Reminder: 5 open syzbot bugs in "fs/fuse" subsystem

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Of the currently open syzbot reports against the upstream kernel, I've manually
marked 5 of them as possibly being bugs in the "fs/fuse" subsystem.  I've listed
these reports below, sorted by an algorithm that tries to list first the reports
most likely to be still valid, important, and actionable.

Of these 5 bugs, 1 was seen in mainline in the last week.

If you believe a bug is no longer valid, please close the syzbot report by
sending a '#syz fix', '#syz dup', or '#syz invalid' command in reply to the
original thread, as explained at https://goo.gl/tpsmEJ#status

If you believe I misattributed a bug to the "fs/fuse" subsystem, please let me
know, and if possible forward the report to the correct people or mailing list.

Here are the bugs:

--------------------------------------------------------------------------------
Title:              WARNING in __device_add_disk
Last occurred:      0 days ago
Reported:           460 days ago
Branches:           Mainline and others
Dashboard link:     https://syzkaller.appspot.com/bug?id=de24bb052989af7a72e7bf51895242e5c0fbda94
Original thread:    https://lkml.kernel.org/lkml/0000000000001558f3056a369689@xxxxxxxxxx/T/#u

This bug has a C reproducer.

No one replied to the original thread for this bug.

If you fix this bug, please add the following tag to the commit:
    Reported-by: syzbot+3337db851ace689ceb50@xxxxxxxxxxxxxxxxxxxxxxxxx

If you send any email or patch for this bug, please consider replying to the
original thread.  For the git send-email command to use, or tips on how to reply
if the thread isn't in your mailbox, see the "Reply instructions" at
https://lkml.kernel.org/r/0000000000001558f3056a369689@xxxxxxxxxx

--------------------------------------------------------------------------------
Title:              possible deadlock in free_ioctx_users
Last occurred:      20 days ago
Reported:           317 days ago
Branches:           Mainline and others
Dashboard link:     https://syzkaller.appspot.com/bug?id=7a5eef8441d0a76d4ac12b35f3633885dbb9d04e
Original thread:    https://lkml.kernel.org/lkml/00000000000024df4605757495a8@xxxxxxxxxx/T/#u

This bug has a C reproducer.

The original thread for this bug received 5 replies; the last was 316 days ago.

If you fix this bug, please add the following tag to the commit:
    Reported-by: syzbot+d86c4426a01f60feddc7@xxxxxxxxxxxxxxxxxxxxxxxxx

If you send any email or patch for this bug, please consider replying to the
original thread.  For the git send-email command to use, or tips on how to reply
if the thread isn't in your mailbox, see the "Reply instructions" at
https://lkml.kernel.org/r/00000000000024df4605757495a8@xxxxxxxxxx

--------------------------------------------------------------------------------
Title:              KASAN: slab-out-of-bounds Write in end_requests
Last occurred:      354 days ago
Reported:           358 days ago
Branches:           Mainline
Dashboard link:     https://syzkaller.appspot.com/bug?id=400d6a977a0dbd8836d7c7ec8481782a674ee855
Original thread:    https://lkml.kernel.org/lkml/000000000000d0429205723824d8@xxxxxxxxxx/T/#u

This bug has a C reproducer.

No one replied to the original thread for this bug.

If you fix this bug, please add the following tag to the commit:
    Reported-by: syzbot+cd4b9b3648c78dbd7fca@xxxxxxxxxxxxxxxxxxxxxxxxx

If you send any email or patch for this bug, please consider replying to the
original thread.  For the git send-email command to use, or tips on how to reply
if the thread isn't in your mailbox, see the "Reply instructions" at
https://lkml.kernel.org/r/000000000000d0429205723824d8@xxxxxxxxxx

--------------------------------------------------------------------------------
Title:              INFO: task hung in fuse_reverse_inval_entry
Last occurred:      352 days ago
Reported:           365 days ago
Branches:           Mainline and others
Dashboard link:     https://syzkaller.appspot.com/bug?id=ae8cd67e7e816f210105fee7719de41d6bcd010c
Original thread:    https://lkml.kernel.org/lkml/000000000000bc17b60571a60434@xxxxxxxxxx/T/#u

This bug has a C reproducer.

The original thread for this bug received 14 replies; the last was 263 days ago.

If you fix this bug, please add the following tag to the commit:
    Reported-by: syzbot+bb6d800770577a083f8c@xxxxxxxxxxxxxxxxxxxxxxxxx

If you send any email or patch for this bug, please consider replying to the
original thread.  For the git send-email command to use, or tips on how to reply
if the thread isn't in your mailbox, see the "Reply instructions" at
https://lkml.kernel.org/r/000000000000bc17b60571a60434@xxxxxxxxxx

--------------------------------------------------------------------------------
Title:              WARNING in request_end
Last occurred:      265 days ago
Reported:           302 days ago
Branches:           Mainline and others
Dashboard link:     https://syzkaller.appspot.com/bug?id=2318b559efec9fda6c77bd5c3d57c8fc3255d922
Original thread:    https://lkml.kernel.org/lkml/0000000000006971fa05769d22f6@xxxxxxxxxx/T/#u

This bug has a C reproducer.

syzbot has bisected this bug, but I think the bisection result is incorrect.

The original thread for this bug received 6 replies; the last was 122 days ago.

If you fix this bug, please add the following tag to the commit:
    Reported-by: syzbot+ef054c4d3f64cd7f7cec@xxxxxxxxxxxxxxxxxxxxxxxxx

If you send any email or patch for this bug, please consider replying to the
original thread.  For the git send-email command to use, or tips on how to reply
if the thread isn't in your mailbox, see the "Reply instructions" at
https://lkml.kernel.org/r/0000000000006971fa05769d22f6@xxxxxxxxxx




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