====================================================== WARNING: possible circular locking dependency detected 6.3.0-rc1-next-20230307 #1 Not tainted ------------------------------------------------------ syz-executor.2/9226 is trying to acquire lock: ffff88800fa363f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x238/0x4b0 but task is already holding lock: ffff88800b4fc990 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_set_acl+0x354/0x8c0 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&sb->s_type->i_mutex_key#6){++++}-{3:3}: down_read+0x3d/0x50 ext4_bmap+0x52/0x470 bmap+0xb0/0x130 jbd2_journal_bmap+0xac/0x1d0 jbd2_journal_flush+0x87f/0xc90 __ext4_ioctl+0x9fd/0x4330 __x64_sys_ioctl+0x19e/0x210 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc -> #0 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: __lock_acquire+0x2d56/0x6380 lock_acquire.part.0+0xea/0x320 mutex_lock_io_nested+0x149/0x1300 __jbd2_log_wait_for_space+0x238/0x4b0 add_transaction_credits+0xa42/0xb80 start_this_handle+0x3a6/0x14d0 jbd2__journal_start+0x394/0x6b0 __ext4_journal_start_sb+0x4c2/0x6f0 ext4_set_acl+0x26c/0x600 set_posix_acl+0x261/0x330 vfs_set_acl+0x5ba/0x8c0 do_set_acl+0xda/0x1c0 do_setxattr+0xc6/0x190 setxattr+0x14d/0x170 __x64_sys_fsetxattr+0x249/0x310 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sb->s_type->i_mutex_key#6); lock(&journal->j_checkpoint_mutex); lock(&sb->s_type->i_mutex_key#6); lock(&journal->j_checkpoint_mutex); *** DEADLOCK *** 2 locks held by syz-executor.2/9226: #0: ffff88800fa32438 (sb_writers#3){.+.+}-{0:0}, at: __x64_sys_fsetxattr+0x17a/0x310 #1: ffff88800b4fc990 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_set_acl+0x354/0x8c0 stack backtrace: CPU: 1 PID: 9226 Comm: syz-executor.2 Not tainted 6.3.0-rc1-next-20230307 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0x91/0xf0 check_noncircular+0x263/0x2e0 __lock_acquire+0x2d56/0x6380 lock_acquire.part.0+0xea/0x320 mutex_lock_io_nested+0x149/0x1300 __jbd2_log_wait_for_space+0x238/0x4b0 add_transaction_credits+0xa42/0xb80 start_this_handle+0x3a6/0x14d0 jbd2__journal_start+0x394/0x6b0 __ext4_journal_start_sb+0x4c2/0x6f0 ext4_set_acl+0x26c/0x600 set_posix_acl+0x261/0x330 vfs_set_acl+0x5ba/0x8c0 do_set_acl+0xda/0x1c0 do_setxattr+0xc6/0x190 setxattr+0x14d/0x170 __x64_sys_fsetxattr+0x249/0x310 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f986f1a9b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f986c6fe188 EFLAGS: 00000246 ORIG_RAX: 00000000000000be RAX: ffffffffffffffda RBX: 00007f986f2bd020 RCX: 00007f986f1a9b19 RDX: 0000000020000200 RSI: 0000000020000000 RDI: 0000000000000006 RBP: 00007f986f203f6d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000003c R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe5784f5ef R14: 00007f986c6fe300 R15: 0000000000022000 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 syz_tun: entered promiscuous mode syz_tun: left promiscuous mode syz_tun: entered promiscuous mode syz_tun: left promiscuous mode audit: type=1400 audit(1678189091.812:15): avc: denied { relabelto } for pid=9566 comm="syz-executor.1" name="file1" dev="sda" ino=16053 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1 audit: type=1400 audit(1678189091.856:16): avc: denied { setattr } for pid=9566 comm="syz-executor.1" name="file1" dev="sda" ino=16053 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1 audit: type=1400 audit(1678189091.907:17): avc: denied { read write } for pid=9566 comm="syz-executor.1" name="file1" dev="sda" ino=16053 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1 audit: type=1400 audit(1678189091.907:18): avc: denied { open } for pid=9566 comm="syz-executor.1" path="/syzkaller-testdir880305702/syzkaller.49L22N/235/file1" dev="sda" ino=16053 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1 audit: type=1400 audit(1678189092.228:19): avc: denied { relabelfrom } for pid=9566 comm="syz-executor.1" name="file1" dev="sda" ino=16053 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1 audit: type=1400 audit(1678189092.498:20): avc: denied { getattr } for pid=267 comm="syz-executor.1" path="/syzkaller-testdir880305702/syzkaller.49L22N/235/file1" dev="sda" ino=16053 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1 audit: type=1400 audit(1678189092.498:21): avc: denied { unlink } for pid=267 comm="syz-executor.1" name="file1" dev="sda" ino=16053 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1 syz_tun: entered promiscuous mode