Hi,
I ran into a NULL dereference bug on USB key hot remove, which should
be caused by the below skdp->device reference
static int sd_revalidate_disk(struct gendisk *disk)
{
struct scsi_disk *sdkp = scsi_disk(disk);
==> struct scsi_device *sdp = sdkp->device;
judging from the scripts/decodecode output:
All code
========
0: 55 push %rbp
1: 53 push %rbx
2: 48 81 ec 88 00 00 00 sub $0x88,%rsp
9: 48 8b af 38 03 00 00 mov 0x338(%rdi),%rbp
10: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
17: 00 00
19: 48 89 44 24 78 mov %rax,0x78(%rsp)
1e: 31 c0 xor %eax,%eax
20: 8b 05 1c 9b 05 00 mov 0x59b1c(%rip),%eax # 0x59b42
26: 48 89 7c 24 48 mov %rdi,0x48(%rsp)
2b:* 4c 8b 7d 08 mov 0x8(%rbp),%r15 <-- trapping instruction
2f: c1 e8 15 shr $0x15,%eax
32: 83 e0 07 and $0x7,%eax
35: 83 f8 03 cmp $0x3,%eax
38: 76 43 jbe 0x7d
3a: 48 rex.W
3b: 8b .byte 0x8b
3c: 8d .byte 0x8d
3d: 88 02 mov %al,(%rdx)
...
or gdb disassemble /usr/lib/debug/lib/modules/3.2.0-1-amd64/kernel/drivers/scsi/sd_mod.ko:
Dump of assembler code for function sd_revalidate_disk:
0x00000000000027da <+0>: push %r15
0x00000000000027dc <+2>: push %r14
0x00000000000027de <+4>: push %r13
0x00000000000027e0 <+6>: push %r12
0x00000000000027e2 <+8>: push %rbp
0x00000000000027e3 <+9>: push %rbx
0x00000000000027e4 <+10>: sub $0x88,%rsp
0x00000000000027eb <+17>: mov 0x338(%rdi),%rbp
0x00000000000027f2 <+24>: mov %gs:0x28,%rax
0x00000000000027fb <+33>: mov %rax,0x78(%rsp)
0x0000000000002800 <+38>: xor %eax,%eax
0x0000000000002802 <+40>: mov 0x0(%rip),%eax # 0x2808 <sd_revalidate_disk+46>
0x0000000000002808 <+46>: mov %rdi,0x48(%rsp)
0x000000000000280d <+51>: mov 0x8(%rbp),%r15
0x0000000000002811 <+55>: shr $0x15,%eax
0x0000000000002814 <+58>: and $0x7,%eax
0x0000000000002817 <+61>: cmp $0x3,%eax
0x000000000000281a <+64>: jbe 0x285f <sd_revalidate_disk+133>
0x000000000000281c <+66>: mov 0x288(%rbp),%rcx
0x0000000000002823 <+73>: lea 0x138(%r15),%rsi
0x000000000000282a <+80>: test %rcx,%rcx
I'm not familiar with this code and wonder who can be clearing the
sdkp->device before sd_revalidate_disk()?
Thanks,
Fengguang
PS. the related dmesg
Mar 5 13:23:42 wfg-t420 kernel: [ 2402.297504] usb 1-1.1: new full-speed USB device number 7 using ehci_hcd
Mar 5 13:23:42 wfg-t420 kernel: [ 2402.391774] usb 1-1.1: New USB device found, idVendor=0421, idProduct=002d
Mar 5 13:23:42 wfg-t420 kernel: [ 2402.391779] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Mar 5 13:23:42 wfg-t420 kernel: [ 2402.391782] usb 1-1.1: Product: Nokia 6120 classic
Mar 5 13:23:42 wfg-t420 kernel: [ 2402.391784] usb 1-1.1: Manufacturer: Nokia
Mar 5 13:23:42 wfg-t420 kernel: [ 2402.391786] usb 1-1.1: SerialNumber: 359807018700505
Mar 5 13:23:42 wfg-t420 kernel: [ 2402.392907] scsi8 : usb-storage 1-1.1:1.0
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.388301] scsi 8:0:0:0: Direct-Access Nokia S60 1.0 PQ: 0 ANSI: 0
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.390374] sd 8:0:0:0: [sdd] Adjusting the sector count from its reported value: 3987209
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.390384] sd 8:0:0:0: [sdd] 3987208 512-byte logical blocks: (2.04 GB/1.90 GiB)
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.391243] sd 8:0:0:0: [sdd] Write Protect is off
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.391248] sd 8:0:0:0: [sdd] Mode Sense: 03 00 00 00
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.392527] sd 8:0:0:0: [sdd] No Caching mode page present
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.392532] sd 8:0:0:0: [sdd] Assuming drive cache: write through
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.394228] sd 8:0:0:0: [sdd] Adjusting the sector count from its reported value: 3987209
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.395602] sd 8:0:0:0: [sdd] No Caching mode page present
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.395606] sd 8:0:0:0: [sdd] Assuming drive cache: write through
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.649858] sdd:
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.651779] sd 8:0:0:0: [sdd] Adjusting the sector count from its reported value: 3987209
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.653390] sd 8:0:0:0: [sdd] No Caching mode page present
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.653394] sd 8:0:0:0: [sdd] Assuming drive cache: write through
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.653397] sd 8:0:0:0: [sdd] Attached SCSI removable disk
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.926415] usb 1-1.1: USB disconnect, device number 7
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927327] scsi 8:0:0:0: [sdd] killing request
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927345] scsi 8:0:0:0: [sdd] Unhandled error code
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927348] scsi 8:0:0:0: [sdd] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927354] scsi 8:0:0:0: [sdd] CDB: Read(10): 28 00 00 00 01 98 00 00 08 00
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927367] end_request: I/O error, dev sdd, sector 408
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927371] Buffer I/O error on device sdd, logical block 51
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927469] Buffer I/O error on device sdd, logical block 51
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927493] Buffer I/O error on device sdd, logical block 0
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927498] Buffer I/O error on device sdd, logical block 0
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927513] Buffer I/O error on device sdd, logical block 2
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927518] Buffer I/O error on device sdd, logical block 2
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927524] Buffer I/O error on device sdd, logical block 0
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927530] Buffer I/O error on device sdd, logical block 0
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927539] Buffer I/O error on device sdd, logical block 0
Mar 5 13:23:43 wfg-t420 kernel: [ 2403.927549] Buffer I/O error on device sdd, logical block 512
Mar 5 13:23:43 wfg-t420 kernel: [ 2404.141318] usb 1-1.1: new full-speed USB device number 8 using ehci_hcd
Mar 5 13:23:44 wfg-t420 kernel: [ 2404.235932] usb 1-1.1: New USB device found, idVendor=0421, idProduct=002d
Mar 5 13:23:44 wfg-t420 kernel: [ 2404.235938] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Mar 5 13:23:44 wfg-t420 kernel: [ 2404.235941] usb 1-1.1: Product: Nokia 6120 classic
Mar 5 13:23:44 wfg-t420 kernel: [ 2404.235943] usb 1-1.1: Manufacturer: Nokia
Mar 5 13:23:44 wfg-t420 kernel: [ 2404.235945] usb 1-1.1: SerialNumber: 359807018700505
Mar 5 13:23:44 wfg-t420 kernel: [ 2404.237236] scsi9 : usb-storage 1-1.1:1.0
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.235887] scsi 9:0:0:0: Direct-Access Nokia S60 1.0 PQ: 0 ANSI: 0
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.239196] sd 9:0:0:0: [sdd] Adjusting the sector count from its reported value: 3987209
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.239213] sd 9:0:0:0: [sdd] 3987208 512-byte logical blocks: (2.04 GB/1.90 GiB)
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.240071] sd 9:0:0:0: [sdd] Write Protect is off
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.240080] sd 9:0:0:0: [sdd] Mode Sense: 03 00 00 00
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.240807] sd 9:0:0:0: [sdd] No Caching mode page present
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.240817] sd 9:0:0:0: [sdd] Assuming drive cache: write through
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.253385] sd 9:0:0:0: [sdd] Adjusting the sector count from its reported value: 3987209
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.254768] sd 9:0:0:0: [sdd] No Caching mode page present
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.254771] sd 9:0:0:0: [sdd] Assuming drive cache: write through
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.261000] sdd:
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.262613] sd 9:0:0:0: [sdd] Adjusting the sector count from its reported value: 3987209
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.266226] sd 9:0:0:0: [sdd] No Caching mode page present
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.266230] sd 9:0:0:0: [sdd] Assuming drive cache: write through
Mar 5 13:23:45 wfg-t420 kernel: [ 2405.266233] sd 9:0:0:0: [sdd] Attached SCSI removable disk
Mar 5 13:23:48 wfg-t420 kernel: [ 2408.563885] FAT-fs (sdd): utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive!
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.906115] usb 1-1.1: USB disconnect, device number 8
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.906525] scsi 9:0:0:0: killing request
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.907220] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.907323] IP: [<ffffffffa00737e9>] sd_revalidate_disk+0x33/0x1603 [sd_mod]
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.907412] PGD 97c09067 PUD ba197067 PMD 0
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.907452] Oops: 0000 [#1] SMP
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.907484] CPU 3
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.907500] Modules linked in: nls_utf8 nls_cp437 vfat fat uas usb_storage xt_tcpudp iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 xts gf128mul ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables acpi_cpufreq mperf cpufreq_stats cpufreq_userspace cpufreq_powersave cpufreq_conservative input_polldev bnep rfcomm binfmt_misc fuse tun kvm_intel kvm xfs ext3 jbd reiserfs dm_crypt aesni_intel cryptd aes_x86_64 aes_generic snd_hda_codec_hdmi snd_hda_codec_conexant joydev btusb bluetooth snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm uvcvideo snd_seq_midi videodev media hid_logitech_dj v4l2_compat_ioctl32 snd_rawmidi arc4 snd_seq_midi_event snd_seq iwlwifi tpm_tis psmouse snd_timer tpm mac80211 pcspkr serio_raw i2c_i801 evdev thinkpad_acpi snd_seq_device tpm_bios ac battery nvram power_supply cfg80211 snd i915 rfkill drm_kms_helper soundcore snd_page_alloc drm i2c_algo_bit iTCO_wdt i2c_core iTCO_vendor_support wmi
Mar 5 13:29:42 wfg-t420 kernel: video button processor ext4 mbcache jbd2 crc16 btrfs zlib_deflate crc32c libcrc32c dm_mod raid10 raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx raid1 raid0 multipath linear md_mod sd_mod crc_t10dif usbhid hid ahci libahci libata firewire_ohci scsi_mod ehci_hcd firewire_core crc_itu_t sdhci_pci sdhci mmc_core thermal thermal_sys usbcore usb_common e1000e [last unloaded: scsi_wait_scan]
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.908740]
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.908755] Pid: 13846, comm: hald-addon-stor Not tainted 3.2.0-1-amd64 #1 LENOVO 4236L56/4236L56
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.908827] RIP: 0010:[<ffffffffa00737e9>] [<ffffffffa00737e9>] sd_revalidate_disk+0x33/0x1603 [sd_mod]
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.908905] RSP: 0018:ffff880097fe7af8 EFLAGS: 00010246
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.908945] RAX: 0000000000000000 RBX: ffff8800426dd980 RCX: 0000000000000001
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.908999] RDX: 0000000000000001 RSI: ffff880097d6b640 RDI: ffff8800ba143800
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909051] RBP: 0000000000000000 R08: 00000008ffffffff R09: ffff88008ffe88a0
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909103] R10: ffff88008ffe88a0 R11: ffff88008ffe88a0 R12: ffff8800ba143800
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909156] R13: 0000000000000000 R14: ffff8800426dd998 R15: ffff8800426dd980
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909210] FS: 00007faae3ef37a0(0000) GS:ffff88011e2c0000(0000) knlGS:0000000000000000
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909276] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909337] CR2: 0000000000000008 CR3: 00000000b3bf8000 CR4: 00000000000406e0
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909415] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909495] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909571] Process hald-addon-stor (pid: 13846, threadinfo ffff880097fe6000, task ffff88008ffe88a0)
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909662] Stack:
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909685] ffff88011964b800 ffffffff8110bb0b ffffffff8168cb00 ffff8800ba143848
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909770] 0000000000000000 ffff8800ba143800 000000000000001d ffff8800426dd998
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909855] ffff8800426dd980 ffff8800ba143800 ffff8800426dd980 ffff8800426dd980
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909950] Call Trace:
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.909986] [<ffffffff8110bb0b>] ? iget5_locked+0x5c/0x127
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910068] [<ffffffff8114717d>] ? rescan_partitions+0xac/0x41b
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910075] [<ffffffff81120a84>] ? __blkdev_get+0x1a6/0x37e
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910094] [<ffffffff81120f03>] ? blkdev_get+0x2a7/0x2a7
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910098] [<ffffffff81120e23>] ? blkdev_get+0x1c7/0x2a7
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910102] [<ffffffff81120f03>] ? blkdev_get+0x2a7/0x2a7
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910106] [<ffffffff810f7392>] ? __dentry_open+0x19c/0x2b3
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910110] [<ffffffff81100748>] ? dget+0x12/0x1e
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910113] [<ffffffff81103742>] ? do_last+0x552/0x58c
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910116] [<ffffffff81103d74>] ? path_openat+0xce/0x31c
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910131] [<ffffffffa00acfb1>] ? ioctl_internal_command.constprop.4+0x62/0x15c [scsi_mod]
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910136] [<ffffffff81104084>] ? do_filp_open+0x2a/0x6e
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910143] [<ffffffff8133f50f>] ? _cond_resched+0x7/0x1c
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910148] [<ffffffff811b0f49>] ? __strncpy_from_user+0x18/0x48
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910152] [<ffffffff8110cd2b>] ? alloc_fd+0x64/0x109
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910156] [<ffffffff810f8254>] ? do_sys_open+0x5e/0xe5
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910161] [<ffffffff813457d2>] ? system_call_fastpath+0x16/0x1b
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910164] Code: 55 53 48 81 ec 88 00 00 00 48 8b af 38 03 00 00 65 48 8b 04 25 28 00 00 00 48 89 44 24 78 31 c0 8b 05 1c 9b 05 00 48 89 7c 24 48 <4c> 8b 7d 08 c1 e8 15 83 e0 07 83 f8 03 76 43 48 8b 8d 88 02 00
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910194] RIP [<ffffffffa00737e9>] sd_revalidate_disk+0x33/0x1603 [sd_mod]
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910206] RSP <ffff880097fe7af8>
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.910208] CR2: 0000000000000008
Mar 5 13:29:42 wfg-t420 kernel: [ 2761.983071] ---[ end trace f521706016199557 ]---
Mar 5 13:29:42 wfg-t420 kernel: [ 2762.121024] usb 1-1.1: new full-speed USB device number 9 using ehci_hcd
Mar 5 13:29:42 wfg-t420 kernel: [ 2762.215163] usb 1-1.1: New USB device found, idVendor=0421, idProduct=002d
Mar 5 13:29:42 wfg-t420 kernel: [ 2762.215169] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Mar 5 13:29:42 wfg-t420 kernel: [ 2762.215172] usb 1-1.1: Product: Nokia 6120 classic
Mar 5 13:29:42 wfg-t420 kernel: [ 2762.215174] usb 1-1.1: Manufacturer: Nokia
Mar 5 13:29:42 wfg-t420 kernel: [ 2762.215176] usb 1-1.1: SerialNumber: 359807018700505
Mar 5 13:29:42 wfg-t420 kernel: [ 2762.216286] scsi10 : usb-storage 1-1.1:1.0
Mar 5 13:29:43 wfg-t420 kernel: [ 2762.494045] usb 1-1.1: USB disconnect, device number 9
Mar 5 13:29:44 wfg-t420 kernel: [ 2763.457990] usb 1-1.1: new full-speed USB device number 10 using ehci_hcd
Mar 5 13:29:44 wfg-t420 kernel: [ 2763.552227] usb 1-1.1: New USB device found, idVendor=0421, idProduct=002d
Mar 5 13:29:44 wfg-t420 kernel: [ 2763.552232] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Mar 5 13:29:44 wfg-t420 kernel: [ 2763.552235] usb 1-1.1: Product: Nokia 6120 classic
Mar 5 13:29:44 wfg-t420 kernel: [ 2763.552237] usb 1-1.1: Manufacturer: Nokia
Mar 5 13:29:44 wfg-t420 kernel: [ 2763.552239] usb 1-1.1: SerialNumber: 359807018700505
Mar 5 13:29:44 wfg-t420 kernel: [ 2763.553231] scsi11 : usb-storage 1-1.1:1.0
Mar 5 13:29:45 wfg-t420 kernel: [ 2764.548647] scsi 11:0:0:0: Direct-Access Nokia S60 1.0 PQ: 0 ANSI: 0
Mar 5 13:29:45 wfg-t420 kernel: [ 2764.550847] sd 11:0:0:0: [sdd] Adjusting the sector count from its reported value: 3987209
Mar 5 13:29:45 wfg-t420 kernel: [ 2764.550854] sd 11:0:0:0: [sdd] 3987208 512-byte logical blocks: (2.04 GB/1.90 GiB)
Mar 5 13:29:45 wfg-t420 kernel: [ 2764.551589] sd 11:0:0:0: [sdd] Write Protect is off
Mar 5 13:29:45 wfg-t420 kernel: [ 2764.551593] sd 11:0:0:0: [sdd] Mode Sense: 03 00 00 00
Mar 5 13:29:45 wfg-t420 kernel: [ 2764.553627] sd 11:0:0:0: [sdd] No Caching mode page present
Mar 5 13:29:45 wfg-t420 kernel: [ 2764.553632] sd 11:0:0:0: [sdd] Assuming drive cache: write through
Mar 5 13:30:35 wfg-t420 kernel: [ 2814.560199] SysRq : Emergency Sync
Mar 5 13:30:37 wfg-t420 kernel: [ 2816.768298] Emergency Sync complete
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