Date
July 5, 2025, 5:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.286336] ================================================================== [ 18.286439] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 18.286740] Read of size 16 at addr fff00000c5cb36e0 by task kunit_try_catch/168 [ 18.286910] [ 18.287144] CPU: 1 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.287430] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.287555] Hardware name: linux,dummy-virt (DT) [ 18.287696] Call trace: [ 18.287806] show_stack+0x20/0x38 (C) [ 18.287999] dump_stack_lvl+0x8c/0xd0 [ 18.288093] print_report+0x118/0x608 [ 18.288382] kasan_report+0xdc/0x128 [ 18.288578] __asan_report_load16_noabort+0x20/0x30 [ 18.288681] kmalloc_uaf_16+0x3bc/0x438 [ 18.288912] kunit_try_run_case+0x170/0x3f0 [ 18.289307] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.289401] kthread+0x328/0x630 [ 18.289531] ret_from_fork+0x10/0x20 [ 18.289697] [ 18.289757] Allocated by task 168: [ 18.289879] kasan_save_stack+0x3c/0x68 [ 18.289924] kasan_save_track+0x20/0x40 [ 18.290195] kasan_save_alloc_info+0x40/0x58 [ 18.290406] __kasan_kmalloc+0xd4/0xd8 [ 18.290449] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.290504] kmalloc_uaf_16+0x140/0x438 [ 18.290768] kunit_try_run_case+0x170/0x3f0 [ 18.291008] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.291324] kthread+0x328/0x630 [ 18.291466] ret_from_fork+0x10/0x20 [ 18.291515] [ 18.291767] Freed by task 168: [ 18.291814] kasan_save_stack+0x3c/0x68 [ 18.291965] kasan_save_track+0x20/0x40 [ 18.292101] kasan_save_free_info+0x4c/0x78 [ 18.292494] __kasan_slab_free+0x6c/0x98 [ 18.292775] kfree+0x214/0x3c8 [ 18.293167] kmalloc_uaf_16+0x190/0x438 [ 18.293375] kunit_try_run_case+0x170/0x3f0 [ 18.293452] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.294083] kthread+0x328/0x630 [ 18.294274] ret_from_fork+0x10/0x20 [ 18.294460] [ 18.294580] The buggy address belongs to the object at fff00000c5cb36e0 [ 18.294580] which belongs to the cache kmalloc-16 of size 16 [ 18.294784] The buggy address is located 0 bytes inside of [ 18.294784] freed 16-byte region [fff00000c5cb36e0, fff00000c5cb36f0) [ 18.294921] [ 18.294951] The buggy address belongs to the physical page: [ 18.294997] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105cb3 [ 18.295050] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.295374] page_type: f5(slab) [ 18.295532] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.295687] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.295731] page dumped because: kasan: bad access detected [ 18.295949] [ 18.296144] Memory state around the buggy address: [ 18.296206] fff00000c5cb3580: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.296262] fff00000c5cb3600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.296503] >fff00000c5cb3680: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 18.296710] ^ [ 18.296748] fff00000c5cb3700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.297087] fff00000c5cb3780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.297236] ==================================================================
[ 11.614400] ================================================================== [ 11.615182] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 11.615561] Read of size 16 at addr ffff88810274c220 by task kunit_try_catch/186 [ 11.615874] [ 11.615986] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.616029] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.616040] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.616061] Call Trace: [ 11.616073] <TASK> [ 11.616088] dump_stack_lvl+0x73/0xb0 [ 11.616114] print_report+0xd1/0x650 [ 11.616135] ? __virt_addr_valid+0x1db/0x2d0 [ 11.616157] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.616176] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.616247] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.616270] kasan_report+0x141/0x180 [ 11.616291] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.616316] __asan_report_load16_noabort+0x18/0x20 [ 11.616340] kmalloc_uaf_16+0x47b/0x4c0 [ 11.616360] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 11.616381] ? __schedule+0x10cc/0x2b60 [ 11.616402] ? __pfx_read_tsc+0x10/0x10 [ 11.616423] ? ktime_get_ts64+0x86/0x230 [ 11.616448] kunit_try_run_case+0x1a5/0x480 [ 11.616485] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.616506] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.616528] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.616550] ? __kthread_parkme+0x82/0x180 [ 11.616569] ? preempt_count_sub+0x50/0x80 [ 11.616591] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.616614] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.616636] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.616657] kthread+0x337/0x6f0 [ 11.616676] ? trace_preempt_on+0x20/0xc0 [ 11.616698] ? __pfx_kthread+0x10/0x10 [ 11.616718] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.616738] ? calculate_sigpending+0x7b/0xa0 [ 11.616763] ? __pfx_kthread+0x10/0x10 [ 11.616787] ret_from_fork+0x116/0x1d0 [ 11.616806] ? __pfx_kthread+0x10/0x10 [ 11.616825] ret_from_fork_asm+0x1a/0x30 [ 11.616855] </TASK> [ 11.616866] [ 11.625738] Allocated by task 186: [ 11.625945] kasan_save_stack+0x45/0x70 [ 11.626112] kasan_save_track+0x18/0x40 [ 11.626265] kasan_save_alloc_info+0x3b/0x50 [ 11.626620] __kasan_kmalloc+0xb7/0xc0 [ 11.626763] __kmalloc_cache_noprof+0x189/0x420 [ 11.626955] kmalloc_uaf_16+0x15b/0x4c0 [ 11.627143] kunit_try_run_case+0x1a5/0x480 [ 11.627485] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.627755] kthread+0x337/0x6f0 [ 11.627899] ret_from_fork+0x116/0x1d0 [ 11.628030] ret_from_fork_asm+0x1a/0x30 [ 11.628278] [ 11.628376] Freed by task 186: [ 11.628533] kasan_save_stack+0x45/0x70 [ 11.628668] kasan_save_track+0x18/0x40 [ 11.628870] kasan_save_free_info+0x3f/0x60 [ 11.629070] __kasan_slab_free+0x56/0x70 [ 11.629243] kfree+0x222/0x3f0 [ 11.629386] kmalloc_uaf_16+0x1d6/0x4c0 [ 11.629529] kunit_try_run_case+0x1a5/0x480 [ 11.629671] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.629918] kthread+0x337/0x6f0 [ 11.630305] ret_from_fork+0x116/0x1d0 [ 11.630523] ret_from_fork_asm+0x1a/0x30 [ 11.630677] [ 11.630787] The buggy address belongs to the object at ffff88810274c220 [ 11.630787] which belongs to the cache kmalloc-16 of size 16 [ 11.631269] The buggy address is located 0 bytes inside of [ 11.631269] freed 16-byte region [ffff88810274c220, ffff88810274c230) [ 11.631821] [ 11.631913] The buggy address belongs to the physical page: [ 11.632129] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10274c [ 11.632481] flags: 0x200000000000000(node=0|zone=2) [ 11.632644] page_type: f5(slab) [ 11.632785] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.633286] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.633523] page dumped because: kasan: bad access detected [ 11.633688] [ 11.633835] Memory state around the buggy address: [ 11.634063] ffff88810274c100: 00 02 fc fc 00 02 fc fc 00 02 fc fc 00 02 fc fc [ 11.634376] ffff88810274c180: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.634703] >ffff88810274c200: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 11.635239] ^ [ 11.635425] ffff88810274c280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.635737] ffff88810274c300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.636006] ==================================================================