ci2 starts bisection 2023-04-26 05:38:33.056720168 +0000 UTC m=+60611.353995083 bisecting fixing commit since 115472395b0a9ea522ba0e106d6dfd7a73df8ba6 building syzkaller on fbf0499acc828df26995835e51d83c3a0117e716 ensuring issue is reproducible on original commit 115472395b0a9ea522ba0e106d6dfd7a73df8ba6 testing commit 115472395b0a9ea522ba0e106d6dfd7a73df8ba6 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 9045695e87ab7d7c39b7916b0402e2e9ce9cd60e1615794e1b09c63a9c331cd6 all runs: crashed: kernel BUG in ext4_writepages testing current HEAD 3299fb36854fdc288bddc2c4d265f8a2e5105944 testing commit 3299fb36854fdc288bddc2c4d265f8a2e5105944 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: b13ec3aa25af6038aad3189ccbb9b2ab8fb22539ea1b141deddffbfebbedbb77 all runs: crashed: kernel BUG in ext4_writepages revisions tested: 2, total time: 39m30.57170843s (build: 26m48.552615856s, test: 12m9.434814857s) the crash still happens on HEAD commit msg: Linux 5.15.108 crash: kernel BUG in ext4_writepages ------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2732! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 154 Comm: kworker/u4:2 Not tainted 5.15.108-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Workqueue: writeback wb_workfn (flush-7:0) RIP: 0010:ext4_writepages+0x2fc8/0x2fd0 fs/ext4/inode.c:2731 Code: 3e 4c a8 ff 0f 0b 0f 0b be 00 10 00 00 48 c7 c7 c0 56 a6 8b 4c 89 f2 e8 e6 07 d2 01 e9 5a d6 ff ff 0f 0b e8 9a 80 2b 07 0f 0b <0f> 0b 66 0f 1f 44 00 00 41 57 41 56 53 48 89 fb 49 bf 00 00 00 00 RSP: 0018:ffffc90001fbefa0 EFLAGS: 00010247 RAX: 1ffff1100dc01784 RBX: ffff88806e00bc20 RCX: ffffffff81f6b550 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88806e00bc20 RBP: ffffc90001fbf390 R08: dffffc0000000000 R09: ffffed100dc01785 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffffc90001fbf730 R14: ffff88806e00be70 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555557302848 CR3: 0000000022007000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_writepages+0x406/0x680 mm/page-writeback.c:2364 __writeback_single_inode+0xdc/0x8b0 fs/fs-writeback.c:1622 writeback_sb_inodes+0x915/0x1700 fs/fs-writeback.c:1905 wb_writeback+0x37f/0x8e0 fs/fs-writeback.c:2079 wb_do_writeback fs/fs-writeback.c:2222 [inline] wb_workfn+0x3dc/0xe50 fs/fs-writeback.c:2263 process_one_work+0x799/0xe10 kernel/workqueue.c:2306 worker_thread+0x8f2/0xfb0 kernel/workqueue.c:2453 kthread+0x3a8/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Modules linked in: ---[ end trace f9c015753f4924de ]--- RIP: 0010:ext4_writepages+0x2fc8/0x2fd0 fs/ext4/inode.c:2731 Code: 3e 4c a8 ff 0f 0b 0f 0b be 00 10 00 00 48 c7 c7 c0 56 a6 8b 4c 89 f2 e8 e6 07 d2 01 e9 5a d6 ff ff 0f 0b e8 9a 80 2b 07 0f 0b <0f> 0b 66 0f 1f 44 00 00 41 57 41 56 53 48 89 fb 49 bf 00 00 00 00 RSP: 0018:ffffc90001fbefa0 EFLAGS: 00010247 RAX: 1ffff1100dc01784 RBX: ffff88806e00bc20 RCX: ffffffff81f6b550 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88806e00bc20 RBP: ffffc90001fbf390 R08: dffffc0000000000 R09: ffffed100dc01785 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffffc90001fbf730 R14: ffff88806e00be70 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d459785950 CR3: 00000000227bf000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400