bisecting fixing commit since 87ef12027b9b1dd0e0b12cf311fbcb19f9d92539 building syzkaller on cc402841ba1e067327a4adaf0a65335e47b5e83c testing commit 87ef12027b9b1dd0e0b12cf311fbcb19f9d92539 with gcc (GCC) 8.1.0 kernel signature: 74ad6baaaa421635ec56d51fc9882d8265726d8c all runs: crashed: kernel BUG at fs/reiserfs/journal.c:LINE! testing current HEAD 2187f215ebaac73ddbd814696d7c7fa34f0c3de0 testing commit 2187f215ebaac73ddbd814696d7c7fa34f0c3de0 with gcc (GCC) 8.1.0 kernel signature: 643fcca30f5dd8a0c09eb4303c43e593254566f7 all runs: crashed: kernel BUG at fs/reiserfs/journal.c:LINE! revisions tested: 2, total time: 18m37.251062734s (build: 9m21.218568325s, test: 8m27.948231378s) the crash still happens on HEAD commit msg: Merge tag 'for-5.5-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux crash: kernel BUG at fs/reiserfs/journal.c:LINE! REISERFS warning (device loop0): sh-462 journal_init: unable to initialize journal device REISERFS warning (device loop0): sh-2022 reiserfs_fill_super: unable to initialize journal space 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 ------------[ cut here ]------------ REISERFS (device loop1): Using r5 hash to sort names kernel BUG at fs/reiserfs/journal.c:3633! invalid opcode: 0000 [#1] SMP KASAN REISERFS (device loop1): using 3.5.x disk format CPU: 1 PID: 4758 Comm: syz-executor2 Not tainted 5.5.0-rc2-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:3633 [inline] RIP: 0010:do_journal_end+0x312b/0x4730 fs/reiserfs/journal.c:4029 Code: 4c 8b 5d b0 e9 1b fa ff ff 48 8b 7d d0 4c 89 f6 4c 89 5d 98 e8 26 2f ff ff 4c 8b 5d 98 e9 2c fa ff ff 0f 0b 0f 0b 0f 0b 0f 0b <0f> 0b 0f 0b 0f 0b 48 8b 45 c8 48 8b 55 a0 48 8d 98 28 03 02 00 48 RSP: 0018:ffff8881d8a9f8e0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffffc900016e1000 RCX: 1ffff920002dc209 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc900016e1058 RBP: ffff8881d8a9f9f8 R08: fffff520002dc20c R09: fffff520002dc20c R10: fffff520002dc20b R11: ffffc900016e105b R12: 0000000000000000 R13: ffffc900016e1058 R14: ffff8881d8a9fc00 R15: ffff8881d78e8000 FS: 00007f4ef5c8a700(0000) GS:ffff8881db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa0b96bf110 CR3: 00000001d93ba000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: journal_end+0x203/0x290 fs/reiserfs/journal.c:3403 reiserfs_fill_super+0x1bbb/0x28b0 fs/reiserfs/super.c:2167 REISERFS (device loop3): found reiserfs format "3.5" with non-standard journal mount_bdev+0x27b/0x340 fs/super.c:1415 REISERFS (device loop3): using ordered data mode get_super_block+0x10/0x20 fs/reiserfs/super.c:2604 legacy_get_tree+0x103/0x1f0 fs/fs_context.c:647 vfs_get_tree+0x8b/0x2d0 fs/super.c:1545 do_new_mount fs/namespace.c:2822 [inline] do_mount+0x1285/0x1b70 fs/namespace.c:3142 reiserfs: using flush barriers REISERFS (device loop3): journal params: device loop3, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 __do_sys_mount fs/namespace.c:3351 [inline] __se_sys_mount fs/namespace.c:3328 [inline] __x64_sys_mount+0x169/0x1c0 fs/namespace.c:3328 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457efa Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 dd 8f 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 ba 8f fb ff c3 66 0f 1f 84 00 00 00 00 00 REISERFS (device loop3): checking transaction log (loop3) RSP: 002b:00007f4ef5c89ba8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000457efa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f4ef5c89bf0 RBP: 0000000000000014 R08: 0000000020013900 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000014 R14: 00000000006fcc58 R15: 0000000000000000 Modules linked in: ---[ end trace f98d5f52621a91ef ]--- init_special_inode: bogus i_mode (0) for inode loop3:2 RIP: 0010:check_journal_end fs/reiserfs/journal.c:3633 [inline] RIP: 0010:do_journal_end+0x312b/0x4730 fs/reiserfs/journal.c:4029 REISERFS warning (device loop3): vs-13075 reiserfs_read_locked_inode: dead inode read from disk [1 2 0x0 SD]. This is likely to be race with knfsd. Ignore Code: 4c 8b 5d b0 e9 1b fa ff ff 48 8b 7d d0 4c 89 f6 4c 89 5d 98 e8 26 2f ff ff 4c 8b 5d 98 e9 2c fa ff ff 0f 0b 0f 0b 0f 0b 0f 0b <0f> 0b 0f 0b 0f 0b 48 8b 45 c8 48 8b 55 a0 48 8d 98 28 03 02 00 48 REISERFS (device loop3): Using r5 hash to sort names RSP: 0018:ffff8881d8a9f8e0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffffc900016e1000 RCX: 1ffff920002dc209 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc900016e1058 REISERFS (device loop3): using 3.5.x disk format RBP: ffff8881d8a9f9f8 R08: fffff520002dc20c R09: fffff520002dc20c R10: fffff520002dc20b R11: ffffc900016e105b R12: 0000000000000000 R13: ffffc900016e1058 R14: ffff8881d8a9fc00 R15: ffff8881d78e8000 FS: 00007f4ef5c8a700(0000) GS:ffff8881db100000(0000) knlGS:0000000000000000 REISERFS (device loop4): found reiserfs format "3.5" with non-standard journal CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa0b96bf110 CR3: 00000001d93ba000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400