[BUG] kdump won't work if invalid TSS fault happens in irq context
I write a module, and find kdump can't boot in the following case.
Kernel version is 3.4.24, Intel(R) Xeon(R) CPU E5620, and kernel v3.12
has the same problem too.
Here is the code:
struct timer_list g_timer;
void tmrhnd_invtssfault(unsigned long data)
{
long __res;
printk(KERN_EMERG "invalid TSS fault in interrupt context.\n");
__asm__ volatile("int $0x0A" : "=a"(__res):);
}
{
...
init_timer(_timer);
g_timer.expires = jiffies + 10;
g_timer.data = 0;
g_timer.function = tmrhnd_invtssfault;
add_timer(_timer);
...
}
Here is the log:
[ 87.801066] kpgenm: invalid TSS fault in interrupt context.
[ 87.976956] BUG: unable to handle kernel paging request at 81467489
[ 87.983979] IP: [] down_read_trylock+0x10/0x20
[ 87.990017] PGD 1a0d067 PUD 1a11063 PMD 14001e1
[ 87.994708] Oops: 0003 [#1] SMP
[ 87.997985] CPU 2
[ 87.999833] Modules linked in: kpgen(O) igb(O) netmap_lin(O) megaraid_sas
sr_mod mpt2sas raid_class uhci_hcd usb_storage ide_cd_mod ide_core mptctl
mptsas ata_piix acpi_cpufreq mperf tg3 usbhid hid nfs lockd fscache auth_rpcgss
nfs_acl sunrpc cdrom scsi_transport_sas e1000 mptscsih mptbase ipmi_devintf
ipmi_msghandler ext2 ac dm_mod af_packet af_key zlib_deflate loop coretemp
crc32c_intel ghash_clmulni_intel aesni_intel cryptd ipv6 aes_x86_64 aes_generic
pcspkr i2c_i801 mei(C) sg iTCO_wdt microcode iTCO_vendor_support dca rtc_cmos
container ext3 jbd mbcache i915 drm_kms_helper drm i2c_algo_bit i2c_core sd_mod
crc_t10dif ahci libahci ehci_hcd libata button usbcore usb_common thermal video
fan intel_agp intel_gtt processor thermal_sys hwmon scsi_dh_rdac scsi_dh_alua
scsi_dh_emc scsi_dh_hp_sw scsi_dh scsi_mod [last unloaded: igb]
[ 88.075236]
[ 88.076738] Pid: 1417644280, comm: ԨF.??? Tainted: G C O
3.4.24.13-0.1-default #1 INSYDE eChiefRiver/Type2 - Board Product Name1
[ 88.089319] RIP: 0010:[] []
down_read_trylock+0x10/0x20
[ 88.097783] RSP: 0018:8802547fbc88 EFLAGS: 00010002
[ 88.103101] RAX: 4c10246c894c1824 RBX: 0001 RCX: 81467429
[ 88.110238] RDX: 4c10246c894c1825 RSI: 0010 RDI: 81467489
[ 88.117373] RBP: 8802547fbc88 R08: 8802547fbfd8 R09:
[ 88.124511] R10: 88025f28dc50 R11: R12: 0001
[ 88.131648] R13: 0010 R14: 8802547fbda8 R15: 0028
[ 88.138786] FS: () GS:88025f28()
knlGS:
[ 88.146876] CS: 0010 DS: ES: CR0: 8005003b
[ 88.152626] CR2: 81467489 CR3: 01a0b000 CR4: 001407e0
[ 88.159764] DR0: DR1: DR2:
[ 88.166901] DR3: DR6: 0ff0 DR7: 0400
[ 88.174039] Process ԨF.??? (pid: 1417644280, threadinfo 8802547fa000,
task 8802547f8440)
[ 88.183082] Stack:
[ 88.185101] 8802547fbd98 8146aa24 a02ca194
81467489
[ 88.192601] 8802547f8440 81467429 8802547fbe78
814675f5
[ 88.200084] 0028 8802547fbe88
a02ca194
[ 88.207571] Call Trace:
[ 88.210031] [] do_page_fault+0x184/0x4b0
[ 88.215617] [] ? tmrhnd_invtssfault+0x14/0x20 [kpgen]
[ 88.222327] [] ? retint_signal+0x25/0x8c
[ 88.227901] [] ? restore_args+0x30/0x30
[ 88.233390] [] ? page_fault+0x25/0x30
[ 88.238706] [] ? tmrhnd_invtssfault+0x14/0x20 [kpgen]
[ 88.245411] [] ? tmrhnd_invtssfault+0x14/0x20 [kpgen]
[ 88.252112] [] ? restore_args+0x30/0x30
[ 88.257604] [] ? do_page_fault+0x34/0x4b0
[ 88.263265] [] page_fault+0x25/0x30
[ 88.268408] [] ? tmrhnd_invtssfault+0x14/0x20 [kpgen]
[ 88.275110] [] ? page_fault+0x25/0x30
[ 88.280427] [] ? tmrhnd_invtssfault+0x14/0x20 [kpgen]
[ 88.287130] [] ? tmrhnd_invtssfault+0x14/0x20 [kpgen]
[ 88.293835] [] ? restore_args+0x30/0x30
[ 88.299322] [] ? do_page_fault+0x34/0x4b0
[ 88.304987] [] ? start_secondary+0x7a/0x7c
[ 88.310733] Code: c0 83 fa 01 5b 0f 94 c0 41 5c c9 c3 90 90 90 90 90 90 90
90 90 90 90 90 90 90 90 55 48 89 e5 48 8b 07 48 89 c2 48 83 c2 01 7e 07 48
0f b1 17 75 f0 48 f7 d0 c9 48 c1 e8 3f c3 55 31 c0 48 ba
[ 88.330974] RIP [] down_read_trylock+0x10/0x20
[ 88.337097] RSP
[ 88.340590] CR2: 81467489
[ 88.343921] BUG: unable to handle kernel paging request at 81467489
[ 88.350926] IP: [] down_read_trylock+0x10/0x20
[ 88.356962] PGD 1a0d067 PUD 1a11063 PMD 14001e1
[ 88.361664] Oops: 0003 [#2] SMP
[ 88.364940] CPU 2
[ 88.366788] Modules linked in: kpgen(O) igb(O) netmap_lin(O) megaraid_sas
sr_mod mpt2sas raid_class uhci_hcd usb_storage ide_cd_mod ide_core mptctl
mptsas ata_piix acpi_cpufreq mperf tg3 usbhid hid nfs lockd fscache auth_rpcgss
nfs_acl sunrpc cdrom scsi_transport_sas e1000 mptscsih mptbase ipmi_devintf
ipmi_msghandler ext2 ac
[BUG] kdump won't work if invalid TSS fault happens in irq context
I write a module, and find kdump can't boot in the following case.
Kernel version is 3.4.24, Intel(R) Xeon(R) CPU E5620, and kernel v3.12
has the same problem too.
Here is the code:
struct timer_list g_timer;
void tmrhnd_invtssfault(unsigned long data)
{
long __res;
printk(KERN_EMERG invalid TSS fault in interrupt context.\n);
__asm__ volatile(int $0x0A : =a(__res):);
}
{
...
init_timer(g_timer);
g_timer.expires = jiffies + 10;
g_timer.data = 0;
g_timer.function = tmrhnd_invtssfault;
add_timer(g_timer);
...
}
Here is the log:
[ 87.801066] kpgenm: invalid TSS fault in interrupt context.
[ 87.976956] BUG: unable to handle kernel paging request at 81467489
[ 87.983979] IP: [81099070] down_read_trylock+0x10/0x20
[ 87.990017] PGD 1a0d067 PUD 1a11063 PMD 14001e1
[ 87.994708] Oops: 0003 [#1] SMP
[ 87.997985] CPU 2
[ 87.999833] Modules linked in: kpgen(O) igb(O) netmap_lin(O) megaraid_sas
sr_mod mpt2sas raid_class uhci_hcd usb_storage ide_cd_mod ide_core mptctl
mptsas ata_piix acpi_cpufreq mperf tg3 usbhid hid nfs lockd fscache auth_rpcgss
nfs_acl sunrpc cdrom scsi_transport_sas e1000 mptscsih mptbase ipmi_devintf
ipmi_msghandler ext2 ac dm_mod af_packet af_key zlib_deflate loop coretemp
crc32c_intel ghash_clmulni_intel aesni_intel cryptd ipv6 aes_x86_64 aes_generic
pcspkr i2c_i801 mei(C) sg iTCO_wdt microcode iTCO_vendor_support dca rtc_cmos
container ext3 jbd mbcache i915 drm_kms_helper drm i2c_algo_bit i2c_core sd_mod
crc_t10dif ahci libahci ehci_hcd libata button usbcore usb_common thermal video
fan intel_agp intel_gtt processor thermal_sys hwmon scsi_dh_rdac scsi_dh_alua
scsi_dh_emc scsi_dh_hp_sw scsi_dh scsi_mod [last unloaded: igb]
[ 88.075236]
[ 88.076738] Pid: 1417644280, comm: ԨF.??? Tainted: G C O
3.4.24.13-0.1-default #1 INSYDE eChiefRiver/Type2 - Board Product Name1
[ 88.089319] RIP: 0010:[81099070] [81099070]
down_read_trylock+0x10/0x20
[ 88.097783] RSP: 0018:8802547fbc88 EFLAGS: 00010002
[ 88.103101] RAX: 4c10246c894c1824 RBX: 0001 RCX: 81467429
[ 88.110238] RDX: 4c10246c894c1825 RSI: 0010 RDI: 81467489
[ 88.117373] RBP: 8802547fbc88 R08: 8802547fbfd8 R09:
[ 88.124511] R10: 88025f28dc50 R11: R12: 0001
[ 88.131648] R13: 0010 R14: 8802547fbda8 R15: 0028
[ 88.138786] FS: () GS:88025f28()
knlGS:
[ 88.146876] CS: 0010 DS: ES: CR0: 8005003b
[ 88.152626] CR2: 81467489 CR3: 01a0b000 CR4: 001407e0
[ 88.159764] DR0: DR1: DR2:
[ 88.166901] DR3: DR6: 0ff0 DR7: 0400
[ 88.174039] Process ԨF.??? (pid: 1417644280, threadinfo 8802547fa000,
task 8802547f8440)
[ 88.183082] Stack:
[ 88.185101] 8802547fbd98 8146aa24 a02ca194
81467489
[ 88.192601] 8802547f8440 81467429 8802547fbe78
814675f5
[ 88.200084] 0028 8802547fbe88
a02ca194
[ 88.207571] Call Trace:
[ 88.210031] [8146aa24] do_page_fault+0x184/0x4b0
[ 88.215617] [a02ca194] ? tmrhnd_invtssfault+0x14/0x20 [kpgen]
[ 88.222327] [81467489] ? retint_signal+0x25/0x8c
[ 88.227901] [81467429] ? restore_args+0x30/0x30
[ 88.233390] [814675f5] ? page_fault+0x25/0x30
[ 88.238706] [a02ca194] ? tmrhnd_invtssfault+0x14/0x20 [kpgen]
[ 88.245411] [a02ca194] ? tmrhnd_invtssfault+0x14/0x20 [kpgen]
[ 88.252112] [81467429] ? restore_args+0x30/0x30
[ 88.257604] [8146a8d4] ? do_page_fault+0x34/0x4b0
[ 88.263265] [814675f5] page_fault+0x25/0x30
[ 88.268408] [a02ca194] ? tmrhnd_invtssfault+0x14/0x20 [kpgen]
[ 88.275110] [814675f5] ? page_fault+0x25/0x30
[ 88.280427] [a02ca194] ? tmrhnd_invtssfault+0x14/0x20 [kpgen]
[ 88.287130] [a02ca194] ? tmrhnd_invtssfault+0x14/0x20 [kpgen]
[ 88.293835] [81467429] ? restore_args+0x30/0x30
[ 88.299322] [8146a8d4] ? do_page_fault+0x34/0x4b0
[ 88.304987] [8145c19e] ? start_secondary+0x7a/0x7c
[ 88.310733] Code: c0 83 fa 01 5b 0f 94 c0 41 5c c9 c3 90 90 90 90 90 90 90
90 90 90 90 90 90 90 90 55 48 89 e5 48 8b 07 48 89 c2 48 83 c2 01 7e 07 f0 48
0f b1 17 75 f0 48 f7 d0 c9 48 c1 e8 3f c3 55 31 c0 48 ba
[ 88.330974] RIP [81099070] down_read_trylock+0x10/0x20
[ 88.337097] RSP 8802547fbc88
[ 88.340590] CR2: 81467489
[ 88.343921] BUG: unable to handle kernel paging request at 81467489
[ 88.350926] IP: [81099070] down_read_trylock+0x10/0x20
[ 88.356962] PGD 1a0d067 PUD 1a11063 PMD 14001e1
[ 88.361664] Oops: 0003
