====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.3.292/5728 is trying to acquire lock: ffff888071addbe0 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_read_virt_blocks+0x265/0x950 fs/ocfs2/extent_map.c:984 but task is already holding lock: ffff8880777b8990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f29/0x2150 fs/jbd2/transaction.c:463 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (jbd2_handle){++++}-{0:0}: start_this_handle+0x1f49/0x2150 fs/jbd2/transaction.c:463 jbd2__journal_start+0x2b7/0x5a0 fs/jbd2/transaction.c:520 jbd2_journal_start+0x26/0x30 fs/jbd2/transaction.c:559 ocfs2_start_trans+0x372/0x6c0 fs/ocfs2/journal.c:376 ocfs2_mknod+0xe6a/0x2350 fs/ocfs2/namei.c:361 ocfs2_create+0x1b6/0x4a0 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3490 [inline] open_last_lookups fs/namei.c:3558 [inline] path_openat+0x1187/0x2e70 fs/namei.c:3788 do_filp_open+0x1c1/0x3c0 fs/namei.c:3818 do_sys_openat2+0x142/0x490 fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_open fs/open.c:1344 [inline] __se_sys_open fs/open.c:1340 [inline] __x64_sys_open+0x11b/0x140 fs/open.c:1340 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x366/0x6c0 fs/ocfs2/journal.c:374 ocfs2_mknod+0xe6a/0x2350 fs/ocfs2/namei.c:361 ocfs2_create+0x1b6/0x4a0 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3490 [inline] open_last_lookups fs/namei.c:3558 [inline] path_openat+0x1187/0x2e70 fs/namei.c:3788 do_filp_open+0x1c1/0x3c0 fs/namei.c:3818 do_sys_openat2+0x142/0x490 fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_open fs/open.c:1344 [inline] __se_sys_open fs/open.c:1340 [inline] __x64_sys_open+0x11b/0x140 fs/open.c:1340 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (sb_internal#6){.+.+}-{0:0}: __lock_release kernel/locking/lockdep.c:5376 [inline] lock_release+0x340/0x910 kernel/locking/lockdep.c:5682 up_write+0x29/0x420 kernel/locking/rwsem.c:1625 inode_unlock include/linux/fs.h:763 [inline] ocfs2_free_ac_resource fs/ocfs2/suballoc.c:126 [inline] ocfs2_free_alloc_context+0x93/0x1a0 fs/ocfs2/suballoc.c:140 ocfs2_write_begin_nolock+0x41ea/0x4270 fs/ocfs2/aops.c:1825 ocfs2_dio_wr_get_block+0xb6d/0x17a0 fs/ocfs2/aops.c:2239 get_more_blocks fs/direct-io.c:659 [inline] do_direct_IO fs/direct-io.c:947 [inline] __blockdev_direct_IO+0x16a9/0x3450 fs/direct-io.c:1260 ocfs2_direct_IO+0x23e/0x2b0 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x10f/0x330 mm/filemap.c:3787 __generic_file_write_iter+0x15f/0x2a0 mm/filemap.c:3945 ocfs2_file_write_iter+0x1593/0x1df0 fs/ocfs2/file.c:2469 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x62d/0xaf0 fs/read_write.c:861 vfs_writev fs/read_write.c:934 [inline] do_pwritev+0x201/0x340 fs/read_write.c:1031 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&oi->ip_alloc_sem){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x265/0x950 fs/ocfs2/extent_map.c:984 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x3d1/0x20c0 fs/ocfs2/dir.c:1091 ocfs2_rename+0x1e13/0x3820 fs/ocfs2/namei.c:1568 vfs_rename+0xbbf/0x10d0 fs/namei.c:4882 do_renameat2+0x89d/0xc70 fs/namei.c:5035 __do_sys_rename fs/namei.c:5081 [inline] __se_sys_rename fs/namei.c:5079 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5079 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: &oi->ip_alloc_sem --> &journal->j_trans_barrier --> jbd2_handle Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(jbd2_handle); lock(&journal->j_trans_barrier); lock(jbd2_handle); lock(&oi->ip_alloc_sem); *** DEADLOCK *** 8 locks held by syz.3.292/5728: #0: ffff8880788d6460 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:402 #1: ffff8880788d6748 (&type->s_vfs_rename_key){+.+.}-{3:3}, at: lock_rename fs/namei.c:3046 [inline] #1: ffff8880788d6748 (&type->s_vfs_rename_key){+.+.}-{3:3}, at: do_renameat2+0x35b/0xc70 fs/namei.c:4974 #2: ffff8880557c2648 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #2: ffff8880557c2648 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: lock_two_directories fs/namei.c:-1 [inline] #2: ffff8880557c2648 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3047 [inline] #2: ffff8880557c2648 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: do_renameat2+0x3ed/0xc70 fs/namei.c:4974 #3: ffff888071addf48 (&sb->s_type->i_mutex_key#27/5){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline] #3: ffff888071addf48 (&sb->s_type->i_mutex_key#27/5){+.+.}-{3:3}, at: do_renameat2+0x423/0xc70 fs/namei.c:4974 #4: ffff888071aded88 (&sb->s_type->i_mutex_key#27/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #4: ffff888071aded88 (&sb->s_type->i_mutex_key#27/2){+.+.}-{3:3}, at: vfs_rename+0x78c/0x10d0 fs/namei.c:4845 #5: ffff8880788d6650 (sb_internal#6){.+.+}-{0:0}, at: ocfs2_rename+0x1a0a/0x3820 fs/ocfs2/namei.c:1488 #6: ffff888059d748e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x366/0x6c0 fs/ocfs2/journal.c:374 #7: ffff8880777b8990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f29/0x2150 fs/jbd2/transaction.c:463 stack backtrace: CPU: 0 PID: 5728 Comm: syz.3.292 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106 check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x265/0x950 fs/ocfs2/extent_map.c:984 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x3d1/0x20c0 fs/ocfs2/dir.c:1091 ocfs2_rename+0x1e13/0x3820 fs/ocfs2/namei.c:1568 vfs_rename+0xbbf/0x10d0 fs/namei.c:4882 do_renameat2+0x89d/0xc70 fs/namei.c:5035 __do_sys_rename fs/namei.c:5081 [inline] __se_sys_rename fs/namei.c:5079 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5079 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f0ba838f749 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0ba91a0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007f0ba85e6180 RCX: 00007f0ba838f749 RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000200000000000 RBP: 00007f0ba8413f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0ba85e6218 R14: 00007f0ba85e6180 R15: 00007fff0e027358