08-Apr-2026 22:02:59: starting attempt #0
08-Apr-2026 22:04:28: attempt failed: "general protection fault in fuse_dev_alloc_install"
08-Apr-2026 22:04:28: starting attempt #1
08-Apr-2026 22:05:58: attempt failed: "general protection fault in fuse_dev_alloc_install"
08-Apr-2026 22:05:58: starting attempt #2
08-Apr-2026 22:07:26: attempt failed: "general protection fault in fuse_dev_alloc_install"
08-Apr-2026 22:07:26: report:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000046: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000230-0x0000000000000237]
CPU: 0 UID: 0 PID: 6012 Comm: syz.2.168 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:fuse_dev_alloc_install+0x39/0x80
Code: e8 bc f8 ff ff 48 89 c3 48 85 c0 74 47 e8 7f 57 7f fe 49 8d be 30 02 00 00 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 6c 94 e9 fe 49 8b 96 30 02 00 00 49 c7 86 30
RSP: 0018:ffffc90006857710 EFLAGS: 00010202
RAX: 0000000000000046 RBX: ffff888166f66700 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8dfcdb14 RDI: 0000000000000230
RBP: ffff888161a91c90 R08: ffffffff9032e7f7 R09: 1ffffffff2065cfe
R10: dffffc0000000000 R11: fffffbfff2065cff R12: ffff888107732840
R13: ffff888107732810 R14: 0000000000000000 R15: ffff888107732800
FS: 0000555569268500(0000) GS:ffff88818dc2f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa41272ba40 CR3: 0000000173864000 CR4: 00000000000006f0
Call Trace:
cuse_channel_open+0x107/0x7c0
misc_open+0x2d5/0x350
chrdev_open+0x4cd/0x5e0
do_dentry_open+0x785/0x14e0
vfs_open+0x3b/0x340
path_openat+0x2e08/0x3860
do_file_open+0x23e/0x4a0
do_sys_openat2+0x113/0x200
__x64_sys_openat+0x138/0x170
do_syscall_64+0x15f/0xf80
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa41279c819
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
RSP: 002b:00007ffe78b24f18 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fa412a15fa0 RCX: 00007fa41279c819
RDX: 0000000000000002 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007fa412832c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa412a15fac R14: 00007fa412a15fa0 R15: 00007fa412a15fa0
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fuse_dev_alloc_install+0x39/0x80
Code: e8 bc f8 ff ff 48 89 c3 48 85 c0 74 47 e8 7f 57 7f fe 49 8d be 30 02 00 00 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 6c 94 e9 fe 49 8b 96 30 02 00 00 49 c7 86 30
RSP: 0018:ffffc90006857710 EFLAGS: 00010202
RAX: 0000000000000046 RBX: ffff888166f66700 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8dfcdb14 RDI: 0000000000000230
RBP: ffff888161a91c90 R08: ffffffff9032e7f7 R09: 1ffffffff2065cfe
R10: dffffc0000000000 R11: fffffbfff2065cff R12: ffff888107732840
R13: ffff888107732810 R14: 0000000000000000 R15: ffff888107732800
FS: 0000555569268500(0000) GS:ffff8882a922f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055dad81327b0 CR3: 0000000173864000 CR4: 00000000000006f0
08-Apr-2026 22:07:26: output:
last executing test programs:
155.480807ms ago: executing program 0 (id=148):
process_madvise(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0, 0x0)
84.614646ms ago: executing program 1 (id=151):
inotify_rm_watch(0xffffffffffffffff, 0x0)
84.344289ms ago: executing program 0 (id=152):
sched_getscheduler(0x0)
84.081321ms ago: executing program 2 (id=153):
openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/video1', 0x2, 0x0)
83.560268ms ago: executing program 1 (id=154):
utimes(&(0x7f0000000000), &(0x7f0000000000))
83.217582ms ago: executing program 1 (id=155):
sendfile(0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0x0)
82.759314ms ago: executing program 2 (id=156):
openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/ocfs2_control', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/ocfs2_control', 0x1, 0x0)
openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/ocfs2_control', 0x2, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/ocfs2_control', 0x800, 0x0)
79.903046ms ago: executing program 0 (id=157):
chown(&(0x7f0000000000), 0x0, 0x0)
77.182425ms ago: executing program 1 (id=158):
setfsgid(0x0)
76.92122ms ago: executing program 2 (id=159):
syz_open_dev$hidraw(&(0x7f0000000040), 0x0, 0x0)
syz_open_dev$hidraw(&(0x7f0000000080), 0x0, 0x1)
syz_open_dev$hidraw(&(0x7f00000000c0), 0x0, 0x2)
syz_open_dev$hidraw(&(0x7f0000000100), 0x0, 0x800)
syz_open_dev$hidraw(&(0x7f0000000140), 0x1, 0x0)
syz_open_dev$hidraw(&(0x7f0000000180), 0x1, 0x1)
syz_open_dev$hidraw(&(0x7f00000001c0), 0x1, 0x2)
syz_open_dev$hidraw(&(0x7f0000000200), 0x1, 0x800)
syz_open_dev$hidraw(&(0x7f0000000240), 0x2, 0x0)
syz_open_dev$hidraw(&(0x7f0000000280), 0x2, 0x1)
syz_open_dev$hidraw(&(0x7f00000002c0), 0x2, 0x2)
syz_open_dev$hidraw(&(0x7f0000000300), 0x2, 0x800)
syz_open_dev$hidraw(&(0x7f0000000340), 0x3, 0x0)
syz_open_dev$hidraw(&(0x7f0000000380), 0x3, 0x1)
syz_open_dev$hidraw(&(0x7f00000003c0), 0x3, 0x2)
syz_open_dev$hidraw(&(0x7f0000000400), 0x3, 0x800)
syz_open_dev$hidraw(&(0x7f0000000440), 0x4, 0x0)
syz_open_dev$hidraw(&(0x7f0000000480), 0x4, 0x1)
syz_open_dev$hidraw(&(0x7f00000004c0), 0x4, 0x2)
syz_open_dev$hidraw(&(0x7f0000000500), 0x4, 0x800)
13.230742ms ago: executing program 0 (id=160):
openat(0xffffffffffffff9c, &(0x7f0000000040)='/proc/sys/fs/binfmt_misc/register', 0x1, 0x0)
13.048979ms ago: executing program 1 (id=161):
openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/virtual_nci', 0x2, 0x0)
12.72198ms ago: executing program 2 (id=162):
readv(0xffffffffffffffff, &(0x7f0000000000), 0x0)
12.133972ms ago: executing program 0 (id=163):
openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/userfaultfd', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/userfaultfd', 0x1, 0x0)
openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/userfaultfd', 0x2, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/userfaultfd', 0x800, 0x0)
11.783512ms ago: executing program 2 (id=164):
openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/kvm', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/kvm', 0x1, 0x0)
openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/kvm', 0x2, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/kvm', 0x800, 0x0)
11.560114ms ago: executing program 2 (id=165):
sched_getparam(0x0, &(0x7f0000000000))
2.442063ms ago: executing program 0 (id=166):
getgid()
0s ago: executing program 1 (id=167):
capget(&(0x7f0000000000), &(0x7f0000000000))
0s ago: executing program 2 (id=168):
openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/cuse', 0x2, 0x0)
kernel console output (not intermixed with test programs):
Warning: Permanently added '[localhost]:28194' (ED25519) to the list of known hosts.
syzkaller login: [ 64.020580][ T5807] cgroup: Unknown subsys name 'net'
[ 64.127766][ T5807] cgroup: Unknown subsys name 'cpuset'
[ 64.134571][ T5807] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[ 66.243956][ T5807] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 73.518956][ T6012] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000046: 0000 [#1] SMP KASAN PTI
[ 73.523184][ T6012] KASAN: null-ptr-deref in range [0x0000000000000230-0x0000000000000237]
[ 73.526227][ T6012] CPU: 0 UID: 0 PID: 6012 Comm: syz.2.168 Not tainted syzkaller #0 PREEMPT(full)
[ 73.529415][ T6012] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 73.532883][ T6012] RIP: 0010:fuse_dev_alloc_install+0x39/0x80
[ 73.535128][ T6012] Code: e8 bc f8 ff ff 48 89 c3 48 85 c0 74 47 e8 7f 57 7f fe 49 8d be 30 02 00 00 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 6c 94 e9 fe 49 8b 96 30 02 00 00 49 c7 86 30
[ 73.542355][ T6012] RSP: 0018:ffffc90006857710 EFLAGS: 00010202
[ 73.544628][ T6012] RAX: 0000000000000046 RBX: ffff888166f66700 RCX: dffffc0000000000
[ 73.547501][ T6012] RDX: 0000000000000000 RSI: ffffffff8dfcdb14 RDI: 0000000000000230
[ 73.550418][ T6012] RBP: ffff888161a91c90 R08: ffffffff9032e7f7 R09: 1ffffffff2065cfe
[ 73.553387][ T6012] R10: dffffc0000000000 R11: fffffbfff2065cff R12: ffff888107732840
[ 73.556364][ T6012] R13: ffff888107732810 R14: 0000000000000000 R15: ffff888107732800
[ 73.559522][ T6012] FS: 0000555569268500(0000) GS:ffff88818dc2f000(0000) knlGS:0000000000000000
[ 73.563164][ T6012] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 73.565630][ T6012] CR2: 00007fa41272ba40 CR3: 0000000173864000 CR4: 00000000000006f0
[ 73.568673][ T6012] Call Trace:
[ 73.569950][ T6012]
[ 73.571081][ T6012] cuse_channel_open+0x107/0x7c0
[ 73.573026][ T6012] ? __pfx_cuse_channel_open+0x10/0x10
[ 73.575050][ T6012] misc_open+0x2d5/0x350
[ 73.576648][ T6012] chrdev_open+0x4cd/0x5e0
[ 73.578368][ T6012] ? __pfx_chrdev_open+0x10/0x10
[ 73.580319][ T6012] ? fsnotify_open_perm_and_set_mode+0x135/0x6d0
[ 73.582694][ T6012] ? __pfx_chrdev_open+0x10/0x10
[ 73.584668][ T6012] do_dentry_open+0x785/0x14e0
[ 73.586509][ T6012] vfs_open+0x3b/0x340
[ 73.587732][ T6012] ? path_openat+0x2df0/0x3860
[ 73.589234][ T6012] path_openat+0x2e08/0x3860
[ 73.590842][ T6012] ? __pfx_stack_trace_save+0x10/0x10
[ 73.592872][ T6012] ? stack_depot_save_flags+0x33/0x810
[ 73.594680][ T6012] ? __pfx_path_openat+0x10/0x10
[ 73.596838][ T6012] ? __x64_sys_openat+0x138/0x170
[ 73.598601][ T6012] ? __lock_acquire+0x6b5/0x2cf0
[ 73.600501][ T6012] do_file_open+0x23e/0x4a0
[ 73.601927][ T6012] ? __pfx_do_file_open+0x10/0x10
[ 73.603899][ T6012] ? _raw_spin_unlock+0x28/0x50
[ 73.605706][ T6012] ? alloc_fd+0x64b/0x6c0
[ 73.607371][ T6012] do_sys_openat2+0x113/0x200
[ 73.610046][ T6012] ? __pfx_do_sys_openat2+0x10/0x10
[ 73.612108][ T6012] ? exc_page_fault+0x6a/0xc0
[ 73.613771][ T6012] ? do_user_addr_fault+0xc6f/0x1340
[ 73.615187][ T6012] __x64_sys_openat+0x138/0x170
[ 73.616559][ T6012] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 73.618291][ T6012] do_syscall_64+0x15f/0xf80
[ 73.620027][ T6012] ? trace_irq_disable+0x3b/0x140
[ 73.621916][ T6012] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 73.624130][ T6012] RIP: 0033:0x7fa41279c819
[ 73.625794][ T6012] 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
[ 73.632931][ T6012] RSP: 002b:00007ffe78b24f18 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
[ 73.636023][ T6012] RAX: ffffffffffffffda RBX: 00007fa412a15fa0 RCX: 00007fa41279c819
[ 73.638982][ T6012] RDX: 0000000000000002 RSI: 0000200000000040 RDI: ffffffffffffff9c
[ 73.641949][ T6012] RBP: 00007fa412832c91 R08: 0000000000000000 R09: 0000000000000000
[ 73.644894][ T6012] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 73.647732][ T6012] R13: 00007fa412a15fac R14: 00007fa412a15fa0 R15: 00007fa412a15fa0
[ 73.650040][ T6012]
[ 73.650958][ T6012] Modules linked in:
[ 73.652768][ T6012] ---[ end trace 0000000000000000 ]---
SYZFAIL: failed to recv rpc
fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor)
[ 73.725306][ T6012] RIP: 0010:fuse_dev_alloc_install+0x39/0x80
[ 73.732212][ T6012] Code: e8 bc f8 ff ff 48 89 c3 48 85 c0 74 47 e8 7f 57 7f fe 49 8d be 30 02 00 00 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 6c 94 e9 fe 49 8b 96 30 02 00 00 49 c7 86 30
[ 73.760459][ T6012] RSP: 0018:ffffc90006857710 EFLAGS: 00010202
[ 73.769025][ T6012] RAX: 0000000000000046 RBX: ffff888166f66700 RCX: dffffc0000000000
[ 73.776053][ T6012] RDX: 0000000000000000 RSI: ffffffff8dfcdb14 RDI: 0000000000000230
[ 73.788570][ T6012] RBP: ffff888161a91c90 R08: ffffffff9032e7f7 R09: 1ffffffff2065cfe
[ 73.796439][ T6012] R10: dffffc0000000000 R11: fffffbfff2065cff R12: ffff888107732840
[ 73.802427][ T6012] R13: ffff888107732810 R14: 0000000000000000 R15: ffff888107732800
[ 73.807587][ T6012] FS: 0000555569268500(0000) GS:ffff8882a922f000(0000) knlGS:0000000000000000
[ 73.811545][ T6012] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 73.815312][ T6012] CR2: 000055dad81327b0 CR3: 0000000173864000 CR4: 00000000000006f0
[ 73.818882][ T6012] Kernel panic - not syncing: Fatal exception
[ 73.821885][ T6012] Kernel Offset: disabled
[ 73.823515][ T6012] Rebooting in 86400 seconds..