Hello, syzbot found the following issue on: HEAD commit: d192f5382581 Merge tag 'arm64-fixes' of git://git.kernel.o.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=16ef7c6aa80000 kernel config: https://syzkaller.appspot.com/x/.config?x=28e257d54f02de1a dashboard link: https://syzkaller.appspot.com/bug?extid=ce3af36144a13b018cc7 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15302152a80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12771152a80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5646cedb4f1a/disk-d192f538.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/14060d990196/vmlinux-d192f538.xz kernel image: https://storage.googleapis.com/syzbot-assets/f58a09eb6b40/bzImage-d192f538.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/b412a33c80f2/mount_0.gz The issue was bisected to: commit f6e2c20ca7604e6a267c93a511d19dda72573be1 Author: Liu Shixin <liushixin2@xxxxxxxxxx> Date: Fri Apr 29 21:38:04 2022 +0000 fs: sysv: check sbi->s_firstdatazone in complete_read_super bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=167a02bea80000 final oops: https://syzkaller.appspot.com/x/report.txt?x=157a02bea80000 console output: https://syzkaller.appspot.com/x/log.txt?x=117a02bea80000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ce3af36144a13b018cc7@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: f6e2c20ca760 ("fs: sysv: check sbi->s_firstdatazone in complete_read_super") ------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 1 PID: 5011 at fs/buffer.c:1257 __brelse fs/buffer.c:1257 [inline] WARNING: CPU: 1 PID: 5011 at fs/buffer.c:1257 __brelse+0x6b/0xa0 fs/buffer.c:1251 Modules linked in: CPU: 1 PID: 5011 Comm: syz-executor104 Not tainted 6.5.0-rc2-syzkaller-00307-gd192f5382581 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 RIP: 0010:__brelse fs/buffer.c:1257 [inline] RIP: 0010:__brelse+0x6b/0xa0 fs/buffer.c:1251 Code: 7c 04 84 d2 75 4e 44 8b 63 60 31 ff 44 89 e6 e8 1b 29 8d ff 45 85 e4 75 1c e8 a1 2d 8d ff 48 c7 c7 20 a7 7c 8a e8 65 f6 53 ff <0f> 0b 5b 5d 41 5c e9 8a 2d 8d ff e8 85 2d 8d ff be 04 00 00 00 48 RSP: 0018:ffffc900033cf8c8 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88807135a2b8 RCX: 0000000000000000 RDX: ffff88807e0da000 RSI: ffffffff814c5346 RDI: 0000000000000001 RBP: ffff88807135a318 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88807135a2b8 R14: dffffc0000000000 R15: ffffffff81f85b70 FS: 0000555555653380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000066c7e0 CR3: 000000007cf88000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> brelse include/linux/buffer_head.h:339 [inline] __invalidate_bh_lrus fs/buffer.c:1492 [inline] invalidate_bh_lru+0xa2/0x190 fs/buffer.c:1505 csd_do_func kernel/smp.c:131 [inline] smp_call_function_many_cond+0x122a/0x1570 kernel/smp.c:826 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1003 invalidate_bdev+0x9b/0xd0 block/bdev.c:85 invalidate_disk+0x41/0x110 block/genhd.c:734 __loop_clr_fd+0x259/0x900 drivers/block/loop.c:1164 loop_clr_fd drivers/block/loop.c:1257 [inline] lo_ioctl+0x5d8/0x1a50 drivers/block/loop.c:1563 blkdev_ioctl+0x2f9/0x770 block/ioctl.c:621 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f986153247b Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00 RSP: 002b:00007ffd9d3fbdc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000016 RCX: 00007f986153247b RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004 RBP: 0000000000000004 R08: 00007ffd9d3fbe60 R09: 0000000000009df6 R10: 0000000000008003 R11: 0000000000000246 R12: 00007ffd9d3fbe60 R13: 0000000000000003 R14: 0000000000010000 R15: 0000000000000001 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
