Test the latest kernel in the branch for-next of git://git.samba.org/sfrench/cifs-2.6.git. Kernel always panic when mount cifs with option "-o sec=krb5,multiuser". Bug 216878 - CIFS: kernel BUG at mm/slub.c:435 https://bugzilla.kernel.org/show_bug.cgi?id=216878 [332881.480892] kernel BUG at mm/slub.c:435! [332881.481816] invalid opcode: 0000 [#1] PREEMPT SMP PTI [332881.482958] CPU: 0 PID: 144956 Comm: mount.cifs Kdump: loaded Not tainted 6.2.0-rc1 #1 [332881.484714] Hardware name: Red Hat KVM, BIOS 1.15.0-1.el9 04/01/2014 [332881.486121] RIP: 0010:__kmem_cache_free+0x2bb/0x2e0 [332881.487231] Code: 5e e9 19 e8 ff ff 49 8b 46 08 f0 48 83 28 01 0f 85 96 fe ff ff 49 8b 46 08 4c 89 f7 48 8b 40 08 e8 4a 62 8c 00 e9 81 fe ff ff <0f> 0b 4c 8b 32 4d 85 f6 0f 85 1d fe ff ff e9 b2 fe ff ff 48 8b 15 [332881.491300] RSP: 0018:ffffa20cc33b7bb0 EFLAGS: 00010246 [332881.492472] RAX: ffff93dcb0bd0060 RBX: ffff93dcb0bd0060 RCX: ffff93dcb0bd0070 [332881.494049] RDX: 00000000da820000 RSI: ffffebe380000000 RDI: ffff93dc40042400 [332881.495584] RBP: ffff93dc40042400 R08: 0000000000000000 R09: ffff93dcb0bd0060 [332881.497155] R10: ffffa20cc33b7a90 R11: ffffffffad3e4b48 R12: ffffebe385c2f400 [332881.498709] R13: ffffffffc0f3c0a5 R14: ffff93dca323b800 R15: ffff93dca323ba10 [332881.500267] FS: 00007f1798617780(0000) GS:ffff93dd1a600000(0000) knlGS:0000000000000000 [332881.502038] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [332881.503324] CR2: 00007f2c31de1000 CR3: 000000010334e006 CR4: 0000000000370ef0 [332881.504889] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [332881.506463] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [332881.508024] Call Trace: [332881.508608] <TASK> [332881.509118] sesInfoFree+0x85/0x1a0 [cifs] [332881.510347] cifs_get_smb_ses+0x3ce/0x980 [cifs] [332881.511468] cifs_mount_get_session+0x65/0x1e0 [cifs] [332881.512701] dfs_mount_share+0x33/0x140 [cifs] [332881.513840] cifs_mount+0x60/0x2d0 [cifs] [332881.514874] cifs_smb3_do_mount+0xf8/0x310 [cifs] [332881.516059] smb3_get_tree+0x3d/0x70 [cifs] [332881.517127] vfs_get_tree+0x25/0xc0 [332881.518369] do_new_mount+0x17a/0x310 [332881.519612] __x64_sys_mount+0x107/0x140 [332881.520920] do_syscall_64+0x5c/0x90 [332881.522184] ? __do_sys_capset+0x14d/0x220 [332881.523498] ? syscall_exit_work+0x103/0x130 [332881.524832] ? syscall_exit_to_user_mode+0x12/0x30 [332881.526288] ? do_syscall_64+0x69/0x90 [332881.527509] ? exc_page_fault+0x62/0x150 [332881.528752] entry_SYSCALL_64_after_hwframe+0x72/0xdc [332881.530237] RIP: 0033:0x7f179843f7be [332881.531420] Code: 48 8b 0d 65 a6 1b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 32 a6 1b 00 f7 d8 64 89 01 48 [332881.536167] RSP: 002b:00007ffe73666a18 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 [332881.538195] RAX: ffffffffffffffda RBX: 0000555761170eb0 RCX: 00007f179843f7be [332881.540121] RDX: 000055575f65d473 RSI: 000055575f65d4da RDI: 00007ffe7366803b [332881.542054] RBP: 0000000000000000 R08: 0000555761170eb0 R09: 0000000000000000 [332881.543983] R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffe73668030 [332881.545903] R13: 00007f179862b000 R14: 00007f179862d90f R15: 0000555761171ee0
