memory leak in iovec_from

Title	Replies (including bot)	Last reply
[PATCH 5.17 000/146] 5.17.5-rc1 review	156 (156)	2022/04/27 10:01
[PATCH] io_uring: free iovec if file assignment fails	1 (1)	2022/04/17 13:43
[syzbot] memory leak in iovec_from_user	2 (4)	2022/04/17 13:37

Title

Replies (including bot)

Last reply

[PATCH 5.17 000/146] 5.17.5-rc1 review

156 (156)

2022/04/27 10:01

[PATCH] io_uring: free iovec if file assignment fails

1 (1)

2022/04/17 13:43

[syzbot] memory leak in iovec_from_user

2 (4)

2022/04/17 13:37

Kernel	Title	Rank 🛈	Repro	Count	Last	Reported	Patched	Status
upstream	memory leak in iovec_from_user (3) io-uring	3	syz, C	1	206d	205d	0/29	closed as invalid on 2026/01/12 19:36
upstream	memory leak in iovec_from_user (2) io-uring	3	syz, C	1	271d	268d	29/29	fixed on 2026/01/07 12:29
upstream	memory leak in iovec_from_user (5) io-uring	3	syz	1	203d	199d	0/29	closed as invalid on 2026/01/18 18:44
upstream	memory leak in iovec_from_user (4) io-uring	3	syz, C	1	204d	204d	0/29	closed as invalid on 2026/01/14 16:09

Created	Duration	User	Patch	Repo	Result
2022/04/17 13:27	9m	axboe@kernel.dk		git://git.kernel.dk/linux-block io_uring-5.18	OK

Created

Duration

User

Patch

Repo

Result

2022/04/17 13:27

axboe@kernel.dk

git://git.kernel.dk/linux-block io_uring-5.18

executing program BUG: memory leak unreferenced object 0xffff88810d698300 (size 192): comm "syz-executor156", pid 3595, jiffies 4294944234 (age 12.580s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff823357be>] kmalloc_array include/linux/slab.h:621 [inline] [<ffffffff823357be>] iovec_from_user lib/iov_iter.c:1922 [inline] [<ffffffff823357be>] iovec_from_user+0x13e/0x280 lib/iov_iter.c:1905 [<ffffffff82335945>] __import_iovec+0x45/0x250 lib/iov_iter.c:1948 [<ffffffff81668c8e>] __io_import_iovec+0xfe/0x800 fs/io_uring.c:3497 [<ffffffff8166d92f>] io_import_iovec fs/io_uring.c:3508 [inline] [<ffffffff8166d92f>] io_read+0x59f/0x880 fs/io_uring.c:3803 [<ffffffff816727b4>] io_issue_sqe+0x364/0x3270 fs/io_uring.c:7122 [<ffffffff816761c3>] __io_queue_sqe fs/io_uring.c:7489 [inline] [<ffffffff816761c3>] io_queue_sqe fs/io_uring.c:7531 [inline] [<ffffffff816761c3>] io_submit_sqe fs/io_uring.c:7736 [inline] [<ffffffff816761c3>] io_submit_sqes+0x553/0x3030 fs/io_uring.c:7842 [<ffffffff81679390>] __do_sys_io_uring_enter+0x6f0/0x1100 fs/io_uring.c:10780 [<ffffffff8451ca25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff8451ca25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff88810d6983c0 (size 192): comm "syz-executor156", pid 3603, jiffies 4294944759 (age 7.330s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff823357be>] kmalloc_array include/linux/slab.h:621 [inline] [<ffffffff823357be>] iovec_from_user lib/iov_iter.c:1922 [inline] [<ffffffff823357be>] iovec_from_user+0x13e/0x280 lib/iov_iter.c:1905 [<ffffffff82335945>] __import_iovec+0x45/0x250 lib/iov_iter.c:1948 [<ffffffff81668c8e>] __io_import_iovec+0xfe/0x800 fs/io_uring.c:3497 [<ffffffff8166d92f>] io_import_iovec fs/io_uring.c:3508 [inline] [<ffffffff8166d92f>] io_read+0x59f/0x880 fs/io_uring.c:3803 [<ffffffff816727b4>] io_issue_sqe+0x364/0x3270 fs/io_uring.c:7122 [<ffffffff816761c3>] __io_queue_sqe fs/io_uring.c:7489 [inline] [<ffffffff816761c3>] io_queue_sqe fs/io_uring.c:7531 [inline] [<ffffffff816761c3>] io_submit_sqe fs/io_uring.c:7736 [inline] [<ffffffff816761c3>] io_submit_sqes+0x553/0x3030 fs/io_uring.c:7842 [<ffffffff81679390>] __do_sys_io_uring_enter+0x6f0/0x1100 fs/io_uring.c:10780 [<ffffffff8451ca25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff8451ca25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae