I hit this ksmbd oops with current for-next (for client) running against current mainline (server) today 2023-12-15T23:58:15.975267-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832908] BUG: kernel NULL pointer dereference, address: 0000000000000000 2023-12-15T23:58:15.975292-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832914] #PF: supervisor read access in kernel mode 2023-12-15T23:58:15.975293-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832917] #PF: error_code(0x0000) - not-present page 2023-12-15T23:58:15.975294-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832920] PGD 0 P4D 0 2023-12-15T23:58:15.975294-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832923] Oops: 0000 [#1] PREEMPT SMP PTI 2023-12-15T23:58:15.975295-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832927] CPU: 3 PID: 7410 Comm: kworker/3:2 Tainted: G OE 6.7.0-060700rc5-generic #202312102332 2023-12-15T23:58:15.975314-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832931] Hardware name: LENOVO 20MAS08500/20MAS08500, BIOS N2CET67W (1.50 ) 12/15/2022 2023-12-15T23:58:15.975315-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832933] Workqueue: ksmbd-io handle_ksmbd_work [ksmbd] 2023-12-15T23:58:15.975315-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832958] RIP: 0010:lib_sha256_base_do_update.isra.0+0x11e/0x1d0 [sha256_ssse3] 2023-12-15T23:58:15.975316-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832966] Code: 0f 1f 00 45 85 f6 0f 84 5d ff ff ff 41 c1 e4 06 4d 63 e4 4d 01 e5 eb 09 45 85 f6 0f 84 48 ff ff ff 48 83 c3 28 e9 31 ff ff ff <49> 8b 7d 00 4d 89 ea 48 89 3e 4b 8b 7c 0d f8 4a 89 7c 0e f8 48 8d 2023-12-15T23:58:15.975316-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832969] RSP: 0018:ffffc9000b9dbb78 EFLAGS: 00010202 2023-12-15T23:58:15.975317-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832973] RAX: 000000000000002b RBX: ffff888105f89a10 RCX: ffffffffc1c5ea00 2023-12-15T23:58:15.975317-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832975] RDX: 0000000000000015 RSI: ffff888105f89a4d RDI: ffff888105f89a10 2023-12-15T23:58:15.975318-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832977] RBP: ffffc9000b9dbba0 R08: ffff888105f89a38 R09: 000000000000002b 2023-12-15T23:58:15.975318-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832979] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000040 2023-12-15T23:58:15.975319-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832981] R13: 0000000000000000 R14: 0000000000000040 R15: 0000000000000020 2023-12-15T23:58:15.975319-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832983] FS: 0000000000000000(0000) GS:ffff88887b980000(0000) knlGS:0000000000000000 2023-12-15T23:58:15.975319-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832986] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 2023-12-15T23:58:15.975320-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832989] CR2: 0000000000000000 CR3: 000000058063c006 CR4: 00000000003706f0 2023-12-15T23:58:15.975320-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832991] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 2023-12-15T23:58:15.975320-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832993] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 2023-12-15T23:58:15.975321-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832995] Call Trace: 2023-12-15T23:58:15.975321-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.832997] <TASK> 2023-12-15T23:58:15.975321-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833000] ? show_regs+0x6d/0x80 2023-12-15T23:58:15.975322-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833005] ? __die+0x24/0x80 2023-12-15T23:58:15.975322-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833008] ? page_fault_oops+0x99/0x1b0 2023-12-15T23:58:15.975322-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833013] ? do_user_addr_fault+0x2f7/0x6a0 2023-12-15T23:58:15.975323-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833017] ? exc_page_fault+0x83/0x1b0 2023-12-15T23:58:15.975323-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833022] ? asm_exc_page_fault+0x27/0x30 2023-12-15T23:58:15.975323-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833027] ? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3] 2023-12-15T23:58:15.975323-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833035] ? lib_sha256_base_do_update.isra.0+0x11e/0x1d0 [sha256_ssse3] 2023-12-15T23:58:15.975324-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833041] ? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3] 2023-12-15T23:58:15.975324-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833048] ? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3] 2023-12-15T23:58:15.975324-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833054] _sha256_update+0x77/0xa0 [sha256_ssse3] 2023-12-15T23:58:15.975325-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833061] sha256_avx2_update+0x15/0x30 [sha256_ssse3] 2023-12-15T23:58:15.975325-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833067] crypto_shash_update+0x1e/0x60 2023-12-15T23:58:15.975325-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833072] hmac_update+0x12/0x20 2023-12-15T23:58:15.975326-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833076] crypto_shash_update+0x1e/0x60 2023-12-15T23:58:15.975326-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833079] generate_key+0x234/0x380 [ksmbd] 2023-12-15T23:58:15.975326-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833096] generate_smb3encryptionkey+0x40/0x1c0 [ksmbd] 2023-12-15T23:58:15.975335-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833111] ksmbd_gen_smb311_encryptionkey+0x72/0xa0 [ksmbd] 2023-12-15T23:58:15.975335-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833127] smb2_sess_setup+0xd30/0x1510 [ksmbd] 2023-12-15T23:58:15.975335-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833145] ? kvmalloc_node+0x24/0x100 2023-12-15T23:58:15.975336-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833150] handle_ksmbd_work+0x16b/0x4d0 [ksmbd] 2023-12-15T23:58:15.975336-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833168] process_one_work+0x16c/0x350 2023-12-15T23:58:15.975336-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833173] worker_thread+0x306/0x440 2023-12-15T23:58:15.975336-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833177] ? _raw_spin_lock_irqsave+0xe/0x20 2023-12-15T23:58:15.975337-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833182] ? __pfx_worker_thread+0x10/0x10 2023-12-15T23:58:15.975337-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833185] kthread+0xef/0x120 2023-12-15T23:58:15.975338-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833190] ? __pfx_kthread+0x10/0x10 2023-12-15T23:58:15.975338-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833194] ret_from_fork+0x44/0x70 2023-12-15T23:58:15.975338-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833197] ? __pfx_kthread+0x10/0x10 2023-12-15T23:58:15.975339-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833201] ret_from_fork_asm+0x1b/0x30 2023-12-15T23:58:15.975339-06:00 smfrench-ThinkPad-P52 kernel: [ 1058.833207] </TASK> -- Thanks, Steve
