0x1d0 [ 11.589761] ? __pfx_kthread+0x10/0x10 [ 11.589780] ret_from_fork_asm+0x1a/0x30 [ 11.589810] </TASK> [ 11.589822] [ 11.600700] Allocated by task 185: [ 11.601058] kasan_save_stack+0x45/0x70 [ 11.601440] kasan_save_track+0x18/0x40 [ 11.601876] kasan_save_alloc_info+0x3b/0x50 [ 11.602283] __kasan_kmalloc+0xb7/0xc0 [ 11.602739] __kmalloc_cache_noprof+0x189/0x420 [ 11.603217] kmalloc_uaf_16+0x15b/0x4c0 [ 11.603578] kunit_try_run_case+0x1a5/0x480 [ 11.604089] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.604577] kthread+0x337/0x6f0 [ 11.604925] ret_from_fork+0x116/0x1d0 [ 11.605199] ret_from_fork_asm+0x1a/0x30 [ 11.605342] [ 11.605412] Freed by task 185: [ 11.605524] kasan_save_stack+0x45/0x70 [ 11.605844] kasan_save_track+0x18/0x40 [ 11.606214] kasan_save_free_info+0x3f/0x60 [ 11.606615] __kasan_slab_free+0x56/0x70 [ 11.607072] kfree+0x222/0x3f0 [ 11.607379] kmalloc_uaf_16+0x1d6/0x4c0 [ 11.607829] kunit_try_run_case+0x1a5/0x480 [ 11.608235] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.608458] kthread+0x337/0x6f0 [ 11.608849] ret_from_fork+0x116/0x1d0 [ 11.609117] ret_from_fork_asm+0x1a/0x30 [ 11.609257] [ 11.609327] The buggy address belongs to the object at ffff8881021d56c0 [ 11.609327] which belongs to the cache kmalloc-16 of size 16 [ 11.609870] The buggy address is located 0 bytes inside of [ 11.609870] freed 16-byte region [ffff8881021d56c0, ffff8881021d56d0) [ 11.610981] [ 11.611154] The buggy address belongs to the physical page: [ 11.611655] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1021d5 [ 11.612478] flags: 0x200000000000000(node=0|zone=2) [ 11.612935] page_type: f5(slab) [ 11.613134] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.613782] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.614009] page dumped because: kasan: bad access detected [ 11.614188] [ 11.614257] Memory state around the buggy address: [ 11.614413] ffff8881021d5580: 00 00 fc fc 00 02 fc fc 00 02 fc fc 00 06 fc fc [ 11.614686] ffff8881021d5600: 00 06 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.615320] >ffff8881021d5680: fa fb fc fc 00 00 fc fc fa fb fc fc fc fc fc fc [ 11.616031] ^ [ 11.616505] ffff8881021d5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.617192] ffff8881021d5780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.617870] ==================================================================