RHEL9 crash in __submit_bio() with third-party module [snapapi26] loaded.

Issue

• Kernel crash with a null pointer dereference:

PID: 123      TASK: ff243e9a2a9ca2c0  CPU: 1    COMMAND: "md126_raid1"
 #0 [ff6b83f8c0a5fa28] machine_kexec at ffffffffb48695b1
 #1 [ff6b83f8c0a5fa38] __ipmi_set_host_system_status at ffffffffc01d660b [ossn]
 #2 [ff6b83f8c0a5fa58] ipmi_set_host_system_status_panic at ffffffffc01d6691 [ossn]
 #3 [ff6b83f8c0a5fa68] ossn_machine_kexec_handler at ffffffffc01d7a95 [ossn]
 #4 [ff6b83f8c0a5fa80] kprobe_ftrace_handler at ffffffffb486d2bb
 #5 [ff6b83f8c0a5fb28] machine_kexec at ffffffffb486973d
 #6 [ff6b83f8c0a5fb78] __crash_kexec at ffffffffb49be29d
 #7 [ff6b83f8c0a5fc40] crash_kexec at ffffffffb49bf528
 #8 [ff6b83f8c0a5fc48] oops_end at ffffffffb48282ab
 #9 [ff6b83f8c0a5fc68] exc_page_fault at ffffffffb52da502
#10 [ff6b83f8c0a5fc90] asm_exc_page_fault at ffffffffb5400b62
#11 [ff6b83f8c0a5fd48] __submit_bio at ffffffffb4ce81a6
#12 [ff6b83f8c0a5fd68] __submit_bio_noacct at ffffffffb4ce82d1
#13 [ff6b83f8c0a5fdb0] flush_bio_list at ffffffffc01809f8 [raid1]
#14 [ff6b83f8c0a5fdd0] flush_pending_writes at ffffffffc0180b01 [raid1]
#15 [ff6b83f8c0a5fe20] raid1d at ffffffffc01857ec [raid1]
#16 [ff6b83f8c0a5feb0] md_thread at ffffffffb4ffedb8
#17 [ff6b83f8c0a5ff10] kthread at ffffffffb491c456
#18 [ff6b83f8c0a5ff50] ret_from_fork at ffffffffb48036ef

• Another call stack:

[20630222.867995] BUG: kernel NULL pointer dereference, address: 0000000000000000
[20630222.868919] #PF: supervisor instruction fetch in kernel mode
[20630222.868921] #PF: error_code(0x0010) - not-present page
[20630222.868922] PGD 10a86c067 P4D 0 
[20630222.868924] Oops: 0010 [#1] PREEMPT SMP NOPTI
[20630222.869881] CPU: 8 PID: 1406 Comm: systemd-journal Kdump: loaded Tainted: G           OE     -------  ---  5.14.0-362.8.1.el9_3.x86_64 #1
[20630222.870924] session_init(service_process,2712559): OK. kdev=fd:1, bs=4096.
[20630222.871197] Hardware name: Dell Inc. PowerEdge R7615/0G9DHV, BIOS 1.7.2 12/19/2023
[20630222.873789] RIP: 0010:0x0
[20630222.874236] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
[20630222.874663] RSP: 0000:ff595207c13ef9c8 EFLAGS: 00010246
[20630222.875086] RAX: 0000000000000000 RBX: ff44386e24d94c00 RCX: ff44387e9cfe2738
[20630222.875510] RDX: ff4438a3216e4680 RSI: 0000000000000000 RDI: ff44387e9cfe2738
[20630222.875926] RBP: ff44387e9cfe2738 R08: 0000000000000000 R09: ff44386e0de63ed0
[20630222.876338] R10: 0000000000000000 R11: 0000000000000000 R12: ff44386e24d60c00
[20630222.876744] R13: ffffffffc0b2a170 R14: 0000000000003000 R15: ff595207c13efc20
[20630222.877148] FS:  00007fd91656c580(0000) GS:ff4438ac7cc00000(0000) knlGS:0000000000000000
[20630222.877553] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[20630222.877952] CR2: ffffffffffffffd6 CR3: 000000362294c005 CR4: 0000000000771ee0
[20630222.878353] PKRU: 55555554
[20630222.878745] Call Trace:
[20630222.879132]  <TASK>
[20630222.879512]  ? show_trace_log_lvl+0x1c4/0x2df
[20630222.879894]  ? show_trace_log_lvl+0x1c4/0x2df
[20630222.880263]  ? __submit_bio+0x86/0x130
[20630222.880628]  ? __die_body.cold+0x8/0xd
[20630222.880984]  ? page_fault_oops+0x134/0x170
[20630222.881338]  ? ktime_get+0x35/0xa0
[20630222.881688]  ? exc_page_fault+0x62/0x150
[20630222.882031]  ? asm_exc_page_fault+0x22/0x30
[20630222.882370]  __submit_bio+0x86/0x130
[20630222.882701]  __submit_bio_noacct+0x81/0x1f0
[20630222.883025]  iomap_readahead+0x1ef/0x350
[20630222.883348]  read_pages+0x58/0x2f0
[20630222.883662]  page_cache_ra_unbounded+0x10c/0x180
[20630222.883971]  do_sync_mmap_readahead+0x138/0x250
[20630222.884277]  filemap_fault+0x3e3/0x740
[20630222.884577]  __do_fault+0x33/0x140
[20630222.884870]  do_read_fault+0xf0/0x160
[20630222.885158]  do_fault+0xa9/0x390
[20630222.885440]  __handle_mm_fault+0x585/0x650
[20630222.885718]  ? rseq_ip_fixup+0x6e/0x1a0
[20630222.885990]  handle_mm_fault+0xc5/0x2a0
[20630222.885718]  ? rseq_ip_fixup+0x6e/0x1a0
[20630222.885990]  handle_mm_fault+0xc5/0x2a0
[20630222.886254]  do_user_addr_fault+0x1b4/0x6a0
[20630222.886513]  ? syscall_trace_enter.constprop.0+0x9a/0x1a0
[20630222.886771]  exc_page_fault+0x62/0x150
[20630222.887028]  asm_exc_page_fault+0x22/0x30
[20630222.887281] RIP: 0033:0x7fd916438698
[20630222.887536] Code: 35 68 03 0a 00 48 8d 3d 93 ea 07 00 e8 f1 c7 e3 ff 90 55 53 48 83 ec 08 48 85 ff 0f 84 41 01 00 00 48 85 f6 0f 84 58 01 00 00 <48> 8b 5e 08 48 89 cd 48 85 db 74 44 48 83 fb 0f 76 66 0f b6 06 84
[20630222.888073] RSP: 002b:00007ffd35a266a0 EFLAGS: 00010202
[20630222.888342] RAX: 0000000000000001 RBX: 00007ffd35a26740 RCX: 0000000000f56580
[20630222.888607] RDX: 0000000000000001 RSI: 00007fd911756580 RDI: 000056546c88c3c0
[20630222.888862] RBP: 000056546c88c3c0 R08: 0000000000000010 R09: 000056546c88c3f8
[20630222.889108] R10: 000056546c89dc40 R11: 000000004c000000 R12: 0000000000f56580
[20630222.889353] R13: 0000000000000001 R14: 00007ffd35a266c0 R15: 00007ffd35a26740
[20630222.889597]  </TASK>
[20630222.889832] Modules linked in: binfmt_misc snumbd26(OE) nls_utf8 cifs cifs_arc4 rdma_cm iw_cm ib_cm ib_core cifs_md4 rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs snapapi26(OE) bridge 8021q garp mrp stp llc bonding tls rfkill nvidia_drm(OE) nvidia_modeset(OE) sunrpc nvidia_uvm(OE) ipmi_ssif intel_rapl_msr intel_rapl_common amd64_edac edac_mce_amd nvidia(OE) kvm_amd dcdbas kvm irqbypass dell_smbios rapl dell_wmi_descriptor wmi_bmof pcspkr mgag200 i2c_algo_bit vfat drm_shmem_helper video fat ext4 acpi_ipmi drm_kms_helper ipmi_si syscopyarea ipmi_devintf mbcache sysfillrect sysimgblt k10temp i2c_piix4 acpi_power_meter ipmi_msghandler jbd2 joydev drm fuse xfs libcrc32c sd_mod t10_pi sg ahci libahci crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel libata mpi3mr bnxt_en tg3 ccp scsi_transport_sas wmi sp5100_tco dm_mirror dm_region_hash dm_log dm_mod
[20630222.892103] CR2: 0000000000000000