Hi I report this crash in the ext3 filesystem. The filesystem is mounted on nbd, the nbd server was rebooted - so the nbd client returned errors on all requests. Those errors caused kernel crash. The kernel version is 3.4.62. The crash happens in submit_bh when attempting to write the superblock, the condition that caused the crash is BUG_ON(!buffer_mapped(bh)); Mikulas block nbd3: Receive control failed (result -104) block nbd3: shutting down socket end_request: I/O error, dev nbd3, sector 187842584 end_request: I/O error, dev nbd3, sector 205532832 end_request: I/O error, dev nbd3, sector 205532584 end_request: I/O error, dev nbd3, sector 205169504 end_request: I/O error, dev nbd3, sector 205169256 end_request: I/O error, dev nbd3, sector 203666336 end_request: I/O error, dev nbd3, sector 203666088 end_request: I/O error, dev nbd3, sector 207242104 end_request: I/O error, dev nbd3, sector 207241856 block nbd3: queue cleared block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 205532712 block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 229789648 block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 229789680 block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 229789760 block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 229789832 block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 229789776 block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 229785616 block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 229785616 block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 187842584 EXT3-fs error (device nbd3): ext3_find_entry: reading directory #5865482 offset 0 block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 0 Buffer I/O error on device nbd3, logical block 0 lost page write due to I/O error on nbd3 EXT3-fs (nbd3): I/O error while writing superblock block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 187842584 EXT3-fs error (device nbd3): ext3_find_entry: reading directory #5865482 offset 0 block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 0 Buffer I/O error on device nbd3, logical block 0 lost page write due to I/O error on nbd3 EXT3-fs (nbd3): I/O error while writing superblock block nbd3: Attempted send on closed socket end_request: I/O error, dev nbd3, sector 187842584 EXT3-fs error (device nbd3): ext3_find_entry: reading directory #5865482 offset 0 ------------[ cut here ]------------ kernel BUG at fs/buffer.c:2880! invalid opcode: 0000 [#1] PREEMPT Modules linked in: speedstep_smi tun sha1_generic arc4 ecb ppp_mppe ppp_async crc_ccitt ppp_generic slhc ext3 jbd mbcache sha256_generic krng chainiv crypto_wq rng aes_generic cbc cryptomgr aead pcompress dm_crypt crypto_hash crypto_blkcipher crypto_algapi crypto dm_mod loop nbd xt_length xt_limit xt_ipfile xt_state ipt_REJECT xt_conntrack iptable_filter ipt_MASQUERADE xt_tcpudp xt_multiport iptable_nat ip_tables x_tables nf_nat_sip nf_conntrack_sip nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack_ftp nf_conntrack af_packet cpufreq_stats cpufreq_powersave ipv6 freq_table speedstep_lib parport_pc parport 8250 serial_core apm 8139too bitrev crc32 snd_maestro3 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm uhci_hcd snd_timer microcode snd_page_alloc rtc_cmos ide_cd_mod psmouse pcspkr usbcore snd i2c_piix4 yenta_socket cdrom 3c59x pcmcia_core usb_common mii soundcore i2c_core pcmcia_rsrc intel_agp intel_gtt agpgart unix Pid: 26759, comm: bash Tainted: G W 3.4.62 #3 Dell Computer Corporation Latitude C600 /Latitude C600 EIP: 0060:[<c10c8295>] EFLAGS: 00010246 CPU: 0 EIP is at submit_bh+0xe5/0xf0 EAX: 00040005 EBX: c49ab6d8 ECX: 00000000 EDX: c49ab6d8 ESI: 00000211 EDI: 00000211 EBP: 00000001 ESP: d6a5dccc DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 CR0: 8005003b CR2: 0901e008 CR3: 10b1c000 CR4: 000006d0 DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 DR6: ffff0ff0 DR7: 00000400 Process bash (pid: 26759, ti=d6a5c000 task=d79c8820 task.ti=d6a5c000) Stack: c49ab6d8 00000211 c590c400 c10c8e04 d0953e00 c49ab6d8 d8da2cc1 00000001 00000046 00000000 0196b320 d0953e00 c590c400 00000001 d8da2dbd 00000001 00000001 c1209e99 d0953e00 00000000 d8da2fad d8dac804 d0953f4c d8dab3b8 Call Trace: [<c10c8e04>] ? __sync_dirty_buffer+0x34/0xa0 [<d8da2cc1>] ? ext3_commit_super.constprop.27+0x51/0xe0 [ext3] [<d8da2dbd>] ? ext3_handle_error+0x6d/0xc0 [ext3] [<c1209e99>] ? printk+0x17/0x1b [<d8da2fad>] ? ext3_error+0x4d/0x60 [ext3] [<d8d9ec9c>] ? ext3_find_entry+0x11c/0x590 [ext3] [<c10b5fa5>] ? __d_lookup+0x125/0x1c0 [<c10b5fa5>] ? __d_lookup+0x125/0x1c0 [<d8d9f156>] ? ext3_lookup+0x46/0x100 [ext3] [<c10a9843>] ? __lookup_hash+0x43/0xe0 [<c10ab8e4>] ? do_lookup+0x2c4/0x350 [<c10ace2c>] ? path_lookupat+0xfc/0x6c0 [<c10ad418>] ? do_path_lookup+0x28/0x80 [<c10c8e04>] ? __sync_dirty_buffer+0x34/0xa0 [<d8da2cc1>] ? ext3_commit_super.constprop.27+0x51/0xe0 [ext3] [<d8da2dbd>] ? ext3_handle_error+0x6d/0xc0 [ext3] [<c1209e99>] ? printk+0x17/0x1b [<d8da2fad>] ? ext3_error+0x4d/0x60 [ext3] [<d8d9ec9c>] ? ext3_find_entry+0x11c/0x590 [ext3] [<c10b5fa5>] ? __d_lookup+0x125/0x1c0 [<c10b5fa5>] ? __d_lookup+0x125/0x1c0 [<d8d9f156>] ? ext3_lookup+0x46/0x100 [ext3] [<c10a9843>] ? __lookup_hash+0x43/0xe0 [<c10ab8e4>] ? do_lookup+0x2c4/0x350 [<c10ace2c>] ? path_lookupat+0xfc/0x6c0 [<c10ad418>] ? do_path_lookup+0x28/0x80 [<c10adcf3>] ? user_path_at_empty+0x43/0x80 [<c10add46>] ? user_path_at+0x16/0x20 [<c10a44ab>] ? vfs_fstatat+0x4b/0x80 [<c10a4518>] ? vfs_stat+0x18/0x20 [<c10a492e>] ? sys_stat64+0xe/0x30 [<c12103d0>] ? sysenter_do_call+0x12/0x26 Code: ff 46 30 89 f2 89 f8 e8 fa c6 04 00 8b 5e 10 89 f0 c1 e3 18 c1 fb 1f e8 da 4c 00 00 83 e3 a1 89 d8 5b 5e 5f c3 0f 0b 0f 0b 0f 0b <0f> 0b 0f 0b 8d b4 26 00 00 00 00 53 83 fa a1 89 c3 8b 48 3c 74 EIP: [<c10c8295>] submit_bh+0xe5/0xf0 SS:ESP 0068:d6a5dccc ---[ end trace c62efc9e706b2739 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
