Created attachment 106021 [details] .config In next-20130624, next-20130625 and mmotm (v3.10-rc6-684-g9dcc58c), kmemleak complains about some ext4_mount related allocations. ---- # cat /sys/kernel/debug/kmemleak unreferenced object 0xffff880002a6dd80 (size 256): comm "swapper/0", pid 1, jiffies 4294892475 (age 33.128s) hex dump (first 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... ff ff ff ff ff ff ff ff 0c 0d 36 82 ff ff ff ff ..........6..... backtrace: [<ffffffff813adfc1>] kmemleak_alloc+0x21/0x50 [<ffffffff810e7b43>] __kmalloc+0x103/0x460 [<ffffffff810cdd81>] list_lru_init+0x21/0xb0 [<ffffffff810f36b5>] sget+0x305/0x670 [<ffffffff810f463a>] mount_bdev+0xba/0x1e0 [<ffffffff81175460>] ext4_mount+0x10/0x20 [<ffffffff810f4950>] mount_fs+0x10/0xc0 [<ffffffff81111c5a>] vfs_kern_mount+0x5a/0xf0 [<ffffffff811133ca>] do_mount+0x1da/0x9d0 [<ffffffff81113c3e>] SyS_mount+0x7e/0xc0 [<ffffffff8184c245>] mount_block_root+0x104/0x223 [<ffffffff8184c455>] mount_root+0xf1/0xfa [<ffffffff8184c58e>] prepare_namespace+0x130/0x168 [<ffffffff8184bff8>] kernel_init_freeable+0x185/0x192 [<ffffffff813ab7f9>] kernel_init+0x9/0x180 [<ffffffff813c963c>] ret_from_fork+0x7c/0xb0 unreferenced object 0xffff880002a6d980 (size 256): comm "swapper/0", pid 1, jiffies 4294892475 (age 33.128s) hex dump (first 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... ff ff ff ff ff ff ff ff 0c 0d 36 82 ff ff ff ff ..........6..... backtrace: [<ffffffff813adfc1>] kmemleak_alloc+0x21/0x50 [<ffffffff810e7b43>] __kmalloc+0x103/0x460 [<ffffffff810cdd81>] list_lru_init+0x21/0xb0 [<ffffffff810f36c9>] sget+0x319/0x670 [<ffffffff810f463a>] mount_bdev+0xba/0x1e0 [<ffffffff81175460>] ext4_mount+0x10/0x20 [<ffffffff810f4950>] mount_fs+0x10/0xc0 [<ffffffff81111c5a>] vfs_kern_mount+0x5a/0xf0 [<ffffffff811133ca>] do_mount+0x1da/0x9d0 [<ffffffff81113c3e>] SyS_mount+0x7e/0xc0 [<ffffffff8184c245>] mount_block_root+0x104/0x223 [<ffffffff8184c455>] mount_root+0xf1/0xfa [<ffffffff8184c58e>] prepare_namespace+0x130/0x168 [<ffffffff8184bff8>] kernel_init_freeable+0x185/0x192 [<ffffffff813ab7f9>] kernel_init+0x9/0x180 [<ffffffff813c963c>] ret_from_fork+0x7c/0xb0 unreferenced object 0xffff880002a7a7a0 (size 32): comm "swapper/0", pid 1, jiffies 4294892475 (age 33.128s) 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: [<ffffffff813adfc1>] kmemleak_alloc+0x21/0x50 [<ffffffff810e7b43>] __kmalloc+0x103/0x460 [<ffffffff810c091e>] register_shrinker+0x7e/0xa0 [<ffffffff810f394e>] sget+0x59e/0x670 [<ffffffff810f463a>] mount_bdev+0xba/0x1e0 [<ffffffff81175460>] ext4_mount+0x10/0x20 [<ffffffff810f4950>] mount_fs+0x10/0xc0 [<ffffffff81111c5a>] vfs_kern_mount+0x5a/0xf0 [<ffffffff811133ca>] do_mount+0x1da/0x9d0 [<ffffffff81113c3e>] SyS_mount+0x7e/0xc0 [<ffffffff8184c245>] mount_block_root+0x104/0x223 [<ffffffff8184c455>] mount_root+0xf1/0xfa [<ffffffff8184c58e>] prepare_namespace+0x130/0x168 [<ffffffff8184bff8>] kernel_init_freeable+0x185/0x192 [<ffffffff813ab7f9>] kernel_init+0x9/0x180 [<ffffffff813c963c>] ret_from_fork+0x7c/0xb0 unreferenced object 0xffff88000692b1c0 (size 256): comm "swapper/0", pid 1, jiffies 4294892648 (age 32.500s) hex dump (first 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... ff ff ff ff ff ff ff ff 0c 0d 36 82 ff ff ff ff ..........6..... backtrace: [<ffffffff813adfc1>] kmemleak_alloc+0x21/0x50 [<ffffffff810e7b43>] __kmalloc+0x103/0x460 [<ffffffff810cdd81>] list_lru_init+0x21/0xb0 [<ffffffff810f36b5>] sget+0x305/0x670 [<ffffffff810f463a>] mount_bdev+0xba/0x1e0 [<ffffffff81175460>] ext4_mount+0x10/0x20 [<ffffffff810f4950>] mount_fs+0x10/0xc0 [<ffffffff81111c5a>] vfs_kern_mount+0x5a/0xf0 [<ffffffff811133ca>] do_mount+0x1da/0x9d0 [<ffffffff81113c3e>] SyS_mount+0x7e/0xc0 [<ffffffff8184c245>] mount_block_root+0x104/0x223 [<ffffffff8184c455>] mount_root+0xf1/0xfa [<ffffffff8184c58e>] prepare_namespace+0x130/0x168 [<ffffffff8184bff8>] kernel_init_freeable+0x185/0x192 [<ffffffff813ab7f9>] kernel_init+0x9/0x180 [<ffffffff813c963c>] ret_from_fork+0x7c/0xb0 unreferenced object 0xffff88000692b2c0 (size 256): comm "swapper/0", pid 1, jiffies 4294892648 (age 32.500s) hex dump (first 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... ff ff ff ff ff ff ff ff 0c 0d 36 82 ff ff ff ff ..........6..... backtrace: [<ffffffff813adfc1>] kmemleak_alloc+0x21/0x50 [<ffffffff810e7b43>] __kmalloc+0x103/0x460 [<ffffffff810cdd81>] list_lru_init+0x21/0xb0 [<ffffffff810f36c9>] sget+0x319/0x670 [<ffffffff810f463a>] mount_bdev+0xba/0x1e0 [<ffffffff81175460>] ext4_mount+0x10/0x20 [<ffffffff810f4950>] mount_fs+0x10/0xc0 [<ffffffff81111c5a>] vfs_kern_mount+0x5a/0xf0 [<ffffffff811133ca>] do_mount+0x1da/0x9d0 [<ffffffff81113c3e>] SyS_mount+0x7e/0xc0 [<ffffffff8184c245>] mount_block_root+0x104/0x223 [<ffffffff8184c455>] mount_root+0xf1/0xfa [<ffffffff8184c58e>] prepare_namespace+0x130/0x168 [<ffffffff8184bff8>] kernel_init_freeable+0x185/0x192 [<ffffffff813ab7f9>] kernel_init+0x9/0x180 [<ffffffff813c963c>] ret_from_fork+0x7c/0xb0 unreferenced object 0xffff880006916780 (size 32): comm "swapper/0", pid 1, jiffies 4294892648 (age 32.500s) 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: [<ffffffff813adfc1>] kmemleak_alloc+0x21/0x50 [<ffffffff810e7b43>] __kmalloc+0x103/0x460 [<ffffffff810c091e>] register_shrinker+0x7e/0xa0 [<ffffffff810f394e>] sget+0x59e/0x670 [<ffffffff810f463a>] mount_bdev+0xba/0x1e0 [<ffffffff81175460>] ext4_mount+0x10/0x20 [<ffffffff810f4950>] mount_fs+0x10/0xc0 [<ffffffff81111c5a>] vfs_kern_mount+0x5a/0xf0 [<ffffffff811133ca>] do_mount+0x1da/0x9d0 [<ffffffff81113c3e>] SyS_mount+0x7e/0xc0 [<ffffffff8184c245>] mount_block_root+0x104/0x223 [<ffffffff8184c455>] mount_root+0xf1/0xfa [<ffffffff8184c58e>] prepare_namespace+0x130/0x168 [<ffffffff8184bff8>] kernel_init_freeable+0x185/0x192 [<ffffffff813ab7f9>] kernel_init+0x9/0x180 [<ffffffff813c963c>] ret_from_fork+0x7c/0xb0 #
On Tue, Jun 25, 2013 at 06:25:04PM +0000, bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=60121 > > Summary: -next and -mm: kmemleak reports 6 leaks in ext4_mount > paths > Product: File System > Version: 2.5 > Kernel Version: v3.10-rc6-684-g9dcc58c > Platform: All > OS/Version: Linux > Tree: -mm > Status: NEW > Severity: normal > Priority: P1 > Component: ext4 > AssignedTo: fs_ext4@kernel-bugs.osdl.org > ReportedBy: jmesmon@gmail.com > Regression: Yes > > > Created an attachment (id=106021) > --> (https://bugzilla.kernel.org/attachment.cgi?id=106021) > .config > > In next-20130624, next-20130625 and mmotm (v3.10-rc6-684-g9dcc58c), kmemleak > complains about some ext4_mount related allocations. Has nothing to do with ext4, and fixes are already on the way to -mm and -next. Thread here: http://marc.info/?l=linux-fsdevel&m=137154854120579&w=2 Cheers, Dave.