http://bugzilla.suse.com/show_bug.cgi?id=935174 Bug ID: 935174 Summary: ext4 file system level crash is happening upon sudden removal of drives Classification: openSUSE Product: openSUSE 12.3 Version: Final Hardware: x86-64 OS: openSUSE 12.1 Status: NEW Severity: Major Priority: P5 - None Component: Kernel Assignee: kernel-maintainers@forge.provo.novell.com Reporter: uday.lingala@avagotech.com QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- In sles12 machine, when we create a ext3 file system on Logical drives and pull the cables, we are seeing at crash in file system level: [ 2398.645254] Call Trace: [ 2398.645273] [<ffffffff8100467d>] dump_trace+0x7d/0x2d0 [ 2398.645279] [<ffffffff81004964>] show_stack_log_lvl+0x94/0x170 [ 2398.645285] [<ffffffff81005d91>] show_stack+0x21/0x50 [ 2398.645294] [<ffffffff8150b1db>] dump_stack+0x41/0x51 [ 2398.645304] [<ffffffff81054e97>] warn_slowpath_common+0x77/0x90 [ 2398.645320] [<ffffffffa06fc4be>] __ext4_handle_dirty_metadata+0x17e/0x190 [ext4] [ 2398.645412] [<ffffffffa06d3a97>] ext4_mark_iloc_dirty+0x4c7/0x670 [ext4] [ 2398.645436] [<ffffffffa06d3d37>] ext4_mark_inode_dirty+0x67/0x1d0 [ext4] [ 2398.645459] [<ffffffffa06d6e0b>] ext4_dirty_inode+0x3b/0x60 [ext4] [ 2398.645479] [<ffffffff811c5af2>] __mark_inode_dirty+0x172/0x270 [ 2398.645489] [<ffffffff811b7bb1>] update_time+0x81/0xc0 [ 2398.645496] [<ffffffff811b7ce9>] touch_atime+0xf9/0x140 [ 2398.645505] [<ffffffff81137063>] generic_file_aio_read+0x393/0x6f0 [ 2398.645514] [<ffffffff8119e2cc>] do_sync_read+0x5c/0x90 [ 2398.645521] [<ffffffff8119e879>] vfs_read+0x99/0x160 [ 2398.645526] [<ffffffff8119f378>] SyS_read+0x48/0xa0 [ 2398.645534] [<ffffffff8151ae5c>] sysenter_dispatch+0x7/0x21 [ 2398.645539] ---[ end trace f0415171e4d452e0 ]--- [ 2398.645551] BUG: unable to handle kernel NULL pointer If we do raw IO on to the logical drives and pull the cables to enclosure, IOs will stop and we are not seeing any issue. When we create the file system as ext3, we are seeing the crash. I am attaching the crash logs here. Steps reproduce: -- You are receiving this mail because: You are on the CC list for the bug.