FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 1
CPU: 0 PID: 4838 Comm: syz-executor.6 Not tainted 6.0.0-rc1-next-20220819 #1
BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1521
in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 4838, name: syz-executor.6
preempt_count: 0, expected: 0
RCU nest depth: 0, expected: 0
no locks held by syz-executor.6/4838.
irq event stamp: 292
hardirqs last  enabled at (291): [<ffffffff812bd8c8>] __up_console_sem+0x78/0x80
hardirqs last disabled at (292): [<ffffffff8411f196>] dump_stack_lvl+0x2e/0xb3
softirqs last  enabled at (286): [<ffffffff8116ba5b>] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (271): [<ffffffff8116ba5b>] __irq_exit_rcu+0x11b/0x180
CPU: 0 PID: 4838 Comm: syz-executor.6 Not tainted 6.0.0-rc1-next-20220819 #1
syz-executor.6[4838] cmdline: /syz-executor.6 exec
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x8b/0xb3
 __might_resched.cold+0x222/0x26b
 down_read_killable+0x75/0x490
 __access_remote_vm+0xac/0x6f0
 get_mm_cmdline.part.0+0x214/0x600
 get_task_cmdline_kernel+0x1e9/0x230
 dump_stack_print_cmdline.part.0+0x82/0x150
 dump_stack_print_info+0x185/0x190
 dump_stack_lvl+0x7f/0xb3
 should_fail.cold+0x5/0xa
 strncpy_from_user+0x34/0x3e0
 getname_flags.part.0+0x95/0x4f0
 getname_flags+0x9a/0xe0
 __x64_sys_mknodat+0x9e/0xe0
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f097d984b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f097aefa188 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007f097da97f60 RCX: 00007f097d984b19
RDX: 0000000000000000 RSI: 0000000020001ac0 RDI: 0000000000000003
RBP: 00007f097aefa1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000070c R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe009e6e9f R14: 00007f097aefa300 R15: 0000000000022000
 </TASK>
Zero length message leads to an empty skb
syz-executor.6[4838] cmdline: /syz-executor.6 exec
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x8b/0xb3
 should_fail.cold+0x5/0xa
 strncpy_from_user+0x34/0x3e0
 getname_flags.part.0+0x95/0x4f0
 getname_flags+0x9a/0xe0
 __x64_sys_mknodat+0x9e/0xe0
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f097d984b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f097aefa188 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007f097da97f60 RCX: 00007f097d984b19
RDX: 0000000000000000 RSI: 0000000020001ac0 RDI: 0000000000000003
RBP: 00007f097aefa1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000070c R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe009e6e9f R14: 00007f097aefa300 R15: 0000000000022000
 </TASK>
EXT4-fs warning (device sda): ext4_group_extend:1850: can't shrink FS - resize aborted