Message ID | 20200113201212.1149950-1-rafaeldtinoco@ubuntu.com |
---|---|
State | New |
Headers | show |
Series | [focal] ocfs2: fix the crash due to call ocfs2_get_dlm_debug once less | expand |
On Mon, Jan 13, 2020 at 08:12:12PM +0000, Rafael David Tinoco wrote: > BugLink: https://bugs.launchpad.net/bugs/1852122 > > Because ocfs2_get_dlm_debug() function is called once less here, ocfs2 > file system will trigger the system crash, usually after ocfs2 file > system is unmounted. > > This system crash is caused by a generic memory corruption, these crash > backtraces are not always the same, for exapmle, > > ocfs2: Unmounting device (253,16) on (node 172167785) > general protection fault: 0000 [#1] SMP PTI > CPU: 3 PID: 14107 Comm: fence_legacy Kdump: > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) > RIP: 0010:__kmalloc+0xa5/0x2a0 > Code: 00 00 4d 8b 07 65 4d 8b > RSP: 0018:ffffaa1fc094bbe8 EFLAGS: 00010286 > RAX: 0000000000000000 RBX: d310a8800d7a3faf RCX: 0000000000000000 > RDX: 0000000000000000 RSI: 0000000000000dc0 RDI: ffff96e68fc036c0 > RBP: d310a8800d7a3faf R08: ffff96e6ffdb10a0 R09: 00000000752e7079 > R10: 000000000001c513 R11: 0000000004091041 R12: 0000000000000dc0 > R13: 0000000000000039 R14: ffff96e68fc036c0 R15: ffff96e68fc036c0 > FS: 00007f699dfba540(0000) GS:ffff96e6ffd80000(0000) knlGS:00000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000055f3a9d9b768 CR3: 000000002cd1c000 CR4: 00000000000006e0 > Call Trace: > ext4_htree_store_dirent+0x35/0x100 [ext4] > htree_dirblock_to_tree+0xea/0x290 [ext4] > ext4_htree_fill_tree+0x1c1/0x2d0 [ext4] > ext4_readdir+0x67c/0x9d0 [ext4] > iterate_dir+0x8d/0x1a0 > __x64_sys_getdents+0xab/0x130 > do_syscall_64+0x60/0x1f0 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x7f699d33a9fb > > This regression problem was introduced by commit e581595ea29c ("ocfs: no > need to check return value of debugfs_create functions"). > > Link: http://lkml.kernel.org/r/20191225061501.13587-1-ghe@suse.com > Fixes: e581595ea29c ("ocfs: no need to check return value of debugfs_create functions") > Signed-off-by: Gang He <ghe@suse.com> > Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com> > Cc: Mark Fasheh <mark@fasheh.com> > Cc: Joel Becker <jlbec@evilplan.org> > Cc: Junxiao Bi <junxiao.bi@oracle.com> > Cc: Changwei Ge <gechangwei@live.cn> > Cc: Gang He <ghe@suse.com> > Cc: Jun Piao <piaojun@huawei.com> > Cc: <stable@vger.kernel.org> [5.3+] > Signed-off-by: Andrew Morton <akpm@linux-foundation.org> > Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> > (cherry picked from commit b73eba2a867e10b9b4477738677341f3307c07bb) > Signed-off-by: Rafael David Tinoco <rafaeldtinoco@ubuntu.com> Focal has already received this patch from upstream stable. Thanks!
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index 6e774c5ea13b..8a2e284ccfcd 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -3282,6 +3282,7 @@ static void ocfs2_dlm_init_debug(struct ocfs2_super *osb) debugfs_create_u32("locking_filter", 0600, osb->osb_debug_root, &dlm_debug->d_filter_secs); + ocfs2_get_dlm_debug(dlm_debug); } static void ocfs2_dlm_shutdown_debug(struct ocfs2_super *osb)