Messages in this thread | | | Date | Mon, 13 Nov 2023 04:28:03 -0800 | Subject | Re: [syzbot] [btrfs?] memory leak in btrfs_ref_tree_mod | From | syzbot <> |
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Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue: memory leak in add_block_entry
BUG: memory leak unreferenced object 0xffff888122f9fe40 (size 64): comm "syz-executor.1", pid 5844, jiffies 4294945528 (age 11.970s) hex dump (first 32 bytes): 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81578015>] kmalloc_trace+0x25/0x90 mm/slab_common.c:1098 [<ffffffff821ae165>] kmalloc include/linux/slab.h:600 [inline] [<ffffffff821ae165>] kzalloc include/linux/slab.h:721 [inline] [<ffffffff821ae165>] add_block_entry+0x35/0x320 fs/btrfs/ref-verify.c:270 [<ffffffff821ae806>] add_tree_block+0x96/0x240 fs/btrfs/ref-verify.c:332 [<ffffffff821afdf6>] process_extent_item fs/btrfs/ref-verify.c:474 [inline] [<ffffffff821afdf6>] process_leaf fs/btrfs/ref-verify.c:524 [inline] [<ffffffff821afdf6>] walk_down_tree fs/btrfs/ref-verify.c:576 [inline] [<ffffffff821afdf6>] btrfs_build_ref_tree+0x566/0x8c0 fs/btrfs/ref-verify.c:1013 [<ffffffff82095365>] open_ctree+0x18c5/0x2370 fs/btrfs/disk-io.c:3523 [<ffffffff8205ab21>] btrfs_fill_super fs/btrfs/super.c:1117 [inline] [<ffffffff8205ab21>] btrfs_mount_root+0x5a1/0x750 fs/btrfs/super.c:1478 [<ffffffff816fd5a9>] legacy_get_tree+0x29/0x80 fs/fs_context.c:662 [<ffffffff81692d2a>] vfs_get_tree+0x2a/0x130 fs/super.c:1768 [<ffffffff816d06db>] fc_mount fs/namespace.c:1114 [inline] [<ffffffff816d06db>] vfs_kern_mount.part.0+0xcb/0x110 fs/namespace.c:1144 [<ffffffff816d075f>] vfs_kern_mount+0x3f/0x60 fs/namespace.c:1131 [<ffffffff8205eb82>] btrfs_mount+0x1e2/0x660 fs/btrfs/super.c:1538 [<ffffffff816fd5a9>] legacy_get_tree+0x29/0x80 fs/fs_context.c:662 [<ffffffff81692d2a>] vfs_get_tree+0x2a/0x130 fs/super.c:1768 [<ffffffff816d882f>] do_new_mount fs/namespace.c:3337 [inline] [<ffffffff816d882f>] path_mount+0xc8f/0x10d0 fs/namespace.c:3664 [<ffffffff816d9421>] do_mount fs/namespace.c:3677 [inline] [<ffffffff816d9421>] __do_sys_mount fs/namespace.c:3886 [inline] [<ffffffff816d9421>] __se_sys_mount fs/namespace.c:3863 [inline] [<ffffffff816d9421>] __x64_sys_mount+0x1a1/0x1f0 fs/namespace.c:3863 [<ffffffff84b4945f>] do_syscall_x64 arch/x86/entry/common.c:51 [inline] [<ffffffff84b4945f>] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
BUG: memory leak unreferenced object 0xffff8881216a7ba0 (size 96): comm "syz-executor.1", pid 5844, jiffies 4294945528 (age 11.970s) hex dump (first 32 bytes): 00 10 10 00 00 00 00 00 00 10 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 01 00 00 00 01 00 00 00 ................ backtrace: [<ffffffff81578015>] kmalloc_trace+0x25/0x90 mm/slab_common.c:1098 [<ffffffff821ae17e>] kmalloc include/linux/slab.h:600 [inline] [<ffffffff821ae17e>] kzalloc include/linux/slab.h:721 [inline] [<ffffffff821ae17e>] add_block_entry+0x4e/0x320 fs/btrfs/ref-verify.c:271 [<ffffffff821ae806>] add_tree_block+0x96/0x240 fs/btrfs/ref-verify.c:332 [<ffffffff821afdf6>] process_extent_item fs/btrfs/ref-verify.c:474 [inline] [<ffffffff821afdf6>] process_leaf fs/btrfs/ref-verify.c:524 [inline] [<ffffffff821afdf6>] walk_down_tree fs/btrfs/ref-verify.c:576 [inline] [<ffffffff821afdf6>] btrfs_build_ref_tree+0x566/0x8c0 fs/btrfs/ref-verify.c:1013 [<ffffffff82095365>] open_ctree+0x18c5/0x2370 fs/btrfs/disk-io.c:3523 [<ffffffff8205ab21>] btrfs_fill_super fs/btrfs/super.c:1117 [inline] [<ffffffff8205ab21>] btrfs_mount_root+0x5a1/0x750 fs/btrfs/super.c:1478 [<ffffffff816fd5a9>] legacy_get_tree+0x29/0x80 fs/fs_context.c:662 [<ffffffff81692d2a>] vfs_get_tree+0x2a/0x130 fs/super.c:1768 [<ffffffff816d06db>] fc_mount fs/namespace.c:1114 [inline] [<ffffffff816d06db>] vfs_kern_mount.part.0+0xcb/0x110 fs/namespace.c:1144 [<ffffffff816d075f>] vfs_kern_mount+0x3f/0x60 fs/namespace.c:1131 [<ffffffff8205eb82>] btrfs_mount+0x1e2/0x660 fs/btrfs/super.c:1538 [<ffffffff816fd5a9>] legacy_get_tree+0x29/0x80 fs/fs_context.c:662 [<ffffffff81692d2a>] vfs_get_tree+0x2a/0x130 fs/super.c:1768 [<ffffffff816d882f>] do_new_mount fs/namespace.c:3337 [inline] [<ffffffff816d882f>] path_mount+0xc8f/0x10d0 fs/namespace.c:3664 [<ffffffff816d9421>] do_mount fs/namespace.c:3677 [inline] [<ffffffff816d9421>] __do_sys_mount fs/namespace.c:3886 [inline] [<ffffffff816d9421>] __se_sys_mount fs/namespace.c:3863 [inline] [<ffffffff816d9421>] __x64_sys_mount+0x1a1/0x1f0 fs/namespace.c:3863 [<ffffffff84b4945f>] do_syscall_x64 arch/x86/entry/common.c:51 [inline] [<ffffffff84b4945f>] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
BUG: memory leak unreferenced object 0xffff888122f9fec0 (size 64): comm "syz-executor.1", pid 5844, jiffies 4294945528 (age 11.970s) hex dump (first 32 bytes): 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81578015>] kmalloc_trace+0x25/0x90 mm/slab_common.c:1098 [<ffffffff821ae165>] kmalloc include/linux/slab.h:600 [inline] [<ffffffff821ae165>] kzalloc include/linux/slab.h:721 [inline] [<ffffffff821ae165>] add_block_entry+0x35/0x320 fs/btrfs/ref-verify.c:270 [<ffffffff821ae806>] add_tree_block+0x96/0x240 fs/btrfs/ref-verify.c:332 [<ffffffff821afdf6>] process_extent_item fs/btrfs/ref-verify.c:474 [inline] [<ffffffff821afdf6>] process_leaf fs/btrfs/ref-verify.c:524 [inline] [<ffffffff821afdf6>] walk_down_tree fs/btrfs/ref-verify.c:576 [inline] [<ffffffff821afdf6>] btrfs_build_ref_tree+0x566/0x8c0 fs/btrfs/ref-verify.c:1013 [<ffffffff82095365>] open_ctree+0x18c5/0x2370 fs/btrfs/disk-io.c:3523 [<ffffffff8205ab21>] btrfs_fill_super fs/btrfs/super.c:1117 [inline] [<ffffffff8205ab21>] btrfs_mount_root+0x5a1/0x750 fs/btrfs/super.c:1478 [<ffffffff816fd5a9>] legacy_get_tree+0x29/0x80 fs/fs_context.c:662 [<ffffffff81692d2a>] vfs_get_tree+0x2a/0x130 fs/super.c:1768 [<ffffffff816d06db>] fc_mount fs/namespace.c:1114 [inline] [<ffffffff816d06db>] vfs_kern_mount.part.0+0xcb/0x110 fs/namespace.c:1144 [<ffffffff816d075f>] vfs_kern_mount+0x3f/0x60 fs/namespace.c:1131 [<ffffffff8205eb82>] btrfs_mount+0x1e2/0x660 fs/btrfs/super.c:1538 [<ffffffff816fd5a9>] legacy_get_tree+0x29/0x80 fs/fs_context.c:662 [<ffffffff81692d2a>] vfs_get_tree+0x2a/0x130 fs/super.c:1768 [<ffffffff816d882f>] do_new_mount fs/namespace.c:3337 [inline] [<ffffffff816d882f>] path_mount+0xc8f/0x10d0 fs/namespace.c:3664 [<ffffffff816d9421>] do_mount fs/namespace.c:3677 [inline] [<ffffffff816d9421>] __do_sys_mount fs/namespace.c:3886 [inline] [<ffffffff816d9421>] __se_sys_mount fs/namespace.c:3863 [inline] [<ffffffff816d9421>] __x64_sys_mount+0x1a1/0x1f0 fs/namespace.c:3863 [<ffffffff84b4945f>] do_syscall_x64 arch/x86/entry/common.c:51 [inline] [<ffffffff84b4945f>] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
Tested on:
commit: 5a6a09e9 Merge tag 'cgroup-for-6.7' of git://git.kerne.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=12ab8f5b680000 kernel config: https://syzkaller.appspot.com/x/.config?x=492c9379bc08e464 dashboard link: https://syzkaller.appspot.com/bug?extid=d66de4cbf532749df35f compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=17406848e80000
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