Bug 232209
| Summary: | kernel panic after rmmod cifs | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 4 | Reporter: | Vasily Averin <vvs> |
| Component: | kernel | Assignee: | Jeff Layton <jlayton> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Martin Jenner <mjenner> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 4.4 | CC: | khorenko, staubach, steved |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | 2.6.9-55.EL | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2007-05-02 18:46:30 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This issue has been fixed in mainstream by the following patch: [CIFS] rmmod cifs can oops if done soon after the last cifs unmount Signed-off-by: Shaggy (shaggy.com) Signed-off-by: Steve French (sfrench.com http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=f191401f5906f4d942fac87ebeb4671faf1ba7d6 This patch is present in the 4.5 release kernel. Please test on -55.EL or greater and reopen this bug if it's not fixed. |
SWsoft Virtuozzo/OpenVZ Linux kernel team has discovered that Kernel crashes because cifsd kernel thread can still alive after "rmmod cifs" # uname -a Linux dhcp17-60.qa.sw.ru 2.6.9-42.0.8.EL #1 Tue Jan 23 12:34:49 EST 2007 x86_64 x86_64 x86_64 GNU/Linux # mount -t cifs //<share> /mnt -o user=****,pass=***,uid=root,gid=root,file_mode=0644,dir_mode=0755 # umount /mnt # rmmod cifs # ps ax | grep cifsd 3654 ? D 0:00 [cifsd] {wait sometime ==> oops} Unable to handle kernel paging request at ffffffffa025d05c RIP: [<ffffffffa025d05c>] PML4 103027 PGD 105027 PMD 981e067 PTE 0 Oops: 0010 [1] CPU 0 Modules linked in: netconsole netdump nls_utf8 md5 ipv6 parport_pc lp parport autofs4 sunrpc iptable_filter ip_tables ds yenta_socket pcmcia_core dm_mirror button battery ac uhci_hcd snd_ens1371 snd_rawmidi snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_page_alloc snd_ac97_codec snd soundcore e1000 floppy ext3 jbd dm_mod mptscsih mptsas mptspi mptfc mptscsi mptbase sd_mod scsi_mod Pid: 3654, comm: cifsd Not tainted 2.6.9-42.0.8.EL RIP: 0010:[<ffffffffa025d05c>] [<ffffffffa025d05c>] RSP: 0018:00000100093dde98 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffffa0287150 RCX: 00000100093dc000 RDX: 00000100093dc000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000fffffffc R08: 00000100093dc000 R09: 000001000ef72ce0 R10: 0000000000000246 R11: 0000000000000206 R12: 0000000000000027 R13: 0000000000000400 R14: 0000010001705400 R15: 000001000ab77d80 FS: 0000002a9555eb00(0000) GS:ffffffff80545480(0000) knlGS:00000000f7ff58e0 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: ffffffffa025d05c CR3: 0000000000101000 CR4: 00000000000006e0 Process cifsd (pid: 3654, threadinfo 00000100093dc000, task 00000100089d6ee0) Stack: 0000010008130ea0 0000000000000000 0000010008130630 0000010008a25c00 000001000ab77d80 00000100083e8240 000001000ab77d80 0000000000000004 00000100089d77f0 0000010000000000 Call Trace:<ffffffff801509b3>{worker_thread+0} <ffffffff801115cb>{child_rip+8} <ffffffff801115c3>{child_rip+0} Code: Bad RIP value. RIP [<ffffffffa025d05c>] RSP <00000100093dde98> CR2: ffffffffa025d05c