loop0: detected capacity change from 0 to 264192 ====================================================== WARNING: possible circular locking dependency detected 5.19.0-next-20220810 #1 Not tainted ------------------------------------------------------ syz-executor.2/294 is trying to acquire lock: ffff88800fea83f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x234/0x460 but task is already holding lock: ffff88803b3497e0 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_unlink+0xd5/0x930 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+0x98/0x450 ext4_bmap+0x4e/0x470 bmap+0xac/0x120 jbd2_journal_bmap+0xa8/0x180 jbd2_journal_flush+0x853/0xc00 __ext4_ioctl+0x9e9/0x4090 __x64_sys_ioctl+0x19a/0x210 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: __lock_acquire+0x2a02/0x5e70 lock_acquire+0x1a2/0x530 mutex_lock_io_nested+0x148/0x1310 __jbd2_log_wait_for_space+0x234/0x460 add_transaction_credits+0xa42/0xb80 start_this_handle+0x3ac/0x14c0 jbd2__journal_start+0x390/0x8d0 __ext4_journal_start_sb+0x391/0x470 ext4_unlink+0x4e4/0x8b0 vfs_unlink+0x35a/0x930 do_unlinkat+0x3a9/0x630 __x64_sys_unlink+0xc6/0x110 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd 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 *** 3 locks held by syz-executor.2/294: #0: ffff88800fe9c438 (sb_writers#3){.+.+}-{0:0}, at: do_unlinkat+0x183/0x630 #1: ffff88803b33a1d0 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x270/0x630 #2: ffff88803b3497e0 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_unlink+0xd5/0x930 stack backtrace: CPU: 1 PID: 294 Comm: syz-executor.2 Not tainted 5.19.0-next-20220810 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack_lvl+0x8b/0xb3 check_noncircular+0x263/0x2e0 __lock_acquire+0x2a02/0x5e70 lock_acquire+0x1a2/0x530 mutex_lock_io_nested+0x148/0x1310 __jbd2_log_wait_for_space+0x234/0x460 add_transaction_credits+0xa42/0xb80 start_this_handle+0x3ac/0x14c0 jbd2__journal_start+0x390/0x8d0 __ext4_journal_start_sb+0x391/0x470 ext4_unlink+0x4e4/0x8b0 vfs_unlink+0x35a/0x930 do_unlinkat+0x3a9/0x630 __x64_sys_unlink+0xc6/0x110 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f294ecbd457 Code: 73 01 c3 48 c7 c1 bc ff ff ff 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 b8 57 00 00 00 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:00007ffe71f9ba98 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f294ecbd457 RDX: 00007ffe71f9bad0 RSI: 00007ffe71f9bad0 RDI: 00007ffe71f9bb60 RBP: 00007ffe71f9bb60 R08: 0000000000000001 R09: 00007ffe71f9b930 R10: 0000555557547c9b R11: 0000000000000206 R12: 00007f294ed17105 R13: 00007ffe71f9cc20 R14: 0000555557547c20 R15: 00007ffe71f9cc60 loop0: detected capacity change from 0 to 264192 SELinux: Context system_u:o is not valid (left unmapped). audit: type=1326 audit(1660129050.322:58): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=14609 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc4e420fb19 code=0x0 audit: type=1326 audit(1660129051.154:59): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=14609 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc4e420fb19 code=0x0 audit: type=1326 audit(1660129051.285:60): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=14654 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc4e420fb19 code=0x0 audit: type=1326 audit(1660129051.457:61): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=14674 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f7d5f98fb19 code=0x0 audit: type=1326 audit(1660129052.378:62): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=14711 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f7d5f98fb19 code=0x0 audit: type=1326 audit(1660129052.395:63): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=14710 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc4e420fb19 code=0x0 audit: type=1326 audit(1660129053.300:64): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=14730 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f7d5f98fb19 code=0x0 audit: type=1326 audit(1660129053.318:65): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=14729 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc4e420fb19 code=0x0 SELinux: security_context_str_to_sid (system_u) failed with errno=-22 SELinux: security_context_str_to_sid (system_u) failed with errno=-22 SELinux: security_context_str_to_sid (system_u) failed with errno=-22 SELinux: security_context_str_to_sid (system_u) failed with errno=-22 SELinux: security_context_str_to_sid (system_u) failed with errno=-22