ci2 starts bisection 2023-06-30 23:00:22.413374328 +0000 UTC m=+26161.141881296 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 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 3008fe3ffd679400e5fcb02d0291cc1fddced78cef884543ecef2c94225ffc99 run #0: crashed: kernel BUG in ext4_writepages run #1: crashed: kernel BUG in ext4_writepages run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: kernel BUG in ext4_writepages run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: kernel BUG in ext4_writepages run #6: crashed: INFO: rcu detected stall in corrupted run #7: crashed: kernel BUG in ext4_writepages 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: kernel BUG in ext4_writepages run #15: crashed: kernel BUG in ext4_writepages 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 testing current HEAD a1c449d00ff8ce2c5fcea5f755df682d1f6bc2ef testing commit a1c449d00ff8ce2c5fcea5f755df682d1f6bc2ef gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e8f7a6b105a7cc53403109d7ffa736d38674ecf17461b2710436e68b6e05f729 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: crashed: kernel BUG in ext4_writepages crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 56m23.080479901s (build: 40m25.7493703s, test: 14m38.699087363s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Linux 6.1.36 crash: kernel BUG in ext4_writepages ------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2746! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 6.1.36-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Workqueue: writeback wb_workfn (flush-7:1) RIP: 0010:ext4_writepages+0x3610/0x3620 fs/ext4/inode.c:2745 Code: 10 00 00 48 c7 c7 a0 9b 09 8c 4c 89 f2 e8 b8 ff eb 01 48 ba 00 00 00 00 00 fc ff df e9 fd d0 ff ff 0f 0b e8 c2 a1 72 07 0f 0b <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 57 41 56 41 54 RSP: 0018:ffffc900000e6f80 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: ffff888071cc64a0 RCX: 1ffff1100e398c94 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888071cc64a0 RBP: ffffc900000e7370 R08: dffffc0000000000 R09: ffffed100e398c95 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: ffffc900000e7710 R14: ffff88807de5e000 R15: ffffc900000e7240 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555ed4708 CR3: 000000007c68a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_writepages+0x33c/0x5d0 mm/page-writeback.c:2469 __writeback_single_inode+0xfb/0xc70 fs/fs-writeback.c:1590 writeback_sb_inodes+0x893/0x1620 fs/fs-writeback.c:1881 wb_writeback+0x3b8/0xa80 fs/fs-writeback.c:2055 wb_do_writeback fs/fs-writeback.c:2198 [inline] wb_workfn+0x3da/0xe40 fs/fs-writeback.c:2238 process_one_work+0x7be/0xf30 kernel/workqueue.c:2289 worker_thread+0x8c5/0xfc0 kernel/workqueue.c:2436 kthread+0x22a/0x2a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_writepages+0x3610/0x3620 fs/ext4/inode.c:2745 Code: 10 00 00 48 c7 c7 a0 9b 09 8c 4c 89 f2 e8 b8 ff eb 01 48 ba 00 00 00 00 00 fc ff df e9 fd d0 ff ff 0f 0b e8 c2 a1 72 07 0f 0b <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 57 41 56 41 54 RSP: 0018:ffffc900000e6f80 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: ffff888071cc64a0 RCX: 1ffff1100e398c94 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888071cc64a0 RBP: ffffc900000e7370 R08: dffffc0000000000 R09: ffffed100e398c95 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: ffffc900000e7710 R14: ffff88807de5e000 R15: ffffc900000e7240 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fefc2ba8000 CR3: 000000007e014000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400