Date
June 2, 2025, 2:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.129932] ================================================================== [ 22.130711] BUG: KASAN: slab-use-after-free in strrchr+0x6c/0x78 [ 22.131343] Read of size 1 at addr fff00000c6cfdcd0 by task kunit_try_catch/246 [ 22.131794] [ 22.132131] CPU: 0 UID: 0 PID: 246 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 22.132269] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.132333] Hardware name: linux,dummy-virt (DT) [ 22.132406] Call trace: [ 22.132455] dump_backtrace+0x9c/0x128 [ 22.132555] show_stack+0x20/0x38 [ 22.132623] dump_stack_lvl+0x8c/0xd0 [ 22.132700] print_report+0x118/0x5f0 [ 22.132784] kasan_report+0xdc/0x128 [ 22.132865] __asan_report_load1_noabort+0x20/0x30 [ 22.132949] strrchr+0x6c/0x78 [ 22.133025] kasan_strings+0x1f0/0x938 [ 22.133105] kunit_try_run_case+0x170/0x3f0 [ 22.133186] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.133327] kthread+0x24c/0x2d0 [ 22.133411] ret_from_fork+0x10/0x20 [ 22.133507] [ 22.140339] Allocated by task 246: [ 22.140582] kasan_save_stack+0x3c/0x68 [ 22.140843] kasan_save_track+0x20/0x40 [ 22.141072] kasan_save_alloc_info+0x40/0x58 [ 22.142473] __kasan_kmalloc+0xd4/0xd8 [ 22.142947] __kmalloc_cache_noprof+0x154/0x320 [ 22.143564] kasan_strings+0xb0/0x938 [ 22.144057] kunit_try_run_case+0x170/0x3f0 [ 22.144404] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.144818] kthread+0x24c/0x2d0 [ 22.145256] ret_from_fork+0x10/0x20 [ 22.145738] [ 22.146020] Freed by task 246: [ 22.146450] kasan_save_stack+0x3c/0x68 [ 22.146966] kasan_save_track+0x20/0x40 [ 22.147817] kasan_save_free_info+0x4c/0x78 [ 22.148364] __kasan_slab_free+0x6c/0x98 [ 22.148968] kfree+0x110/0x3b8 [ 22.149533] kasan_strings+0x128/0x938 [ 22.150105] kunit_try_run_case+0x170/0x3f0 [ 22.150651] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.151368] kthread+0x24c/0x2d0 [ 22.151650] ret_from_fork+0x10/0x20 [ 22.152643] [ 22.152983] The buggy address belongs to the object at fff00000c6cfdcc0 [ 22.152983] which belongs to the cache kmalloc-32 of size 32 [ 22.154384] The buggy address is located 16 bytes inside of [ 22.154384] freed 32-byte region [fff00000c6cfdcc0, fff00000c6cfdce0) [ 22.155369] [ 22.155692] The buggy address belongs to the physical page: [ 22.156605] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106cfd [ 22.157147] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.157863] page_type: f5(slab) [ 22.158440] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 22.160021] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 22.160897] page dumped because: kasan: bad access detected [ 22.161358] [ 22.161595] Memory state around the buggy address: [ 22.162029] fff00000c6cfdb80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 22.162636] fff00000c6cfdc00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 22.163568] >fff00000c6cfdc80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 22.164358] ^ [ 22.165131] fff00000c6cfdd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.165716] fff00000c6cfdd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.166612] ==================================================================
[ 14.046344] ================================================================== [ 14.046532] BUG: KASAN: slab-use-after-free in strrchr+0x64/0x70 [ 14.046678] Read of size 1 at addr ffff888102632890 by task kunit_try_catch/264 [ 14.046909] [ 14.047024] CPU: 0 UID: 0 PID: 264 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 14.047074] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.047087] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.047108] Call Trace: [ 14.047120] <TASK> [ 14.047134] dump_stack_lvl+0x73/0xb0 [ 14.047157] print_report+0xd1/0x640 [ 14.047179] ? __virt_addr_valid+0x1db/0x2d0 [ 14.047200] ? strrchr+0x64/0x70 [ 14.047219] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.047240] ? strrchr+0x64/0x70 [ 14.047258] kasan_report+0x140/0x180 [ 14.047279] ? strrchr+0x64/0x70 [ 14.047302] __asan_report_load1_noabort+0x18/0x20 [ 14.047321] strrchr+0x64/0x70 [ 14.047340] kasan_strings+0x24c/0xb60 [ 14.047360] ? __pfx_kasan_strings+0x10/0x10 [ 14.047380] ? __schedule+0xc49/0x27a0 [ 14.047398] ? __pfx_read_tsc+0x10/0x10 [ 14.047415] ? ktime_get_ts64+0x84/0x230 [ 14.047440] kunit_try_run_case+0x1a6/0x480 [ 14.047459] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.047477] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 14.047496] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.047518] ? __kthread_parkme+0x82/0x160 [ 14.047535] ? preempt_count_sub+0x50/0x80 [ 14.047556] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.047574] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.047597] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.047620] kthread+0x257/0x310 [ 14.047637] ? __pfx_kthread+0x10/0x10 [ 14.047655] ret_from_fork+0x41/0x80 [ 14.047700] ? __pfx_kthread+0x10/0x10 [ 14.047719] ret_from_fork_asm+0x1a/0x30 [ 14.047747] </TASK> [ 14.047758] [ 14.052105] Allocated by task 264: [ 14.052249] kasan_save_stack+0x45/0x70 [ 14.052382] kasan_save_track+0x18/0x40 [ 14.052513] kasan_save_alloc_info+0x3b/0x50 [ 14.052708] __kasan_kmalloc+0xb7/0xc0 [ 14.052794] __kmalloc_cache_noprof+0x168/0x350 [ 14.052887] kasan_strings+0xb3/0xb60 [ 14.052968] kunit_try_run_case+0x1a6/0x480 [ 14.053067] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.053177] kthread+0x257/0x310 [ 14.053251] ret_from_fork+0x41/0x80 [ 14.053331] ret_from_fork_asm+0x1a/0x30 [ 14.053452] [ 14.053542] Freed by task 264: [ 14.053728] kasan_save_stack+0x45/0x70 [ 14.053958] kasan_save_track+0x18/0x40 [ 14.054202] kasan_save_free_info+0x3f/0x60 [ 14.054438] __kasan_slab_free+0x56/0x70 [ 14.054653] kfree+0x123/0x3d0 [ 14.054855] kasan_strings+0x13a/0xb60 [ 14.055067] kunit_try_run_case+0x1a6/0x480 [ 14.055306] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.055472] kthread+0x257/0x310 [ 14.055574] ret_from_fork+0x41/0x80 [ 14.055658] ret_from_fork_asm+0x1a/0x30 [ 14.055754] [ 14.055802] The buggy address belongs to the object at ffff888102632880 [ 14.055802] which belongs to the cache kmalloc-32 of size 32 [ 14.055985] The buggy address is located 16 bytes inside of [ 14.055985] freed 32-byte region [ffff888102632880, ffff8881026328a0) [ 14.056483] [ 14.056584] The buggy address belongs to the physical page: [ 14.056857] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102632 [ 14.057185] flags: 0x200000000000000(node=0|zone=2) [ 14.057401] page_type: f5(slab) [ 14.057537] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.057734] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 14.057861] page dumped because: kasan: bad access detected [ 14.057977] [ 14.058033] Memory state around the buggy address: [ 14.058313] ffff888102632780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.058692] ffff888102632800: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.058936] >ffff888102632880: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 14.059193] ^ [ 14.059327] ffff888102632900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.059451] ffff888102632980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.059679] ==================================================================