ci2 starts bisection 2023-01-31 05:53:47.786990118 +0000 UTC m=+70131.840049946 bisecting fixing commit since 4ec71a9ec7698108e0ad7d59ef41df064cc72049 building syzkaller on f4470a7b5efeb021c66c8fb38656bcb2b1597974 ensuring issue is reproducible on original commit 4ec71a9ec7698108e0ad7d59ef41df064cc72049 testing commit 4ec71a9ec7698108e0ad7d59ef41df064cc72049 gcc compiler: Debian clang version 13.0.1-6~deb11u1, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 36bb2054dfe8574fc49da7dbe439556bda6effbe37a2c0b55b4ede10459dc17a run #0: crashed: kernel BUG in ext4_writepages run #1: crashed: kernel BUG in __ext4_journal_stop run #2: crashed: kernel BUG in __ext4_journal_stop run #3: crashed: kernel BUG in ext4_writepages run #4: crashed: kernel BUG in __ext4_journal_stop run #5: crashed: kernel BUG in __ext4_journal_stop run #6: crashed: kernel BUG in __ext4_journal_stop run #7: crashed: kernel BUG in ext4_writepages run #8: crashed: kernel BUG in ext4_writepages run #9: crashed: kernel BUG in __ext4_journal_stop run #10: crashed: kernel BUG in ext4_writepages run #11: crashed: kernel BUG in __ext4_journal_stop run #12: crashed: kernel BUG in ext4_writepages run #13: crashed: kernel BUG in __ext4_journal_stop run #14: crashed: kernel BUG in ext4_writepages run #15: crashed: kernel BUG in __ext4_journal_stop run #16: crashed: kernel BUG in __ext4_journal_stop run #17: crashed: kernel BUG in __ext4_journal_stop run #18: crashed: kernel BUG in ext4_writepages run #19: crashed: kernel BUG in ext4_writepages testing current HEAD bfbd2237c1861a6580673946c1633d3533184659 testing commit bfbd2237c1861a6580673946c1633d3533184659 gcc compiler: Debian clang version 13.0.1-6~deb11u1, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 8e55f6f4a7271d07cf72043344c2bcad35148aa4f8cef92351ffb13bdfb397bc 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_journal_stop run #7: crashed: kernel BUG in ext4_writepages run #8: crashed: kernel BUG in __ext4_journal_stop run #9: crashed: kernel BUG in ext4_writepages revisions tested: 2, total time: 16m52.616699941s (build: 9m13.339151807s, test: 5m45.336914179s) the crash still happens on HEAD commit msg: Merge 5.15.83 into android13-5.15-lts crash: kernel BUG in ext4_writepages ------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2738! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 399 Comm: kworker/u4:3 Not tainted 5.15.83-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: writeback wb_workfn (flush-7:0) RIP: 0010:ext4_writepages+0x3528/0x3530 fs/ext4/inode.c:2737 Code: 4c 24 10 45 89 f0 e8 67 31 07 00 65 ff 0d 98 7f 33 7e 4c 8b bc 24 b0 00 00 00 0f 85 c1 fa ff ff e8 05 81 31 ff e9 b7 fa ff ff <0f> 0b 66 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb be 08 00 00 00 e8 RSP: 0018:ffffc90000767040 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: ffff888109342f10 RCX: 1ffff110212685e2 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 RBP: ffffc90000767430 R08: dffffc0000000000 R09: ffffed10212685e3 R10: ffffed10212685e3 R11: 1ffff110212685e2 R12: ffffc900007677f0 R13: ffffc90000767300 R14: ffff88810e618000 R15: ffff88810e5ba000 FS: 0000000000000000(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555b94728 CR3: 000000010c5e4000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_writepages+0x435/0x6b0 mm/page-writeback.c:2366 __writeback_single_inode+0xa5/0x4f0 fs/fs-writeback.c:1622 writeback_sb_inodes+0x91d/0x16c0 fs/fs-writeback.c:1905 wb_writeback+0x3a8/0x850 fs/fs-writeback.c:2079 wb_do_writeback+0x211/0xa70 fs/fs-writeback.c:2222 wb_workfn+0xe4/0x310 fs/fs-writeback.c:2263 process_one_work+0x6bc/0xb40 kernel/workqueue.c:2313 worker_thread+0x90b/0xfe0 kernel/workqueue.c:2460 kthread+0x39c/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Modules linked in: ---[ end trace 2191a51f42fdb2d0 ]--- RIP: 0010:ext4_writepages+0x3528/0x3530 fs/ext4/inode.c:2737 Code: 4c 24 10 45 89 f0 e8 67 31 07 00 65 ff 0d 98 7f 33 7e 4c 8b bc 24 b0 00 00 00 0f 85 c1 fa ff ff e8 05 81 31 ff e9 b7 fa ff ff <0f> 0b 66 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb be 08 00 00 00 e8 RSP: 0018:ffffc90000767040 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: ffff888109342f10 RCX: 1ffff110212685e2 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 RBP: ffffc90000767430 R08: dffffc0000000000 R09: ffffed10212685e3 R10: ffffed10212685e3 R11: 1ffff110212685e2 R12: ffffc900007677f0 R13: ffffc90000767300 R14: ffff88810e618000 R15: ffff88810e5ba000 FS: 0000000000000000(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b9d355f168 CR3: 000000010c3e6000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400