A FAT mount of 512 byte block fs on 4K media now crashes. It used to just error. This is of course doubly fun if you've got your own USB key firmware and an automounting distribution 8-) # mount /dev/sdb /mnt2 [ 419.050667] FAT-fs (sdb): logical sector size too small for device (logical s ector size = 512) [ 419.051938] BUG: unable to handle kernel NULL pointer dereference at 00000054 [ 419.053040] IP: [<c10b63e0>] mount_fs+0x20/0xb0 [ 419.053743] *pde = 00000000 [ 419.054207] Oops: 0000 [#1] [ 419.054671] Modules linked in: [ 419.055160] CPU: 0 PID: 52 Comm: mount Tainted: G I 3.15.0-rc5-nex t-20140513+ #58 [ 419.056400] task: f6b403f0 ti: f6858000 task.ti: f6858000 [ 419.057202] EIP: 0060:[<c10b63e0>] EFLAGS: 00010207 CPU: 0 [ 419.058017] EIP is at mount_fs+0x20/0xb0 [ 419.058606] EAX: 00000000 EBX: f6b183c0 ECX: 000008e6 EDX: 000008e5 [ 419.059534] ESI: 00000000 EDI: c14e80b8 EBP: f6859f14 ESP: f6859ef0 [ 419.060461] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068 [ 419.061263] CR0: 8005003b CR2: 00000054 CR3: 34ecb000 CR4: 00240790 [ 419.062190] Stack: [ 419.062504] 00000000 f6b183c0 f6b1844c f6b3a010 f6859f14 c10cb893 f6b183c0 c 14e80b8 [ 419.063845] f6b3a010 f6859f30 c10cba01 00000000 00008000 c14e2540 00000020 c 14e80b8 [ 419.065186] f6859f78 c10ce174 00000000 00008000 c14e80b8 00008000 f6ae8608 f 6b3a010 [ 419.066526] Call Trace: [ 419.066904] [<c10cb893>] ? alloc_vfsmnt+0x83/0x140 [ 419.067632] [<c10cba01>] vfs_kern_mount+0x41/0xe0 [ 419.068347] [<c10ce174>] do_mount+0x1b4/0x8d0 [ 419.069013] [<c1095641>] ? strndup_user+0x31/0xc0 [ 419.069728] [<c10ceb43>] SyS_mount+0x83/0xd0 [ 419.070381] [<c1399ed0>] syscall_call+0x7/0xb [ 419.071046] Code: 01 00 00 00 e8 32 b9 f8 ff 5d c3 55 89 e5 57 89 c7 56 53 8d 64 24 e8 8b 45 08 89 04 24 8d 07 ff 57 08 3d 00 f0 ff ff 89 c6 77 2e <8b> 58 54 85 db 74 32 8b 43 6c 85 c0 74 6a 3d 40 58 4e c1 74 52 [ 419.075409] EIP: [<c10b63e0>] mount_fs+0x20/0xb0 SS:ESP 0068:f6859ef0 [ 419.076412] CR2: 0000000000000054 [ 419.076914] ---[ end trace 6c9f8a78f9e34c70 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
