On Tue, Feb 27, 2018 at 1:23 PM, Davide Caratti <dcaratti@xxxxxxxxxx> wrote: > On Fri, 2018-02-23 at 07:59 -0800, syzbot wrote: >> Hello, >> >> syzbot hit the following crash on upstream commit >> af3e79d29555b97dd096e2f8e36a0f50213808a8 (Tue Feb 20 18:05:02 2018 +0000) >> Merge tag 'leds_for-4.16-rc3' of >> git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds >> >> So far this crash happened 27 times on >> https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/master, >> net-next, upstream. >> C reproducer is attached. >> syzkaller reproducer is attached. >> 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+3a0748c8f2f210c0ef9b@xxxxxxxxxxxxxxxxxxxxxxxxx >> 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. >> >> WARNING: CPU: 1 PID: 9921 at ./include/net/sock.h:638 sk_del_node_init >> include/net/sock.h:638 [inline] >> WARNING: CPU: 1 PID: 9921 at ./include/net/sock.h:638 >> smc_unhash_sk+0x335/0x450 net/smc/af_smc.c:90 >> Kernel panic - not syncing: panic_on_warn set ... >> >> CPU: 1 PID: 9921 Comm: syzkaller089677 Not tainted 4.16.0-rc2+ #324 >> 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 >> 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 >> do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 >> invalid_op+0x58/0x80 arch/x86/entry/entry_64.S:957 >> RIP: 0010:sk_del_node_init include/net/sock.h:638 [inline] >> RIP: 0010:smc_unhash_sk+0x335/0x450 net/smc/af_smc.c:90 >> RSP: 0018:ffff8801b639f198 EFLAGS: 00010293 >> RAX: ffff8801b684a340 RBX: 1ffff10036c73e37 RCX: ffffffff85a3f1f5 >> RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 1ffff10036c73e3b >> RBP: ffff8801b639f280 R08: dffffc0000000000 R09: 0000000000000004 >> R10: ffff8801b639f050 R11: 0000000000000004 R12: ffff8801b639f258 >> R13: ffffffff87669b40 R14: ffff8801c08d57c0 R15: 1ffff10036c73e3b >> smc_release+0x321/0x580 net/smc/af_smc.c:148 >> sock_release+0x8d/0x1e0 net/socket.c:595 >> sock_close+0x16/0x20 net/socket.c:1149 >> __fput+0x327/0x7e0 fs/file_table.c:209 >> ____fput+0x15/0x20 fs/file_table.c:243 >> task_work_run+0x199/0x270 kernel/task_work.c:113 >> exit_task_work include/linux/task_work.h:22 [inline] >> do_exit+0x9bb/0x1ad0 kernel/exit.c:865 >> do_group_exit+0x149/0x400 kernel/exit.c:968 >> get_signal+0x73a/0x16d0 kernel/signal.c:2469 >> do_signal+0x90/0x1e90 arch/x86/kernel/signal.c:809 >> exit_to_usermode_loop+0x258/0x2f0 arch/x86/entry/common.c:162 >> prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] >> syscall_return_slowpath arch/x86/entry/common.c:265 [inline] >> do_syscall_64+0x6e5/0x940 arch/x86/entry/common.c:292 >> entry_SYSCALL_64_after_hwframe+0x42/0xb7 >> RIP: 0033:0x44cad9 >> RSP: 002b:00007fbf24687ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000007 >> RAX: 0000000000000001 RBX: 0000000000700024 RCX: 000000000044cad9 >> RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000020000080 >> RBP: 0000000000700020 R08: 0000000000000000 R09: 0000000000000000 >> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 >> R13: 000000000080ef3f R14: 00007fbf246889c0 R15: 0000000000000005 >> Dumping ftrace buffer: >> (ftrace buffer empty) >> Kernel Offset: disabled >> Rebooting in 86400 seconds.. >> > > #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master Hi Davide, Any progress on this? This is syzbot top crasher at the moment with 86000+ machines crashed: https://syzkaller.appspot.com/bug?id=004b0f7b61d4901cbfecfc33de7996e8cbe0a278 -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
