Date
July 9, 2025, 1:08 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 29.453290] ================================================================== [ 29.453405] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 29.453459] Write of size 33 at addr fff00000c598cc80 by task kunit_try_catch/218 [ 29.453548] [ 29.453623] CPU: 0 UID: 0 PID: 218 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250709 #1 PREEMPT [ 29.453793] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.453822] Hardware name: linux,dummy-virt (DT) [ 29.453852] Call trace: [ 29.453875] show_stack+0x20/0x38 (C) [ 29.453923] dump_stack_lvl+0x8c/0xd0 [ 29.454092] print_report+0x118/0x5d0 [ 29.454275] kasan_report+0xdc/0x128 [ 29.454395] kasan_check_range+0x100/0x1a8 [ 29.454442] __asan_memset+0x34/0x78 [ 29.454487] kmalloc_uaf_memset+0x170/0x310 [ 29.454681] kunit_try_run_case+0x170/0x3f0 [ 29.454736] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.454920] kthread+0x328/0x630 [ 29.454998] ret_from_fork+0x10/0x20 [ 29.455066] [ 29.455087] Allocated by task 218: [ 29.455116] kasan_save_stack+0x3c/0x68 [ 29.455308] kasan_save_track+0x20/0x40 [ 29.455358] kasan_save_alloc_info+0x40/0x58 [ 29.455435] __kasan_kmalloc+0xd4/0xd8 [ 29.455472] __kmalloc_cache_noprof+0x16c/0x3c0 [ 29.455586] kmalloc_uaf_memset+0xb8/0x310 [ 29.455763] kunit_try_run_case+0x170/0x3f0 [ 29.455899] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.455980] kthread+0x328/0x630 [ 29.456091] ret_from_fork+0x10/0x20 [ 29.456138] [ 29.456158] Freed by task 218: [ 29.456185] kasan_save_stack+0x3c/0x68 [ 29.456233] kasan_save_track+0x20/0x40 [ 29.456272] kasan_save_free_info+0x4c/0x78 [ 29.456307] __kasan_slab_free+0x6c/0x98 [ 29.456344] kfree+0x214/0x3c8 [ 29.456379] kmalloc_uaf_memset+0x11c/0x310 [ 29.456416] kunit_try_run_case+0x170/0x3f0 [ 29.456455] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.456497] kthread+0x328/0x630 [ 29.456530] ret_from_fork+0x10/0x20 [ 29.456564] [ 29.456584] The buggy address belongs to the object at fff00000c598cc80 [ 29.456584] which belongs to the cache kmalloc-64 of size 64 [ 29.456829] The buggy address is located 0 bytes inside of [ 29.456829] freed 64-byte region [fff00000c598cc80, fff00000c598ccc0) [ 29.456935] [ 29.456985] The buggy address belongs to the physical page: [ 29.457064] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10598c [ 29.457140] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 29.457242] page_type: f5(slab) [ 29.457282] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 29.457606] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 29.457724] page dumped because: kasan: bad access detected [ 29.457859] [ 29.457949] Memory state around the buggy address: [ 29.457981] fff00000c598cb80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.458247] fff00000c598cc00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.458424] >fff00000c598cc80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.458581] ^ [ 29.458679] fff00000c598cd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.458741] fff00000c598cd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.458948] ==================================================================
[ 24.362873] ================================================================== [ 24.363373] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 24.363662] Write of size 33 at addr ffff8881058cb580 by task kunit_try_catch/236 [ 24.364003] [ 24.364123] CPU: 0 UID: 0 PID: 236 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc5-next-20250709 #1 PREEMPT(voluntary) [ 24.364243] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 24.364258] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.364280] Call Trace: [ 24.364293] <TASK> [ 24.364312] dump_stack_lvl+0x73/0xb0 [ 24.364367] print_report+0xd1/0x610 [ 24.364402] ? __virt_addr_valid+0x1db/0x2d0 [ 24.364427] ? kmalloc_uaf_memset+0x1a3/0x360 [ 24.364446] ? kasan_complete_mode_report_info+0x64/0x200 [ 24.364471] ? kmalloc_uaf_memset+0x1a3/0x360 [ 24.364492] kasan_report+0x141/0x180 [ 24.364513] ? kmalloc_uaf_memset+0x1a3/0x360 [ 24.364538] kasan_check_range+0x10c/0x1c0 [ 24.364561] __asan_memset+0x27/0x50 [ 24.364583] kmalloc_uaf_memset+0x1a3/0x360 [ 24.364604] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 24.364625] ? __schedule+0x10cc/0x2b60 [ 24.364649] ? __pfx_read_tsc+0x10/0x10 [ 24.364671] ? ktime_get_ts64+0x86/0x230 [ 24.364708] kunit_try_run_case+0x1a5/0x480 [ 24.364729] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.364749] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 24.364781] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 24.364805] ? __kthread_parkme+0x82/0x180 [ 24.364825] ? preempt_count_sub+0x50/0x80 [ 24.364850] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.364872] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.364938] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 24.364964] kthread+0x337/0x6f0 [ 24.364983] ? trace_preempt_on+0x20/0xc0 [ 24.365007] ? __pfx_kthread+0x10/0x10 [ 24.365027] ? _raw_spin_unlock_irq+0x47/0x80 [ 24.365048] ? calculate_sigpending+0x7b/0xa0 [ 24.365072] ? __pfx_kthread+0x10/0x10 [ 24.365093] ret_from_fork+0x116/0x1d0 [ 24.365111] ? __pfx_kthread+0x10/0x10 [ 24.365132] ret_from_fork_asm+0x1a/0x30 [ 24.365162] </TASK> [ 24.365174] [ 24.375187] Allocated by task 236: [ 24.375446] kasan_save_stack+0x45/0x70 [ 24.375638] kasan_save_track+0x18/0x40 [ 24.376104] kasan_save_alloc_info+0x3b/0x50 [ 24.376297] __kasan_kmalloc+0xb7/0xc0 [ 24.376453] __kmalloc_cache_noprof+0x189/0x420 [ 24.377036] kmalloc_uaf_memset+0xa9/0x360 [ 24.377218] kunit_try_run_case+0x1a5/0x480 [ 24.377412] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.377740] kthread+0x337/0x6f0 [ 24.378321] ret_from_fork+0x116/0x1d0 [ 24.378482] ret_from_fork_asm+0x1a/0x30 [ 24.378686] [ 24.378927] Freed by task 236: [ 24.379236] kasan_save_stack+0x45/0x70 [ 24.379410] kasan_save_track+0x18/0x40 [ 24.379580] kasan_save_free_info+0x3f/0x60 [ 24.379777] __kasan_slab_free+0x56/0x70 [ 24.379941] kfree+0x222/0x3f0 [ 24.380410] kmalloc_uaf_memset+0x12b/0x360 [ 24.380566] kunit_try_run_case+0x1a5/0x480 [ 24.380892] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.381308] kthread+0x337/0x6f0 [ 24.381470] ret_from_fork+0x116/0x1d0 [ 24.381639] ret_from_fork_asm+0x1a/0x30 [ 24.381815] [ 24.382182] The buggy address belongs to the object at ffff8881058cb580 [ 24.382182] which belongs to the cache kmalloc-64 of size 64 [ 24.382643] The buggy address is located 0 bytes inside of [ 24.382643] freed 64-byte region [ffff8881058cb580, ffff8881058cb5c0) [ 24.383370] [ 24.383480] The buggy address belongs to the physical page: [ 24.383718] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058cb [ 24.384380] flags: 0x200000000000000(node=0|zone=2) [ 24.384729] page_type: f5(slab) [ 24.385064] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 24.385548] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 24.386220] page dumped because: kasan: bad access detected [ 24.386577] [ 24.386649] Memory state around the buggy address: [ 24.386866] ffff8881058cb480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.387778] ffff8881058cb500: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.388635] >ffff8881058cb580: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.389136] ^ [ 24.389563] ffff8881058cb600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.390072] ffff8881058cb680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.390475] ==================================================================