Date
June 2, 2025, 2:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.091561] ================================================================== [ 22.092786] BUG: KASAN: slab-use-after-free in strchr+0xcc/0xd8 [ 22.093532] Read of size 1 at addr fff00000c6cfdcd0 by task kunit_try_catch/246 [ 22.094284] [ 22.094629] CPU: 0 UID: 0 PID: 246 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 22.094861] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.094934] Hardware name: linux,dummy-virt (DT) [ 22.095023] Call trace: [ 22.095087] dump_backtrace+0x9c/0x128 [ 22.095218] show_stack+0x20/0x38 [ 22.095333] dump_stack_lvl+0x8c/0xd0 [ 22.095491] print_report+0x118/0x5f0 [ 22.095586] kasan_report+0xdc/0x128 [ 22.095666] __asan_report_load1_noabort+0x20/0x30 [ 22.095765] strchr+0xcc/0xd8 [ 22.095841] kasan_strings+0x18c/0x938 [ 22.095931] kunit_try_run_case+0x170/0x3f0 [ 22.096022] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.096121] kthread+0x24c/0x2d0 [ 22.096212] ret_from_fork+0x10/0x20 [ 22.096326] [ 22.102812] Allocated by task 246: [ 22.103615] kasan_save_stack+0x3c/0x68 [ 22.104411] kasan_save_track+0x20/0x40 [ 22.105326] kasan_save_alloc_info+0x40/0x58 [ 22.105790] __kasan_kmalloc+0xd4/0xd8 [ 22.106188] __kmalloc_cache_noprof+0x154/0x320 [ 22.106752] kasan_strings+0xb0/0x938 [ 22.107257] kunit_try_run_case+0x170/0x3f0 [ 22.107814] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.108457] kthread+0x24c/0x2d0 [ 22.108960] ret_from_fork+0x10/0x20 [ 22.109425] [ 22.109715] Freed by task 246: [ 22.110133] kasan_save_stack+0x3c/0x68 [ 22.110559] kasan_save_track+0x20/0x40 [ 22.110992] kasan_save_free_info+0x4c/0x78 [ 22.111662] __kasan_slab_free+0x6c/0x98 [ 22.111963] kfree+0x110/0x3b8 [ 22.112218] kasan_strings+0x128/0x938 [ 22.112900] kunit_try_run_case+0x170/0x3f0 [ 22.113490] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.114131] kthread+0x24c/0x2d0 [ 22.114625] ret_from_fork+0x10/0x20 [ 22.115473] [ 22.115947] The buggy address belongs to the object at fff00000c6cfdcc0 [ 22.115947] which belongs to the cache kmalloc-32 of size 32 [ 22.116967] The buggy address is located 16 bytes inside of [ 22.116967] freed 32-byte region [fff00000c6cfdcc0, fff00000c6cfdce0) [ 22.117767] [ 22.118103] The buggy address belongs to the physical page: [ 22.118547] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106cfd [ 22.119773] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.120418] page_type: f5(slab) [ 22.120696] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 22.121418] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 22.122021] page dumped because: kasan: bad access detected [ 22.122645] [ 22.122936] Memory state around the buggy address: [ 22.123741] fff00000c6cfdb80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 22.124317] fff00000c6cfdc00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 22.124854] >fff00000c6cfdc80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 22.125671] ^ [ 22.126176] fff00000c6cfdd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.126945] fff00000c6cfdd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.128356] ==================================================================
[ 14.026853] ================================================================== [ 14.027296] BUG: KASAN: slab-use-after-free in strchr+0x9c/0xc0 [ 14.027626] Read of size 1 at addr ffff888102632890 by task kunit_try_catch/264 [ 14.027869] [ 14.027957] CPU: 0 UID: 0 PID: 264 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 14.028000] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.028012] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.028032] Call Trace: [ 14.028044] <TASK> [ 14.028060] dump_stack_lvl+0x73/0xb0 [ 14.028437] print_report+0xd1/0x640 [ 14.028463] ? __virt_addr_valid+0x1db/0x2d0 [ 14.028488] ? strchr+0x9c/0xc0 [ 14.028506] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.028528] ? strchr+0x9c/0xc0 [ 14.028546] kasan_report+0x140/0x180 [ 14.028568] ? strchr+0x9c/0xc0 [ 14.028591] __asan_report_load1_noabort+0x18/0x20 [ 14.028611] strchr+0x9c/0xc0 [ 14.028630] kasan_strings+0x1b1/0xb60 [ 14.028651] ? __pfx_kasan_strings+0x10/0x10 [ 14.028695] ? __schedule+0xc49/0x27a0 [ 14.028715] ? __pfx_read_tsc+0x10/0x10 [ 14.028734] ? ktime_get_ts64+0x84/0x230 [ 14.028761] kunit_try_run_case+0x1a6/0x480 [ 14.028783] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.028802] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 14.028821] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.028844] ? __kthread_parkme+0x82/0x160 [ 14.028863] ? preempt_count_sub+0x50/0x80 [ 14.028884] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.028903] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.028927] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.028951] kthread+0x257/0x310 [ 14.028968] ? __pfx_kthread+0x10/0x10 [ 14.028986] ret_from_fork+0x41/0x80 [ 14.029005] ? __pfx_kthread+0x10/0x10 [ 14.029022] ret_from_fork_asm+0x1a/0x30 [ 14.029051] </TASK> [ 14.029061] [ 14.034286] Allocated by task 264: [ 14.034521] kasan_save_stack+0x45/0x70 [ 14.034625] kasan_save_track+0x18/0x40 [ 14.034722] kasan_save_alloc_info+0x3b/0x50 [ 14.034816] __kasan_kmalloc+0xb7/0xc0 [ 14.034924] __kmalloc_cache_noprof+0x168/0x350 [ 14.035608] kasan_strings+0xb3/0xb60 [ 14.035874] kunit_try_run_case+0x1a6/0x480 [ 14.036282] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.036546] kthread+0x257/0x310 [ 14.036701] ret_from_fork+0x41/0x80 [ 14.036941] ret_from_fork_asm+0x1a/0x30 [ 14.037387] [ 14.037566] Freed by task 264: [ 14.037691] kasan_save_stack+0x45/0x70 [ 14.037912] kasan_save_track+0x18/0x40 [ 14.038326] kasan_save_free_info+0x3f/0x60 [ 14.038566] __kasan_slab_free+0x56/0x70 [ 14.038688] kfree+0x123/0x3d0 [ 14.038773] kasan_strings+0x13a/0xb60 [ 14.038861] kunit_try_run_case+0x1a6/0x480 [ 14.038949] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.039333] kthread+0x257/0x310 [ 14.039538] ret_from_fork+0x41/0x80 [ 14.039640] ret_from_fork_asm+0x1a/0x30 [ 14.039875] [ 14.039980] The buggy address belongs to the object at ffff888102632880 [ 14.039980] which belongs to the cache kmalloc-32 of size 32 [ 14.040318] The buggy address is located 16 bytes inside of [ 14.040318] freed 32-byte region [ffff888102632880, ffff8881026328a0) [ 14.040725] [ 14.040799] The buggy address belongs to the physical page: [ 14.040963] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102632 [ 14.041173] flags: 0x200000000000000(node=0|zone=2) [ 14.041376] page_type: f5(slab) [ 14.041509] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.041863] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 14.042112] page dumped because: kasan: bad access detected [ 14.042225] [ 14.042279] Memory state around the buggy address: [ 14.042376] ffff888102632780: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.042505] ffff888102632800: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.042774] >ffff888102632880: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 14.043039] ^ [ 14.043432] ffff888102632900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.043750] ffff888102632980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.044124] ==================================================================