netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. ============================= 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: EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue rcu_scheduler_active = 2, debug_locks = 1 audit: type=1804 audit(1677380342.717:13): pid=10522 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir3340640859/syzkaller.5NxumL/29/file0/bus" dev="loop2" ino=18 res=1 1 lock held by syz-executor.4/10552: EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue #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: 0 PID: 10552 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: 0033:0x7fe023b390f9 RSP: 002b:00007fe0220ab168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe023c58f80 RCX: 00007fe023b390f9 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 RBP: 00007fe023b94ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdc5f8462f R14: 00007fe0220ab300 R15: 0000000000022000 audit: type=1804 audit(1677380342.807:14): pid=10519 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir3284331719/syzkaller.oY94Ah/24/file0/bus" dev="loop3" ino=18 res=1 audit: type=1804 audit(1677380342.807:15): pid=10519 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.3" name="/root/syzkaller-testdir3284331719/syzkaller.oY94Ah/24/file0/bus" dev="loop3" ino=18 res=1 audit: type=1804 audit(1677380343.227:16): pid=10522 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.2" name="/root/syzkaller-testdir3340640859/syzkaller.5NxumL/29/file0/bus" dev="loop2" ino=18 res=1 EXT4-fs error (device loop3): ext4_mb_generate_buddy:754: group 0, block bitmap and bg descriptor inconsistent: 25 vs 150994969 free clusters EXT4-fs (loop3): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 1 with error 28 EXT4-fs (loop3): This should not happen!! Data will be lost EXT4-fs (loop3): Total free blocks count 0 EXT4-fs (loop3): Free/Dirty block details EXT4-fs (loop3): free_blocks=2415919104 EXT4-fs (loop3): dirty_blocks=16 EXT4-fs (loop3): Block reservation details EXT4-fs (loop3): i_reserved_data_blocks=1 EXT4-fs error (device loop2): ext4_mb_generate_buddy:754: group 0, block bitmap and bg descriptor inconsistent: 25 vs 150994969 free clusters EXT4-fs (loop2): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 1 with error 28 EXT4-fs (loop2): This should not happen!! Data will be lost EXT4-fs (loop2): Total free blocks count 0 EXT4-fs (loop2): Free/Dirty block details EXT4-fs (loop2): free_blocks=2415919104 EXT4-fs (loop2): dirty_blocks=16 EXT4-fs (loop2): Block reservation details EXT4-fs (loop2): i_reserved_data_blocks=1 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. IPVS: ftp: loaded support on port[0] = 21 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue audit: type=1804 audit(1677380345.157:17): pid=10590 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir3284331719/syzkaller.oY94Ah/25/file0/bus" dev="loop3" ino=18 res=1 audit: type=1804 audit(1677380345.197:18): pid=10590 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.3" name="/root/syzkaller-testdir3284331719/syzkaller.oY94Ah/25/file0/bus" dev="loop3" ino=18 res=1 audit: type=1804 audit(1677380345.247:19): pid=10633 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir3340640859/syzkaller.5NxumL/30/file0/bus" dev="loop2" ino=18 res=1 audit: type=1804 audit(1677380345.317:20): pid=10633 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.2" name="/root/syzkaller-testdir3340640859/syzkaller.5NxumL/30/file0/bus" dev="loop2" ino=18 res=1 audit: type=1804 audit(1677380345.457:21): pid=10599 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir2625048072/syzkaller.xG9Jvi/36/file0/bus" dev="loop5" ino=18 res=1 audit: type=1804 audit(1677380345.507:22): pid=10599 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.5" name="/root/syzkaller-testdir2625048072/syzkaller.xG9Jvi/36/file0/bus" dev="loop5" ino=18 res=1 EXT4-fs error (device loop3): ext4_mb_generate_buddy:754: group 0, block bitmap and bg descriptor inconsistent: 25 vs 150994969 free clusters EXT4-fs (loop3): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 1 with error 28 EXT4-fs (loop3): This should not happen!! Data will be lost EXT4-fs (loop3): Total free blocks count 0 EXT4-fs (loop3): Free/Dirty block details EXT4-fs error (device loop2): ext4_mb_generate_buddy:754: group 0, block bitmap and bg descriptor inconsistent: 25 vs 150994969 free clusters EXT4-fs (loop3): free_blocks=2415919104 EXT4-fs (loop3): dirty_blocks=16 EXT4-fs (loop3): Block reservation details EXT4-fs (loop2): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 1 with error 28 EXT4-fs (loop3): i_reserved_data_blocks=1 EXT4-fs (loop2): This should not happen!! Data will be lost EXT4-fs (loop2): Total free blocks count 0 EXT4-fs (loop2): Free/Dirty block details EXT4-fs (loop2): free_blocks=2415919104 EXT4-fs (loop2): dirty_blocks=16 EXT4-fs error (device loop5): ext4_mb_generate_buddy:754: group 0, block bitmap and bg descriptor inconsistent: 25 vs 150994969 free clusters EXT4-fs (loop5): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 1 with error 28 EXT4-fs (loop2): Block reservation details EXT4-fs (loop2): i_reserved_data_blocks=1 EXT4-fs (loop5): This should not happen!! Data will be lost EXT4-fs (loop5): Total free blocks count 0 EXT4-fs (loop5): Free/Dirty block details EXT4-fs (loop5): free_blocks=2415919104 EXT4-fs (loop5): dirty_blocks=16 EXT4-fs (loop5): Block reservation details EXT4-fs (loop5): i_reserved_data_blocks=1 FAT-fs (loop3): error, invalid access to FAT (entry 0x0ffffff6) FAT-fs (loop3): Filesystem has been set read-only FAT-fs (loop3): error, invalid access to FAT (entry 0x0ffffff6) FAT-fs (loop3): Filesystem has been set read-only NILFS (loop1): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. FAT-fs (loop3): error, invalid access to FAT (entry 0x0ffffff6) FAT-fs (loop3): Filesystem has been set read-only NILFS (loop1): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds netlink: 64 bytes leftover after parsing attributes in process `syz-executor.4'. FAT-fs (loop3): error, invalid access to FAT (entry 0x0ffffff6) FAT-fs (loop3): Filesystem has been set read-only print_req_error: I/O error, dev loop3, sector 2 Buffer I/O error on dev loop3, logical block 2, async page read print_req_error: I/O error, dev loop3, sector 3 Buffer I/O error on dev loop3, logical block 3, async page read print_req_error: I/O error, dev loop3, sector 4 Buffer I/O error on dev loop3, logical block 4, async page read print_req_error: I/O error, dev loop3, sector 5 Buffer I/O error on dev loop3, logical block 5, async page read print_req_error: I/O error, dev loop3, sector 6 Buffer I/O error on dev loop3, logical block 6, async page read print_req_error: I/O error, dev loop3, sector 7 Buffer I/O error on dev loop3, logical block 7, async page read NILFS (loop1): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop1): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue UDF-fs: warning (device loop4): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop4): udf_process_sequence: Block 96 of volume descriptor sequence is corrupted or we could not read it UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) UDF-fs: warning (device loop4): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop4): udf_process_sequence: Block 96 of volume descriptor sequence is corrupted or we could not read it UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue UDF-fs: warning (device loop4): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop4): udf_process_sequence: Block 96 of volume descriptor sequence is corrupted or we could not read it UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue UDF-fs: warning (device loop4): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue UDF-fs: error (device loop4): udf_process_sequence: Block 96 of volume descriptor sequence is corrupted or we could not read it EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue