Date
July 4, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.217159] ================================================================== [ 18.217227] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 18.217290] Write of size 33 at addr fff00000c7747980 by task kunit_try_catch/186 [ 18.217341] [ 18.217378] CPU: 0 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.217460] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.217487] Hardware name: linux,dummy-virt (DT) [ 18.217521] Call trace: [ 18.217544] show_stack+0x20/0x38 (C) [ 18.217596] dump_stack_lvl+0x8c/0xd0 [ 18.217645] print_report+0x118/0x608 [ 18.217692] kasan_report+0xdc/0x128 [ 18.217739] kasan_check_range+0x100/0x1a8 [ 18.217787] __asan_memset+0x34/0x78 [ 18.217864] kmalloc_uaf_memset+0x170/0x310 [ 18.217910] kunit_try_run_case+0x170/0x3f0 [ 18.217956] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.218008] kthread+0x328/0x630 [ 18.218051] ret_from_fork+0x10/0x20 [ 18.218098] [ 18.218116] Allocated by task 186: [ 18.218144] kasan_save_stack+0x3c/0x68 [ 18.218183] kasan_save_track+0x20/0x40 [ 18.218219] kasan_save_alloc_info+0x40/0x58 [ 18.218258] __kasan_kmalloc+0xd4/0xd8 [ 18.218293] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.218332] kmalloc_uaf_memset+0xb8/0x310 [ 18.218368] kunit_try_run_case+0x170/0x3f0 [ 18.218403] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.218445] kthread+0x328/0x630 [ 18.218475] ret_from_fork+0x10/0x20 [ 18.218511] [ 18.218528] Freed by task 186: [ 18.218553] kasan_save_stack+0x3c/0x68 [ 18.218588] kasan_save_track+0x20/0x40 [ 18.218624] kasan_save_free_info+0x4c/0x78 [ 18.218661] __kasan_slab_free+0x6c/0x98 [ 18.218698] kfree+0x214/0x3c8 [ 18.218729] kmalloc_uaf_memset+0x11c/0x310 [ 18.218763] kunit_try_run_case+0x170/0x3f0 [ 18.218800] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.218861] kthread+0x328/0x630 [ 18.218892] ret_from_fork+0x10/0x20 [ 18.218952] [ 18.218971] The buggy address belongs to the object at fff00000c7747980 [ 18.218971] which belongs to the cache kmalloc-64 of size 64 [ 18.219028] The buggy address is located 0 bytes inside of [ 18.219028] freed 64-byte region [fff00000c7747980, fff00000c77479c0) [ 18.219088] [ 18.219108] The buggy address belongs to the physical page: [ 18.219140] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107747 [ 18.219194] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.219246] page_type: f5(slab) [ 18.219286] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 18.219334] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 18.219376] page dumped because: kasan: bad access detected [ 18.219431] [ 18.219449] Memory state around the buggy address: [ 18.219484] fff00000c7747880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.219526] fff00000c7747900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.219568] >fff00000c7747980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.220913] ^ [ 18.220952] fff00000c7747a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.221255] fff00000c7747a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.221300] ==================================================================
[ 12.208665] ================================================================== [ 12.209763] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 12.210808] Write of size 33 at addr ffff888102639c80 by task kunit_try_catch/203 [ 12.211192] [ 12.211517] CPU: 0 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 12.211687] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.211702] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.211725] Call Trace: [ 12.211751] <TASK> [ 12.211771] dump_stack_lvl+0x73/0xb0 [ 12.211986] print_report+0xd1/0x650 [ 12.212018] ? __virt_addr_valid+0x1db/0x2d0 [ 12.212041] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.212063] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.212083] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.212104] kasan_report+0x141/0x180 [ 12.212124] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.212148] kasan_check_range+0x10c/0x1c0 [ 12.212170] __asan_memset+0x27/0x50 [ 12.212188] kmalloc_uaf_memset+0x1a3/0x360 [ 12.212208] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 12.212243] ? __schedule+0x10cc/0x2b60 [ 12.212264] ? __pfx_read_tsc+0x10/0x10 [ 12.212284] ? ktime_get_ts64+0x86/0x230 [ 12.212309] kunit_try_run_case+0x1a5/0x480 [ 12.212333] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.212353] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.212375] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.212398] ? __kthread_parkme+0x82/0x180 [ 12.212417] ? preempt_count_sub+0x50/0x80 [ 12.212439] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.212461] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.212482] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.212503] kthread+0x337/0x6f0 [ 12.212521] ? trace_preempt_on+0x20/0xc0 [ 12.212543] ? __pfx_kthread+0x10/0x10 [ 12.212562] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.212581] ? calculate_sigpending+0x7b/0xa0 [ 12.212604] ? __pfx_kthread+0x10/0x10 [ 12.212624] ret_from_fork+0x116/0x1d0 [ 12.212641] ? __pfx_kthread+0x10/0x10 [ 12.212660] ret_from_fork_asm+0x1a/0x30 [ 12.212689] </TASK> [ 12.212700] [ 12.228666] Allocated by task 203: [ 12.229212] kasan_save_stack+0x45/0x70 [ 12.229858] kasan_save_track+0x18/0x40 [ 12.230450] kasan_save_alloc_info+0x3b/0x50 [ 12.230930] __kasan_kmalloc+0xb7/0xc0 [ 12.231076] __kmalloc_cache_noprof+0x189/0x420 [ 12.231495] kmalloc_uaf_memset+0xa9/0x360 [ 12.232068] kunit_try_run_case+0x1a5/0x480 [ 12.232751] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.233523] kthread+0x337/0x6f0 [ 12.233955] ret_from_fork+0x116/0x1d0 [ 12.234098] ret_from_fork_asm+0x1a/0x30 [ 12.234634] [ 12.234873] Freed by task 203: [ 12.235329] kasan_save_stack+0x45/0x70 [ 12.235880] kasan_save_track+0x18/0x40 [ 12.236428] kasan_save_free_info+0x3f/0x60 [ 12.236920] __kasan_slab_free+0x56/0x70 [ 12.237074] kfree+0x222/0x3f0 [ 12.237191] kmalloc_uaf_memset+0x12b/0x360 [ 12.237348] kunit_try_run_case+0x1a5/0x480 [ 12.237770] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.238481] kthread+0x337/0x6f0 [ 12.238951] ret_from_fork+0x116/0x1d0 [ 12.239554] ret_from_fork_asm+0x1a/0x30 [ 12.240137] [ 12.240540] The buggy address belongs to the object at ffff888102639c80 [ 12.240540] which belongs to the cache kmalloc-64 of size 64 [ 12.242129] The buggy address is located 0 bytes inside of [ 12.242129] freed 64-byte region [ffff888102639c80, ffff888102639cc0) [ 12.243253] [ 12.243563] The buggy address belongs to the physical page: [ 12.243784] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102639 [ 12.244035] flags: 0x200000000000000(node=0|zone=2) [ 12.244487] page_type: f5(slab) [ 12.244945] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 12.245958] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 12.246996] page dumped because: kasan: bad access detected [ 12.247833] [ 12.248199] Memory state around the buggy address: [ 12.248678] ffff888102639b80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.249208] ffff888102639c00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.249679] >ffff888102639c80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.250545] ^ [ 12.251033] ffff888102639d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.252072] ffff888102639d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.252823] ==================================================================