EXT4-fs (loop7): VFS: Can't find ext4 filesystem
msdos: Unknown parameter ''
------------[ cut here ]------------
strnlen: detected buffer overflow: 65 byte read of buffer size 64
msdos: Unknown parameter ''
WARNING: lib/string_helpers.c:1035 at __fortify_report+0x97/0xb0, CPU#1: syz-executor.3/5040
Modules linked in:
CPU: 1 UID: 0 PID: 5040 Comm: syz-executor.3 Not tainted 6.17.0-rc7-next-20250926 #1 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:__fortify_report+0x97/0xb0
Code: 85 49 c7 c5 c0 e7 02 85 4c 0f 45 e9 e8 92 55 21 ff 49 89 e8 4c 89 e2 4c 89 f6 4c 89 e9 48 c7 c7 40 e8 02 85 e8 8a 3e e7 fe 90 <0f> 0b 90 90 5b 5d 41 5c 41 5d 41 5e e9 28 40 6f 02 e8 93 f7 5d ff
RSP: 0018:ffff888049cd7a30 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc90007825000
RDX: 0000000000040000 RSI: ffffffff8139e00e RDI: 0000000000000001
RBP: 0000000000000040 R08: 0000000000000001 R09: ffffed100939af01
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000041
R13: ffffffff8502e7c0 R14: ffffffff8502f180 R15: ffff8880165d0000
FS: 00007f0dda93f700(0000) GS:ffff8880e54be000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 000000003d942000 CR4: 0000000000350ef0
Call Trace:
__fortify_panic+0x23/0x30
ext4_fill_super+0x368f/0xb910
get_tree_bdev_flags+0x38a/0x620
vfs_get_tree+0x93/0x340
path_mount+0x720/0x20e0
__x64_sys_mount+0x293/0x310
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0ddd3cb04a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0dda93efa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f0ddd3cb04a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f0dda93f000
RBP: 00007f0dda93f040 R08: 00007f0dda93f040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f0dda93f000 R15: 0000000020013800
irq event stamp: 2503
hardirqs last enabled at (2511): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (2520): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (2356): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (2351): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
kernel BUG at lib/string_helpers.c:1043!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5040 Comm: syz-executor.3 Tainted: G W 6.17.0-rc7-next-20250926 #1 PREEMPT(voluntary)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:__fortify_panic+0x24/0x30
Code: 90 90 90 90 90 90 f3 0f 1e fa 41 54 49 89 d4 55 48 89 f5 53 89 fb e8 3b 55 21 ff 0f b6 fb 4c 89 e2 48 89 ee e8 1d ff ff ff 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffff888049cd7a60 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffc90007825000
RDX: 0000000000040000 RSI: ffffffff8139e00e RDI: 0000000000000001
RBP: 0000000000000040 R08: 0000000000000001 R09: ffffed100939af01
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000041
R13: ffff88800f118400 R14: ffff88800f118400 R15: ffff8880165d0000
FS: 00007f0dda93f700(0000) GS:ffff8880e54be000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 000000003d942000 CR4: 0000000000350ef0
Call Trace:
ext4_fill_super+0x368f/0xb910
get_tree_bdev_flags+0x38a/0x620
vfs_get_tree+0x93/0x340
path_mount+0x720/0x20e0
__x64_sys_mount+0x293/0x310
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0ddd3cb04a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0dda93efa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f0ddd3cb04a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f0dda93f000
RBP: 00007f0dda93f040 R08: 00007f0dda93f040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f0dda93f000 R15: 0000000020013800
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__fortify_panic+0x24/0x30
Code: 90 90 90 90 90 90 f3 0f 1e fa 41 54 49 89 d4 55 48 89 f5 53 89 fb e8 3b 55 21 ff 0f b6 fb 4c 89 e2 48 89 ee e8 1d ff ff ff 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffff888049cd7a60 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffc90007825000
RDX: 0000000000040000 RSI: ffffffff8139e00e RDI: 0000000000000001
RBP: 0000000000000040 R08: 0000000000000001 R09: ffffed100939af01
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000041
R13: ffff88800f118400 R14: ffff88800f118400 R15: ffff8880165d0000
FS: 00007f0dda93f700(0000) GS:ffff8880e54be000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 000000003d942000 CR4: 0000000000350ef0
loop7: detected capacity change from 0 to 4095
EXT4-fs (loop7): VFS: Can't find ext4 filesystem
audit: type=1400 audit(1759093332.913:13): avc: denied { watch_reads } for pid=5044 comm="syz-executor.0" path="/syzkaller-testdir517136874/syzkaller.JEV6iJ/1/file0" dev="sda" ino=16024 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file permissive=1
loop4: detected capacity change from 0 to 126
loop4: detected capacity change from 0 to 126
loop7: detected capacity change from 0 to 4095
EXT4-fs (loop7): VFS: Can't find ext4 filesystem
kmemleak: 6 new suspected memory leaks (see /sys/kernel/debug/kmemleak)