Bug List: (3 of 7)
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Bug 1977916 - [RHEL-9.0][PANIC] Unable to handle kernel paging request at virtual address 0058272cb3040f50
Summary: [RHEL-9.0][PANIC] Unable to handle kernel paging request at virtual address 0...
Keywords:
Status: CLOSED WORKSFORME
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: kernel
Version: 9.0
Hardware: aarch64
OS: Linux
high
high
Target Milestone: beta
: ---
Assignee: Kernel Drivers
QA Contact: PaulB
URL:
Whiteboard:
Depends On:
Blocks: 2041894
TreeView+ depends on / blocked
 
Reported: 2021-06-30 17:28 UTC by PaulB
Modified: 2022-02-15 05:32 UTC (History)
15 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-02-11 22:09:14 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pbunyan: needinfo-

Attachments (Terms of Use)

Description PaulB 2021-06-30 17:28:20 UTC 
Description of problem:
The following PANIC is seen during testing RHEL9 on anaarch64 hpe-apollo-cn99xx-14-vm.

Version-Release number of selected component (if applicable):
 distro: RHEL-9.0.0-20210626.0
 kernel: 5.13.0-0.rc7.51.el9
 task: /kernel/filesystems/cifs/connectathon 1.1-9

How reproducible:


Steps to Reproduce:
1. Install  RHEL-9.0.0-20210626.0 [5.13.0-0.rc7.51.el9] on the target system listed in comment #1.
2. run 
3.

Actual results:
https://beaker.engineering.redhat.com/recipes/10205911#task128050166
https://beaker-archive.host.prod.eng.bos.redhat.com/beaker-logs/2021/06/55108/5510872/10205911/console.log
---%<-snip->%---
[ 1128.005946] restraintd[869]: ** Running task: 128050166 [/kernel/filesystems/cifs/connectathon] 
[ 1156.636333] Key type dns_resolver registered 
[ 1156.705145] Key type cifs.spnego registered 
[ 1156.706152] Key type cifs.idmap registered 
[ 1156.707740] CIFS: No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3.1.1), from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3.1.1 (or even SMB3 or SMB2.1) specify vers=1.0 on mount. 
[ 1156.714151] CIFS: Attempting to mount \\hpe-apollo-cn99xx-14-vm-09.khw4.lab.eng.bos.redhat.com\testuser 
[ 1156.811100] CIFS: VFS: \\hpe-apollo-cn99xx-14-vm-09.khw4.lab.eng.bos.redhat.com No task to wake, unknown frame received! NumMids 6 
[ 1177.375105] CIFS: Attempting to mount \\hpe-apollo-cn99xx-14-vm-09.khw4.lab.eng.bos.redhat.com\testuser 
[ 1177.460714] Unable to handle kernel paging request at virtual address 0058272cb3040f50 
[ 1177.462547] Mem abort info: 
[ 1177.463175]   ESR = 0x96000004 
[ 1177.463857]   EC = 0x25: DABT (current EL), IL = 32 bits 
[ 1177.465035]   SET = 0, FnV = 0 
[ 1177.465714]   EA = 0, S1PTW = 0 
[ 1177.466418] Data abort info: 
[ 1177.467065]   ISV = 0, ISS = 0x00000004 
[ 1177.468006]   CM = 0, WnR = 0 
[ 1177.469853] [0058272cb3040f50] address between user and kernel address ranges 
[ 1177.471823] Internal error: Oops: 96000004 [#1] SMP 
[ 1177.473652] Modules linked in: md4 cifs libdes libarc4 dns_resolver nls_koi8_u nls_cp932 ts_kmp nls_utf8 rfkill sunrpc vfat fat fuse xfs libcrc32c crct10dif_ce ghash_ce sha2_ce sha256_arm64 sha1_ce virtio_blk virtio_console virtio_net net_failover failover virtio_mmio dm_mirror dm_region_hash dm_log dm_mod aes_neon_bs [last unloaded: zram] 
[ 1177.484329] CPU: 3 PID: 101924 Comm: smbd Tainted: G               X --------- ---  5.13.0-0.rc7.51.el9.aarch64 #1 
[ 1177.487793] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 
[ 1177.490500] pstate: a0400005 (NzCv daif +PAN -UAO -TCO BTYPE=--) 
[ 1177.492065] pc : kmem_cache_alloc+0xd0/0x2e0 
[ 1177.493214] lr : kmem_cache_alloc+0xa0/0x2e0 
[ 1177.494258] sp : ffff800018a2fd10 
[ 1177.495070] x29: ffff800018a2fd10 x28: ffff10320468e040 x27: 000000000002d192 
[ 1177.496822] x26: 0000000000000000 x25: ffffb4433d730000 x24: ffffb4433b849df0 
[ 1177.498915] x23: ffff103200013500 x22: 0000000000000cc0 x21: 0000000000000000 
[ 1177.500647] x20: ffffb4433ce93510 x19: ffff103200013500 x18: 0000000000000000 
[ 1177.502377] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 
[ 1177.504096] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 
[ 1177.505806] x11: 0000000000000000 x10: 0000000000000000 x9 : ffffb4433bac86f4 
[ 1177.507545] x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 
[ 1177.509629] x5 : 0000000000000001 x4 : ffff1032bf6a3510 x3 : 736a265de9486ed5 
[ 1177.511373] x2 : 0000000000000050 x1 : 500f04b32c2758c2 x0 : c258272cb3040f00 
[ 1177.513106] Call trace: 
[ 1177.513705]  kmem_cache_alloc+0xd0/0x2e0 
[ 1177.514672]  prepare_creds+0x30/0x264 
[ 1177.515589]  __sys_setresuid+0xa4/0x230 
[ 1177.516529]  __arm64_sys_setresuid+0x2c/0x40 
[ 1177.517569]  invoke_syscall.constprop.0+0x58/0xf0 
[ 1177.518967]  el0_svc_common.constprop.0+0x5c/0x164 
[ 1177.520138]  do_el0_svc+0x34/0xcc 
[ 1177.520948]  el0_svc+0x2c/0x90 
[ 1177.521736]  el0_sync_handler+0xa4/0x150 
[ 1177.522721]  el0_sync+0x198/0x1c0 
[ 1177.523560] Code: b9402a62 f9405e63 8b020001 dac00c21 (f862681a)  
[ 1177.525022] ---[ end trace df006d3d888c98f7 ]--- 
[ 1177.526134] Kernel panic - not syncing: Oops: Fatal exception 
[ 1177.527530] SMP: stopping secondary CPUs 
[ 1177.529088] Kernel Offset: 0x34432b780000 from 0xffff800010000000 
[ 1177.530575] PHYS_OFFSET: 0xfff0efcf00000000 
[ 1177.531599] CPU features: 0x00200251,23200840 
[ 1177.532672] Memory Limit: none 
[ 1177.533429] ---[ end Kernel panic - not syncing: Oops: Fatal exception ]--- 

---%<-snip->%---


Expected results:
No PANICs are expected.
Successful completion of task.

Additional info:
Comment 1 PaulB 2021-06-30 18:09:42 UTC 
All,
Here is a reproducer on a baremetal aarch54 system during the nfs/connectathon test:
 host: gigabyte-r120-04
 distro: RHEL-9.0.0-20210626.0
 kernel: 5.13.0-0.rc7.51.el9
 task: /kernel/filesystems/nfs/connectathon 3.0-95



https://beaker.engineering.redhat.com/recipes/10205916#task128050274
https://beaker-archive.host.prod.eng.bos.redhat.com/beaker-logs/2021/06/55108/5510872/10205916/console.log
---%<-snip->%---
[ 2776.764798] restraintd[1295]: ** Running task: 128050274 [/kernel/filesystems/nfs/connectathon] 
[-- MARK -- Mon Jun 28 04:45:00 2021] 
[ 2837.041406] restraintd[1295]: *** Current Time: Mon Jun 28 00:45:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[ 2868.631167] FS-Cache: Loaded 
[ 2868.712349] FS-Cache: Netfs 'nfs' registered for caching 
[ 2869.091058] NFS: Registering the id_resolver key type 
[ 2869.096128] Key type id_resolver registered 
[ 2869.100331] Key type id_legacy registered 
[ 2869.137132] NFS: Server rhel5-nfs.rhts.eng.bos.redhat.com reports our clientid is in use 
[ 2869.145217] NFS: state manager: lease expired failed on NFSv4 server rhel5-nfs.rhts.eng.bos.redhat.com with error 1 
[ 2875.989045] systemd-sysv-generator[105153]: SysV service '/etc/rc.d/init.d/anamon' lacks a native systemd unit file. Automatically generating a unit file for compatibility. Please update package to include a native systemd unit file, in order to make it more safe and robust. 
[ 2897.032131] restraintd[1295]: *** Current Time: Mon Jun 28 00:46:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[ 2928.380016] NFS: Server rhel5-nfs.rhts.eng.bos.redhat.com reports our clientid is in use 
[ 2928.388129] NFS: state manager: lease expired failed on NFSv4 server rhel5-nfs.rhts.eng.bos.redhat.com with error 1 
[ 2957.023341] restraintd[1295]: *** Current Time: Mon Jun 28 00:47:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[ 2958.964592] NFS: Server rhel5-nfs.rhts.eng.bos.redhat.com reports our clientid is in use 
[ 2958.972701] NFS: state manager: lease expired failed on NFSv4 server rhel5-nfs.rhts.eng.bos.redhat.com with error 1 
[ 3017.031345] restraintd[1295]: *** Current Time: Mon Jun 28 00:48:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[ 3077.032030] restraintd[1295]: *** Current Time: Mon Jun 28 00:49:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[-- MARK -- Mon Jun 28 04:50:00 2021] 
[ 3137.031627] restraintd[1295]: *** Current Time: Mon Jun 28 00:50:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[ 3197.039311] restraintd[1295]: *** Current Time: Mon Jun 28 00:51:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[ 3257.038970] restraintd[1295]: *** Current Time: Mon Jun 28 00:52:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[ 3317.038353] restraintd[1295]: *** Current Time: Mon Jun 28 00:53:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[ 3377.021116] restraintd[1295]: *** Current Time: Mon Jun 28 00:54:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[-- MARK -- Mon Jun 28 04:55:00 2021] 
[ 3437.029087] restraintd[1295]: *** Current Time: Mon Jun 28 00:55:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[ 3497.028485] restraintd[1295]: *** Current Time: Mon Jun 28 00:56:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[ 3557.036514] restraintd[1295]: *** Current Time: Mon Jun 28 00:57:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[ 3617.029095] restraintd[1295]: *** Current Time: Mon Jun 28 00:58:12 2021  Localwatchdog at: Mon Jun 28 04:44:12 2021 
[ 3628.182248] Unable to handle kernel paging request at virtual address 5a9cda118662f8fe 
[ 3628.190185] Mem abort info: 
[ 3628.193078]   ESR = 0x96000004 
[ 3628.196268]   EC = 0x25: DABT (current EL), IL = 32 bits 
[ 3628.201654]   SET = 0, FnV = 0 
[ 3628.204712]   EA = 0, S1PTW = 0 
[ 3628.207843] Data abort info: 
[ 3628.210712]   ISV = 0, ISS = 0x00000004 
[ 3628.214542]   CM = 0, WnR = 0 
[ 3628.217498] [5a9cda118662f8fe] address between user and kernel address ranges 
[ 3628.224628] Internal error: Oops: 96000004 [#1] SMP 
[ 3628.229496] Modules linked in: nfsv3 nfs_acl ib_core rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace fscache netfs md4 cifs libdes libarc4 dns_resolver nls_koi8_u nls_cp932 ts_kmp nls_utf8 rfkill sunrpc vfat fat ast drm_vram_helper drm_ttm_helper ttm i2c_algo_bit drm_kms_helper cec fb_sys_fops syscopyarea cavium_rng_vf sysfillrect ipmi_ssif ipmi_devintf sysimgblt ipmi_msghandler cavium_rng thunderx_edac drm fuse xfs libcrc32c nicvf nicpf crct10dif_ce ghash_ce sha2_ce sha256_arm64 sha1_ce thunder_bgx i2c_thunderx thunder_xcv mdio_thunder mdio_cavium dm_mirror dm_region_hash dm_log dm_mod aes_neon_bs [last unloaded: zram] 
[ 3628.284708] CPU: 10 PID: 122817 Comm: runtest.sh Tainted: G               X --------- ---  5.13.0-0.rc7.51.el9.aarch64 #1 
[ 3628.295653] Hardware name: GIGABYTE R120-T34-00/MT30-GS2-00, BIOS F02 08/06/2019 
[ 3628.303037] pstate: 20000005 (nzCv daif -PAN -UAO -TCO BTYPE=--) 
[ 3628.309034] pc : kmem_cache_alloc+0xd0/0x2e0 
[ 3628.313304] lr : kmem_cache_alloc+0xa0/0x2e0 
[ 3628.317565] sp : ffff800016acfb50 
[ 3628.320869] x29: ffff800016acfb50 x28: 0000000001200000 x27: 00000000000006c7 
[ 3628.328000] x26: ffff00011a1902c0 x25: ffff800011fb0000 x24: ffff8000101c7ca0 
[ 3628.335130] x23: ffff000100015a00 x22: 0000000000000dc0 x21: 0000000000000000 
[ 3628.342261] x20: ffff8000117144b0 x19: ffff000100015a00 x18: 0000000000000000 
[ 3628.349391] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 
[ 3628.356522] x14: ffff00014d004d80 x13: 0000000000000000 x12: 0000000000000000 
[ 3628.363652] x11: 0000000000000000 x10: ffff00011b258a00 x9 : ffff8000103486f4 
[ 3628.370782] x8 : ffff000158e73480 x7 : 0000000000000000 x6 : 0000000000000020 
[ 3628.377912] x5 : 0000000000000000 x4 : ffff000ff8f944b0 x3 : 9f231e39f54f625d 
[ 3628.385043] x2 : 0000000000000028 x1 : fef8628611da9c5a x0 : 5a9cda118662f8d6 
[ 3628.392174] Call trace: 
[ 3628.394610]  kmem_cache_alloc+0xd0/0x2e0 
[ 3628.398524]  __delayacct_tsk_init+0x30/0x50 
[ 3628.402699]  copy_process+0xc50/0x1094 
[ 3628.406439]  kernel_clone+0x98/0x474 
[ 3628.410004]  __do_sys_clone+0x70/0xac 
[ 3628.413657]  __arm64_sys_clone+0x2c/0x40 
[ 3628.417570]  invoke_syscall.constprop.0+0x58/0xf0 
[ 3628.422268]  el0_svc_common.constprop.0+0x5c/0x164 
[ 3628.427051]  do_el0_svc+0x34/0xcc 
[ 3628.430357]  el0_svc+0x2c/0x90 
[ 3628.433403]  el0_sync_handler+0xa4/0x150 
[ 3628.437316]  el0_sync+0x198/0x1c0 
[ 3628.440625] Code: b9402a62 f9405e63 8b020001 dac00c21 (f862681a)  
[ 3628.446730] ---[ end trace 10e0701d5830169d ]--- 
[ 3628.451337] Kernel panic - not syncing: Oops: Fatal exception 
[ 3628.457085] SMP: stopping secondary CPUs 
[ 3628.461006] Kernel Offset: disabled 
[ 3628.464482] CPU features: 0x00180251,20800a40 
[ 3628.468829] Memory Limit: none 
[ 3628.471886] ---[ end Kernel panic - not syncing: Oops: Fatal exception ]--- 
---%<-snip->%---

Best,
pbunyan
Comment 2 PaulB 2021-07-01 23:40:18 UTC 
steved,
Please have a look at this issue seen while running nfs/connectathon testing.

Best,
pbunyan
Comment 3 PaulB 2021-07-17 00:05:33 UTC 
All,
Here is a reproducer:
host: qualcomm-amberwing-rep-17
distro: RHEL-9.0.0-20210714.2
kernel: 5.13.0-1.el9
task: kernel/distribution/ltp/lite 20210524-1

https://beaker.engineering.redhat.com/recipes/10308318#task128920979
https://beaker-archive.host.prod.eng.bos.redhat.com/beaker-logs/2021/07/55814/5581485/10308318/console.log
---%<-snip->%---
[ 5302.317146] restraintd[1535]: ** Installing dependencies 
[ 5413.001814] restraintd[1535]: ** Running task: 128920979 [/kernel/distribution/ltp/lite] 
[ 5473.044833] restraintd[1535]: *** Current Time: Thu Jul 15 21:18:37 2021  Localwatchdog at: Fri Jul 16 00:17:36 2021 
[ 5533.027740] restraintd[1535]: *** Current Time: Thu Jul 15 21:19:36 2021  Localwatchdog at: Fri Jul 16 00:17:36 2021 
[-- MARK -- Fri Jul 16 01:20:00 2021] 
[ 5593.042218] restraintd[1535]: *** Current Time: Thu Jul 15 21:20:37 2021  Localwatchdog at: Fri Jul 16 00:17:36 2021 
[ 5638.140444] Unable to handle kernel paging request at virtual address b2c34797740ca191 
[ 5638.147427] Mem abort info: 
[ 5638.150184]   ESR = 0x96000004 
[ 5638.153249]   EC = 0x25: DABT (current EL), IL = 32 bits 
[ 5638.158524]   SET = 0, FnV = 0 
[ 5638.161555]   EA = 0, S1PTW = 0 
[ 5638.164699] Data abort info: 
[ 5638.167545]   ISV = 0, ISS = 0x00000004 
[ 5638.171365]   CM = 0, WnR = 0 
[ 5638.174325] [b2c34797740ca191] address between user and kernel address ranges 
[ 5638.181454] Internal error: Oops: 96000004 [#1] SMP 
[ 5638.186314] Modules linked in: sctp ip6_udp_tunnel udp_tunnel mlx4_en mlx4_core nf_tables nfnetlink ext4 mbcache jbd2 nfs_layout_nfsv41_files nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace fscache netfs md4 cifs libdes libarc4 dns_resolver nls_koi8_u nls_cp932 ts_kmp nls_utf8 rfkill sunrpc vfat fat mlx5_ib ib_uverbs ib_core acpi_ipmi ipmi_ssif ipmi_devintf ipmi_msghandler cppc_cpufreq fuse xfs libcrc32c crct10dif_ce mlx5_core ghash_ce sha2_ce sha256_arm64 sha1_ce sbsa_gwdt mlxfw psample sdhci_acpi tls ahci_platform sdhci libahci_platform mmc_core qcom_emac hdma hdma_mgmt dm_mirror dm_region_hash dm_log dm_mod aes_neon_bs [last unloaded: stap_cce5ee1d3f9699422cb35c3ced2b7d_161026] 
[ 5638.247940] CPU: 26 PID: 206538 Comm: make Tainted: G           OE  X --------- ---  5.13.0-1.el9.aarch64 #1 
[ 5638.257742] Hardware name: WIWYNN Qualcomm Centriq 2400 Reference Evaluation Platform CV90-LA115-P11/Qualcomm Centriq 2400 Customer Reference Board, BIOS  
[ 5638.271557] pstate: a0400005 (NzCv daif +PAN -UAO -TCO BTYPE=--) 
[ 5638.277528] pc : kmem_cache_alloc+0xd0/0x2e0 
[ 5638.281781] lr : kmem_cache_alloc+0xa0/0x2e0 
[ 5638.286035] sp : ffff80003748fc10 
[ 5638.289339] x29: ffff80003748fc10 x28: ffff3fda71962280 x27: 000000000007e952 
[ 5638.296451] x26: 0000000000000000 x25: ffffb31b59e90000 x24: ffffb31b58371028 
[ 5638.303576] x23: ffff3fda00014000 x22: 0000000000000dc0 x21: ffff3fda468cec00 
[ 5638.310687] x20: ffffb31b595f3670 x19: ffff3fda00014000 x18: 0000000000000000 
[ 5638.317806] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 
[ 5638.324923] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 
[ 5638.332042] x11: 0101010101010101 x10: 7f7f7f7f7f7f7f7f x9 : ffffb31b582260d8 
[ 5638.339160] x8 : ffff3fda468cece8 x7 : 0000000000000000 x6 : 0000000000000020 
[ 5638.346278] x5 : 0000000000000030 x4 : ffff3ff0f8783670 x3 : 4afc49b5c25a382a 
[ 5638.353396] x2 : 0000000000000008 x1 : 91a10c749747c3b2 x0 : b2c34797740ca189 
[ 5638.360527] Call trace: 
[ 5638.362963]  kmem_cache_alloc+0xd0/0x2e0 
[ 5638.366851]  security_file_alloc+0x38/0xa4 
[ 5638.370931]  __alloc_file+0x60/0xf0 
[ 5638.374403]  alloc_empty_file+0x6c/0x10c 
[ 5638.378309]  alloc_file+0x38/0x144 
[ 5638.381694]  alloc_file_clone+0x28/0x60 
[ 5638.385514]  create_pipe_files+0x108/0x1dc 
[ 5638.389594]  do_pipe2+0x4c/0x164 
[ 5638.392806]  __arm64_sys_pipe2+0x28/0x3c 
[ 5638.396712]  invoke_syscall.constprop.0+0x58/0xf0 
[ 5638.401399]  el0_svc_common.constprop.0+0x160/0x164 
[ 5638.406260]  do_el0_svc+0x34/0xcc 
[ 5638.409559]  el0_svc+0x2c/0x90 
[ 5638.412597]  el0_sync_handler+0xa4/0x150 
[ 5638.416503]  el0_sync+0x198/0x1c0 
[ 5638.419817] Code: b9402a62 f9405e63 8b020001 dac00c21 (f862681a)  
[ 5638.425913] ---[ end trace 2b8bc703f0fc168c ]--- 
[ 5638.430498] Kernel panic - not syncing: Oops: Fatal exception 
[ 5638.436224] SMP: stopping secondary CPUs 
[ 5638.440166] Kernel Offset: 0x331b47ee0000 from 0xffff800010000000 
[ 5638.446191] PHYS_OFFSET: 0xfff0c02700000000 
[ 5638.450364] CPU features: 0x00000251,21000840 
[ 5638.454698] Memory Limit: none 
[ 5638.457771] ---[ end Kernel panic - not syncing: Oops: Fatal exception ]--- 
[-- MARK -- Fri Jul 16 01:25:00 2021] 
---%<-snip->%---
Comment 4 PaulB 2021-07-17 00:08:13 UTC 
smeisner,
Can you help with proper assignment of this BZ?

Best,
pbunyan
Comment 6 Chris von Recklinghausen 2021-07-19 17:35:47 UTC 
Hi Paul,

Could you boot the kernel with slub_debug=FPZU added to the kernel boot line and try to reproduce the problem?

This should hopefully capture use-after-free and out-of-bounds writes, as well as adding tracking info (stack backtraces of allocs and frees).

If you could capture a crashdump with slub_debug set I could take a look.

Thanks,

Chris
Comment 7 Rafael Aquini 2021-07-19 21:24:16 UTC 
(In reply to Chris von Recklinghausen from comment #6)
> Hi Paul,
> 
> Could you boot the kernel with slub_debug=FPZU added to the kernel boot line
> and try to reproduce the problem?
> 
> This should hopefully capture use-after-free and out-of-bounds writes, as
> well as adding tracking info (stack backtraces of allocs and frees).
> 

Agreed,

This one smells like an use-after-free. slub_debug should help on proving
or refuting that guess.

-- Rafael
Comment 9 PaulB 2022-02-11 22:09:14 UTC 
All,
I was not able to reproduce this issue using recent distro and kernel:
distro: RHEL-9.0.0-20220128.1
kernel: 5.14.0-48.el9 

https://beaker.engineering.redhat.com/jobs/6277892
https://beaker.engineering.redhat.com/jobs/6277891
https://beaker.engineering.redhat.com/jobs/6277887

The failures seen in those jobs are other known issues unrelated to this BZ1977916.

I will close this BZ and reopen if issue resurfaces.


Best,
pbunyan
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