r0 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0x105142, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/exe\x00', 0x0, 0x0)
r2 = dup2(r1, r0)
lseek(r2, 0x7, 0x0)
r3 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0xa001, 0x0)
syz_mount_image$vfat(0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
sendfile(r3, r2, 0x0, 0x7ffffff9)