Hao Sun <sunhao.th@xxxxxxxxx> 于2021年9月13日周一 上午10:10写道： > > Hello, > > When using Healer to fuzz the latest Linux kernel, the following crash > was triggered. > > HEAD commit: 4b93c544e90e-thunderbolt: test: split up test cases > git tree: upstream > console output: > https://drive.google.com/file/d/1maGu7OQMMnheEq18g-XJRrSvPIRLyIae/view?usp=sharing > kernel config: https://drive.google.com/file/d/1c0u2EeRDhRO-ZCxr9MP2VvAtJd6kfg-p/view?usp=sharing > C reproducer: https://drive.google.com/file/d/1pf2nzNzl2hUxO6EJ1Vp4uqeAmr9tG4Pw/view?usp=sharing > Syzlang reproducer: > https://drive.google.com/file/d/1CZekMFes8O7FmLULOkxLnovMGWNFtI47/view?usp=sharing > Similar report: > https://groups.google.com/g/syzkaller-bugs/c/mt4E4qKbC5c/m/m-gbLPjIAgAJ > > If you fix this issue, please add the following tag to the commit: > Reported-by: Hao Sun <sunhao.th@xxxxxxxxx> > Hi This crash can still be triggered with the same C reproducer on the latest kernel. HEAD commit: 6880fa6c5660 Linux 5.15-rc1 git tree: upstream kernel config: https://drive.google.com/file/d/1c0u2EeRDhRO-ZCxr9MP2VvAtJd6kfg-p/view?usp=sharing nbd0: detected capacity change from 0 to 18 block nbd0: shutting down sockets block nbd0: Possible stuck request ffff888018830000: control (read@0,4096B). Runtime 30 seconds block nbd0: Possible stuck request ffff888018830000: control (read@0,4096B). Runtime 60 seconds block nbd0: Possible stuck request ffff888018830000: control (read@0,4096B). Runtime 90 seconds block nbd0: Possible stuck request ffff888018830000: control (read@0,4096B). Runtime 120 seconds block nbd0: Possible stuck request ffff888018830000: control (read@0,4096B). Runtime 150 seconds INFO: task a.out:6658 blocked for more than 143 seconds. Not tainted 5.15.0-rc1 #2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:a.out state:D stack:27280 pid: 6658 ppid: 6657 flags:0x00004002 Call Trace: __schedule+0xcd9/0x2530 ? firmware_map_remove+0x1a0/0x1a0 schedule+0xd3/0x270 schedule_preempt_disabled+0xf/0x20 __mutex_lock+0xc96/0x1680 ? blkdev_put+0x98/0x6f0 ? mutex_lock_io_nested+0x1470/0x1470 ? do_raw_spin_unlock+0x171/0x260 ? blkdev_put+0x98/0x6f0 blkdev_put+0x98/0x6f0 blkdev_close+0x8d/0xb0 __fput+0x288/0x9f0 ? blkdev_fsync+0xd0/0xd0 task_work_run+0xe0/0x1a0 do_exit+0xbbe/0x2dd0 ? preempt_schedule_common+0x5e/0xc0 ? mm_update_next_owner+0x7a0/0x7a0 ? preempt_schedule_thunk+0x16/0x18 do_group_exit+0x125/0x340 __x64_sys_exit_group+0x3a/0x50 do_syscall_64+0x35/0xb0 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe9d6949618 RSP: 002b:00007ffffdd5e678 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe9d6949618 RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 RBP: 00007fe9d6c268e0 R08: 00000000000000e7 R09: ffffffffffffff98 R10: 00007fe9d6e48260 R11: 0000000000000246 R12: 00007fe9d6c268e0 R13: 00007fe9d6c2bc20 R14: 0000000000000000 R15: 0000000000000000 INFO: task systemd-udevd:6665 blocked for more than 143 seconds. Not tainted 5.15.0-rc1 #2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:26352 pid: 6665 ppid: 2993 flags:0x00004000 Call Trace: __schedule+0xcd9/0x2530 ? firmware_map_remove+0x1a0/0x1a0 ? preempt_schedule_common+0x5e/0xc0 schedule+0xd3/0x270 io_schedule+0x17/0x70 wait_on_page_bit_common+0x57c/0xf10 ? filemap_get_read_batch+0xe50/0xe50 ? end_buffer_async_write+0x5d0/0x5d0 ? __filemap_set_wb_err+0x240/0x240 ? __sanitizer_cov_trace_pc+0x1a/0x40 ? __page_cache_alloc+0x110/0x3d0 ? enable_ptr_key_workfn+0x30/0x30 do_read_cache_page+0x911/0x1440 read_part_sector+0xfa/0x610 ? adfspart_check_ADFS+0x830/0x830 adfspart_check_ICS+0x9d/0xc90 ? pointer+0x810/0x810 ? __alloc_pages+0x526/0x6e0 ? __sanitizer_cov_trace_pc+0x1a/0x40 ? __vmalloc_node_range+0x4aa/0x940 ? adfspart_check_ADFS+0x830/0x830 ? snprintf+0xbb/0xf0 ? vsprintf+0x30/0x30 ? __sanitizer_cov_trace_pc+0x1a/0x40 ? adfspart_check_ADFS+0x830/0x830 bdev_disk_changed+0x778/0x1140 blkdev_get_whole+0x206/0x270 blkdev_get_by_dev+0x456/0x900 blkdev_open+0x154/0x2b0 do_dentry_open+0x4c8/0x11d0 ? blkdev_close+0xb0/0xb0 path_openat+0x1c99/0x2710 ? path_lookupat.isra.0+0x580/0x580 ? lockdep_hardirqs_on_prepare+0x400/0x400 do_filp_open+0x1c1/0x290 ? may_open_dev+0xf0/0xf0 ? do_raw_spin_lock+0x120/0x2d0 ? rwlock_bug.part.0+0x90/0x90 ? __phys_addr_symbol+0x2c/0x70 ? __sanitizer_cov_trace_pc+0x1a/0x40 ? _find_next_bit+0x1e3/0x260 ? _raw_spin_unlock+0x24/0x40 ? alloc_fd+0x4bd/0x660 do_sys_openat2+0x61b/0x9a0 ? rcu_read_lock_bh_held+0x14/0xb0 ? file_open_root+0x430/0x430 ? seccomp_notify_ioctl+0xdb0/0xdb0 do_sys_open+0xc3/0x140 ? filp_open+0x70/0x70 ? __sanitizer_cov_trace_pc+0x1a/0x40 ? __secure_computing+0x104/0x360 do_syscall_64+0x35/0xb0 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f8efe051840 RSP: 002b:00007ffef9fe31a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055a1992dd370 RCX: 00007f8efe051840 RDX: 000055a197b1afe3 RSI: 00000000000a0800 RDI: 000055a1992d1260 RBP: 00007ffef9fe3320 R08: 000055a197b1a670 R09: 0000000000000010 R10: 00007f8efddcbd70 R11: 0000000000000246 R12: 00007ffef9fe3270 R13: 000055a1992d4c20 R14: 0000000000000003 R15: 000000000000000e Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8b97e9a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 1 lock held by in:imklog/6245: #0: ffff888107d06370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 1 lock held by a.out/6658: #0: ffff8880187f2118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x98/0x6f0 1 lock held by systemd-udevd/6665: #0: ffff8880187f2118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x3c1/0x900 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 5.15.0-rc1 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Call Trace: dump_stack_lvl+0xcd/0x134 nmi_cpu_backtrace.cold+0x47/0x144 ? lapic_can_unplug_cpu+0x80/0x80 nmi_trigger_cpumask_backtrace+0x1e1/0x220 watchdog+0xcc8/0x1010 ? reset_hung_task_detector+0x30/0x30 kthread+0x3e5/0x4d0 ? set_kthread_struct+0x130/0x130 ret_from_fork+0x1f/0x30 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2986 Comm: systemd-journal Not tainted 5.15.0-rc1 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:do_faccessat+0x2/0x850 Code: 84 00 00 00 25 e3 7f ff ff 0d 00 00 20 00 89 83 84 00 00 00 31 c0 5b c3 e8 2b 99 f5 ff eb df 66 0f 1f 84 00 00 00 00 00 41 57 <41> 56 41 55 41 54 55 89 cd 53 89 d3 48 83 c4 80 41 89 dc 48 8d 44 RSP: 0018:ffffc9000185ff30 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00005560fae709a3 RDI: 00000000ffffff9c RBP: ffffc9000185ff48 R08: ffffffff81c88ffd R09: 0000000000000000 R10: 0000000000000001 R11: ffffed1003425582 R12: ffffc9000185ff58 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f792748f8c0(0000) GS:ffff888135c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f79247d3000 CR3: 0000000107cde000 CR4: 0000000000350ee0 Call Trace: do_syscall_64+0x35/0xb0 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f792674b9c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffe4c6ab808 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffe4c6ae720 RCX: 00007f792674b9c7 RDX: 00007f79271bca00 RSI: 0000000000000000 RDI: 00005560fae709a3 RBP: 00007ffe4c6ab840 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffe4c6ae720 R15: 00007ffe4c6abd30 Kernel panic - not syncing: hung_task: blocked tasks CPU: 0 PID: 29 Comm: khungtaskd Not tainted 5.15.0-rc1 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Call Trace: dump_stack_lvl+0xcd/0x134 panic+0x2b0/0x6dd ? print_oops_end_marker.cold+0x15/0x15 ? lapic_can_unplug_cpu+0x80/0x80 ? preempt_schedule_thunk+0x16/0x18 ? watchdog.cold+0x5/0x168 watchdog.cold+0x16/0x168 ? reset_hung_task_detector+0x30/0x30 kthread+0x3e5/0x4d0 ? set_kthread_struct+0x130/0x130 ret_from_fork+0x1f/0x30 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 1 seconds..
