FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 1
CPU: 0 PID: 4494 Comm: syz-executor.1 Not tainted 6.0.0-rc1-next-20220822 #1
BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1521
in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 4494, name: syz-executor.1
preempt_count: 0, expected: 0
RCU nest depth: 0, expected: 0
no locks held by syz-executor.1/4494.
irq event stamp: 236
hardirqs last  enabled at (235): [<ffffffff812c4d62>] vprintk_emit+0x502/0x560
hardirqs last disabled at (236): [<ffffffff841214f5>] dump_stack_lvl+0x2e/0xb3
softirqs last  enabled at (228): [<ffffffff8116ca6b>] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (197): [<ffffffff8116ca6b>] __irq_exit_rcu+0x11b/0x180
CPU: 0 PID: 4494 Comm: syz-executor.1 Not tainted 6.0.0-rc1-next-20220822 #1
syz-executor.1[4494] cmdline: /syz-executor.1 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
 copyin+0x19/0x120
 _copy_from_iter+0x1d2/0x1210
 copy_page_from_iter+0x24c/0x510
 tun_build_skb+0x2d2/0x1130
 tun_get_user+0x6fb/0x3620
 tun_chr_write_iter+0xdb/0x1e0
 vfs_write+0x9c3/0xd90
 ksys_write+0x127/0x250
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f14df8595ff
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 cc fd ff ff 48
RSP: 002b:00007f14dce1c150 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f14df9b9f60 RCX: 00007f14df8595ff
RDX: 0000000000000046 RSI: 0000000020000100 RDI: 00000000000000f0
RBP: 00007f14dce1c1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffedf0d129f R14: 00007f14dce1c300 R15: 0000000000022000
 </TASK>
loop7: detected capacity change from 0 to 255
syz-executor.1[4494] cmdline: /syz-executor.1 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
 copyin+0x19/0x120
 _copy_from_iter+0x1d2/0x1210
 copy_page_from_iter+0x24c/0x510
 tun_build_skb+0x2d2/0x1130
 tun_get_user+0x6fb/0x3620
 tun_chr_write_iter+0xdb/0x1e0
 vfs_write+0x9c3/0xd90
 ksys_write+0x127/0x250
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f14df8595ff
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 cc fd ff ff 48
RSP: 002b:00007f14dce1c150 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f14df9b9f60 RCX: 00007f14df8595ff
RDX: 0000000000000046 RSI: 0000000020000100 RDI: 00000000000000f0
RBP: 00007f14dce1c1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffedf0d129f R14: 00007f14dce1c300 R15: 0000000000022000
 </TASK>
loop7: detected capacity change from 0 to 255
loop7: detected capacity change from 0 to 255
syz-executor.0: attempt to access beyond end of device
loop0: rw=2049, sector=40, nr_sectors = 4 limit=40
buffer_io_error: 111 callbacks suppressed
Buffer I/O error on dev loop0, logical block 10, lost async page write