On Tue, Apr 28, 2020 at 09:56:59AM -0400, Qian Cai wrote: > > > > On Apr 28, 2020, at 4:57 AM, Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote: > >> net/ipv4/ipmr.c:136 RCU-list traversed in non-reader section!! > > https://lore.kernel.org/netdev/20200222063835.14328-2-frextrite@xxxxxxxxx/ > > Never been picked up for a few months due to some reasons. You could probably > need to convince David, Paul, Steven or Linus to unblock the bot or carry patches > on your own? > > >> net/ipv6/ip6mr.c:124 RCU-list traversed in non-reader section!! > > Not sure about this if anyone is working on it. Adding a few people... > > >> > >> other info that might help us debug this: > >> > >> > >> rcu_scheduler_active = 2, debug_locks = 1 > >> 1 lock held by swapper/0/1: > >> #0: ffffffff8a5a6330 (pernet_ops_rwsem){+.+.}-{3:3}, at: register_pernet_subsys+0x16/0x40 net/core/net_namespace.c:1257 > >> > >> stack backtrace: > >> CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.7.0-rc3-next-20200428-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+0x18f/0x20d lib/dump_stack.c:118 > >> ip6mr_get_table+0x153/0x180 net/ipv6/ip6mr.c:124 > >> ip6mr_new_table+0x1b/0x70 net/ipv6/ip6mr.c:382 > >> ip6mr_rules_init net/ipv6/ip6mr.c:236 [inline] > >> ip6mr_net_init+0x133/0x3f0 net/ipv6/ip6mr.c:1310 > >> ops_init+0xaf/0x420 net/core/net_namespace.c:151 > >> __register_pernet_operations net/core/net_namespace.c:1140 [inline] > >> register_pernet_operations+0x346/0x840 net/core/net_namespace.c:1217 > >> register_pernet_subsys+0x25/0x40 net/core/net_namespace.c:1258 > >> ip6_mr_init+0x49/0x152 net/ipv6/ip6mr.c:1363 > >> inet6_init+0x1d7/0x6dc net/ipv6/af_inet6.c:1032 > >> do_one_initcall+0x10a/0x7d0 init/main.c:1159 > >> do_initcall_level init/main.c:1232 [inline] > >> do_initcalls init/main.c:1248 [inline] > >> do_basic_setup init/main.c:1268 [inline] > >> kernel_init_freeable+0x501/0x5ae init/main.c:1454 > >> kernel_init+0xd/0x1bb init/main.c:1359 > >> ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 > >> > >> ============================= > >> WARNING: suspicious RCU usage > >> 5.7.0-rc3-next-20200428-syzkaller #0 Not tainted > >> ----------------------------- > >> security/integrity/evm/evm_main.c:231 RCU-list traversed in non-reader section!! > > Ditto. > > >> > >> other info that might help us debug this: > >> > >> > >> rcu_scheduler_active = 2, debug_locks = 1 > >> 2 locks held by systemd/1: > >> #0: ffff888098dfa450 (sb_writers#8){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1659 [inline] > >> #0: ffff888098dfa450 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:354 > >> #1: ffff8880988e8310 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] > >> #1: ffff8880988e8310 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: vfs_setxattr+0x92/0xf0 fs/xattr.c:219 > >> > >> stack backtrace: > >> CPU: 0 PID: 1 Comm: systemd Not tainted 5.7.0-rc3-next-20200428-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+0x18f/0x20d lib/dump_stack.c:118 > >> evm_protected_xattr+0x1c2/0x210 security/integrity/evm/evm_main.c:231 > >> evm_protect_xattr.isra.0+0xb6/0x3d0 security/integrity/evm/evm_main.c:318 > >> evm_inode_setxattr+0xc4/0xf0 security/integrity/evm/evm_main.c:387 > >> security_inode_setxattr+0x18f/0x200 security/security.c:1297 > >> vfs_setxattr+0xa7/0xf0 fs/xattr.c:220 > >> setxattr+0x23d/0x330 fs/xattr.c:451 > >> path_setxattr+0x170/0x190 fs/xattr.c:470 > >> __do_sys_setxattr fs/xattr.c:485 [inline] > >> __se_sys_setxattr fs/xattr.c:481 [inline] > >> __x64_sys_setxattr+0xc0/0x160 fs/xattr.c:481 > >> do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 > >> entry_SYSCALL_64_after_hwframe+0x49/0xb3 > >> RIP: 0033:0x7fe46005e67a > >> Code: 48 8b 0d 21 18 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 bc 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ee 17 2b 00 f7 d8 64 89 01 48 > >> RSP: 002b:00007fffef423568 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc > >> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe46005e67a > >> RDX: 00007fffef4235e0 RSI: 0000556ea53ddf9b RDI: 0000556ea6766760 > >> RBP: 0000556ea53ddf9b R08: 0000000000000000 R09: 0000000000000030 > >> R10: 0000000000000020 R11: 0000000000000246 R12: 00007fffef4235e0 > >> R13: 0000000000000020 R14: 0000000000000000 R15: 0000556ea6751700 > >> > >> security/device_cgroup.c:357 RCU-list traversed in non-reader section!! > > https://lore.kernel.org/lkml/20200406105950.GA2285@workstation-kernel-dev/ > > The same story. The patch had been ignored for a while. > Thank you for reminding! I will resend the patches and try to get them merged ASAP. > >
