loop6: detected capacity change from 0 to 40 FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 4721 Comm: syz-executor.3 Not tainted 6.0.0-rc1-next-20220818 #1 BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1521 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 4721, name: syz-executor.3 preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 1 lock held by syz-executor.3/4721: #0: ffff8880467a74e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe7/0x100 irq event stamp: 534 hardirqs last enabled at (533): [] __up_console_sem+0x78/0x80 hardirqs last disabled at (534): [] dump_stack_lvl+0x2e/0xb3 softirqs last enabled at (526): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (509): [] __irq_exit_rcu+0x11b/0x180 CPU: 1 PID: 4721 Comm: syz-executor.3 Not tainted 6.0.0-rc1-next-20220818 #1 syz-executor.3[4721] cmdline: /syz-executor.3 exec Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: 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 _copy_to_user+0x2a/0x140 simple_read_from_buffer+0xcc/0x160 proc_fail_nth_read+0x198/0x230 vfs_read+0x253/0x930 ksys_read+0x127/0x250 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f30f5aed69c Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 2f fd ff ff 48 RSP: 002b:00007f30f30b0170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f30f5aed69c RDX: 000000000000000f RSI: 00007f30f30b01e0 RDI: 0000000000000003 RBP: 00007f30f30b01d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffcea1dfb2f R14: 00007f30f30b0300 R15: 0000000000022000 syz-executor.3[4721] cmdline: /syz-executor.3 exec Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack_lvl+0x8b/0xb3 should_fail.cold+0x5/0xa _copy_to_user+0x2a/0x140 simple_read_from_buffer+0xcc/0x160 proc_fail_nth_read+0x198/0x230 vfs_read+0x253/0x930 ksys_read+0x127/0x250 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f30f5aed69c Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 2f fd ff ff 48 RSP: 002b:00007f30f30b0170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f30f5aed69c RDX: 000000000000000f RSI: 00007f30f30b01e0 RDI: 0000000000000003 RBP: 00007f30f30b01d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffcea1dfb2f R14: 00007f30f30b0300 R15: 0000000000022000 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1 sclass=netlink_route_socket pid=4726 comm=syz-executor.4 process 'syz-executor.7' launched './file1' with NULL argv: empty string added SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1 sclass=netlink_route_socket pid=4742 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1 sclass=netlink_route_socket pid=4757 comm=syz-executor.4