bisecting cause commit starting from d5beb3140f91b1c8a3d41b14d729aefa4dcc58bc
building syzkaller on 1ab681a4bc3f87b09150fa23f9dd4e2c5f5c33cc
testing commit d5beb3140f91b1c8a3d41b14d729aefa4dcc58bc with gcc (GCC) 10.2.1 20210217
kernel signature: abdedd669e875595a2fb90c1ceed01f3517945ccf84663a9eef88db8b5743cd1
run #0: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #1: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #2: crashed: WARNING: locking bug in inet_autobind
run #3: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #4: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #5: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #6: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #7: crashed: WARNING: locking bug in inet_autobind
run #8: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #9: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #10: crashed: WARNING: locking bug in inet_autobind
run #11: crashed: WARNING: locking bug in inet_autobind
run #12: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #13: crashed: WARNING: locking bug in ip6_datagram_connect
run #14: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #15: crashed: WARNING: locking bug in ip6_datagram_connect
run #16: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #17: OK
run #18: OK
run #19: OK
testing release v5.9
testing commit bbf5c979011a099af5dc76498918ed7df445635b with gcc (GCC) 10.2.1 20210217
kernel signature: f02381bc8508f6f91f869ded65a62af42c0ba5cace52082998c54100c5066f8e
run #0: crashed: WARNING: locking bug in inet_autobind
run #1: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #2: crashed: WARNING: locking bug in inet_autobind
run #3: crashed: WARNING: locking bug in ip6_datagram_connect
run #4: crashed: WARNING: locking bug in ip6_datagram_connect
run #5: crashed: WARNING: locking bug in ip6_datagram_connect
run #6: crashed: WARNING: locking bug in ip6_datagram_connect
run #7: crashed: WARNING: locking bug in inet_autobind
run #8: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #9: OK
testing release v5.8
testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c with gcc (GCC) 8.4.1 20210217
kernel signature: 0429bd1d3713a76640a492e003590b050458668674de1694234bb410b138f3b5
run #0: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #1: crashed: WARNING: locking bug in ip6_datagram_connect
run #2: crashed: WARNING: locking bug in ip6_datagram_connect
run #3: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #4: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #5: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #6: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #7: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #8: crashed: WARNING: locking bug in inet_autobind
run #9: OK
testing release v5.7
testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 with gcc (GCC) 8.4.1 20210217
kernel signature: ff837d93373e7d4100e5b313e585055985ba6d479e41931fc6d3ce134866fa6e
run #0: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #1: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #2: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #3: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #4: crashed: WARNING: locking bug in ip6_datagram_connect
run #5: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #6: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #7: crashed: WARNING: locking bug in inet_autobind
run #8: OK
run #9: OK
testing release v5.6
testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 with gcc (GCC) 8.4.1 20210217
kernel signature: acdbb60baaf3fbdc7197757ff6b00e8fb61542b2da7ba1a2ccca58aff3d94b3f
run #0: crashed: WARNING: locking bug in ip6_datagram_connect
run #1: crashed: WARNING: locking bug in inet_autobind
run #2: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #3: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #4: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
testing release v5.5
testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 with gcc (GCC) 8.4.1 20210217
kernel signature: 0b8c1ebb20c123d31958511d1b3589bee69b7b343a68d6dd2a81af456f689194
run #0: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #1: crashed: WARNING: locking bug in inet_autobind
run #2: crashed: WARNING: locking bug in ip6_datagram_connect
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
reproducer seems to be flaky
testing release v5.4
testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.4.1 20210217
kernel signature: 5208de00feabab81097a906c69f88cafdff1fdc39589de0f15bae7e46a8a7371
run #0: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #1: crashed: WARNING: locking bug in ip6_datagram_connect
run #2: crashed: WARNING: locking bug in ip6_datagram_connect
run #3: crashed: WARNING: locking bug in ip6_datagram_connect
run #4: crashed: WARNING: locking bug in ip6_datagram_connect
run #5: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #6: crashed: WARNING: locking bug in ip6_datagram_connect
run #7: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #8: crashed: WARNING: locking bug in ip6_datagram_connect
run #9: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #10: crashed: WARNING: locking bug in ip6_datagram_connect
run #11: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #12: crashed: WARNING: locking bug in ip6_datagram_connect
run #13: crashed: WARNING: locking bug in inet_autobind
run #14: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #15: crashed: WARNING: locking bug in ip6_datagram_connect
run #16: crashed: WARNING: locking bug in selinux_netlbl_socket_connect
run #17: crashed: WARNING: locking bug in inet_autobind
run #18: OK
run #19: OK
testing release v5.3
testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.4.1 20210217
kernel signature: 8d963542b786e106a5937cd8e8a5b9d910b23c6d16a4a58a3759f822f39f397a
all runs: boot failed: BUG: spinlock bad magic in nf_connlabels_get
testing release v5.2
testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.4.1 20210217
kernel signature: c2ebabc80898388dbd46cff9d6876c7c4642a23adaad398c43696efbdcf9ca8a
all runs: boot failed: can't ssh into the instance
testing release v5.1
testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.4.1 20210217
kernel signature: 836dce2f3df9f95b400d080611edf23f0ace2070248e8382bda0da576d862b88
all runs: boot failed: can't ssh into the instance
testing release v5.0
testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.4.1 20210217
kernel signature: 31bcf510395e2bf93a99a06a4abc5f877c44a8971f2a9a7068cba12534b972be
all runs: boot failed: can't ssh into the instance
testing release v4.20
testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.4.1 20210217
kernel signature: 96b6d158ccc773db3e55b4a93c21325befe1d01fafca2c6ff8ccbecef5a0cc1a
all runs: boot failed: can't ssh into the instance
testing release v4.19
testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.4.1 20210217
kernel signature: 825a47b007b16006f7ed7a4bc2da6df910df554296535012ebb3195d7171ab2f
all runs: boot failed: can't ssh into the instance
testing release v4.18
testing commit 94710cac0ef4ee177a63b5227664b38c95bbf703 with gcc (GCC) 8.4.1 20210217
kernel signature: 793ea81863db3c2ad9177d2a4c32e56e6c1ac2794697aff54632549b8a8ef3b3
all runs: boot failed: can't ssh into the instance
testing release v4.17
testing commit 29dcea88779c856c7dc92040a0c01233263101d4 with gcc (GCC) 8.4.1 20210217
./security/selinux/include/classmap.h:247:2: error: #error New address family defined, please update secclass_map.
testing release v4.16
testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.4.1 20210217
./security/selinux/include/classmap.h:247:2: error: #error New address family defined, please update secclass_map.
orc_dump.c:106:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
orc_dump.c:111:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
elf.c:135:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:140:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
testing release v4.15
testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff with gcc (GCC) 8.4.1 20210217
orc_dump.c:106:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
orc_dump.c:111:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:36:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
elf.c:135:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:140:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
./security/selinux/include/classmap.h:247:2: error: #error New address family defined, please update secclass_map.
testing release v4.14
testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.4.1 20210217
orc_dump.c:105:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
orc_dump.c:110:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:36:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
elf.c:134:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:139:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
./security/selinux/include/classmap.h:245:2: error: #error New address family defined, please update secclass_map.
testing release v4.13
testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.4.1 20210217
pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
elf.c:144:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:149:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
./security/selinux/include/classmap.h:242:2: error: #error New address family defined, please update secclass_map.
testing release v4.12
testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.4.1 20210217
pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
elf.c:141:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:146:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
./security/selinux/include/classmap.h:238:2: error: #error New address family defined, please update secclass_map.
testing release v4.11
testing commit a351e9b9fc24e982ec2f0e76379a49826036da12 with gcc (GCC) 7.5.0
elf.c:141:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:146:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
testing release v4.10
testing commit c470abd4fde40ea6a0846a2beab642a578c0b8cd with gcc (GCC) 5.5.0
tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes]
pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
elf.c:129:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:134:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
testing release v4.9
testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0
tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes]
elf.c:129:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:134:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
testing release v4.8
testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0
tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes]
elf.c:129:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:134:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:33:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
testing release v4.7
testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0
tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes]
elf.c:122:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations]
elf.c:127:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations]
pager.c:33:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
testing release v4.6
testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0
tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes]
pager.c:33:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict]
Reproducer flagged being flaky
revisions tested: 14, total time: 3h40m41.102296542s (build: 1h16m16.293852233s, test: 2h20m38.229179238s)
the crash already happened on the oldest tested release
commit msg: Linux 5.4
crash: WARNING: locking bug in inet_autobind
------------[ cut here ]------------
WARNING: CPU: 1 PID: 21413 at kernel/locking/lockdep.c:841 look_up_lock_class kernel/locking/lockdep.c:840 [inline]
WARNING: CPU: 1 PID: 21413 at kernel/locking/lockdep.c:841 register_lock_class+0x299/0x16d0 kernel/locking/lockdep.c:1185
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 21413 Comm: syz-executor.5 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x96/0xe0 lib/dump_stack.c:118
 panic+0x2a1/0x52a kernel/panic.c:221
 __warn.cold.10+0x25/0x25 kernel/panic.c:582
 report_bug+0x1aa/0x260 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x12d/0x1e0 arch/x86/kernel/traps.c:272
 do_invalid_op+0x31/0x40 arch/x86/kernel/traps.c:291
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:840 [inline]
RIP: 0010:register_lock_class+0x299/0x16d0 kernel/locking/lockdep.c:1185
Code: 2d 38 da 0c 74 26 48 b8 00 00 00 00 00 fc ff df 48 89 ca 48 c1 ea 03 80 3c 02 00 0f 85 4a 0f 00 00 48 81 39 e0 15 81 8d 74 02 <0f> 0b 45 85 e4 0f 84 08 01 00 00 f6 04 24 01 0f 85 fe 00 00 00 41
RSP: 0018:ffff8880aa797a70 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: ffffffff8df68a80 RCX: ffff8880a5eb68a0
RDX: 1ffff11014bd6d14 RSI: ffffffff8928a940 RDI: ffff8880a5eb68b8
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: ffff888097836500 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff893f4460 R15: 1ffff110154f2f57
 __lock_acquire+0x105/0x4550 kernel/locking/lockdep.c:3837
 lock_acquire+0x12e/0x360 kernel/locking/lockdep.c:4487
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:343 [inline]
 lock_sock_nested+0x35/0xf0 net/core/sock.c:2938
 lock_sock include/net/sock.h:1527 [inline]
 inet_autobind+0xe/0x150 net/ipv4/af_inet.c:179
 inet_dgram_connect+0x1da/0x270 net/ipv4/af_inet.c:569
 __sys_connect+0x1ef/0x270 net/socket.c:1828
 __do_sys_connect net/socket.c:1839 [inline]
 __se_sys_connect net/socket.c:1836 [inline]
 __x64_sys_connect+0x6a/0xb0 net/socket.c:1836
 do_syscall_64+0x8e/0x4e0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465889
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe756a2c188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 000000000055bfa8 RCX: 0000000000465889
RDX: 000000000000001c RSI: 0000000020000080 RDI: 0000000000000005
RBP: 00000000004af68d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055bfa8
R13: 00007fffe6615e1f R14: 00007fe756a2c300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..