Date
July 23, 2025, 2:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.540913] ================================================================== [ 15.541016] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 15.541284] Write of size 33 at addr fff00000c3f90300 by task kunit_try_catch/186 [ 15.541559] [ 15.541600] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT [ 15.541872] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.541908] Hardware name: linux,dummy-virt (DT) [ 15.541964] Call trace: [ 15.541989] show_stack+0x20/0x38 (C) [ 15.542296] dump_stack_lvl+0x8c/0xd0 [ 15.542481] print_report+0x118/0x5d0 [ 15.542543] kasan_report+0xdc/0x128 [ 15.542986] kasan_check_range+0x100/0x1a8 [ 15.543085] __asan_memset+0x34/0x78 [ 15.543254] kmalloc_uaf_memset+0x170/0x310 [ 15.543444] kunit_try_run_case+0x170/0x3f0 [ 15.543500] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.543555] kthread+0x328/0x630 [ 15.543603] ret_from_fork+0x10/0x20 [ 15.544025] [ 15.544069] Allocated by task 186: [ 15.544236] kasan_save_stack+0x3c/0x68 [ 15.544333] kasan_save_track+0x20/0x40 [ 15.544487] kasan_save_alloc_info+0x40/0x58 [ 15.544532] __kasan_kmalloc+0xd4/0xd8 [ 15.544755] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.544989] kmalloc_uaf_memset+0xb8/0x310 [ 15.545112] kunit_try_run_case+0x170/0x3f0 [ 15.545211] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.545307] kthread+0x328/0x630 [ 15.545424] ret_from_fork+0x10/0x20 [ 15.545576] [ 15.545732] Freed by task 186: [ 15.545923] kasan_save_stack+0x3c/0x68 [ 15.546022] kasan_save_track+0x20/0x40 [ 15.546105] kasan_save_free_info+0x4c/0x78 [ 15.546300] __kasan_slab_free+0x6c/0x98 [ 15.546519] kfree+0x214/0x3c8 [ 15.546641] kmalloc_uaf_memset+0x11c/0x310 [ 15.546688] kunit_try_run_case+0x170/0x3f0 [ 15.546749] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.546794] kthread+0x328/0x630 [ 15.546827] ret_from_fork+0x10/0x20 [ 15.546875] [ 15.546895] The buggy address belongs to the object at fff00000c3f90300 [ 15.546895] which belongs to the cache kmalloc-64 of size 64 [ 15.546960] The buggy address is located 0 bytes inside of [ 15.546960] freed 64-byte region [fff00000c3f90300, fff00000c3f90340) [ 15.547036] [ 15.547063] The buggy address belongs to the physical page: [ 15.547110] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f90 [ 15.547168] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.547227] page_type: f5(slab) [ 15.547276] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 15.547329] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 15.547370] page dumped because: kasan: bad access detected [ 15.547402] [ 15.547420] Memory state around the buggy address: [ 15.547471] fff00000c3f90200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.547525] fff00000c3f90280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.547578] >fff00000c3f90300: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.547626] ^ [ 15.547667] fff00000c3f90380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.547720] fff00000c3f90400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.547769] ==================================================================
[ 12.859349] ================================================================== [ 12.860378] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 12.861099] Write of size 33 at addr ffff888102b02d80 by task kunit_try_catch/203 [ 12.862191] [ 12.862373] CPU: 0 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT(voluntary) [ 12.862417] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.862443] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.862464] Call Trace: [ 12.862475] <TASK> [ 12.862490] dump_stack_lvl+0x73/0xb0 [ 12.862527] print_report+0xd1/0x610 [ 12.862549] ? __virt_addr_valid+0x1db/0x2d0 [ 12.862570] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.862591] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.862612] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.862633] kasan_report+0x141/0x180 [ 12.862654] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.862679] kasan_check_range+0x10c/0x1c0 [ 12.862702] __asan_memset+0x27/0x50 [ 12.862721] kmalloc_uaf_memset+0x1a3/0x360 [ 12.862741] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 12.862762] ? __schedule+0x10c6/0x2b60 [ 12.862785] ? __pfx_read_tsc+0x10/0x10 [ 12.862805] ? ktime_get_ts64+0x86/0x230 [ 12.862838] kunit_try_run_case+0x1a5/0x480 [ 12.862862] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.862884] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.862907] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.862929] ? __kthread_parkme+0x82/0x180 [ 12.862949] ? preempt_count_sub+0x50/0x80 [ 12.862971] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.862994] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.863017] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.863039] kthread+0x337/0x6f0 [ 12.863058] ? trace_preempt_on+0x20/0xc0 [ 12.863080] ? __pfx_kthread+0x10/0x10 [ 12.863100] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.863121] ? calculate_sigpending+0x7b/0xa0 [ 12.863144] ? __pfx_kthread+0x10/0x10 [ 12.863164] ret_from_fork+0x116/0x1d0 [ 12.863182] ? __pfx_kthread+0x10/0x10 [ 12.863202] ret_from_fork_asm+0x1a/0x30 [ 12.863233] </TASK> [ 12.863243] [ 12.878058] Allocated by task 203: [ 12.878430] kasan_save_stack+0x45/0x70 [ 12.878928] kasan_save_track+0x18/0x40 [ 12.879468] kasan_save_alloc_info+0x3b/0x50 [ 12.879900] __kasan_kmalloc+0xb7/0xc0 [ 12.880340] __kmalloc_cache_noprof+0x189/0x420 [ 12.880776] kmalloc_uaf_memset+0xa9/0x360 [ 12.881095] kunit_try_run_case+0x1a5/0x480 [ 12.881415] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.881608] kthread+0x337/0x6f0 [ 12.881731] ret_from_fork+0x116/0x1d0 [ 12.881881] ret_from_fork_asm+0x1a/0x30 [ 12.882024] [ 12.882107] Freed by task 203: [ 12.882405] kasan_save_stack+0x45/0x70 [ 12.882852] kasan_save_track+0x18/0x40 [ 12.883285] kasan_save_free_info+0x3f/0x60 [ 12.883694] __kasan_slab_free+0x56/0x70 [ 12.884078] kfree+0x222/0x3f0 [ 12.884494] kmalloc_uaf_memset+0x12b/0x360 [ 12.884904] kunit_try_run_case+0x1a5/0x480 [ 12.885365] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.885863] kthread+0x337/0x6f0 [ 12.886197] ret_from_fork+0x116/0x1d0 [ 12.886630] ret_from_fork_asm+0x1a/0x30 [ 12.887030] [ 12.887224] The buggy address belongs to the object at ffff888102b02d80 [ 12.887224] which belongs to the cache kmalloc-64 of size 64 [ 12.887825] The buggy address is located 0 bytes inside of [ 12.887825] freed 64-byte region [ffff888102b02d80, ffff888102b02dc0) [ 12.888439] [ 12.888704] The buggy address belongs to the physical page: [ 12.889340] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b02 [ 12.890050] flags: 0x200000000000000(node=0|zone=2) [ 12.890709] page_type: f5(slab) [ 12.891033] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 12.891708] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 12.891978] page dumped because: kasan: bad access detected [ 12.892265] [ 12.892470] Memory state around the buggy address: [ 12.892730] ffff888102b02c80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.893042] ffff888102b02d00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.893332] >ffff888102b02d80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.893708] ^ [ 12.893880] ffff888102b02e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.894247] ffff888102b02e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.894560] ==================================================================