ci starts bisection 2023-05-07 02:11:34.351410292 +0000 UTC m=+76124.613062107
bisecting fixing commit since 837c07cf68fec9cad455d5fc86aab5350cc06c53
building syzkaller on be607b78d7dea8ef5a0267ae7396fded7dc016d5
ensuring issue is reproducible on original commit 837c07cf68fec9cad455d5fc86aab5350cc06c53

testing commit 837c07cf68fec9cad455d5fc86aab5350cc06c53 gcc
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 038bc66b48ea4c1a099efff195f46dbd771105de3eafb3c82bfbebca15aed636
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in corrupted
run #10: crashed: INFO: rcu detected stall in corrupted
run #11: crashed: INFO: rcu detected stall in corrupted
run #12: crashed: INFO: rcu detected stall in corrupted
run #13: crashed: INFO: rcu detected stall in corrupted
run #14: crashed: INFO: rcu detected stall in corrupted
run #15: crashed: INFO: rcu detected stall in corrupted
run #16: crashed: INFO: task hung in f2fs_issue_checkpoint
run #17: crashed: INFO: task hung in f2fs_issue_checkpoint
run #18: crashed: INFO: task hung in f2fs_issue_checkpoint
run #19: crashed: INFO: task hung in f2fs_issue_checkpoint
testing current HEAD fc4354c6e5c21257cf4a50b32f7c11c7d65c55b3
testing commit fc4354c6e5c21257cf4a50b32f7c11c7d65c55b3 gcc
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 0da6b7c1cc0df5b298227061ba57e375c3650ecc747cc445cf7ccc2b3e652150
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
crash still not fixed/happens on the oldest tested release
revisions tested: 2, total time: 32m17.328291243s (build: 18m27.754858667s, test: 13m2.12572362s)
crash still not fixed on HEAD or HEAD had kernel test errors
commit msg: Merge tag 'mm-stable-2023-05-06-10-49' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
crash: INFO: task hung in f2fs_issue_checkpoint
INFO: task kworker/u4:1:12 blocked for more than 143 seconds.
      Not tainted 6.3.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:1    state:D
 stack:24304 pid:12    ppid:2      flags:0x00004000
Workqueue: writeback wb_workfn
 (flush-7:1)

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xc25/0x57f0 kernel/sched/core.c:6669
 schedule+0xde/0x1a0 kernel/sched/core.c:6745
 schedule_timeout+0x22d/0x270 kernel/time/timer.c:2143
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
 f2fs_issue_checkpoint+0x254/0x420 fs/f2fs/checkpoint.c:1883
 f2fs_balance_fs_bg+0x463/0xcd0 fs/f2fs/segment.c:513
 f2fs_write_node_pages+0x12d/0x8d0 fs/f2fs/node.c:2110
 do_writepages+0x174/0x5c0 mm/page-writeback.c:2551
 __writeback_single_inode+0xd6/0xa50 fs/fs-writeback.c:1603
 writeback_sb_inodes+0x476/0xc00 fs/fs-writeback.c:1894
 __writeback_inodes_wb+0xb2/0x200 fs/fs-writeback.c:1965
 wb_writeback+0x5a6/0x7a0 fs/fs-writeback.c:2070
 wb_check_old_data_flush fs/fs-writeback.c:2170 [inline]
 wb_do_writeback fs/fs-writeback.c:2223 [inline]
 wb_workfn+0x5cf/0xd00 fs/fs-writeback.c:2251
 process_one_work+0x86e/0x1410 kernel/workqueue.c:2405
 worker_thread+0x5af/0xf00 kernel/workqueue.c:2552
 kthread+0x2ea/0x3c0 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task kworker/u4:3:46 blocked for more than 148 seconds.
      Not tainted 6.3.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:3    state:D
 stack:25720 pid:46    ppid:2      flags:0x00004000
Workqueue: writeback wb_workfn
 (flush-7:2)

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xc25/0x57f0 kernel/sched/core.c:6669
 schedule+0xde/0x1a0 kernel/sched/core.c:6745
 schedule_timeout+0x22d/0x270 kernel/time/timer.c:2143
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
 f2fs_issue_checkpoint+0x254/0x420 fs/f2fs/checkpoint.c:1883
 f2fs_balance_fs_bg+0x463/0xcd0 fs/f2fs/segment.c:513
 f2fs_write_node_pages+0x12d/0x8d0 fs/f2fs/node.c:2110
 do_writepages+0x174/0x5c0 mm/page-writeback.c:2551
 __writeback_single_inode+0xd6/0xa50 fs/fs-writeback.c:1603
 writeback_sb_inodes+0x476/0xc00 fs/fs-writeback.c:1894
 __writeback_inodes_wb+0xb2/0x200 fs/fs-writeback.c:1965
 wb_writeback+0x5a6/0x7a0 fs/fs-writeback.c:2070
 wb_check_old_data_flush fs/fs-writeback.c:2170 [inline]
 wb_do_writeback fs/fs-writeback.c:2223 [inline]
 wb_workfn+0x5cf/0xd00 fs/fs-writeback.c:2251
 process_one_work+0x86e/0x1410 kernel/workqueue.c:2405
 worker_thread+0x5af/0xf00 kernel/workqueue.c:2552
 kthread+0x2ea/0x3c0 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308