Hello, syzbot found the following crash on: HEAD commit: f66ed1eb Merge tag 'iomap-5.7-fixes-1' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12cf3c4c100000 kernel config: https://syzkaller.appspot.com/x/.config?x=36dc1e5ad3e26c41 dashboard link: https://syzkaller.appspot.com/bug?extid=db84db800df5aa102826 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1269d24c100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16d01c4c100000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+db84db800df5aa102826@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: memory leak unreferenced object 0xffff888110ef1800 (size 1840): comm "syz-executor783", pid 8417, jiffies 4294954395 (age 25.940s) hex dump (first 32 bytes): 00 00 00 00 7f 00 00 06 15 14 f5 21 4e 20 22 dc ...........!N ". 0a 00 0b 40 00 00 00 00 00 00 00 00 00 00 00 00 ...@............ backtrace: [<000000007986323e>] sk_prot_alloc+0x3c/0x170 net/core/sock.c:1598 [<000000002fc61b2a>] sk_alloc+0x30/0x330 net/core/sock.c:1658 [<000000000d7242e5>] inet6_create net/ipv6/af_inet6.c:181 [inline] [<000000000d7242e5>] inet6_create+0x112/0x4d0 net/ipv6/af_inet6.c:108 [<00000000ca79ca9d>] __sock_create+0x14a/0x220 net/socket.c:1433 [<000000007253d628>] sock_create net/socket.c:1484 [inline] [<000000007253d628>] __sys_socket+0x60/0x110 net/socket.c:1526 [<00000000503be95b>] __do_sys_socket net/socket.c:1535 [inline] [<00000000503be95b>] __se_sys_socket net/socket.c:1533 [inline] [<00000000503be95b>] __x64_sys_socket+0x1a/0x20 net/socket.c:1533 [<0000000042ce79c0>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295 [<00000000b1aeae16>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff888110eaf620 (size 32): comm "syz-executor783", pid 8417, jiffies 4294954395 (age 25.940s) hex dump (first 32 bytes): 02 00 00 00 00 00 00 00 c0 d8 f0 10 81 88 ff ff ................ 01 00 00 00 03 00 00 00 33 00 00 00 00 00 00 00 ........3....... backtrace: [<000000000d2c6b3e>] kmalloc include/linux/slab.h:555 [inline] [<000000000d2c6b3e>] kzalloc include/linux/slab.h:669 [inline] [<000000000d2c6b3e>] selinux_sk_alloc_security+0x43/0xa0 security/selinux/hooks.c:5126 [<00000000d4591378>] security_sk_alloc+0x42/0x70 security/security.c:2120 [<000000009002ddd9>] sk_prot_alloc+0x9c/0x170 net/core/sock.c:1607 [<000000002fc61b2a>] sk_alloc+0x30/0x330 net/core/sock.c:1658 [<000000000d7242e5>] inet6_create net/ipv6/af_inet6.c:181 [inline] [<000000000d7242e5>] inet6_create+0x112/0x4d0 net/ipv6/af_inet6.c:108 [<00000000ca79ca9d>] __sock_create+0x14a/0x220 net/socket.c:1433 [<000000007253d628>] sock_create net/socket.c:1484 [inline] [<000000007253d628>] __sys_socket+0x60/0x110 net/socket.c:1526 [<00000000503be95b>] __do_sys_socket net/socket.c:1535 [inline] [<00000000503be95b>] __se_sys_socket net/socket.c:1533 [inline] [<00000000503be95b>] __x64_sys_socket+0x1a/0x20 net/socket.c:1533 [<0000000042ce79c0>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295 [<00000000b1aeae16>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff888110f0d8c0 (size 64): comm "syz-executor783", pid 8417, jiffies 4294954395 (age 25.940s) hex dump (first 32 bytes): 15 00 00 01 00 00 00 00 a0 39 dc 10 81 88 ff ff .........9...... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000002bb571e8>] kmalloc include/linux/slab.h:555 [inline] [<000000002bb571e8>] kzalloc include/linux/slab.h:669 [inline] [<000000002bb571e8>] netlbl_secattr_alloc include/net/netlabel.h:382 [inline] [<000000002bb571e8>] selinux_netlbl_sock_genattr+0x48/0x180 security/selinux/netlabel.c:76 [<00000000201274d5>] selinux_netlbl_socket_post_create+0x41/0xb0 security/selinux/netlabel.c:398 [<00000000189429bf>] selinux_socket_post_create+0x182/0x390 security/selinux/hooks.c:4541 [<0000000054916bb2>] security_socket_post_create+0x54/0x80 security/security.c:2032 [<0000000085ba4813>] __sock_create+0x1cc/0x220 net/socket.c:1449 [<000000007253d628>] sock_create net/socket.c:1484 [inline] [<000000007253d628>] __sys_socket+0x60/0x110 net/socket.c:1526 [<00000000503be95b>] __do_sys_socket net/socket.c:1535 [inline] [<00000000503be95b>] __se_sys_socket net/socket.c:1533 [inline] [<00000000503be95b>] __x64_sys_socket+0x1a/0x20 net/socket.c:1533 [<0000000042ce79c0>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295 [<00000000b1aeae16>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff888110dc39a0 (size 32): comm "syz-executor783", pid 8417, jiffies 4294954395 (age 25.940s) hex dump (first 32 bytes): 6b 65 72 6e 65 6c 5f 74 00 73 79 73 74 65 6d 5f kernel_t.system_ 72 3a 6b 65 72 6e 65 6c 5f 74 3a 73 30 00 00 00 r:kernel_t:s0... backtrace: [<0000000090b931e1>] kstrdup+0x36/0x70 mm/util.c:60 [<0000000079ad8987>] security_netlbl_sid_to_secattr+0x97/0x100 security/selinux/ss/services.c:3739 [<000000006911d3c9>] selinux_netlbl_sock_genattr+0x67/0x180 security/selinux/netlabel.c:79 [<00000000201274d5>] selinux_netlbl_socket_post_create+0x41/0xb0 security/selinux/netlabel.c:398 [<00000000189429bf>] selinux_socket_post_create+0x182/0x390 security/selinux/hooks.c:4541 [<0000000054916bb2>] security_socket_post_create+0x54/0x80 security/security.c:2032 [<0000000085ba4813>] __sock_create+0x1cc/0x220 net/socket.c:1449 [<000000007253d628>] sock_create net/socket.c:1484 [inline] [<000000007253d628>] __sys_socket+0x60/0x110 net/socket.c:1526 [<00000000503be95b>] __do_sys_socket net/socket.c:1535 [inline] [<00000000503be95b>] __se_sys_socket net/socket.c:1533 [inline] [<00000000503be95b>] __x64_sys_socket+0x1a/0x20 net/socket.c:1533 [<0000000042ce79c0>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295 [<00000000b1aeae16>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff888110ef1800 (size 1840): comm "syz-executor783", pid 8417, jiffies 4294954395 (age 30.410s) hex dump (first 32 bytes): 00 00 00 00 7f 00 00 06 15 14 f5 21 4e 20 22 dc ...........!N ". 0a 00 0b 40 00 00 00 00 00 00 00 00 00 00 00 00 ...@............ backtrace: [<000000007986323e>] sk_prot_alloc+0x3c/0x170 net/core/sock.c:1598 [<000000002fc61b2a>] sk_alloc+0x30/0x330 net/core/sock.c:1658 [<000000000d7242e5>] inet6_create net/ipv6/af_inet6.c:181 [inline] [<000000000d7242e5>] inet6_create+0x112/0x4d0 net/ipv6/af_inet6.c:108 [<00000000ca79ca9d>] __sock_create+0x14a/0x220 net/socket.c:1433 [<000000007253d628>] sock_create net/socket.c:1484 [inline] [<000000007253d628>] __sys_socket+0x60/0x110 net/socket.c:1526 [<00000000503be95b>] __do_sys_socket net/socket.c:1535 [inline] [<00000000503be95b>] __se_sys_socket net/socket.c:1533 [inline] [<00000000503be95b>] __x64_sys_socket+0x1a/0x20 net/socket.c:1533 [<0000000042ce79c0>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295 [<00000000b1aeae16>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff888110eaf620 (size 32): comm "syz-executor783", pid 8417, jiffies 4294954395 (age 30.410s) hex dump (first 32 bytes): 02 00 00 00 00 00 00 00 c0 d8 f0 10 81 88 ff ff ................ 01 00 00 00 03 00 00 00 33 00 00 00 00 00 00 00 ........3....... backtrace: [<000000000d2c6b3e>] kmalloc include/linux/slab.h:555 [inline] [<000000000d2c6b3e>] kzalloc include/linux/slab.h:669 [inline] [<000000000d2c6b3e>] selinux_sk_alloc_security+0x43/0xa0 security/selinux/hooks.c:5126 [<00000000d4591378>] security_sk_alloc+0x42/0x70 security/security.c:2120 [<000000009002ddd9>] sk_prot_alloc+0x9c/0x170 net/core/sock.c:1607 [<000000002fc61b2a>] sk_alloc+0x30/0x330 net/core/sock.c:1658 [<000000000d7242e5>] inet6_create net/ipv6/af_inet6.c:181 [inline] [<000000000d7242e5>] inet6_create+0x112/0x4d0 net/ipv6/af_inet6.c:108 [<00000000ca79ca9d>] __sock_create+0x14a/0x220 net/socket.c:1433 [<000000007253d628>] sock_create net/socket.c:1484 [inline] [<000000007253d628>] __sys_socket+0x60/0x110 net/socket.c:1526 [<00000000503be95b>] __do_sys_socket net/socket.c:1535 [inline] [<00000000503be95b>] __se_sys_socket net/socket.c:1533 [inline] [<00000000503be95b>] __x64_sys_socket+0x1a/0x20 net/socket.c:1533 [<0000000042ce79c0>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295 [<00000000b1aeae16>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff888110f0d8c0 (size 64): comm "syz-executor783", pid 8417, jiffies 4294954395 (age 30.410s) hex dump (first 32 bytes): 15 00 00 01 00 00 00 00 a0 39 dc 10 81 88 ff ff .........9...... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000002bb571e8>] kmalloc include/linux/slab.h:555 [inline] [<000000002bb571e8>] kzalloc include/linux/slab.h:669 [inline] [<000000002bb571e8>] netlbl_secattr_alloc include/net/netlabel.h:382 [inline] [<000000002bb571e8>] selinux_netlbl_sock_genattr+0x48/0x180 security/selinux/netlabel.c:76 [<00000000201274d5>] selinux_netlbl_socket_post_create+0x41/0xb0 security/selinux/netlabel.c:398 [<00000000189429bf>] selinux_socket_post_create+0x182/0x390 security/selinux/hooks.c:4541 [<0000000054916bb2>] security_socket_post_create+0x54/0x80 security/security.c:2032 [<0000000085ba4813>] __sock_create+0x1cc/0x220 net/socket.c:1449 [<000000007253d628>] sock_create net/socket.c:1484 [inline] [<000000007253d628>] __sys_socket+0x60/0x110 net/socket.c:1526 [<00000000503be95b>] __do_sys_socket net/socket.c:1535 [inline] [<00000000503be95b>] __se_sys_socket net/socket.c:1533 [inline] [<00000000503be95b>] __x64_sys_socket+0x1a/0x20 net/socket.c:1533 [<0000000042ce79c0>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295 [<00000000b1aeae16>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff888110dc39a0 (size 32): comm "syz-executor783", pid 8417, jiffies 4294954395 (age 30.410s) hex dump (first 32 bytes): 6b 65 72 6e 65 6c 5f 74 00 73 79 73 74 65 6d 5f kernel_t.system_ 72 3a 6b 65 72 6e 65 6c 5f 74 3a 73 30 00 00 00 r:kernel_t:s0... backtrace: [<0000000090b931e1>] kstrdup+0x36/0x70 mm/util.c:60 [<0000000079ad8987>] security_netlbl_sid_to_secattr+0x97/0x100 security/selinux/ss/services.c:3739 [<000000006911d3c9>] selinux_netlbl_sock_genattr+0x67/0x180 security/selinux/netlabel.c:79 [<00000000201274d5>] selinux_netlbl_socket_post_create+0x41/0xb0 security/selinux/netlabel.c:398 [<00000000189429bf>] selinux_socket_post_create+0x182/0x390 security/selinux/hooks.c:4541 [<0000000054916bb2>] security_socket_post_create+0x54/0x80 security/security.c:2032 [<0000000085ba4813>] __sock_create+0x1cc/0x220 net/socket.c:1449 [<000000007253d628>] sock_create net/socket.c:1484 [inline] [<000000007253d628>] __sys_socket+0x60/0x110 net/socket.c:1526 [<00000000503be95b>] __do_sys_socket net/socket.c:1535 [inline] [<00000000503be95b>] __se_sys_socket net/socket.c:1533 [inline] [<00000000503be95b>] __x64_sys_socket+0x1a/0x20 net/socket.c:1533 [<0000000042ce79c0>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295 [<00000000b1aeae16>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
