Date
July 1, 2025, 12:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.705981] ================================================================== [ 19.706036] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 19.706085] Read of size 1 at addr fff00000c79f3950 by task kunit_try_catch/259 [ 19.706137] [ 19.706168] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.706261] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.706304] Hardware name: linux,dummy-virt (DT) [ 19.706337] Call trace: [ 19.706371] show_stack+0x20/0x38 (C) [ 19.706425] dump_stack_lvl+0x8c/0xd0 [ 19.706880] print_report+0x118/0x608 [ 19.707347] kasan_report+0xdc/0x128 [ 19.707441] __asan_report_load1_noabort+0x20/0x30 [ 19.707529] strlen+0xa8/0xb0 [ 19.707786] kasan_strings+0x418/0xb00 [ 19.708062] kunit_try_run_case+0x170/0x3f0 [ 19.708300] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.708693] kthread+0x328/0x630 [ 19.709063] ret_from_fork+0x10/0x20 [ 19.709526] [ 19.709591] Allocated by task 259: [ 19.709651] kasan_save_stack+0x3c/0x68 [ 19.709856] kasan_save_track+0x20/0x40 [ 19.710151] kasan_save_alloc_info+0x40/0x58 [ 19.710477] __kasan_kmalloc+0xd4/0xd8 [ 19.711244] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.711502] kasan_strings+0xc8/0xb00 [ 19.711803] kunit_try_run_case+0x170/0x3f0 [ 19.712155] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.712724] kthread+0x328/0x630 [ 19.712770] ret_from_fork+0x10/0x20 [ 19.712996] [ 19.713093] Freed by task 259: [ 19.713745] kasan_save_stack+0x3c/0x68 [ 19.714176] kasan_save_track+0x20/0x40 [ 19.714428] kasan_save_free_info+0x4c/0x78 [ 19.714508] __kasan_slab_free+0x6c/0x98 [ 19.714680] kfree+0x214/0x3c8 [ 19.714815] kasan_strings+0x24c/0xb00 [ 19.715093] kunit_try_run_case+0x170/0x3f0 [ 19.715150] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.715197] kthread+0x328/0x630 [ 19.715238] ret_from_fork+0x10/0x20 [ 19.715487] [ 19.715624] The buggy address belongs to the object at fff00000c79f3940 [ 19.715624] which belongs to the cache kmalloc-32 of size 32 [ 19.716021] The buggy address is located 16 bytes inside of [ 19.716021] freed 32-byte region [fff00000c79f3940, fff00000c79f3960) [ 19.716302] [ 19.716431] The buggy address belongs to the physical page: [ 19.716797] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1079f3 [ 19.717014] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.717123] page_type: f5(slab) [ 19.717167] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.717438] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.717610] page dumped because: kasan: bad access detected [ 19.717712] [ 19.718180] Memory state around the buggy address: [ 19.718422] fff00000c79f3800: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.718511] fff00000c79f3880: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 19.718648] >fff00000c79f3900: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.718759] ^ [ 19.718861] fff00000c79f3980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.719020] fff00000c79f3a00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.719086] ==================================================================
[ 13.378275] ================================================================== [ 13.378575] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 13.378800] Read of size 1 at addr ffff888103124410 by task kunit_try_catch/276 [ 13.379231] [ 13.379341] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.379381] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.379393] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.379414] Call Trace: [ 13.379427] <TASK> [ 13.379442] dump_stack_lvl+0x73/0xb0 [ 13.379467] print_report+0xd1/0x650 [ 13.379489] ? __virt_addr_valid+0x1db/0x2d0 [ 13.379510] ? strlen+0x8f/0xb0 [ 13.379526] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.379548] ? strlen+0x8f/0xb0 [ 13.379565] kasan_report+0x141/0x180 [ 13.379585] ? strlen+0x8f/0xb0 [ 13.379606] __asan_report_load1_noabort+0x18/0x20 [ 13.379630] strlen+0x8f/0xb0 [ 13.379647] kasan_strings+0x57b/0xe80 [ 13.379666] ? trace_hardirqs_on+0x37/0xe0 [ 13.379687] ? __pfx_kasan_strings+0x10/0x10 [ 13.379707] ? finish_task_switch.isra.0+0x153/0x700 [ 13.379727] ? __switch_to+0x47/0xf50 [ 13.379751] ? __schedule+0x10cc/0x2b60 [ 13.379772] ? __pfx_read_tsc+0x10/0x10 [ 13.379792] ? ktime_get_ts64+0x86/0x230 [ 13.379815] kunit_try_run_case+0x1a5/0x480 [ 13.379837] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.379859] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.379880] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.379902] ? __kthread_parkme+0x82/0x180 [ 13.379921] ? preempt_count_sub+0x50/0x80 [ 13.379942] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.379965] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.379987] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.380010] kthread+0x337/0x6f0 [ 13.380040] ? trace_preempt_on+0x20/0xc0 [ 13.380061] ? __pfx_kthread+0x10/0x10 [ 13.380080] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.380099] ? calculate_sigpending+0x7b/0xa0 [ 13.380121] ? __pfx_kthread+0x10/0x10 [ 13.380141] ret_from_fork+0x116/0x1d0 [ 13.380158] ? __pfx_kthread+0x10/0x10 [ 13.380179] ret_from_fork_asm+0x1a/0x30 [ 13.380208] </TASK> [ 13.380218] [ 13.387352] Allocated by task 276: [ 13.387632] kasan_save_stack+0x45/0x70 [ 13.387771] kasan_save_track+0x18/0x40 [ 13.387905] kasan_save_alloc_info+0x3b/0x50 [ 13.388132] __kasan_kmalloc+0xb7/0xc0 [ 13.388331] __kmalloc_cache_noprof+0x189/0x420 [ 13.388562] kasan_strings+0xc0/0xe80 [ 13.388744] kunit_try_run_case+0x1a5/0x480 [ 13.388928] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.389111] kthread+0x337/0x6f0 [ 13.389359] ret_from_fork+0x116/0x1d0 [ 13.389544] ret_from_fork_asm+0x1a/0x30 [ 13.389740] [ 13.389829] Freed by task 276: [ 13.389936] kasan_save_stack+0x45/0x70 [ 13.390135] kasan_save_track+0x18/0x40 [ 13.390325] kasan_save_free_info+0x3f/0x60 [ 13.390511] __kasan_slab_free+0x56/0x70 [ 13.390667] kfree+0x222/0x3f0 [ 13.390782] kasan_strings+0x2aa/0xe80 [ 13.390912] kunit_try_run_case+0x1a5/0x480 [ 13.391068] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.391241] kthread+0x337/0x6f0 [ 13.391359] ret_from_fork+0x116/0x1d0 [ 13.391488] ret_from_fork_asm+0x1a/0x30 [ 13.391624] [ 13.391693] The buggy address belongs to the object at ffff888103124400 [ 13.391693] which belongs to the cache kmalloc-32 of size 32 [ 13.392228] The buggy address is located 16 bytes inside of [ 13.392228] freed 32-byte region [ffff888103124400, ffff888103124420) [ 13.392738] [ 13.392830] The buggy address belongs to the physical page: [ 13.393087] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103124 [ 13.393444] flags: 0x200000000000000(node=0|zone=2) [ 13.393609] page_type: f5(slab) [ 13.393729] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.393957] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.394191] page dumped because: kasan: bad access detected [ 13.394361] [ 13.394430] Memory state around the buggy address: [ 13.394583] ffff888103124300: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.394912] ffff888103124380: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.395324] >ffff888103124400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.395638] ^ [ 13.395827] ffff888103124480: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.396179] ffff888103124500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.396504] ==================================================================