bisecting fixing commit since 42226c989789d8da4af1de0c31070c96726d990c
building syzkaller on 744a39e220cece33e207035facce6c5ae161b775
testing commit 42226c989789d8da4af1de0c31070c96726d990c
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 7df416375d9d05b7feb7217f2ec6b90820e97653225e7a7250019e9d19e85b4b
all runs: crashed: INFO: task hung in __xfs_buf_submit
testing current HEAD 9b59ec8d50a1f28747ceff9a4f39af5deba9540e
testing commit 9b59ec8d50a1f28747ceff9a4f39af5deba9540e
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 9a7ee41642d33c18e0c7d98d24831f0fa37de9a57faf202d7953eb9760e6d684
run #0: crashed: SYZFATAL: executor failed NUM times: executor NUM: exit status NUM
run #1: crashed: INFO: task hung in __xfs_buf_submit
run #2: crashed: INFO: task hung in __xfs_buf_submit
run #3: crashed: INFO: task hung in __xfs_buf_submit
run #4: crashed: INFO: task hung in __xfs_buf_submit
run #5: crashed: INFO: task hung in __xfs_buf_submit
run #6: crashed: INFO: task hung in __xfs_buf_submit
run #7: crashed: INFO: task hung in __xfs_buf_submit
run #8: crashed: INFO: task hung in __xfs_buf_submit
run #9: crashed: INFO: task hung in __xfs_buf_submit
revisions tested: 2, total time: 26m31.224509766s (build: 13m40.603312945s, test: 12m17.124082595s)
the crash still happens on HEAD
commit msg: Merge tag 'riscv-for-linus-5.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
crash: INFO: task hung in __xfs_buf_submit
INFO: task syz-executor.0:4117 blocked for more than 143 seconds.
      Not tainted 5.19.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:27488 pid: 4117 ppid:  4098 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5146 [inline]
 __schedule+0x9cd/0x4b20 kernel/sched/core.c:6458
 schedule+0xd2/0x1f0 kernel/sched/core.c:6530
 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1911
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x378/0x530 kernel/sched/completion.c:106
 xfs_buf_iowait+0x8e/0x420 fs/xfs/xfs_buf.c:1577
 __xfs_buf_submit+0x389/0x660 fs/xfs/xfs_buf.c:1657
 xfs_buf_submit fs/xfs/xfs_buf.c:59 [inline]
 xfs_buf_read_uncached+0x1bd/0x320 fs/xfs/xfs_buf.c:891
 xfs_readsb+0x2a9/0x560 fs/xfs/xfs_mount.c:179
 xfs_fs_fill_super+0x683/0x1970 fs/xfs/xfs_super.c:1506
 get_tree_bdev+0x398/0x680 fs/super.c:1292
 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497
 do_new_mount fs/namespace.c:3040 [inline]
 path_mount+0x7e8/0x1a40 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6e7c4890e9
RSP: 002b:00007f6e7d512168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6e7c59bf60 RCX: 00007f6e7c4890e9
RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0
RBP: 00007f6e7c4e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000008002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd6d5c4aef R14: 00007f6e7d512300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.19.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x140/0x170 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0x88c/0xbf0 kernel/hung_task.c:369
 kthread+0x299/0x340 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x156/0x1b0 drivers/acpi/processor_idle.c:554