Messages in this thread | | | Subject | Re: WARNING in __local_bh_enable_ip (2) | From | Eric Dumazet <> | Date | Wed, 14 Mar 2018 14:28:02 -0700 |
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On 03/14/2018 01:11 PM, syzbot wrote: > Hello, > > syzbot hit the following crash on net-next commit > be9fc0971a5c27b791608cf9705a04fe96dbd395 (Tue Mar 13 11:44:53 2018 +0000) > net: fix sysctl_fb_tunnels_only_for_init_net link error > > So far this crash happened 2 times on net-next. > Unfortunately, I don't have any reproducer for this crash yet. > Raw console output is attached. > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+c68e51bb5e699d3f8d91@syzkaller.appspotmail.com > It will help syzbot understand when the bug is fixed. See footer for > details. > If you forward the report, please keep this part and the footer. > > ------------[ cut here ]------------ > IRQs not enabled as expected > WARNING: CPU: 1 PID: 21587 at kernel/softirq.c:162 > __local_bh_enable_ip+0x1bb/0x230 kernel/softirq.c:162 > Kernel panic - not syncing: panic_on_warn set ... > > CPU: 1 PID: 21587 Comm: syz-executor6 Not tainted 4.16.0-rc4+ #264 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:17 [inline] > dump_stack+0x194/0x24d lib/dump_stack.c:53 > panic+0x1e4/0x41c kernel/panic.c:183 > __warn+0x1dc/0x200 kernel/panic.c:547 > syz-executor7: vmalloc: allocation failure: 17045651456 bytes, > mode:0x14080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null) > report_bug+0x211/0x2d0 lib/bug.c:184 > fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178 > fixup_bug arch/x86/kernel/traps.c:247 [inline] > do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 > syz-executor7 cpuset= > / > do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 > mems_allowed=0 > invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 > RIP: 0010:__local_bh_enable_ip+0x1bb/0x230 kernel/softirq.c:162 > RSP: 0018:ffff8801c95f71e0 EFLAGS: 00010082 > RAX: dffffc0000000008 RBX: 0000000000000201 RCX: ffffffff815abf2e > RDX: 00000000000037b0 RSI: ffffc900045ec000 RDI: 1ffff100392bedc1 > RBP: ffff8801c95f71f8 R08: 0000000000000000 R09: 1ffff100392bed93 > R10: ffff8801c95f70d8 R11: 0000000000000002 R12: ffffffff85638c44 > R13: ffff8801bb9fc080 R14: ffff8801c95f7290 R15: 1ffff100392bee4a > __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] > _raw_spin_unlock_bh+0x30/0x40 kernel/locking/spinlock.c:200 > spin_unlock_bh include/linux/spinlock.h:355 [inline] > rds_tcp_conn_free+0xa4/0x2d0 net/rds/tcp.c:281 > __rds_conn_create+0x148f/0x1b60 net/rds/connection.c:277 > rds_conn_create_outgoing+0x3f/0x50 net/rds/connection.c:309 > rds_sendmsg+0xe63/0x2590 net/rds/send.c:1156 > sock_sendmsg_nosec net/socket.c:629 [inline] > sock_sendmsg+0xca/0x110 net/socket.c:639 > ___sys_sendmsg+0x767/0x8b0 net/socket.c:2047 > __sys_sendmsg+0xe5/0x210 net/socket.c:2081 > SYSC_sendmsg net/socket.c:2092 [inline] > SyS_sendmsg+0x2d/0x50 net/socket.c:2088 > do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 > entry_SYSCALL_64_after_hwframe+0x42/0xb7 > RIP: 0033:0x453e69 > RSP: 002b:00007f102cbd0c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e > RAX: ffffffffffffffda RBX: 00007f102cbd16d4 RCX: 0000000000453e69 > RDX: 0000000000000000 RSI: 0000000020001580 RDI: 0000000000000014 > RBP: 000000000072bf58 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff > R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000001 > CPU: 0 PID: 21594 Comm: syz-executor7 Not tainted 4.16.0-rc4+ #264 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:17 [inline] > dump_stack+0x194/0x24d lib/dump_stack.c:53 > warn_alloc+0x19a/0x2b0 mm/page_alloc.c:3310 > __vmalloc_node_range+0x4f0/0x650 mm/vmalloc.c:1775 > __vmalloc_node mm/vmalloc.c:1804 [inline] > __vmalloc_node_flags_caller+0x50/0x60 mm/vmalloc.c:1826 > kvmalloc_node+0x82/0xd0 mm/util.c:428 > kvmalloc include/linux/mm.h:541 [inline] > kvmalloc_array include/linux/mm.h:557 [inline] > xt_alloc_entry_offsets+0x21/0x30 net/netfilter/x_tables.c:778 > translate_table+0x235/0x1690 net/ipv6/netfilter/ip6_tables.c:703 > do_replace net/ipv6/netfilter/ip6_tables.c:1164 [inline] > do_ip6t_set_ctl+0x370/0x5f0 net/ipv6/netfilter/ip6_tables.c:1690 > nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] > nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 > ipv6_setsockopt+0x10b/0x130 net/ipv6/ipv6_sockglue.c:927 > tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2878 > sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2980 > SYSC_setsockopt net/socket.c:1850 [inline] > SyS_setsockopt+0x189/0x360 net/socket.c:1829 > do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 > entry_SYSCALL_64_after_hwframe+0x42/0xb7 > RIP: 0033:0x453e69 > RSP: 002b:00007f0cd3439c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 > RAX: ffffffffffffffda RBX: 00007f0cd343a6d4 RCX: 0000000000453e69 > RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000014 > RBP: 000000000072bea0 R08: 0000000000000004 R09: 0000000000000000 > R10: 0000000020001fde R11: 0000000000000246 R12: 00000000ffffffff > R13: 0000000000000520 R14: 00000000006f7ba0 R15: 0000000000000000 > Dumping ftrace buffer: > (ftrace buffer empty) > Kernel Offset: disabled > Rebooting in 86400 seconds.. > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkaller@googlegroups.com. > > syzbot will keep track of this bug report. > If you forgot to add the Reported-by tag, once the fix for this bug is > merged > into any tree, please reply to this email with: > #syz fix: exact-commit-title > To mark this as a duplicate of another syzbot report, please reply with: > #syz dup: exact-subject-of-another-report > If it's a one-off invalid bug report, please reply with: > #syz invalid > Note: if the crash happens again, it will cause creation of a new bug > report. > Note: all commands must start from beginning of the line in the email body.
spin_lock_bh(&rds_tcp_conn_lock);/spin_unlock_bh(&rds_tcp_conn_lock); in rds_tcp_conn_free()
is in conflict with the spin_lock_irqsave(&rds_conn_lock, flags); in __rds_conn_create()
Hard to understand why RDS is messing with hard irqs really.
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