BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor.4/3632
caller is __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:62
CPU: 0 PID: 3632 Comm: syz-executor.4 Not tainted 4.4.174+ #17
 0000000000000000 08d71d321af31aca ffff8800bb9c76f8 ffffffff81aad1a1
 ffff8800b281df00 0000000000000000 ffffffff82a861e0 ffffffff8292c040
 0000000000000002 ffff8800bb9c7738 ffffffff81b0ad83 ffff8800b414d680
Call Trace:
 [<ffffffff81aad1a1>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81aad1a1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff81b0ad83>] check_preemption_disabled+0x1d3/0x200 lib/smp_processor_id.c:46
 [<ffffffff81b0aded>] __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:62
 [<ffffffff8240fcf5>] tcp_try_coalesce net/ipv4/tcp_input.c:4293 [inline]
 [<ffffffff8240fcf5>] tcp_try_coalesce+0x245/0x510 net/ipv4/tcp_input.c:4275
 [<ffffffff824100e7>] tcp_queue_rcv+0x127/0x6f0 net/ipv4/tcp_input.c:4539
 [<ffffffff8242494e>] tcp_send_rcvq+0x3de/0x4a0 net/ipv4/tcp_input.c:4585
 [<ffffffff823fd062>] tcp_sendmsg+0x2332/0x2ab0 net/ipv4/tcp.c:1134
 [<ffffffff824a8b42>] inet_sendmsg+0x202/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff821d838e>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff821d838e>] sock_sendmsg+0xbe/0x110 net/socket.c:648
 [<ffffffff821da269>] ___sys_sendmsg+0x769/0x890 net/socket.c:1975
 [<ffffffff821dd0c5>] __sys_sendmsg+0xc5/0x160 net/socket.c:2009
 [<ffffffff822acdda>] C_SYSC_sendmsg net/compat.c:725 [inline]
 [<ffffffff822acdda>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:723
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff8271a350>] sysenter_flags_fixed+0xd/0x1a
capability: warning: `syz-executor.0' uses deprecated v2 capabilities in a way that may be insecure
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket
EXT4-fs error (device sda1): mb_free_blocks:1466: group 7, inode 16549: block 229408:freeing already freed block (bit 32); block bitmap corrupt.
EXT4-fs error (device sda1): ext4_mb_generate_buddy:756: group 7, block bitmap and bg descriptor inconsistent: 12033 vs 12043 free clusters
EXT4-fs (sda1): pa ffff8800b8434d80: logic 0, phys. 229408, len 32
EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3814: group 7, free 25, pa_free 15