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IDProjectCategoryView StatusLast Update
0017898CentOS-8kernelpublic2020-11-30 19:20
Reportertotto 
PrioritynormalSeveritycrashReproducibilityhave not tried
Status newResolutionopen 
Product Version8.2.2004 
Target VersionFixed in Version 
Summary0017898: Kernel crash in nfs_put_lock_context (plus podman)
DescriptionThe kernel crashed with the backtrace below, from vmcore-dmesg.txt.

Possibly related: This was about an hour after cleaning up a TCP Port exhaustion situation (by terminating several processes), system load about 20%.

The system was running a podman container (not started with "--priviledged", only "--cap-add=SYS_PTRACE", however running as root). Podman version 2.1.1 from the podman homepage (not the older version included in CentOS).

The process listed in the backtrace was running inside the container as a non-root user, and the nfs mount of the host kernel was mounted into the container. No previous Kernel-Oopses in the dmesg.

Kernel version 4.18.0-193.19.1.el8_2.x86_64, hardware with ECC RAM.
Additional Information[4479148.613218] ...
[4488618.199846] BUG: unable to handle kernel NULL pointer dereference at 0000000000000030
[4488618.199903] PGD 441997e067 P4D 441997e067 PUD 43d9dda067 PMD 0
[4488618.199941] Oops: 0000 [#1] SMP NOPTI
[4488618.199966] CPU: 126 PID: 3540969 Comm: cpptools Kdump: loaded Not tainted 4.18.0-193.19.1.el8_2.x86_64 #1
[4488618.200012] Hardware name: HPE ProLiant DL385 Gen10 Plus/ProLiant DL385 Gen10 Plus, BIOS A42 04/29/2020
[4488618.200073] RIP: 0010:nfs_put_lock_context+0x12/0x70 [nfs]
[4488618.200104] Code: 00 0f 1f 40 00 5b 89 d0 5d 41 5c c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 53 48 8b 47 18 48 89 fb 48 8b 40 48 <48> 8b 68 30 48 81 c5 88 00 00 00 48 89 ee e8 6b 0c 33 d3 84 c0 75
[4488618.200188] RSP: 0018:ffffaee3ecc23d98 EFLAGS: 00010296
[4488618.200217] RAX: 0000000000000000 RBX: ffff88f336415480 RCX: 0000000000000000
[4488618.200253] RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88f336415480
[4488618.200289] RBP: ffff88f336415480 R08: 0000000001000000 R09: ffffaee3ecc23c88
[4488618.200326] R10: ffffee2f60a41d80 R11: ffffffffc0d0f0c0 R12: ffff893038cad7a0
[4488618.200361] R13: 0000000000000000 R14: 0000000000000006 R15: ffff88f8f06f5aa0
[4488618.200399] FS: 00007f2dd2ffd700(0000) GS:ffff89303b380000(0000) knlGS:0000000000000000
[4488618.200439] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[4488618.200469] CR2: 0000000000000030 CR3: 0000006a6e982000 CR4: 0000000000340ee0
[4488618.200505] Call Trace:
[4488618.200538] do_unlk+0x98/0xe0 [nfs]
[4488618.200565] do_lock_file_wait.part.33+0x38/0xc0
[4488618.200595] ? _cond_resched+0x15/0x30
[4488618.200619] ? kmem_cache_alloc+0x14d/0x1b0
[4488618.200645] fcntl_setlk+0xe8/0x2f0
[4488618.200670] ? __seccomp_filter+0x3e/0x490
[4488618.200697] do_fcntl+0x42b/0x620
[4488618.200720] __x64_sys_fcntl+0x8b/0xb0
[4488618.200745] do_syscall_64+0x5b/0x1a0
[4488618.200769] entry_SYSCALL_64_after_hwframe+0x65/0xca
[4488618.200799] RIP: 0033:0x7f2fd2bb7914
[4488618.201923] Code: 66 0f 1f 44 00 00 f3 0f 1e fa 48 83 ec 18 64 48 8b 04 25 28 00 00 00 48 89 44 24 08 31 c0 83 fe 09 74 2b b8 48 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 44 48 8b 4c 24 08 64 48 33 0c 25 28 00 00 00
[4488618.204094] RSP: 002b:00007f2dd2ffadd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000048
[4488618.205188] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007f2fd2bb7914
[4488618.206270] RDX: 00007f2dd2ffaed8 RSI: 0000000000000006 RDI: 0000000000000005
[4488618.207324] RBP: 0000000000000009 R08: 00007f2d63f2e888 R09: 0000000000000001
[4488618.208385] R10: 00007f2d48110ba0 R11: 0000000000000293 R12: 0000000000000010
[4488618.209460] R13: 00007f2db0033950 R14: 00007f2db000c0e8 R15: 00007f2d63f313d8
[4488618.210545] Modules linked in: netlink_diag binfmt_misc macvlan overlay nfsv3 nfs_acl arc4 libarc4 nfs md4 lockd nls_utf8 grace fscache cifs dns_resolver bonding sunrpc xfs libcrc32c vfat fat edac_mce_amd kvm_amd kvm irqbypass ipmi_ssif crct10dif_pclmul ses cdc_eem usbnet enclosure crc32_pclmul mii ghash_clmulni_intel pcspkr hpwdt hpilo ccp sp5100_tco ipmi_si ipmi_devintf k10temp i2c_piix4 acpi_tad ipmi_msghandler wmi acpi_power_meter acpi_cpufreq ip_tables ext4 mbcache jbd2 sr_mod cdrom sg raid1 mgag200 drm_vram_helper ttm drm_kms_helper qede syscopyarea sysfillrect sysimgblt fb_sys_fops drm qed crc32c_intel usb_storage igb smartpqi nvme scsi_transport_sas dca nvme_core i2c_algo_bit crc8 dm_mirror dm_region_hash dm_log dm_mod fuse
[4488618.217513] CR2: 0000000000000030
Tagskernel, nfs, panic, podman

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Issue History

Date Modified Username Field Change
2020-11-30 19:19 totto New Issue
2020-11-30 19:19 totto Tag Attached: kernel
2020-11-30 19:19 totto Tag Attached: nfs
2020-11-30 19:19 totto Tag Attached: panic
2020-11-30 19:20 totto Tag Attached: podman