syzbot has found a reproducer for the following issue on: HEAD commit: eb5f95f1 Merge tag 's390-5.9-6' of git://git.kernel.org/pu.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=127b7809900000 kernel config: https://syzkaller.appspot.com/x/.config?x=ffe85b197a57c180 dashboard link: https://syzkaller.appspot.com/bug?extid=6820505ae5978f4f8f2f compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16a825d9900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13a5c8d3900000 Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1426e997200000 console output: https://syzkaller.appspot.com/x/log.txt?x=1226e997200000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6820505ae5978f4f8f2f@xxxxxxxxxxxxxxxxxxxxxxxxx REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 0, max trans age 30 REISERFS (device loop0): checking transaction log (loop0) REISERFS warning (device loop0): 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): Using rupasov hash to sort names ------------[ cut here ]------------ kernel BUG at fs/reiserfs/journal.c:3630! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 6906 Comm: syz-executor291 Not tainted 5.9.0-rc5-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:3630 [inline] RIP: 0010:do_journal_end+0x3698/0x48d0 fs/reiserfs/journal.c:4026 Code: fe 0a ff ff e9 51 f9 ff ff e8 94 e0 76 ff 0f 0b e8 8d e0 76 ff 0f 0b e8 86 e0 76 ff 0f 0b e8 7f e0 76 ff 0f 0b e8 78 e0 76 ff <0f> 0b e8 71 e0 76 ff 0f 0b e8 6a e0 76 ff 48 8b 44 24 08 48 8b 54 RSP: 0018:ffffc90005607a00 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffc9000570b000 RCX: ffffffff81ff2e9a RDX: ffff8880a86485c0 RSI: ffffffff81ff5f48 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffc9000570b05b R10: 0000000000000000 R11: 0000000000000000 R12: ffffc9000570b058 R13: ffffc90005607c38 R14: 0000000000000000 R15: ffff8880a7d5a000 FS: 00007f8113e05700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9853cc7000 CR3: 00000000a6d1f000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: journal_end+0x277/0x320 fs/reiserfs/journal.c:3400 reiserfs_fill_super+0x20e9/0x2deb fs/reiserfs/super.c:2168 mount_bdev+0x32e/0x3f0 fs/super.c:1417 legacy_get_tree+0x105/0x220 fs/fs_context.c:592 vfs_get_tree+0x89/0x2f0 fs/super.c:1547 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x1387/0x20a0 fs/namespace.c:3192 do_mount fs/namespace.c:3205 [inline] __do_sys_mount fs/namespace.c:3413 [inline] __se_sys_mount fs/namespace.c:3390 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3390 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x44d45a Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 5d a1 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 3a a1 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007f8113e04bf8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000044d45a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f8113e04c10 RBP: 00007f8113e04c10 R08: 00007f8113e04c50 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000006 R13: 00007f8113e04c50 R14: 00007f8113e056d0 R15: 0000000000000005 Modules linked in: ---[ end trace 170160bcfcf2edcc ]--- RIP: 0010:check_journal_end fs/reiserfs/journal.c:3630 [inline] RIP: 0010:do_journal_end+0x3698/0x48d0 fs/reiserfs/journal.c:4026 Code: fe 0a ff ff e9 51 f9 ff ff e8 94 e0 76 ff 0f 0b e8 8d e0 76 ff 0f 0b e8 86 e0 76 ff 0f 0b e8 7f e0 76 ff 0f 0b e8 78 e0 76 ff <0f> 0b e8 71 e0 76 ff 0f 0b e8 6a e0 76 ff 48 8b 44 24 08 48 8b 54 RSP: 0018:ffffc90005607a00 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffc9000570b000 RCX: ffffffff81ff2e9a RDX: ffff8880a86485c0 RSI: ffffffff81ff5f48 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffc9000570b05b R10: 0000000000000000 R11: 0000000000000000 R12: ffffc9000570b058 R13: ffffc90005607c38 R14: 0000000000000000 R15: ffff8880a7d5a000 FS: 00007f8113e05700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9853c57000 CR3: 00000000a6d1f000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
