Date
July 12, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.376399] ================================================================== [ 19.376636] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 19.376757] Read of size 16 at addr fff00000c4561ae0 by task kunit_try_catch/169 [ 19.376987] [ 19.377161] CPU: 0 UID: 0 PID: 169 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.377474] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.377798] Hardware name: linux,dummy-virt (DT) [ 19.377892] Call trace: [ 19.377951] show_stack+0x20/0x38 (C) [ 19.378072] dump_stack_lvl+0x8c/0xd0 [ 19.378177] print_report+0x118/0x608 [ 19.378386] kasan_report+0xdc/0x128 [ 19.378613] __asan_report_load16_noabort+0x20/0x30 [ 19.378832] kmalloc_uaf_16+0x3bc/0x438 [ 19.378951] kunit_try_run_case+0x170/0x3f0 [ 19.379067] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.379184] kthread+0x328/0x630 [ 19.379538] ret_from_fork+0x10/0x20 [ 19.379758] [ 19.379815] Allocated by task 169: [ 19.379979] kasan_save_stack+0x3c/0x68 [ 19.380083] kasan_save_track+0x20/0x40 [ 19.380192] kasan_save_alloc_info+0x40/0x58 [ 19.380278] __kasan_kmalloc+0xd4/0xd8 [ 19.380356] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.380447] kmalloc_uaf_16+0x140/0x438 [ 19.380529] kunit_try_run_case+0x170/0x3f0 [ 19.381036] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.381164] kthread+0x328/0x630 [ 19.381303] ret_from_fork+0x10/0x20 [ 19.381475] [ 19.381725] Freed by task 169: [ 19.381815] kasan_save_stack+0x3c/0x68 [ 19.381927] kasan_save_track+0x20/0x40 [ 19.382007] kasan_save_free_info+0x4c/0x78 [ 19.382230] __kasan_slab_free+0x6c/0x98 [ 19.382374] kfree+0x214/0x3c8 [ 19.382454] kmalloc_uaf_16+0x190/0x438 [ 19.382686] kunit_try_run_case+0x170/0x3f0 [ 19.382832] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.383071] kthread+0x328/0x630 [ 19.383141] ret_from_fork+0x10/0x20 [ 19.383550] [ 19.383618] The buggy address belongs to the object at fff00000c4561ae0 [ 19.383618] which belongs to the cache kmalloc-16 of size 16 [ 19.383761] The buggy address is located 0 bytes inside of [ 19.383761] freed 16-byte region [fff00000c4561ae0, fff00000c4561af0) [ 19.383920] [ 19.383967] The buggy address belongs to the physical page: [ 19.384035] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104561 [ 19.384158] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.384265] page_type: f5(slab) [ 19.384355] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.384474] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.384568] page dumped because: kasan: bad access detected [ 19.384638] [ 19.385112] Memory state around the buggy address: [ 19.385288] fff00000c4561980: fa fb fc fc fa fb fc fc 00 02 fc fc fa fb fc fc [ 19.385396] fff00000c4561a00: fa fb fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 19.385503] >fff00000c4561a80: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 19.385598] ^ [ 19.386074] fff00000c4561b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.386460] fff00000c4561b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.386604] ==================================================================
[ 12.667779] ================================================================== [ 12.668234] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 12.668541] Read of size 16 at addr ffff888101c05ce0 by task kunit_try_catch/186 [ 12.669016] [ 12.669130] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.669172] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.669183] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.669202] Call Trace: [ 12.669215] <TASK> [ 12.669230] dump_stack_lvl+0x73/0xb0 [ 12.669258] print_report+0xd1/0x650 [ 12.669280] ? __virt_addr_valid+0x1db/0x2d0 [ 12.669303] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.669347] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.669371] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.669392] kasan_report+0x141/0x180 [ 12.669414] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.669460] __asan_report_load16_noabort+0x18/0x20 [ 12.669499] kmalloc_uaf_16+0x47b/0x4c0 [ 12.669520] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 12.669542] ? __schedule+0x10cc/0x2b60 [ 12.669564] ? __pfx_read_tsc+0x10/0x10 [ 12.669585] ? ktime_get_ts64+0x86/0x230 [ 12.669627] kunit_try_run_case+0x1a5/0x480 [ 12.669651] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.669673] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.669697] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.669928] ? __kthread_parkme+0x82/0x180 [ 12.669949] ? preempt_count_sub+0x50/0x80 [ 12.669984] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.670028] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.670053] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.670078] kthread+0x337/0x6f0 [ 12.670097] ? trace_preempt_on+0x20/0xc0 [ 12.670120] ? __pfx_kthread+0x10/0x10 [ 12.670140] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.670173] ? calculate_sigpending+0x7b/0xa0 [ 12.670197] ? __pfx_kthread+0x10/0x10 [ 12.670218] ret_from_fork+0x116/0x1d0 [ 12.670236] ? __pfx_kthread+0x10/0x10 [ 12.670256] ret_from_fork_asm+0x1a/0x30 [ 12.670286] </TASK> [ 12.670296] [ 12.678087] Allocated by task 186: [ 12.678407] kasan_save_stack+0x45/0x70 [ 12.678575] kasan_save_track+0x18/0x40 [ 12.678972] kasan_save_alloc_info+0x3b/0x50 [ 12.679160] __kasan_kmalloc+0xb7/0xc0 [ 12.679399] __kmalloc_cache_noprof+0x189/0x420 [ 12.679638] kmalloc_uaf_16+0x15b/0x4c0 [ 12.679803] kunit_try_run_case+0x1a5/0x480 [ 12.679952] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.680248] kthread+0x337/0x6f0 [ 12.680507] ret_from_fork+0x116/0x1d0 [ 12.680687] ret_from_fork_asm+0x1a/0x30 [ 12.681076] [ 12.681157] Freed by task 186: [ 12.681291] kasan_save_stack+0x45/0x70 [ 12.681512] kasan_save_track+0x18/0x40 [ 12.681759] kasan_save_free_info+0x3f/0x60 [ 12.681915] __kasan_slab_free+0x56/0x70 [ 12.682053] kfree+0x222/0x3f0 [ 12.682169] kmalloc_uaf_16+0x1d6/0x4c0 [ 12.682382] kunit_try_run_case+0x1a5/0x480 [ 12.682595] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.683037] kthread+0x337/0x6f0 [ 12.683333] ret_from_fork+0x116/0x1d0 [ 12.683518] ret_from_fork_asm+0x1a/0x30 [ 12.683805] [ 12.683878] The buggy address belongs to the object at ffff888101c05ce0 [ 12.683878] which belongs to the cache kmalloc-16 of size 16 [ 12.684359] The buggy address is located 0 bytes inside of [ 12.684359] freed 16-byte region [ffff888101c05ce0, ffff888101c05cf0) [ 12.684833] [ 12.684905] The buggy address belongs to the physical page: [ 12.685073] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101c05 [ 12.685437] flags: 0x200000000000000(node=0|zone=2) [ 12.685936] page_type: f5(slab) [ 12.686190] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.686530] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.686874] page dumped because: kasan: bad access detected [ 12.687216] [ 12.687286] Memory state around the buggy address: [ 12.687531] ffff888101c05b80: 00 04 fc fc 00 04 fc fc 00 00 fc fc fa fb fc fc [ 12.687857] ffff888101c05c00: fa fb fc fc fa fb fc fc fa fb fc fc 00 05 fc fc [ 12.688153] >ffff888101c05c80: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 12.688455] ^ [ 12.688781] ffff888101c05d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.688995] ffff888101c05d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.689482] ==================================================================