On Sat, 1 Oct 2022 at 15:42, syzbot <syzbot+3209de1c96568282edc6@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: 3800a713b607 Merge tag 'mm-hotfixes-stable-2022-09-26' of .. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=119b63ef080000 > kernel config: https://syzkaller.appspot.com/x/.config?x=a1992c90769e07 > dashboard link: https://syzkaller.appspot.com/bug?extid=3209de1c96568282edc6 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/0012f6c5db09/disk-3800a713.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/6c2ba89f2218/vmlinux-3800a713.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+3209de1c96568282edc6@xxxxxxxxxxxxxxxxxxxxxxxxx +ntfs3 maintainers > ntfs3: loop5: Different NTFS' sector size (1024) and media sector size (512) > ntfs3: loop5: RAW NTFS volume: Filesystem size 0.00 Gb > volume size 0.00 Gb. Mount in read-only > BUG: kernel NULL pointer dereference, address: 000000000000002b > #PF: supervisor read access in kernel mode > #PF: error_code(0x0000) - not-present page > PGD 7b94f067 P4D 7b94f067 PUD 21ad8067 PMD 0 > Oops: 0000 [#1] PREEMPT SMP KASAN > CPU: 1 PID: 15950 Comm: syz-executor.5 Not tainted 6.0.0-rc7-syzkaller-00029-g3800a713b607 #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 > RIP: 0010:__lock_release kernel/locking/lockdep.c:5350 [inline] > RIP: 0010:lock_release+0x22c/0x780 kernel/locking/lockdep.c:5686 > Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a7 04 00 00 <8b> 73 24 85 f6 0f 85 66 04 00 00 48 8d 7b 22 48 b8 00 00 00 00 00 > RSP: 0018:ffffc90014787a10 EFLAGS: 00010046 > RAX: 0000000000000007 RBX: 0000000000000007 RCX: ffffc90014787a60 > RDX: 0000000000000000 RSI: ffff888072fb0518 RDI: ffff888039842ac4 > RBP: 1ffff920028f0f44 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000001 R11: 0000000000000000 R12: ffff888072fb0518 > R13: 0000000000000002 R14: ffff888039842a70 R15: ffff888039842000 > FS: 00007f7638dfe700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000000000002b CR3: 00000000281a9000 CR4: 00000000003506e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:157 [inline] > _raw_spin_unlock_irq+0x12/0x40 kernel/locking/spinlock.c:202 > spin_unlock_irq include/linux/spinlock.h:399 [inline] > truncate_inode_pages_final+0x5f/0x80 mm/truncate.c:484 > ntfs_evict_inode+0x16/0xa0 fs/ntfs3/inode.c:1741 > evict+0x2ed/0x6b0 fs/inode.c:665 > iput_final fs/inode.c:1748 [inline] > iput.part.0+0x55d/0x810 fs/inode.c:1774 > iput+0x58/0x70 fs/inode.c:1764 > ntfs_fill_super+0x2e89/0x37f0 fs/ntfs3/super.c:1190 > get_tree_bdev+0x440/0x760 fs/super.c:1323 > vfs_get_tree+0x89/0x2f0 fs/super.c:1530 > do_new_mount fs/namespace.c:3040 [inline] > path_mount+0x1326/0x1e20 fs/namespace.c:3370 > do_mount fs/namespace.c:3383 [inline] > __do_sys_mount fs/namespace.c:3591 [inline] > __se_sys_mount fs/namespace.c:3568 [inline] > __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 > entry_SYSCALL_64_after_hwframe+0x63/0xcd > RIP: 0033:0x7f7639e8bb9a > Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007f7638dfdf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 > RAX: ffffffffffffffda RBX: 0000000020000580 RCX: 00007f7639e8bb9a > RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f7638dfdfe0 > RBP: 00007f7638dfe020 R08: 00007f7638dfe020 R09: 0000000020000000 > R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 > R13: 0000000020000100 R14: 00007f7638dfdfe0 R15: 0000000020000040 > </TASK> > Modules linked in: > CR2: 000000000000002b > ---[ end trace 0000000000000000 ]--- > RIP: 0010:__lock_release kernel/locking/lockdep.c:5350 [inline] > RIP: 0010:lock_release+0x22c/0x780 kernel/locking/lockdep.c:5686 > Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a7 04 00 00 <8b> 73 24 85 f6 0f 85 66 04 00 00 48 8d 7b 22 48 b8 00 00 00 00 00 > RSP: 0018:ffffc90014787a10 EFLAGS: 00010046 > RAX: 0000000000000007 RBX: 0000000000000007 RCX: ffffc90014787a60 > RDX: 0000000000000000 RSI: ffff888072fb0518 RDI: ffff888039842ac4 > RBP: 1ffff920028f0f44 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000001 R11: 0000000000000000 R12: ffff888072fb0518 > R13: 0000000000000002 R14: ffff888039842a70 R15: ffff888039842000 > FS: 00007f7638dfe700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000000000002b CR3: 00000000281a9000 CR4: 00000000003506e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > ---------------- > Code disassembly (best guess): > 0: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax > 7: fc ff df > a: 48 89 fa mov %rdi,%rdx > d: 48 c1 ea 03 shr $0x3,%rdx > 11: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx > 15: 48 89 f8 mov %rdi,%rax > 18: 83 e0 07 and $0x7,%eax > 1b: 83 c0 03 add $0x3,%eax > 1e: 38 d0 cmp %dl,%al > 20: 7c 08 jl 0x2a > 22: 84 d2 test %dl,%dl > 24: 0f 85 a7 04 00 00 jne 0x4d1 > * 2a: 8b 73 24 mov 0x24(%rbx),%esi <-- trapping instruction > 2d: 85 f6 test %esi,%esi > 2f: 0f 85 66 04 00 00 jne 0x49b > 35: 48 8d 7b 22 lea 0x22(%rbx),%rdi > 39: 48 rex.W > 3a: b8 00 00 00 00 mov $0x0,%eax > > > --- > 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. > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/000000000000c0e5c005e9f94888%40google.com.
