Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
memory leak in rxrpc_lookup_local
BUG: memory leak
unreferenced object 0xffff88810ae30400 (size 256):
comm "syz-executor.2", pid 8878, jiffies 4294943959 (age 433.730s)
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 0a 00 00 00 00 40 75 17 81 88 ff ff .........@u.....
backtrace:
[<00000000d78976b4>] kmalloc include/linux/slab.h:552 [inline]
[<00000000d78976b4>] kzalloc include/linux/slab.h:664 [inline]
[<00000000d78976b4>] rxrpc_alloc_local net/rxrpc/local_object.c:79 [inline]
[<00000000d78976b4>] rxrpc_lookup_local+0x1c1/0x760 net/rxrpc/local_object.c:244
[<000000000f4771f3>] rxrpc_bind+0x174/0x240 net/rxrpc/af_rxrpc.c:149
[<00000000a1ca3956>] afs_open_socket+0xdb/0x200 fs/afs/rxrpc.c:64
[<000000000b4e3083>] afs_net_init+0x2b4/0x340 fs/afs/main.c:126
[<0000000057174e11>] ops_init+0x4e/0x190 net/core/net_namespace.c:152
[<000000001ef2d4d2>] setup_net+0xdb/0x2d0 net/core/net_namespace.c:342
[<000000000c0943a9>] copy_net_ns+0x14b/0x320 net/core/net_namespace.c:483
[<000000000134587c>] create_new_namespaces+0x199/0x4e0 kernel/nsproxy.c:110
[<00000000ab7ab634>] unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:231
[<000000000a7b8a55>] ksys_unshare+0x2fe/0x5c0 kernel/fork.c:2949
[<000000007378cba1>] __do_sys_unshare kernel/fork.c:3017 [inline]
[<000000007378cba1>] __se_sys_unshare kernel/fork.c:3015 [inline]
[<000000007378cba1>] __x64_sys_unshare+0x12/0x20 kernel/fork.c:3015
[<000000002e47b3c4>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000daddea42>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff888117639d00 (size 256):
comm "syz-executor.0", pid 8872, jiffies 4294943961 (age 433.710s)
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 0a 00 00 00 00 40 7a 17 81 88 ff ff .........@z.....
backtrace:
[<00000000d78976b4>] kmalloc include/linux/slab.h:552 [inline]
[<00000000d78976b4>] kzalloc include/linux/slab.h:664 [inline]
[<00000000d78976b4>] rxrpc_alloc_local net/rxrpc/local_object.c:79 [inline]
[<00000000d78976b4>] rxrpc_lookup_local+0x1c1/0x760 net/rxrpc/local_object.c:244
[<000000000f4771f3>] rxrpc_bind+0x174/0x240 net/rxrpc/af_rxrpc.c:149
[<00000000a1ca3956>] afs_open_socket+0xdb/0x200 fs/afs/rxrpc.c:64
[<000000000b4e3083>] afs_net_init+0x2b4/0x340 fs/afs/main.c:126
[<0000000057174e11>] ops_init+0x4e/0x190 net/core/net_namespace.c:152
[<000000001ef2d4d2>] setup_net+0xdb/0x2d0 net/core/net_namespace.c:342
[<000000000c0943a9>] copy_net_ns+0x14b/0x320 net/core/net_namespace.c:483
[<000000000134587c>] create_new_namespaces+0x199/0x4e0 kernel/nsproxy.c:110
[<00000000ab7ab634>] unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:231
[<000000000a7b8a55>] ksys_unshare+0x2fe/0x5c0 kernel/fork.c:2949
[<000000007378cba1>] __do_sys_unshare kernel/fork.c:3017 [inline]
[<000000007378cba1>] __se_sys_unshare kernel/fork.c:3015 [inline]
[<000000007378cba1>] __x64_sys_unshare+0x12/0x20 kernel/fork.c:3015
[<000000002e47b3c4>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000daddea42>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff888117a9cb00 (size 256):
comm "syz-executor.7", pid 8882, jiffies 4294943964 (age 433.680s)
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 0a 00 00 00 00 80 8b 17 81 88 ff ff ................
backtrace:
[<00000000d78976b4>] kmalloc include/linux/slab.h:552 [inline]
[<00000000d78976b4>] kzalloc include/linux/slab.h:664 [inline]
[<00000000d78976b4>] rxrpc_alloc_local net/rxrpc/local_object.c:79 [inline]
[<00000000d78976b4>] rxrpc_lookup_local+0x1c1/0x760 net/rxrpc/local_object.c:244
[<000000000f4771f3>] rxrpc_bind+0x174/0x240 net/rxrpc/af_rxrpc.c:149
[<00000000a1ca3956>] afs_open_socket+0xdb/0x200 fs/afs/rxrpc.c:64
[<000000000b4e3083>] afs_net_init+0x2b4/0x340 fs/afs/main.c:126
[<0000000057174e11>] ops_init+0x4e/0x190 net/core/net_namespace.c:152
[<000000001ef2d4d2>] setup_net+0xdb/0x2d0 net/core/net_namespace.c:342
[<000000000c0943a9>] copy_net_ns+0x14b/0x320 net/core/net_namespace.c:483
[<000000000134587c>] create_new_namespaces+0x199/0x4e0 kernel/nsproxy.c:110
[<00000000ab7ab634>] unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:231
[<000000000a7b8a55>] ksys_unshare+0x2fe/0x5c0 kernel/fork.c:2949
[<000000007378cba1>] __do_sys_unshare kernel/fork.c:3017 [inline]
[<000000007378cba1>] __se_sys_unshare kernel/fork.c:3015 [inline]
[<000000007378cba1>] __x64_sys_unshare+0x12/0x20 kernel/fork.c:3015
[<000000002e47b3c4>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000daddea42>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88810c9b9700 (size 256):
comm "syz-executor.5", pid 8881, jiffies 4294943965 (age 433.670s)
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 0a 00 00 00 00 c0 b4 0c 81 88 ff ff ................
backtrace:
[<00000000d78976b4>] kmalloc include/linux/slab.h:552 [inline]
[<00000000d78976b4>] kzalloc include/linux/slab.h:664 [inline]
[<00000000d78976b4>] rxrpc_alloc_local net/rxrpc/local_object.c:79 [inline]
[<00000000d78976b4>] rxrpc_lookup_local+0x1c1/0x760 net/rxrpc/local_object.c:244
[<000000000f4771f3>] rxrpc_bind+0x174/0x240 net/rxrpc/af_rxrpc.c:149
[<00000000a1ca3956>] afs_open_socket+0xdb/0x200 fs/afs/rxrpc.c:64
[<000000000b4e3083>] afs_net_init+0x2b4/0x340 fs/afs/main.c:126
[<0000000057174e11>] ops_init+0x4e/0x190 net/core/net_namespace.c:152
[<000000001ef2d4d2>] setup_net+0xdb/0x2d0 net/core/net_namespace.c:342
[<000000000c0943a9>] copy_net_ns+0x14b/0x320 net/core/net_namespace.c:483
[<000000000134587c>] create_new_namespaces+0x199/0x4e0 kernel/nsproxy.c:110
[<00000000ab7ab634>] unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:231
[<000000000a7b8a55>] ksys_unshare+0x2fe/0x5c0 kernel/fork.c:2949
[<000000007378cba1>] __do_sys_unshare kernel/fork.c:3017 [inline]
[<000000007378cba1>] __se_sys_unshare kernel/fork.c:3015 [inline]
[<000000007378cba1>] __x64_sys_unshare+0x12/0x20 kernel/fork.c:3015
[<000000002e47b3c4>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
[<00000000daddea42>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
Tested on:
commit: 4d02da97 Merge tag 'net-5.10-rc5' of git://git.kernel.org/..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=16754c55500000
kernel config: https://syzkaller.appspot.com/x/.config?x=9e70f46496e4daad
dashboard link: https://syzkaller.appspot.com/bug?extid=44e64397bd81d5e84cba
compiler: gcc (GCC) 10.1.0-syz 20200507
patch: https://syzkaller.appspot.com/x/patch.diff?x=12ca5c73500000
