program:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./config\x00', 0x1ff) (async, rerun: 32)
mount(0x0, &(0x7f0000000000)='./config\x00', &(0x7f0000000040)='configfs\x00', 0x0, 0x0) (async, rerun: 32)
mkdirat(0xffffffffffffff9c, &(0x7f00000000c0)='./config/dlm\x00', 0x1ff) (async, rerun: 32)
mkdirat(0xffffffffffffff9c, &(0x7f00000000c0)='./config/dlm/cluster1\x00', 0x1ff) (async, rerun: 32)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./config/dlm/cluster1/comms/1\x00', 0x1ff)
r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000100)='/proc/slabinfo\x00', 0x0, 0x0)
r1 = openat(r0, &(0x7f0000000180)='./config/dlm\x00', 0x202241, 0x134)
write(r1, &(0x7f0000000200)='0200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000', 0x80)
mkdirat(0xffffffffffffff9c, &(0x7f0000000300)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./debug\x00', &(0x7f0000000340)='debugfs\x00', 0x0, 0x0)
r2 = openat(0xffffffffffffff9c, &(0x7f0000000380)='./debug/dlm/comms/1/rawmsg\x00', 0x1, 0x0) (async)
r3 = socket(0x10, 0x3, 0x0) (async, rerun: 64)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000240), 0x0, 0x0) (rerun: 64)
ioctl$TUNSETIFF(r4, 0x400454ca, &(0x7f0000000040)={'syzkaller0\x00', 0x7101}) (async)
sendmsg$nl_route(0xffffffffffffffff, &(0x7f0000000000)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000080)=ANY=[@ANYBLOB="4c0000001000010400"/20, @ANYRES32=0x0, @ANYBLOB="21000000000000002c00128009000100626f6e64000000001c00028005002100010400080500010004"], 0x4c}}, 0x0) (async)
sendmmsg(r3, &(0x7f0000000000), 0x4000000000001f2, 0xfff0) (async)
r5 = socket(0x10, 0x3, 0x0)
write(r5, &(0x7f0000000000)="2400000011005f0414f9f4070009040081000000490000000000000008000f0001000000", 0x24) (async)
write(r2, &(0x7f0000000400)='\x00'/16, 0x10) (async)
syncfs(0xffffffffffffffff)
rmdir(&(0x7f0000000140)='./config/dlm/cluster1/comms/1\x00') (async)
syz_mount_image$vfat(&(0x7f0000000080), &(0x7f0000000040)='./file0\x00', 0x804, &(0x7f00000002c0)={[{@shortname_win95}, {@shortname_lower}, {@utf8}, {@utf8no}, {}, {@rodir}, {@fat=@check_strict}, {@shortname_win95}, {@fat=@fmask={'fmask', 0x3d, 0x5}}, {@fat=@codepage={'codepage', 0x3d, '855'}}, {@numtail}, {@iocharset={'iocharset', 0x3d, 'koi8-ru'}}, {@shortname_win95}, {@shortname_winnt}, {@fat=@tz_utc}]}, 0x1, 0x276, &(0x7f0000000a40)="$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")
[ 95.968130][ T5276] Bluetooth: hci0: command tx timeout
[ 96.171336][ T5315] netlink: 4 bytes leftover after parsing attributes in process `syz.0.0'.
[ 96.195819][ T5311] dlm: closing connection to node 1
[ 96.196358][ T5311] ------------[ cut here ]------------
[ 96.196365][ T5311] !con
[ 96.196370][ T5311] WARNING: fs/dlm/lowcomms.c:1455 at dlm_lowcomms_close+0x12d/0x440, CPU#0: syz.0.0/5311
[ 96.213376][ T5311] Modules linked in:
[ 96.216075][ T5311] CPU: 0 UID: 0 PID: 5311 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 96.221052][ T5311] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 96.227516][ T5311] RIP: 0010:dlm_lowcomms_close+0x12d/0x440
[ 96.231642][ T5311] Code: e9 6f 9f 00 eb a6 44 89 e1 80 e1 07 80 c1 03 38 c1 7c ac 4c 89 e7 e8 62 12 11 01 eb a2 e8 cb 6f 9f 00 eb 05 e8 c4 6f 9f 00 90 <0f> 0b 90 44 89 f7 e8 68 77 5a 01 b8 fe ff ff ff 48 83 c4 20 5b 41
[ 96.240514][ T5311] RSP: 0018:ffffc9000edd7c40 EFLAGS: 00010293
[ 96.243189][ T5311] RAX: ffffffff81287d45 RBX: 0000000000000001 RCX: ffff8880348a8000
[ 96.246520][ T5311] RDX: 0000000000000000 RSI: ffffffff8e6a32d9 RDI: ffffffff8c6dcc80
[ 96.249833][ T5311] RBP: dffffc0000000000 R08: 0000000000000004 R09: ffffffff96bb6438
[ 96.253059][ T5311] R10: 000000005d29055c R11: 00000000be75b10f R12: 0000000000000000
[ 96.256519][ T5311] R13: ffffffff81287c78 R14: 0000000000000000 R15: 0000000000000000
[ 96.260316][ T5311] FS: 00007fe5afa5c6c0(0000) GS:ffff88808c2bf000(0000) knlGS:0000000000000000
[ 96.264486][ T5311] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 96.267466][ T5311] CR2: 00007fe5af995fe8 CR3: 000000003730c000 CR4: 0000000000352ef0
[ 96.270737][ T5311] Call Trace:
[ 96.272264][ T5311]
[ 96.273580][ T5311] ? dlm_midcomms_close+0x3a9/0x4c0
[ 96.275878][ T5311] ? dlm_midcomms_close+0x4b/0x4c0
[ 96.278079][ T5311] drop_comm+0x61/0x190
[ 96.280072][ T5311] ? configfs_rmdir+0x850/0x950
[ 96.282186][ T5311] ? __pfx_drop_comm+0x10/0x10
[ 96.284195][ T5311] configfs_rmdir+0x85f/0x950
[ 96.286214][ T5311] vfs_rmdir+0x3e6/0x6a0
[ 96.288189][ T5311] ? bpf_lsm_path_rmdir+0x9/0x20
[ 96.290649][ T5311] filename_rmdir+0x292/0x520
[ 96.292678][ T5311] ? __pfx_filename_rmdir+0x10/0x10
[ 96.295221][ T5311] ? do_getname+0x151/0x250
[ 96.297239][ T5311] __se_sys_rmdir+0x2e/0x140
[ 96.299257][ T5311] do_syscall_64+0x166/0x520
[ 96.304025][ T5311] ? trace_irq_disable+0x3b/0x140
[ 96.306378][ T5311] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 96.309613][ T5311] ? clear_bhb_loop+0x70/0xc0
[ 96.312354][ T5311] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 96.315672][ T5311] RIP: 0033:0x7fe5aeb9e159
[ 96.318276][ T5311] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[ 96.328538][ T5311] RSP: 002b:00007fe5afa5bfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
[ 96.332734][ T5311] RAX: ffffffffffffffda RBX: 00007fe5aee25fa0 RCX: 00007fe5aeb9e159
[ 96.336582][ T5311] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000140
[ 96.339887][ T5311] RBP: 00007fe5aec3506b R08: 0000000000000000 R09: 0000000000000000
[ 96.342733][ T5311] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 96.346004][ T5311] R13: 00007fe5aee26038 R14: 00007fe5aee25fa0 R15: 00007ffd7a68d3c8
[ 96.349502][ T5311]
[ 96.350795][ T5311] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 96.353979][ T5311] CPU: 0 UID: 0 PID: 5311 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 96.358018][ T5311] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 96.362336][ T5311] Call Trace:
[ 96.363917][ T5311]
[ 96.365403][ T5311] vpanic+0x56d/0xa60
[ 96.367249][ T5311] ? __pfx__printk+0x10/0x10
[ 96.369243][ T5311] ? __pfx_vpanic+0x10/0x10
[ 96.371286][ T5311] ? is_bpf_text_address+0x292/0x2b0
[ 96.373541][ T5311] ? is_bpf_text_address+0x26/0x2b0
[ 96.375742][ T5311] panic+0xc5/0xd0
[ 96.377342][ T5311] ? __pfx_panic+0x10/0x10
[ 96.379269][ T5311] __warn+0x315/0x4c0
[ 96.381003][ T5311] ? dlm_lowcomms_close+0x12d/0x440
[ 96.383358][ T5311] ? dlm_lowcomms_close+0x12d/0x440
[ 96.385743][ T5311] __report_bug+0x276/0x570
[ 96.387893][ T5311] ? check_path+0x21/0x40
[ 96.389821][ T5311] ? dlm_lowcomms_close+0x12d/0x440
[ 96.392159][ T5311] ? __pfx___report_bug+0x10/0x10
[ 96.394350][ T5311] ? lockdep_unlock+0x5c/0xd0
[ 96.396172][ T5311] ? __lock_acquire+0x1511/0x2de0
[ 96.398162][ T5311] ? dlm_lowcomms_close+0x12d/0x440
[ 96.400498][ T5311] report_bug+0x16b/0x220
[ 96.402457][ T5311] ? dlm_lowcomms_close+0x12d/0x440
[ 96.404732][ T5311] ? dlm_lowcomms_close+0x12f/0x440
[ 96.407020][ T5311] handle_bug+0x9c/0x200
[ 96.408919][ T5311] exc_invalid_op+0x1a/0x50
[ 96.411026][ T5311] asm_exc_invalid_op+0x1a/0x20
[ 96.412993][ T5311] RIP: 0010:dlm_lowcomms_close+0x12d/0x440
[ 96.415709][ T5311] Code: e9 6f 9f 00 eb a6 44 89 e1 80 e1 07 80 c1 03 38 c1 7c ac 4c 89 e7 e8 62 12 11 01 eb a2 e8 cb 6f 9f 00 eb 05 e8 c4 6f 9f 00 90 <0f> 0b 90 44 89 f7 e8 68 77 5a 01 b8 fe ff ff ff 48 83 c4 20 5b 41
[ 96.423973][ T5311] RSP: 0018:ffffc9000edd7c40 EFLAGS: 00010293
[ 96.426350][ T5311] RAX: ffffffff81287d45 RBX: 0000000000000001 RCX: ffff8880348a8000
[ 96.429162][ T5311] RDX: 0000000000000000 RSI: ffffffff8e6a32d9 RDI: ffffffff8c6dcc80
[ 96.432006][ T5311] RBP: dffffc0000000000 R08: 0000000000000004 R09: ffffffff96bb6438
[ 96.434880][ T5311] R10: 000000005d29055c R11: 00000000be75b10f R12: 0000000000000000
[ 96.437954][ T5311] R13: ffffffff81287c78 R14: 0000000000000000 R15: 0000000000000000
[ 96.440991][ T5311] ? dlm_lowcomms_close+0x58/0x440
[ 96.443136][ T5311] ? dlm_lowcomms_close+0x125/0x440
[ 96.445436][ T5311] ? dlm_midcomms_close+0x3a9/0x4c0
[ 96.447426][ T5311] ? dlm_midcomms_close+0x4b/0x4c0
[ 96.449417][ T5311] drop_comm+0x61/0x190
[ 96.451226][ T5311] ? configfs_rmdir+0x850/0x950
[ 96.453376][ T5311] ? __pfx_drop_comm+0x10/0x10
[ 96.455552][ T5311] configfs_rmdir+0x85f/0x950
[ 96.457517][ T5311] vfs_rmdir+0x3e6/0x6a0
[ 96.459125][ T5311] ? bpf_lsm_path_rmdir+0x9/0x20
[ 96.461099][ T5311] filename_rmdir+0x292/0x520
[ 96.463050][ T5311] ? __pfx_filename_rmdir+0x10/0x10
[ 96.465141][ T5311] ? do_getname+0x151/0x250
[ 96.467022][ T5311] __se_sys_rmdir+0x2e/0x140
[ 96.468742][ T5311] do_syscall_64+0x166/0x520
[ 96.470556][ T5311] ? trace_irq_disable+0x3b/0x140
[ 96.472670][ T5311] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 96.475300][ T5311] ? clear_bhb_loop+0x70/0xc0
[ 96.477238][ T5311] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 96.479764][ T5311] RIP: 0033:0x7fe5aeb9e159
[ 96.481510][ T5311] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[ 96.489292][ T5311] RSP: 002b:00007fe5afa5bfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
[ 96.492776][ T5311] RAX: ffffffffffffffda RBX: 00007fe5aee25fa0 RCX: 00007fe5aeb9e159
[ 96.496175][ T5311] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000140
[ 96.499582][ T5311] RBP: 00007fe5aec3506b R08: 0000000000000000 R09: 0000000000000000
[ 96.503116][ T5311] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 96.506626][ T5311] R13: 00007fe5aee26038 R14: 00007fe5aee25fa0 R15: 00007ffd7a68d3c8
[ 96.510075][ T5311]
[ 96.511903][ T5311] Kernel Offset: disabled
[ 96.514142][ T5311] Rebooting in 86400 seconds..