FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 3629 Comm: syz-executor241 Not tainted 6.0.0-rc1-next-20220819-syzkaller #0 BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1521 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 3629, name: syz-executor241 preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 2 locks held by syz-executor241/3629: #0: ffff88801fe18098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffff88801fe18130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:950 [inline] #1: ffff88801fe18130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:973 [inline] #1: ffff88801fe18130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x296/0x8f0 drivers/tty/tty_io.c:1095 irq event stamp: 3494 hardirqs last enabled at (3493): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1352 [inline] hardirqs last enabled at (3493): [] finish_lock_switch kernel/sched/core.c:4956 [inline] hardirqs last enabled at (3493): [] finish_task_switch.isra.0+0x2b5/0xc70 kernel/sched/core.c:5074 hardirqs last disabled at (3494): [] dump_stack_lvl+0x2e/0x134 lib/dump_stack.c:139 softirqs last enabled at (3482): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last enabled at (3482): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 softirqs last disabled at (3459): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last disabled at (3459): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 CPU: 1 PID: 3629 Comm: syz-executor241 Not tainted 6.0.0-rc1-next-20220819-syzkaller #0 syz-executor241[3629] cmdline: ./syz-executor2418713577 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:122 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:140 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9896 down_read_killable+0x75/0x490 kernel/locking/rwsem.c:1521 mmap_read_lock_killable include/linux/mmap_lock.h:126 [inline] __access_remote_vm+0xac/0x6f0 mm/memory.c:5461 get_mm_cmdline.part.0+0x217/0x620 fs/proc/base.c:299 get_mm_cmdline fs/proc/base.c:367 [inline] get_task_cmdline_kernel+0x1d9/0x220 fs/proc/base.c:367 dump_stack_print_cmdline.part.0+0x82/0x150 lib/dump_stack.c:61 dump_stack_print_cmdline lib/dump_stack.c:89 [inline] dump_stack_print_info+0x185/0x190 lib/dump_stack.c:97 __dump_stack lib/dump_stack.c:121 [inline] dump_stack_lvl+0xc1/0x134 lib/dump_stack.c:140 fail_dump lib/fault-inject.c:55 [inline] should_fail.cold+0x5/0xa lib/fault-inject.c:155 copyin+0x19/0x120 lib/iov_iter.c:177 _copy_from_iter+0x1ca/0x11c0 lib/iov_iter.c:628 copy_from_iter include/linux/uio.h:184 [inline] do_tty_write drivers/tty/tty_io.c:1021 [inline] file_tty_write.constprop.0+0x449/0x8f0 drivers/tty/tty_io.c:1095 call_write_iter include/linux/fs.h:2188 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x9e9/0xdd0 fs/read_write.c:578 ksys_write+0x127/0x250 fs/read_write.c:631 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f04aab85059 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe7b521b48 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f04aab85059 RDX: 000000000000ff2e RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ffe7b521b60 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 syz-executor241[3629] cmdline: ./syz-executor2418713577 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:122 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:140 fail_dump lib/fault-inject.c:55 [inline] should_fail.cold+0x5/0xa lib/fault-inject.c:155 copyin+0x19/0x120 lib/iov_iter.c:177 _copy_from_iter+0x1ca/0x11c0 lib/iov_iter.c:628 copy_from_iter include/linux/uio.h:184 [inline] do_tty_write drivers/tty/tty_io.c:1021 [inline] file_tty_write.constprop.0+0x449/0x8f0 drivers/tty/tty_io.c:1095 call_write_iter include/linux/fs.h:2188 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x9e9/0xdd0 fs/read_write.c:578 ksys_write+0x127/0x250 fs/read_write.c:631 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f04aab85059 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe7b521b48 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f04aab85059 RDX: 000000000000ff2e RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ffe7b521b60 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000