ci2 starts bisection 2023-11-27 13:11:26.089011872 +0000 UTC m=+329710.889604436
bisecting fixing commit since 3b29299e5f604550faf3eff811d6cd60b4c6cae6
building syzkaller on f325deb023e4e2fb9197004be1b3da738680429c
ensuring issue is reproducible on original commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6

testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: df44d1426bff6900863a926aebba9b020e244cc3afbcd278cf913ffbf2398d44
run #0: crashed: kernel BUG in ext4_writepages
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: kernel BUG in ext4_writepages
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_writepages
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: kernel BUG in ext4_writepages
run #17: crashed: kernel BUG in ext4_writepages
run #18: crashed: kernel BUG in ext4_writepages
run #19: crashed: kernel BUG in ext4_writepages
representative crash: INFO: rcu detected stall in corrupted, types: [HANG BUG]
check whether we can drop unnecessary instrumentation
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN KASAN], they are not needed
testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 727700c76406033fd67eb52afa1825854a160fb4711ec6caa557deb7fcdc67b6
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: kernel BUG in ext4_writepages
run #8: crashed: kernel BUG in ext4_writepages
run #9: OK
representative crash: INFO: rcu detected stall in corrupted, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [ATOMIC_SLEEP LEAK UBSAN KASAN LOCKDEP], they are not needed
kconfig minimization: base=3820 full=7521 leaves diff=1987
split chunks (needed=false): <1987>
split chunk #0 of len 1987 into 5 parts
testing without sub-chunk 1/5
disabling configs for [UBSAN KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 56a4576e46a8094a851ab14c15338a3cacfbd366515808c5022c5e56d3b9bf85
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: kernel BUG in ext4_writepages
run #4: crashed: kernel BUG in ext4_writepages
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_writepages
run #7: crashed: kernel BUG in ext4_writepages
run #8: crashed: kernel BUG in ext4_writepages
run #9: OK
representative crash: kernel BUG in ext4_writepages, types: [BUG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [UBSAN KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 48239c8151116e1e88b334219799a1c0f0e9430760f1b029cb98af84dee95051
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: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_writepages
run #7: crashed: kernel BUG in ext4_writepages
run #8: OK
run #9: OK
representative crash: INFO: rcu detected stall in corrupted, types: [HANG BUG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN KASAN], they are not needed
testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 74fe500281c61bfd0aca54782b0e819902dd9566b9ad9df4c09f10bd2d1d4644
run #0: crashed: kernel BUG in ext4_writepages
run #1: crashed: kernel BUG in ext4_writepages
run #2: crashed: kernel BUG in ext4_writepages
run #3: crashed: kernel BUG in ext4_writepages
run #4: crashed: kernel BUG in ext4_writepages
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_writepages
run #7: OK
run #8: OK
run #9: OK
representative crash: kernel BUG in ext4_writepages, types: [BUG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 31bc898fe3197e7ceb585dbefd28020baec50279686d0ea24a944a91a3d4e468
run #0: crashed: kernel BUG in ext4_writepages
run #1: crashed: kernel BUG in ext4_writepages
run #2: crashed: kernel BUG in ext4_writepages
run #3: crashed: kernel BUG in ext4_writepages
run #4: crashed: kernel BUG in ext4_writepages
run #5: OK
run #6: crashed: kernel BUG in ext4_writepages
run #7: crashed: kernel BUG in ext4_writepages
run #8: OK
run #9: OK
representative crash: kernel BUG in ext4_writepages, types: [BUG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [UBSAN KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 30e65c8b5ded25223bbfabe1f2638cef0a2c7590dee717a706a5212ad4936f17
run #0: crashed: kernel BUG in ext4_writepages
run #1: crashed: kernel BUG in ext4_writepages
run #2: crashed: kernel BUG in ext4_writepages
run #3: crashed: kernel BUG in ext4_writepages
run #4: crashed: kernel BUG in ext4_writepages
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_writepages
run #7: OK
run #8: OK
run #9: OK
representative crash: kernel BUG in ext4_writepages, types: [BUG]
the chunk can be dropped
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing current HEAD 69e434a1cb2146a70062d89d507b6132fa38bfe1
testing commit 69e434a1cb2146a70062d89d507b6132fa38bfe1 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 01f63f681e81e3648b4d157580bffc7f60e06e7faf1cc10eeca8561ad6e759f2
run #0: crashed: kernel BUG in ext4_writepages
run #1: crashed: kernel BUG in ext4_writepages
run #2: crashed: kernel BUG in ext4_writepages
run #3: crashed: kernel BUG in ext4_writepages
run #4: crashed: kernel BUG in ext4_writepages
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_writepages
run #7: crashed: kernel BUG in ext4_writepages
run #8: OK
run #9: crashed: kernel BUG in ext4_writepages
representative crash: kernel BUG in ext4_writepages, types: [BUG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 2h14m25.213238081s (build: 47m54.799340147s, test: 1h23m23.699818883s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.1.63
crash: kernel BUG in ext4_writepages
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2736!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 1073 Comm: kworker/u4:5 Not tainted 6.1.63-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:ext4_writepages+0x1232/0x1240 fs/ext4/inode.c:2735
Code: 24 08 48 8b 54 24 10 89 d9 e8 5a 50 02 00 65 ff 0d 1b ab c9 7e 49 89 ee 0f 85 0a fe ff ff 0f 1f 44 00 00 e9 00 fe ff ff 0f 0b <0f> 0b 0f 0b e9 27 ff ff ff 0f 0b eb 9c 90 48 83 7e 28 00 74 14 48
RSP: 0018:ffffc90000efb938 EFLAGS: 00010207
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffffff82307309 RDI: 0000000000000000
RBP: ffff888114ada890 R08: 0000000000000000 R09: ffffffff8137f39f
R10: 0000000000000000 R11: 0000001000000000 R12: ffffc90000efbb20
R13: ffff888114adaab8 R14: ffff888103bcc000 R15: ffffc90000efbc40
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7fdb90e000 CR3: 0000000103eae000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0xc5/0x210 mm/page-writeback.c:2469
 __writeback_single_inode+0x65/0x490 fs/fs-writeback.c:1612
 writeback_sb_inodes+0x3a4/0x6f0 fs/fs-writeback.c:1903
 wb_writeback+0x18d/0x470 fs/fs-writeback.c:2077
 wb_do_writeback fs/fs-writeback.c:2220 [inline]
 wb_workfn+0x137/0x560 fs/fs-writeback.c:2260
 process_one_work+0x25c/0x4d0 kernel/workqueue.c:2292
 worker_thread+0x240/0x3e0 kernel/workqueue.c:2439
 kthread+0xdd/0x100 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_writepages+0x1232/0x1240 fs/ext4/inode.c:2735
Code: 24 08 48 8b 54 24 10 89 d9 e8 5a 50 02 00 65 ff 0d 1b ab c9 7e 49 89 ee 0f 85 0a fe ff ff 0f 1f 44 00 00 e9 00 fe ff ff 0f 0b <0f> 0b 0f 0b e9 27 ff ff ff 0f 0b eb 9c 90 48 83 7e 28 00 74 14 48
RSP: 0018:ffffc90000efb938 EFLAGS: 00010207
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffffff82307309 RDI: 0000000000000000
RBP: ffff888114ada890 R08: 0000000000000000 R09: ffffffff8137f39f
R10: 0000000000000000 R11: 0000001000000000 R12: ffffc90000efbb20
R13: ffff888114adaab8 R14: ffff888103bcc000 R15: ffffc90000efbc40
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7fdb90e000 CR3: 0000000103eae000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400