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* [PATCH] io_uring: use io_poll_get_double in io_poll_double_wake
@ 2021-06-10  8:45 Hao Xu
  2021-06-10  8:59 ` Pavel Begunkov
  0 siblings, 1 reply; 3+ messages in thread
From: Hao Xu @ 2021-06-10  8:45 UTC (permalink / raw)
  To: Jens Axboe; +Cc: io-uring, Pavel Begunkov, Joseph Qi

Correct wrong use of io_poll_get_single in io_poll_double_wake, which
I think is a slip-up.

[   55.204528] WARNING: CPU: 0 PID: 2660 at fs/io_uring.c:1512 io_poll_double_wake+0x1d6/0x1f0
[   55.204546] Modules linked in:
[   55.204560] CPU: 0 PID: 2660 Comm: a.out Not tainted 5.13.0-rc3+ #1
[   55.204575] RIP: 0010:io_poll_double_wake+0x1d6/0x1f0
[   55.204584] Code: ff 48 89 eb e9 8b fe ff ff e8 c6 68 d3 ff 49 c7 44 24 08 00 00 00 00 48 8b 7b 08 e8 e4 7b 9d 00 e9 5d ff ff ff e8 aa 68 d3 ff <0f> 0b e9 76 ff ff ff e8 9e 68 d3 ff 0f 0b e9 59 ff ff ff 0f 1f 80
[   55.204592] RSP: 0018:ffffc90003c73cc8 EFLAGS: 00010093
[   55.204599] RAX: 0000000000000000 RBX: ffff88810fcf6500 RCX: 0000000000000000
[   55.204604] RDX: ffff88810d38b500 RSI: ffffffff814d3dd6 RDI: ffff88810ff5fd60
[   55.204610] RBP: ffff88810fcf6500 R08: ffff88810d38bf38 R09: 00000000fffffffe
[   55.204615] R10: 00000000e2886200 R11: 000000005dbbc615 R12: ffff88810d068658
[   55.204620] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000040000000
[   55.204625] FS:  00007f84d6170700(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
[   55.204635] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   55.204640] CR2: 00007f84d616fef8 CR3: 000000010ffd2006 CR4: 00000000001706f0
[   55.204646] Call Trace:
[   55.204656]  __wake_up_common+0x9f/0x1b0
[   55.204674]  __wake_up_common_lock+0x7a/0xc0
[   55.204694]  tty_ldisc_lock+0x44/0x80
[   55.204705]  tty_ldisc_hangup+0xe3/0x240
[   55.204719]  __tty_hangup+0x26b/0x360
[   55.204736]  tty_ioctl+0x6be/0xb20
[   55.204747]  ? do_vfs_ioctl+0x1af/0xaa0
[   55.204757]  ? __fget_files+0x15a/0x260
[   55.204774]  ? tty_vhangup+0x20/0x20
[   55.204787]  __x64_sys_ioctl+0xbb/0x100
[   55.204801]  do_syscall_64+0x36/0x70
[   55.204813]  entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported-by: Abaci <[email protected]>
Fixes: d4e7cd36a90e ("io_uring: sanitize double poll handling")
Signed-off-by: Hao Xu <[email protected]>
---
 fs/io_uring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index b2cc1e76d660..2be2db156094 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -4950,7 +4950,7 @@ static int io_poll_double_wake(struct wait_queue_entry *wait, unsigned mode,
 			       int sync, void *key)
 {
 	struct io_kiocb *req = wait->private;
-	struct io_poll_iocb *poll = io_poll_get_single(req);
+	struct io_poll_iocb *poll = io_poll_get_double(req);
 	__poll_t mask = key_to_poll(key);
 
 	/* for instances that support it check for an event match first: */
-- 
1.8.3.1


^ permalink raw reply related	[flat|nested] 3+ messages in thread

* Re: [PATCH] io_uring: use io_poll_get_double in io_poll_double_wake
  2021-06-10  8:45 [PATCH] io_uring: use io_poll_get_double in io_poll_double_wake Hao Xu
@ 2021-06-10  8:59 ` Pavel Begunkov
  2021-06-10  9:34   ` Hao Xu
  0 siblings, 1 reply; 3+ messages in thread
From: Pavel Begunkov @ 2021-06-10  8:59 UTC (permalink / raw)
  To: Hao Xu, Jens Axboe; +Cc: io-uring, Joseph Qi

On 6/10/21 9:45 AM, Hao Xu wrote:
> Correct wrong use of io_poll_get_single in io_poll_double_wake, which
> I think is a slip-up.

Not really. It removes both poll entries


> [   55.204528] WARNING: CPU: 0 PID: 2660 at fs/io_uring.c:1512 io_poll_double_wake+0x1d6/0x1f0
> [   55.204546] Modules linked in:
> [   55.204560] CPU: 0 PID: 2660 Comm: a.out Not tainted 5.13.0-rc3+ #1
> [   55.204575] RIP: 0010:io_poll_double_wake+0x1d6/0x1f0
> [   55.204584] Code: ff 48 89 eb e9 8b fe ff ff e8 c6 68 d3 ff 49 c7 44 24 08 00 00 00 00 48 8b 7b 08 e8 e4 7b 9d 00 e9 5d ff ff ff e8 aa 68 d3 ff <0f> 0b e9 76 ff ff ff e8 9e 68 d3 ff 0f 0b e9 59 ff ff ff 0f 1f 80
> [   55.204592] RSP: 0018:ffffc90003c73cc8 EFLAGS: 00010093
> [   55.204599] RAX: 0000000000000000 RBX: ffff88810fcf6500 RCX: 0000000000000000
> [   55.204604] RDX: ffff88810d38b500 RSI: ffffffff814d3dd6 RDI: ffff88810ff5fd60
> [   55.204610] RBP: ffff88810fcf6500 R08: ffff88810d38bf38 R09: 00000000fffffffe
> [   55.204615] R10: 00000000e2886200 R11: 000000005dbbc615 R12: ffff88810d068658
> [   55.204620] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000040000000
> [   55.204625] FS:  00007f84d6170700(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
> [   55.204635] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [   55.204640] CR2: 00007f84d616fef8 CR3: 000000010ffd2006 CR4: 00000000001706f0
> [   55.204646] Call Trace:
> [   55.204656]  __wake_up_common+0x9f/0x1b0
> [   55.204674]  __wake_up_common_lock+0x7a/0xc0
> [   55.204694]  tty_ldisc_lock+0x44/0x80
> [   55.204705]  tty_ldisc_hangup+0xe3/0x240
> [   55.204719]  __tty_hangup+0x26b/0x360
> [   55.204736]  tty_ioctl+0x6be/0xb20
> [   55.204747]  ? do_vfs_ioctl+0x1af/0xaa0
> [   55.204757]  ? __fget_files+0x15a/0x260
> [   55.204774]  ? tty_vhangup+0x20/0x20
> [   55.204787]  __x64_sys_ioctl+0xbb/0x100
> [   55.204801]  do_syscall_64+0x36/0x70
> [   55.204813]  entry_SYSCALL_64_after_hwframe+0x44/0xae
> 
> Reported-by: Abaci <[email protected]>
> Fixes: d4e7cd36a90e ("io_uring: sanitize double poll handling")
> Signed-off-by: Hao Xu <[email protected]>
> ---
>  fs/io_uring.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/io_uring.c b/fs/io_uring.c
> index b2cc1e76d660..2be2db156094 100644
> --- a/fs/io_uring.c
> +++ b/fs/io_uring.c
> @@ -4950,7 +4950,7 @@ static int io_poll_double_wake(struct wait_queue_entry *wait, unsigned mode,
>  			       int sync, void *key)
>  {
>  	struct io_kiocb *req = wait->private;
> -	struct io_poll_iocb *poll = io_poll_get_single(req);
> +	struct io_poll_iocb *poll = io_poll_get_double(req);
>  	__poll_t mask = key_to_poll(key);
>  
>  	/* for instances that support it check for an event match first: */
> 

-- 
Pavel Begunkov

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH] io_uring: use io_poll_get_double in io_poll_double_wake
  2021-06-10  8:59 ` Pavel Begunkov
@ 2021-06-10  9:34   ` Hao Xu
  0 siblings, 0 replies; 3+ messages in thread
From: Hao Xu @ 2021-06-10  9:34 UTC (permalink / raw)
  To: Pavel Begunkov, Jens Axboe; +Cc: io-uring, Joseph Qi

在 2021/6/10 下午4:59, Pavel Begunkov 写道:
> On 6/10/21 9:45 AM, Hao Xu wrote:
>> Correct wrong use of io_poll_get_single in io_poll_double_wake, which
>> I think is a slip-up.
> 
> Not really. It removes both poll entries
Yea, I see. I misunderstood the code..
> 
> 
>> [   55.204528] WARNING: CPU: 0 PID: 2660 at fs/io_uring.c:1512 io_poll_double_wake+0x1d6/0x1f0
>> [   55.204546] Modules linked in:
>> [   55.204560] CPU: 0 PID: 2660 Comm: a.out Not tainted 5.13.0-rc3+ #1
>> [   55.204575] RIP: 0010:io_poll_double_wake+0x1d6/0x1f0
>> [   55.204584] Code: ff 48 89 eb e9 8b fe ff ff e8 c6 68 d3 ff 49 c7 44 24 08 00 00 00 00 48 8b 7b 08 e8 e4 7b 9d 00 e9 5d ff ff ff e8 aa 68 d3 ff <0f> 0b e9 76 ff ff ff e8 9e 68 d3 ff 0f 0b e9 59 ff ff ff 0f 1f 80
>> [   55.204592] RSP: 0018:ffffc90003c73cc8 EFLAGS: 00010093
>> [   55.204599] RAX: 0000000000000000 RBX: ffff88810fcf6500 RCX: 0000000000000000
>> [   55.204604] RDX: ffff88810d38b500 RSI: ffffffff814d3dd6 RDI: ffff88810ff5fd60
>> [   55.204610] RBP: ffff88810fcf6500 R08: ffff88810d38bf38 R09: 00000000fffffffe
>> [   55.204615] R10: 00000000e2886200 R11: 000000005dbbc615 R12: ffff88810d068658
>> [   55.204620] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000040000000
>> [   55.204625] FS:  00007f84d6170700(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
>> [   55.204635] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> [   55.204640] CR2: 00007f84d616fef8 CR3: 000000010ffd2006 CR4: 00000000001706f0
>> [   55.204646] Call Trace:
>> [   55.204656]  __wake_up_common+0x9f/0x1b0
>> [   55.204674]  __wake_up_common_lock+0x7a/0xc0
>> [   55.204694]  tty_ldisc_lock+0x44/0x80
>> [   55.204705]  tty_ldisc_hangup+0xe3/0x240
>> [   55.204719]  __tty_hangup+0x26b/0x360
>> [   55.204736]  tty_ioctl+0x6be/0xb20
>> [   55.204747]  ? do_vfs_ioctl+0x1af/0xaa0
>> [   55.204757]  ? __fget_files+0x15a/0x260
>> [   55.204774]  ? tty_vhangup+0x20/0x20
>> [   55.204787]  __x64_sys_ioctl+0xbb/0x100
>> [   55.204801]  do_syscall_64+0x36/0x70
>> [   55.204813]  entry_SYSCALL_64_after_hwframe+0x44/0xae
>>
>> Reported-by: Abaci <[email protected]>
>> Fixes: d4e7cd36a90e ("io_uring: sanitize double poll handling")
>> Signed-off-by: Hao Xu <[email protected]>
>> ---
>>   fs/io_uring.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/fs/io_uring.c b/fs/io_uring.c
>> index b2cc1e76d660..2be2db156094 100644
>> --- a/fs/io_uring.c
>> +++ b/fs/io_uring.c
>> @@ -4950,7 +4950,7 @@ static int io_poll_double_wake(struct wait_queue_entry *wait, unsigned mode,
>>   			       int sync, void *key)
>>   {
>>   	struct io_kiocb *req = wait->private;
>> -	struct io_poll_iocb *poll = io_poll_get_single(req);
>> +	struct io_poll_iocb *poll = io_poll_get_double(req);
>>   	__poll_t mask = key_to_poll(key);
>>   
>>   	/* for instances that support it check for an event match first: */
>>
> 


^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2021-06-10  9:34 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2021-06-10  8:45 [PATCH] io_uring: use io_poll_get_double in io_poll_double_wake Hao Xu
2021-06-10  8:59 ` Pavel Begunkov
2021-06-10  9:34   ` Hao Xu

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