Date
June 7, 2025, 10:40 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 24.154210] ================================================================== [ 24.154925] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 24.155711] Read of size 1 at addr fff00000c41f1950 by task kunit_try_catch/247 [ 24.156438] [ 24.156664] CPU: 1 UID: 0 PID: 247 Comm: kunit_try_catch Tainted: G B N 6.12.33-rc1 #1 [ 24.156774] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.156810] Hardware name: linux,dummy-virt (DT) [ 24.156849] Call trace: [ 24.156877] dump_backtrace+0x9c/0x128 [ 24.156935] show_stack+0x20/0x38 [ 24.157039] dump_stack_lvl+0x8c/0xd0 [ 24.157158] print_report+0x118/0x5f0 [ 24.157281] kasan_report+0xdc/0x128 [ 24.157397] __asan_report_load1_noabort+0x20/0x30 [ 24.157527] strlen+0xa8/0xb0 [ 24.157643] kasan_strings+0x334/0x938 [ 24.157771] kunit_try_run_case+0x170/0x3f0 [ 24.157893] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.158042] kthread+0x24c/0x2d0 [ 24.158157] ret_from_fork+0x10/0x20 [ 24.158275] [ 24.166325] Allocated by task 247: [ 24.166817] kasan_save_stack+0x3c/0x68 [ 24.167281] kasan_save_track+0x20/0x40 [ 24.168035] kasan_save_alloc_info+0x40/0x58 [ 24.168654] __kasan_kmalloc+0xd4/0xd8 [ 24.169212] __kmalloc_cache_noprof+0x154/0x320 [ 24.169847] kasan_strings+0xb0/0x938 [ 24.170379] kunit_try_run_case+0x170/0x3f0 [ 24.170923] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.171666] kthread+0x24c/0x2d0 [ 24.172174] ret_from_fork+0x10/0x20 [ 24.172700] [ 24.173037] Freed by task 247: [ 24.173464] kasan_save_stack+0x3c/0x68 [ 24.174930] kasan_save_track+0x20/0x40 [ 24.175343] kasan_save_free_info+0x4c/0x78 [ 24.176097] __kasan_slab_free+0x6c/0x98 [ 24.176622] kfree+0x110/0x3b8 [ 24.177509] kasan_strings+0x128/0x938 [ 24.177905] kunit_try_run_case+0x170/0x3f0 [ 24.178630] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.179423] kthread+0x24c/0x2d0 [ 24.180083] ret_from_fork+0x10/0x20 [ 24.180511] [ 24.180797] The buggy address belongs to the object at fff00000c41f1940 [ 24.180797] which belongs to the cache kmalloc-32 of size 32 [ 24.181887] The buggy address is located 16 bytes inside of [ 24.181887] freed 32-byte region [fff00000c41f1940, fff00000c41f1960) [ 24.184130] [ 24.184532] The buggy address belongs to the physical page: [ 24.185165] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1041f1 [ 24.185898] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 24.186825] page_type: f5(slab) [ 24.187265] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 24.188521] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 24.189240] page dumped because: kasan: bad access detected [ 24.189988] [ 24.190460] Memory state around the buggy address: [ 24.191173] fff00000c41f1800: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 24.192155] fff00000c41f1880: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 24.192876] >fff00000c41f1900: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 24.193606] ^ [ 24.194205] fff00000c41f1980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.195127] fff00000c41f1a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.196205] ==================================================================
[ 20.890202] ================================================================== [ 20.890987] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 20.891851] Read of size 1 at addr ffff888102af74d0 by task kunit_try_catch/264 [ 20.892421] [ 20.892691] CPU: 1 UID: 0 PID: 264 Comm: kunit_try_catch Tainted: G B N 6.12.33-rc1 #1 [ 20.892849] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.892982] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 20.893043] Call Trace: [ 20.893099] <TASK> [ 20.893150] dump_stack_lvl+0x73/0xb0 [ 20.893247] print_report+0xd1/0x640 [ 20.893332] ? __virt_addr_valid+0x1db/0x2d0 [ 20.893408] ? strlen+0x8f/0xb0 [ 20.893916] ? kasan_complete_mode_report_info+0x64/0x200 [ 20.893993] ? strlen+0x8f/0xb0 [ 20.894063] kasan_report+0x140/0x180 [ 20.894111] ? strlen+0x8f/0xb0 [ 20.894147] __asan_report_load1_noabort+0x18/0x20 [ 20.894179] strlen+0x8f/0xb0 [ 20.894208] kasan_strings+0x432/0xb60 [ 20.894273] ? __pfx_kasan_strings+0x10/0x10 [ 20.894308] ? __schedule+0xc49/0x27a0 [ 20.894336] ? __pfx_read_tsc+0x10/0x10 [ 20.894362] ? ktime_get_ts64+0x84/0x230 [ 20.894398] kunit_try_run_case+0x1a6/0x480 [ 20.894431] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.894528] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 20.894597] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 20.894633] ? __kthread_parkme+0x82/0x160 [ 20.894663] ? preempt_count_sub+0x50/0x80 [ 20.894695] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.894724] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 20.894761] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.894798] kthread+0x257/0x310 [ 20.894862] ? __pfx_kthread+0x10/0x10 [ 20.894893] ret_from_fork+0x41/0x80 [ 20.894922] ? __pfx_kthread+0x10/0x10 [ 20.894947] ret_from_fork_asm+0x1a/0x30 [ 20.894987] </TASK> [ 20.895002] [ 20.910850] Allocated by task 264: [ 20.911627] kasan_save_stack+0x45/0x70 [ 20.912055] kasan_save_track+0x18/0x40 [ 20.912704] kasan_save_alloc_info+0x3b/0x50 [ 20.913216] __kasan_kmalloc+0xb7/0xc0 [ 20.913737] __kmalloc_cache_noprof+0x168/0x350 [ 20.914700] kasan_strings+0xb3/0xb60 [ 20.915304] kunit_try_run_case+0x1a6/0x480 [ 20.916026] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.916678] kthread+0x257/0x310 [ 20.917128] ret_from_fork+0x41/0x80 [ 20.917968] ret_from_fork_asm+0x1a/0x30 [ 20.918393] [ 20.918622] Freed by task 264: [ 20.918988] kasan_save_stack+0x45/0x70 [ 20.919756] kasan_save_track+0x18/0x40 [ 20.920177] kasan_save_free_info+0x3f/0x60 [ 20.920806] __kasan_slab_free+0x56/0x70 [ 20.921238] kfree+0x123/0x3d0 [ 20.922068] kasan_strings+0x13a/0xb60 [ 20.922456] kunit_try_run_case+0x1a6/0x480 [ 20.922826] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.923377] kthread+0x257/0x310 [ 20.923720] ret_from_fork+0x41/0x80 [ 20.924150] ret_from_fork_asm+0x1a/0x30 [ 20.924790] [ 20.925016] The buggy address belongs to the object at ffff888102af74c0 [ 20.925016] which belongs to the cache kmalloc-32 of size 32 [ 20.926296] The buggy address is located 16 bytes inside of [ 20.926296] freed 32-byte region [ffff888102af74c0, ffff888102af74e0) [ 20.927700] [ 20.927986] The buggy address belongs to the physical page: [ 20.928612] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102af7 [ 20.929332] flags: 0x200000000000000(node=0|zone=2) [ 20.930291] page_type: f5(slab) [ 20.931107] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 20.931848] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 20.932800] page dumped because: kasan: bad access detected [ 20.933361] [ 20.934151] Memory state around the buggy address: [ 20.934493] ffff888102af7380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.935458] ffff888102af7400: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.936350] >ffff888102af7480: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.937357] ^ [ 20.938659] ffff888102af7500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.939947] ffff888102af7580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.940453] ==================================================================