bisecting fixing commit since daefdc9eb24bfa11ab77a4b2a9c3923f1051fe0b building syzkaller on 51a9082e064119316893e12187cab2843283ed4d testing commit daefdc9eb24bfa11ab77a4b2a9c3923f1051fe0b with gcc (GCC) 8.1.0 kernel signature: 141c271eda54a5fe2650579fed7b5fbb4e1591bbbd5b60c19839106ddc77ac56 all runs: crashed: kernel BUG at fs/reiserfs/journal.c:LINE! testing current HEAD 4143d798313fffa39f05bf24dd560ace42225c26 testing commit 4143d798313fffa39f05bf24dd560ace42225c26 with gcc (GCC) 8.1.0 kernel signature: 0f037aa150c6cf95a86819deceb62440795ebdab0531e72a9768dd71b86007c5 all runs: crashed: kernel BUG at fs/reiserfs/journal.c:LINE! revisions tested: 2, total time: 23m42.230691026s (build: 16m51.620425562s, test: 6m9.368742693s) the crash still happens on HEAD commit msg: Linux 4.19.165 crash: kernel BUG at fs/reiserfs/journal.c:LINE! REISERFS warning (device loop3): sh-458 journal_init_dev: cannot init journal device 'unknown-block(7,3)': -4 REISERFS (device loop4): Using rupasov hash to sort names REISERFS warning (device loop3): sh-462 journal_init: unable to initialize journal device ------------[ cut here ]------------ REISERFS warning (device loop3): sh-2022 reiserfs_fill_super: unable to initialize journal space kernel BUG at fs/reiserfs/journal.c:3643! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 10936 Comm: syz-executor.4 Not tainted 4.19.165-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_journal_end fs/reiserfs/journal.c:3643 [inline] RIP: 0010:do_journal_end+0x3094/0x4400 fs/reiserfs/journal.c:4040 Code: 5d c8 4c 89 f6 48 89 df e8 e9 f9 fe ff ba 01 00 00 00 4c 89 f6 48 89 df e8 f9 16 ff ff e9 98 fa ff ff 0f 0b 0f 0b 0f 0b 0f 0b <0f> 0b 0f 0b 0f 0b 48 8b 45 d0 48 8b 55 a8 48 8d 98 28 03 02 00 48 RSP: 0018:ffff88807d447890 EFLAGS: 00010246 RAX: ffffc90008538048 RBX: ffffc90008538000 RCX: 1ffff920010a7009 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc90008538058 RBP: ffff88807d447998 R08: fffff520010a700c R09: fffff520010a700b R10: fffff520010a700b R11: ffffc9000853805b R12: 0000000000000000 R13: ffffc90008538058 R14: ffff88807d447b88 R15: ffff8880a2e00180 FS: 00007fbabb755700(0000) GS:ffff8880ba200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002635ad8 CR3: 00000000a9770000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: journal_end+0x231/0x2c0 fs/reiserfs/journal.c:3412 reiserfs_fill_super+0x199b/0x26b0 fs/reiserfs/super.c:2171 mount_bdev+0x26f/0x330 fs/super.c:1158 get_super_block+0x10/0x20 fs/reiserfs/super.c:2609 mount_fs+0x7f/0x2a2 fs/super.c:1261 vfs_kern_mount.part.11+0x58/0x3d0 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x376/0x2710 fs/namespace.c:2799 ksys_mount+0xba/0xe0 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xb9/0x150 fs/namespace.c:3026 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x460b4a Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007fbabb754a78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbabb754b10 RCX: 0000000000460b4a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fbabb754ad0 RBP: 00007fbabb754ad0 R08: 00007fbabb754b10 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020011500 Modules linked in: ---[ end trace 51056eebbf35ec46 ]--- RIP: 0010:check_journal_end fs/reiserfs/journal.c:3643 [inline] RIP: 0010:do_journal_end+0x3094/0x4400 fs/reiserfs/journal.c:4040 Code: 5d c8 4c 89 f6 48 89 df e8 e9 f9 fe ff ba 01 00 00 00 4c 89 f6 48 89 df e8 f9 16 ff ff e9 98 fa ff ff 0f 0b 0f 0b 0f 0b 0f 0b <0f> 0b 0f 0b 0f 0b 48 8b 45 d0 48 8b 55 a8 48 8d 98 28 03 02 00 48 REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 0, max trans age 30 RSP: 0018:ffff88807d447890 EFLAGS: 00010246 RAX: ffffc90008538048 RBX: ffffc90008538000 RCX: 1ffff920010a7009 REISERFS (device loop1): checking transaction log (loop1) RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc90008538058 RBP: ffff88807d447998 R08: fffff520010a700c R09: fffff520010a700b R10: fffff520010a700b R11: ffffc9000853805b R12: 0000000000000000 R13: ffffc90008538058 R14: ffff88807d447b88 R15: ffff8880a2e00180 init_special_inode: bogus i_mode (0) for inode loop1:2 FS: 00007fbabb755700(0000) GS:ffff8880ba200000(0000) knlGS:0000000000000000 REISERFS (device loop5): found reiserfs format "3.6" with non-standard journal REISERFS warning (device loop1): vs-13075 reiserfs_read_locked_inode: dead inode read from disk [1 2 0x0 SD]. This is likely to be race with knfsd. Ignore REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal REISERFS (device loop1): Using rupasov hash to sort names REISERFS (device loop5): using ordered data mode CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 reiserfs: using flush barriers CR2: 00000000015a0004 CR3: 00000000a9770000 CR4: 00000000001406f0 REISERFS (device loop0): using ordered data mode DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 reiserfs: using flush barriers DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400