Revision 3b7995a98ad76da5597b488fa84aa5a56d43b608 authored by Yang Yingliang on 18 December 2019, 08:44:04 UTC, committed by Jens Axboe on 20 December 2019, 18:52:01 UTC
When I doing fuzzy test, get the memleak report: BUG: memory leak unreferenced object 0xffff88837af80000 (size 4096): comm "memleak", pid 3557, jiffies 4294817681 (age 112.499s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 20 00 00 00 10 01 00 00 00 00 00 00 01 00 00 00 ............... backtrace: [<000000001c894df8>] bio_alloc_bioset+0x393/0x590 [<000000008b139a3c>] bio_copy_user_iov+0x300/0xcd0 [<00000000a998bd8c>] blk_rq_map_user_iov+0x2f1/0x5f0 [<000000005ceb7f05>] blk_rq_map_user+0xf2/0x160 [<000000006454da92>] sg_common_write.isra.21+0x1094/0x1870 [<00000000064bb208>] sg_write.part.25+0x5d9/0x950 [<000000004fc670f6>] sg_write+0x5f/0x8c [<00000000b0d05c7b>] __vfs_write+0x7c/0x100 [<000000008e177714>] vfs_write+0x1c3/0x500 [<0000000087d23f34>] ksys_write+0xf9/0x200 [<000000002c8dbc9d>] do_syscall_64+0x9f/0x4f0 [<00000000678d8e9a>] entry_SYSCALL_64_after_hwframe+0x49/0xbe If __blk_rq_map_user_iov() is failed in blk_rq_map_user_iov(), the bio(s) which is allocated before this failing will leak. The refcount of the bio(s) is init to 1 and increased to 2 by calling bio_get(), but __blk_rq_unmap_user() only decrease it to 1, so the bio cannot be freed. Fix it by calling blk_rq_unmap_user(). Reviewed-by: Bob Liu <bob.liu@oracle.com> Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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File | Mode | Size |
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aoe | ||
drbd | ||
mtip32xx | ||
paride | ||
rsxx | ||
xen-blkback | ||
zram | ||
Kconfig | -rw-r--r-- | 16.3 KB |
Makefile | -rw-r--r-- | 1.4 KB |
amiflop.c | -rw-r--r-- | 50.0 KB |
ataflop.c | -rw-r--r-- | 54.6 KB |
brd.c | -rw-r--r-- | 12.9 KB |
cryptoloop.c | -rw-r--r-- | 4.3 KB |
floppy.c | -rw-r--r-- | 127.4 KB |
loop.c | -rw-r--r-- | 57.0 KB |
loop.h | -rw-r--r-- | 2.3 KB |
nbd.c | -rw-r--r-- | 60.1 KB |
null_blk.h | -rw-r--r-- | 3.6 KB |
null_blk_main.c | -rw-r--r-- | 45.0 KB |
null_blk_zoned.c | -rw-r--r-- | 5.4 KB |
pktcdvd.c | -rw-r--r-- | 73.0 KB |
ps3disk.c | -rw-r--r-- | 13.5 KB |
ps3vram.c | -rw-r--r-- | 22.1 KB |
rbd.c | -rw-r--r-- | 184.5 KB |
rbd_types.h | -rw-r--r-- | 2.5 KB |
skd_main.c | -rw-r--r-- | 93.1 KB |
skd_s1120.h | -rw-r--r-- | 9.3 KB |
sunvdc.c | -rw-r--r-- | 28.7 KB |
swim.c | -rw-r--r-- | 20.2 KB |
swim3.c | -rw-r--r-- | 31.3 KB |
swim_asm.S | -rw-r--r-- | 4.4 KB |
sx8.c | -rw-r--r-- | 37.2 KB |
umem.c | -rw-r--r-- | 29.8 KB |
umem.h | -rw-r--r-- | 3.6 KB |
virtio_blk.c | -rw-r--r-- | 27.0 KB |
xen-blkfront.c | -rw-r--r-- | 73.6 KB |
xsysace.c | -rw-r--r-- | 33.4 KB |
z2ram.c | -rw-r--r-- | 9.5 KB |
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