Date
July 5, 2025, 5:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.422142] ================================================================== [ 18.422235] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 18.422474] Write of size 33 at addr fff00000c7818980 by task kunit_try_catch/186 [ 18.422613] [ 18.422683] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.422994] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.423021] Hardware name: linux,dummy-virt (DT) [ 18.423157] Call trace: [ 18.423256] show_stack+0x20/0x38 (C) [ 18.423398] dump_stack_lvl+0x8c/0xd0 [ 18.423544] print_report+0x118/0x608 [ 18.423780] kasan_report+0xdc/0x128 [ 18.424413] kasan_check_range+0x100/0x1a8 [ 18.424503] __asan_memset+0x34/0x78 [ 18.424544] kmalloc_uaf_memset+0x170/0x310 [ 18.424591] kunit_try_run_case+0x170/0x3f0 [ 18.424637] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.424689] kthread+0x328/0x630 [ 18.424729] ret_from_fork+0x10/0x20 [ 18.424776] [ 18.424795] Allocated by task 186: [ 18.424821] kasan_save_stack+0x3c/0x68 [ 18.424870] kasan_save_track+0x20/0x40 [ 18.424908] kasan_save_alloc_info+0x40/0x58 [ 18.424947] __kasan_kmalloc+0xd4/0xd8 [ 18.424986] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.425024] kmalloc_uaf_memset+0xb8/0x310 [ 18.425060] kunit_try_run_case+0x170/0x3f0 [ 18.425116] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.425159] kthread+0x328/0x630 [ 18.425192] ret_from_fork+0x10/0x20 [ 18.425353] [ 18.425382] Freed by task 186: [ 18.425407] kasan_save_stack+0x3c/0x68 [ 18.425446] kasan_save_track+0x20/0x40 [ 18.425482] kasan_save_free_info+0x4c/0x78 [ 18.425521] __kasan_slab_free+0x6c/0x98 [ 18.425557] kfree+0x214/0x3c8 [ 18.425589] kmalloc_uaf_memset+0x11c/0x310 [ 18.425624] kunit_try_run_case+0x170/0x3f0 [ 18.425661] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.425712] kthread+0x328/0x630 [ 18.425830] ret_from_fork+0x10/0x20 [ 18.425881] [ 18.425968] The buggy address belongs to the object at fff00000c7818980 [ 18.425968] which belongs to the cache kmalloc-64 of size 64 [ 18.426023] The buggy address is located 0 bytes inside of [ 18.426023] freed 64-byte region [fff00000c7818980, fff00000c78189c0) [ 18.426122] [ 18.426184] The buggy address belongs to the physical page: [ 18.426214] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107818 [ 18.426411] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.426631] page_type: f5(slab) [ 18.426673] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 18.427206] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 18.427250] page dumped because: kasan: bad access detected [ 18.427281] [ 18.427298] Memory state around the buggy address: [ 18.427356] fff00000c7818880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.427398] fff00000c7818900: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 18.427445] >fff00000c7818980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.427722] ^ [ 18.427750] fff00000c7818a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.427791] fff00000c7818a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.428025] ==================================================================
[ 11.888769] ================================================================== [ 11.889296] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 11.889646] Write of size 33 at addr ffff8881038d5880 by task kunit_try_catch/204 [ 11.890102] [ 11.890196] CPU: 1 UID: 0 PID: 204 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.890240] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.890251] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.890291] Call Trace: [ 11.890303] <TASK> [ 11.890334] dump_stack_lvl+0x73/0xb0 [ 11.890361] print_report+0xd1/0x650 [ 11.890384] ? __virt_addr_valid+0x1db/0x2d0 [ 11.890405] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.890425] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.890503] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.890524] kasan_report+0x141/0x180 [ 11.890545] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.890570] kasan_check_range+0x10c/0x1c0 [ 11.890593] __asan_memset+0x27/0x50 [ 11.890613] kmalloc_uaf_memset+0x1a3/0x360 [ 11.890634] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 11.890687] ? __schedule+0x10cc/0x2b60 [ 11.890709] ? __pfx_read_tsc+0x10/0x10 [ 11.890730] ? ktime_get_ts64+0x86/0x230 [ 11.890754] kunit_try_run_case+0x1a5/0x480 [ 11.890777] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.890799] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.890821] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.890861] ? __kthread_parkme+0x82/0x180 [ 11.890880] ? preempt_count_sub+0x50/0x80 [ 11.890903] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.890926] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.890947] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.890969] kthread+0x337/0x6f0 [ 11.890988] ? trace_preempt_on+0x20/0xc0 [ 11.891011] ? __pfx_kthread+0x10/0x10 [ 11.891031] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.891051] ? calculate_sigpending+0x7b/0xa0 [ 11.891074] ? __pfx_kthread+0x10/0x10 [ 11.891094] ret_from_fork+0x116/0x1d0 [ 11.891112] ? __pfx_kthread+0x10/0x10 [ 11.891132] ret_from_fork_asm+0x1a/0x30 [ 11.891161] </TASK> [ 11.891172] [ 11.899378] Allocated by task 204: [ 11.899586] kasan_save_stack+0x45/0x70 [ 11.899790] kasan_save_track+0x18/0x40 [ 11.900170] kasan_save_alloc_info+0x3b/0x50 [ 11.900622] __kasan_kmalloc+0xb7/0xc0 [ 11.900930] __kmalloc_cache_noprof+0x189/0x420 [ 11.901092] kmalloc_uaf_memset+0xa9/0x360 [ 11.901500] kunit_try_run_case+0x1a5/0x480 [ 11.901749] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.901989] kthread+0x337/0x6f0 [ 11.902139] ret_from_fork+0x116/0x1d0 [ 11.902396] ret_from_fork_asm+0x1a/0x30 [ 11.902585] [ 11.902657] Freed by task 204: [ 11.902768] kasan_save_stack+0x45/0x70 [ 11.902901] kasan_save_track+0x18/0x40 [ 11.903080] kasan_save_free_info+0x3f/0x60 [ 11.903485] __kasan_slab_free+0x56/0x70 [ 11.903681] kfree+0x222/0x3f0 [ 11.903839] kmalloc_uaf_memset+0x12b/0x360 [ 11.904040] kunit_try_run_case+0x1a5/0x480 [ 11.904413] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.904698] kthread+0x337/0x6f0 [ 11.904893] ret_from_fork+0x116/0x1d0 [ 11.905081] ret_from_fork_asm+0x1a/0x30 [ 11.905371] [ 11.905469] The buggy address belongs to the object at ffff8881038d5880 [ 11.905469] which belongs to the cache kmalloc-64 of size 64 [ 11.906024] The buggy address is located 0 bytes inside of [ 11.906024] freed 64-byte region [ffff8881038d5880, ffff8881038d58c0) [ 11.906360] [ 11.906521] The buggy address belongs to the physical page: [ 11.906992] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1038d5 [ 11.907395] flags: 0x200000000000000(node=0|zone=2) [ 11.907697] page_type: f5(slab) [ 11.907918] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.908342] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.908712] page dumped because: kasan: bad access detected [ 11.908977] [ 11.909046] Memory state around the buggy address: [ 11.909199] ffff8881038d5780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.909718] ffff8881038d5800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.910039] >ffff8881038d5880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.910549] ^ [ 11.910775] ffff8881038d5900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.911000] ffff8881038d5980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.911226] ==================================================================