bridge2: port 1(bridge_slave_0) entered blocking state bridge2: port 1(bridge_slave_0) entered disabled state F2FS-fs (loop4): Found nat_bits in checkpoint device bridge_slave_0 entered promiscuous mode ====================================================== WARNING: possible circular locking dependency detected 4.19.165-syzkaller #0 Not tainted mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium ------------------------------------------------------ syz-executor.3/27688 is trying to acquire lock: 0000000029399654 (cpu_hotplug_lock.rw_sem){++++}, at: __static_key_slow_dec kernel/jump_label.c:212 [inline] 0000000029399654 (cpu_hotplug_lock.rw_sem){++++}, at: static_key_slow_dec+0x4f/0x90 kernel/jump_label.c:227 but task is already holding lock: 00000000ea5fb274 (&mm->mmap_sem){++++}, at: vm_mmap_pgoff+0x152/0x200 mm/util.c:355 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&mm->mmap_sem){++++}: perf_copy_attr+0xab/0x7a0 kernel/events/core.c:10251 _perf_ioctl+0x6aa/0x2300 kernel/events/core.c:5126 perf_ioctl+0x55/0x80 kernel/events/core.c:5153 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&cpuctx_mutex){+.+.}: perf_event_init_cpu+0xc4/0x170 kernel/events/core.c:11804 perf_event_init+0x309/0x34e kernel/events/core.c:11851 start_kernel+0x5b1/0x911 init/main.c:644 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #1 (pmus_lock){+.+.}: perf_event_init_cpu+0x2c/0x170 kernel/events/core.c:11798 cpuhp_invoke_callback+0x201/0x1b80 kernel/cpu.c:169 cpuhp_up_callbacks kernel/cpu.c:583 [inline] _cpu_up+0x257/0x510 kernel/cpu.c:1144 do_cpu_up+0xdd/0x1b0 kernel/cpu.c:1179 smp_init+0x1ed/0x202 kernel/smp.c:578 kernel_init_freeable+0x60c/0xa98 init/main.c:1138 kernel_init+0xd/0x1c0 init/main.c:1062 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 -> #0 (cpu_hotplug_lock.rw_sem){++++}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x3b/0xd0 kernel/cpu.c:289 __static_key_slow_dec kernel/jump_label.c:212 [inline] static_key_slow_dec+0x4f/0x90 kernel/jump_label.c:227 sw_perf_event_destroy+0x8a/0x120 kernel/events/core.c:8287 _free_event+0x32c/0x1150 kernel/events/core.c:4460 put_event kernel/events/core.c:4554 [inline] perf_mmap_close+0x6f6/0xea0 kernel/events/core.c:5558 remove_vma+0xa9/0x170 mm/mmap.c:176 remove_vma_list mm/mmap.c:2550 [inline] do_munmap+0x6f9/0xde0 mm/mmap.c:2786 mmap_region+0x2a3/0x16b0 mm/mmap.c:1700 do_mmap+0x8e8/0x1080 mm/mmap.c:1530 do_mmap_pgoff include/linux/mm.h:2326 [inline] vm_mmap_pgoff+0x197/0x200 mm/util.c:357 ksys_mmap_pgoff+0x298/0x5a0 mm/mmap.c:1580 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: cpu_hotplug_lock.rw_sem --> &cpuctx_mutex --> &mm->mmap_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_sem); lock(&cpuctx_mutex); lock(&mm->mmap_sem); lock(cpu_hotplug_lock.rw_sem); *** DEADLOCK *** 1 lock held by syz-executor.3/27688: #0: 00000000ea5fb274 (&mm->mmap_sem){++++}, at: vm_mmap_pgoff+0x152/0x200 mm/util.c:355 stack backtrace: CPU: 1 PID: 27688 Comm: syz-executor.3 Not tainted 4.19.165-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+0x1fc/0x2fe lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1865 [inline] check_prevs_add kernel/locking/lockdep.c:1978 [inline] validate_chain kernel/locking/lockdep.c:2419 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3415 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3907 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x3b/0xd0 kernel/cpu.c:289 __static_key_slow_dec kernel/jump_label.c:212 [inline] static_key_slow_dec+0x4f/0x90 kernel/jump_label.c:227 sw_perf_event_destroy+0x8a/0x120 kernel/events/core.c:8287 _free_event+0x32c/0x1150 kernel/events/core.c:4460 put_event kernel/events/core.c:4554 [inline] perf_mmap_close+0x6f6/0xea0 kernel/events/core.c:5558 remove_vma+0xa9/0x170 mm/mmap.c:176 remove_vma_list mm/mmap.c:2550 [inline] do_munmap+0x6f9/0xde0 mm/mmap.c:2786 mmap_region+0x2a3/0x16b0 mm/mmap.c:1700 do_mmap+0x8e8/0x1080 mm/mmap.c:1530 do_mmap_pgoff include/linux/mm.h:2326 [inline] vm_mmap_pgoff+0x197/0x200 mm/util.c:357 ksys_mmap_pgoff+0x298/0x5a0 mm/mmap.c:1580 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45e219 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7d8e888c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffd000 RBP: 000000000119c128 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000011 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007fff4839e90f R14: 00007f7d8e8899c0 R15: 000000000119c0dc IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. device bridge_slave_0 left promiscuous mode bridge2: port 1(bridge_slave_0) entered disabled state bridge3: port 1(bridge_slave_0) entered blocking state bridge3: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode IPVS: ftp: loaded support on port[0] = 21 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. device bridge_slave_0 left promiscuous mode bridge3: port 1(bridge_slave_0) entered disabled state bridge4: port 1(bridge_slave_0) entered blocking state bridge4: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode f2fs_msg: 86 callbacks suppressed F2FS-fs (loop0): sanity_check_inode: corrupted inode footer i_ino=3, ino,nid: [0, 3] run fsck to fix. F2FS-fs (loop0): Failed to read root inode F2FS-fs (loop4): inconsistent node block, nid:3, node_footer[nid:0,ino:0,ofs:0,cpver:0,blkaddr:0] F2FS-fs (loop4): Failed to read root inode F2FS-fs (loop4): invalid crc value F2FS-fs (loop4): Found nat_bits in checkpoint F2FS-fs (loop4): inconsistent node block, nid:3, node_footer[nid:0,ino:0,ofs:0,cpver:0,blkaddr:0] F2FS-fs (loop4): Failed to read root inode F2FS-fs (loop0): invalid crc value F2FS-fs (loop0): Found nat_bits in checkpoint netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. device bridge_slave_0 left promiscuous mode bridge4: port 1(bridge_slave_0) entered disabled state bridge5: port 1(bridge_slave_0) entered blocking state bridge5: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. device bridge_slave_0 left promiscuous mode bridge5: port 1(bridge_slave_0) entered disabled state bridge6: port 1(bridge_slave_0) entered blocking state bridge6: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. 9pnet: Insufficient options for proto=fd device bridge_slave_0 left promiscuous mode bridge6: port 1(bridge_slave_0) entered disabled state 9pnet: Insufficient options for proto=fd bridge7: port 1(bridge_slave_0) entered blocking state bridge7: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode 9pnet: Insufficient options for proto=fd netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. device bridge_slave_0 left promiscuous mode bridge7: port 1(bridge_slave_0) entered disabled state bridge8: port 1(bridge_slave_0) entered blocking state bridge8: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. device bridge_slave_0 left promiscuous mode bridge8: port 1(bridge_slave_0) entered disabled state bridge9: port 1(bridge_slave_0) entered blocking state bridge9: port 1(bridge_slave_0) entered disabled state f2fs_msg: 105 callbacks suppressed F2FS-fs (loop0): inconsistent node block, nid:3, node_footer[nid:0,ino:0,ofs:0,cpver:0,blkaddr:0] F2FS-fs (loop4): sanity_check_inode: corrupted inode footer i_ino=3, ino,nid: [0, 3] run fsck to fix. device bridge_slave_0 entered promiscuous mode F2FS-fs (loop0): Failed to read root inode F2FS-fs (loop4): Failed to read root inode F2FS-fs (loop0): invalid crc value F2FS-fs (loop0): Found nat_bits in checkpoint F2FS-fs (loop0): inconsistent node block, nid:3, node_footer[nid:0,ino:0,ofs:0,cpver:0,blkaddr:0] F2FS-fs (loop0): Failed to read root inode F2FS-fs (loop4): invalid crc value F2FS-fs (loop4): Found nat_bits in checkpoint 9pnet: Insufficient options for proto=fd