qnx6: unable to read the first superblock ------------[ cut here ]------------ WARNING: CPU: 0 PID: 8305 at fs/buffer.c:1125 __getblk_slow fs/buffer.c:1125 [inline] WARNING: CPU: 0 PID: 8305 at fs/buffer.c:1125 bdev_getblk+0x530/0x5f0 fs/buffer.c:1461 Modules linked in: CPU: 0 UID: 0 PID: 8305 Comm: syz.2.356 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __getblk_slow fs/buffer.c:1125 [inline] pc : bdev_getblk+0x530/0x5f0 fs/buffer.c:1461 lr : __getblk_slow fs/buffer.c:1125 [inline] lr : bdev_getblk+0x530/0x5f0 fs/buffer.c:1461 sp : ffff80009c617780 x29: ffff80009c6177c0 x28: 1fffe000195bcc03 x27: dfff800000000000 x26: dfff800000000000 x25: dfff800000000000 x24: 0000000000000200 x23: ffff0000c14a0b98 x22: 0000000000108c48 x21: 0000000000000000 x20: 1fffe00018294173 x19: 0000000000000200 x18: 00000000d9b178cd x17: ffff800093605000 x16: ffff80008052b264 x15: 0000000000000003 x14: 0000000000000002 x13: 0000000000000406 x12: 0000000000ff0100 x11: 0000000000080000 x10: 0000000000007f82 x9 : ffff8000a5dee000 x8 : 0000000000007f83 x7 : ffff800080ba1030 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000200 x0 : 0000000000000000 Call trace: __getblk_slow fs/buffer.c:1125 [inline] (P) bdev_getblk+0x530/0x5f0 fs/buffer.c:1461 (P) __bread_gfp+0x90/0x34c fs/buffer.c:1515 sb_bread include/linux/buffer_head.h:346 [inline] qnx6_check_first_superblock+0x9c/0x2e8 fs/qnx6/inode.c:260 qnx6_fill_super+0x43c/0x103c fs/qnx6/inode.c:332 get_tree_bdev_flags+0x360/0x414 fs/super.c:1692 get_tree_bdev+0x2c/0x3c fs/super.c:1715 qnx6_get_tree+0x28/0x38 fs/qnx6/inode.c:629 vfs_get_tree+0x90/0x28c fs/super.c:1815 do_new_mount+0x278/0x7f4 fs/namespace.c:3808 path_mount+0x5b4/0xde0 fs/namespace.c:4123 do_mount fs/namespace.c:4136 [inline] __do_sys_mount fs/namespace.c:4347 [inline] __se_sys_mount fs/namespace.c:4324 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4324 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 480 hardirqs last enabled at (479): [] lookup_bh_lru fs/buffer.c:1390 [inline] hardirqs last enabled at (479): [] find_get_block_common+0x334/0xde8 fs/buffer.c:1404 hardirqs last disabled at (480): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (296): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (294): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- getblk(): block size 512 not aligned to logical block size 1024 qnx6: unable to read the first superblock qnx6: unable to read the first superblock