On Tue, Feb 20, 2018 at 10:46:25PM +0800, Anand Jain wrote: > The replace target device can be missing in which case we don't > allocate a missing btrfs_device when mounted with the -o degraded. > So check the device before access. > > BUG: unable to handle kernel NULL pointer dereference at 00000000000000b0 Please don't use uncommon acronyms, NPD is quite confusing, null pointer deref should be fine. > IP: btrfs_destroy_dev_replace_tgtdev+0x43/0xf0 [btrfs] > Call Trace: > btrfs_dev_replace_cancel+0x15f/0x180 [btrfs] > btrfs_ioctl+0x2216/0x2590 [btrfs] > do_vfs_ioctl+0x625/0x650 > SyS_ioctl+0x4e/0x80 > do_syscall_64+0x5d/0x160 > entry_SYSCALL64_slow_path+0x25/0x25 Do you have a reproducer for that? -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
