F2FS-fs (loop2): Can't find valid F2FS filesystem in 1th superblock Bluetooth: hci2: command 0x0409 tx timeout affs: No valid root block on device loop0 ================================================================================ UBSAN: Undefined behaviour in fs/f2fs/super.c:2227:16 shift exponent 256 is too large for 32-bit type 'int' CPU: 1 PID: 12116 Comm: syz-executor.2 Not tainted 4.19.150-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x22c/0x33e lib/dump_stack.c:118 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161 __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 lib/ubsan.c:422 sanity_check_raw_super fs/f2fs/super.c:2227 [inline] read_raw_super_block fs/f2fs/super.c:2631 [inline] f2fs_fill_super.cold+0x1f9/0x5fb fs/f2fs/super.c:2842 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x318 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x51c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x46087a 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:00007fb13ee60a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb13ee60b20 RCX: 000000000046087a RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007fb13ee60ae0 RBP: 00007fb13ee60ae0 R08: 00007fb13ee60b20 R09: 0000000020000000 R10: 0000000000000011 R11: 0000000000000202 R12: 0000000020000000 R13: 00000000200000c0 R14: 0000000020000040 R15: 0000000020000080 ================================================================================ F2FS-fs (loop2): Invalid blocksize (1), supports only 4KB F2FS-fs (loop2): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop2): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop2): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop2): Invalid blocksize (1), supports only 4KB F2FS-fs (loop2): Can't find valid F2FS filesystem in 2th superblock audit: type=1804 audit(1602132965.593:52): pid=12123 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir094066935/syzkaller.FlJzX0/57/bus" dev="sda1" ino=16079 res=1 F2FS-fs (loop2): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop2): Can't find valid F2FS filesystem in 1th superblock audit: type=1804 audit(1602132965.843:53): pid=12172 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir094066935/syzkaller.FlJzX0/58/bus" dev="sda1" ino=16099 res=1 affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 Bluetooth: hci2: command 0x041b tx timeout affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 Bluetooth: hci2: command 0x040f tx timeout affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 f2fs_msg: 78 callbacks suppressed F2FS-fs (loop2): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop2): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop2): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop2): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop2): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop2): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop2): Magic Mismatch, valid(0xf2f52010) - read(0x0) affs: No valid root block on device loop0 F2FS-fs (loop2): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop2): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop1): Magic Mismatch, valid(0xf2f52010) - read(0x0) affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 Bluetooth: hci2: command 0x0419 tx timeout FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 12797 Comm: syz-executor.3 Not tainted 4.19.150-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x22c/0x33e lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0x2f lib/fault-inject.c:149 __should_failslab+0x153/0x1b6 mm/failslab.c:32 should_failslab+0x5/0xf mm/slab_common.c:1588 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc_trace+0x2b6/0x4b0 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] kvm_irqfd_assign arch/x86/kvm/../../../virt/kvm/eventfd.c:309 [inline] kvm_irqfd+0x100/0x1b30 arch/x86/kvm/../../../virt/kvm/eventfd.c:586 kvm_vm_ioctl+0x35c/0x17e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3262 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 affs: No valid root block on device loop0 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45de29 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fbad6bccc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000011ac0 RCX: 000000000045de29 RDX: 0000000020000040 RSI: 000000004020ae76 RDI: 0000000000000008 RBP: 00007fbad6bccca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff7ef776cf R14: 00007fbad6bcd9c0 R15: 000000000118bf2c affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 device sit0 entered promiscuous mode affs: No valid root block on device loop0 affs: No valid root block on device loop0 affs: No valid root block on device loop0 f2fs_msg: 270 callbacks suppressed F2FS-fs (loop1): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop2): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop1): Can't find valid F2FS filesystem in 1th superblock