============================= WARNING: suspicious RCU usage 4.14.307-syzkaller #0 Not tainted ----------------------------- net/sched/act_sample.c:95 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor.4/10864: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317 stack backtrace: CPU: 1 PID: 10864 Comm: syz-executor.4 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 tcf_sample_init+0x71c/0x8c0 net/sched/act_sample.c:95 tcf_action_init_1+0x51a/0x9e0 net/sched/act_api.c:691 tcf_action_init+0x26d/0x400 net/sched/act_api.c:760 tcf_action_add net/sched/act_api.c:1088 [inline] tc_ctl_action+0x2e3/0x510 net/sched/act_api.c:1140 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fe18b7620f9 RSP: 002b:00007fe189cd4168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe18b881f80 RCX: 00007fe18b7620f9 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 RBP: 00007fe18b7bdae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe67b11f2f R14: 00007fe189cd4300 R15: 0000000000022000 F2FS-fs (loop3): Found nat_bits in checkpoint F2FS-fs (loop3): Mounted with checkpoint version = 48b305e5 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. F2FS-fs (loop3): Found nat_bits in checkpoint F2FS-fs (loop3): Mounted with checkpoint version = 48b305e5 F2FS-fs (loop4): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop4): invalid crc value F2FS-fs (loop4): Found nat_bits in checkpoint f2fs_msg: 2 callbacks suppressed F2FS-fs (loop3): Mounted with checkpoint version = 48b305e5 F2FS-fs (loop4): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop4): invalid crc value F2FS-fs (loop4): Found nat_bits in checkpoint F2FS-fs (loop1): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop1): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop1): invalid crc value F2FS-fs (loop1): Found nat_bits in checkpoint F2FS-fs (loop4): Mounted with checkpoint version = 753bd00b ntfs: (device loop5): ntfs_is_extended_system_file(): Non-resident file name. You should run chkdsk. bridge0: port 3(bond0) entered blocking state bridge0: port 3(bond0) entered disabled state ntfs: (device loop5): ntfs_read_locked_inode(): $DATA attribute is missing. ntfs: (device loop5): ntfs_read_locked_inode(): Failed with error code -2. Marking corrupt inode 0x0 as bad. Run chkdsk. device bond0 entered promiscuous mode device bond_slave_0 entered promiscuous mode ntfs: (device loop5): ntfs_read_inode_mount(): ntfs_read_inode() of $MFT failed. BUG or corrupt $MFT. Run chkdsk and if no errors are found, please report you saw this message to linux-ntfs-dev@lists.sourceforge.net device bond_slave_1 entered promiscuous mode bridge0: port 3(bond0) entered blocking state bridge0: port 3(bond0) entered forwarding state ntfs: (device loop5): ntfs_is_extended_system_file(): Non-resident file name. You should run chkdsk. ntfs: (device loop5): ntfs_read_locked_inode(): $DATA attribute is missing. ntfs: (device loop5): ntfs_read_locked_inode(): Failed with error code -2. Marking corrupt inode 0x0 as bad. Run chkdsk. ntfs: (device loop5): ntfs_read_inode_mount(): ntfs_read_inode() of $MFT failed. BUG or corrupt $MFT. Run chkdsk and if no errors are found, please report you saw this message to linux-ntfs-dev@lists.sourceforge.net f2fs_msg: 29 callbacks suppressed F2FS-fs (loop4): Mounted with checkpoint version = 753bd00b F2FS-fs (loop1): Mounted with checkpoint version = 753bd00b F2FS-fs (loop3): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop3): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop3): invalid crc value F2FS-fs (loop3): Found nat_bits in checkpoint