===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.1/4020 is trying to release lock (rcu_read_lock) at: [] __wait_on_freeing_inode+0x105/0x350 but there are no more locks to release! other info that might help us debug this: 4 locks held by syz-executor.1/4020: #0: ffff88800f8583f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888044d8ecb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f85c950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe32/0x12d0 #3: ffffffff85c16898 (inode_hash_lock){+.+.}-{3:3}, at: insert_inode_locked+0xf9/0x890 stack backtrace: CPU: 1 UID: 0 PID: 4020 Comm: syz-executor.1 Not tainted 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xca/0x120 print_unlock_imbalance_bug+0x118/0x130 lock_release+0x1ee/0x270 __wait_on_freeing_inode+0x10a/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe7c268f427 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 58 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:00007ffc30aa0be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe7c268f427 RDX: 00007ffc30aa0cc3 RSI: 00007fe7c26ea02f RDI: 00007ffc30aa0cb0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc30aa0a80 R10: 00007ffc30aa0937 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc30aa0cb0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.1/4020 Modules linked in: CPU: 1 UID: 0 PID: 4020 Comm: syz-executor.1 Not tainted 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__rcu_read_unlock+0x25f/0x5c0 Code: f2 02 00 00 c7 43 58 01 00 00 00 bf 09 00 00 00 e8 16 c0 de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 8a 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 81 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff8880522b79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888050085280 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88805008567c RBP: ffff888050085280 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff888050085280 R13: 0000000000000001 R14: ffffffff85c11160 R15: ffff888044d3a938 FS: 0000555576e03400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe7c270f541 CR3: 000000004f180000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe7c268f427 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 58 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:00007ffc30aa0be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe7c268f427 RDX: 00007ffc30aa0cc3 RSI: 00007fe7c26ea02f RDI: 00007ffc30aa0cb0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc30aa0a80 R10: 00007ffc30aa0937 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc30aa0cb0 irq event stamp: 437 hardirqs last enabled at (437): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (436): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (430): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (428): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs error (device loop7): __ext4_fill_super:5560: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed EXT4-fs error (device loop0): __ext4_fill_super:5560: inode #2: comm syz-executor.0: iget: special inode unallocated EXT4-fs (loop0): get root inode failed EXT4-fs (loop0): mount failed EXT4-fs error (device loop4): __ext4_fill_super:5560: inode #2: comm syz-executor.4: iget: special inode unallocated EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed EXT4-fs error (device loop1): __ext4_fill_super:5560: inode #2: comm syz-executor.1: iget: special inode unallocated EXT4-fs error (device loop2): __ext4_fill_super:5560: inode #2: comm syz-executor.2: iget: special inode unallocated EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: iget: special inode unallocated EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed EXT4-fs error (device loop3): __ext4_fill_super:5560: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed EXT4-fs error (device loop3): __ext4_fill_super:5560: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs error (device loop2): __ext4_fill_super:5560: inode #2: comm syz-executor.2: iget: special inode unallocated EXT4-fs (loop3): mount failed EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed EXT4-fs error (device loop4): __ext4_fill_super:5560: inode #2: comm syz-executor.4: iget: special inode unallocated EXT4-fs error (device loop1): __ext4_fill_super:5560: inode #2: comm syz-executor.1: iget: special inode unallocated EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed EXT4-fs error (device loop0): __ext4_fill_super:5560: inode #2: comm syz-executor.0: iget: special inode unallocated EXT4-fs (loop0): get root inode failed EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed EXT4-fs (loop0): mount failed EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: iget: special inode unallocated EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: iget: special inode unallocated EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium ISO 9660 Extensions: Microsoft Joliet Level 0 ISO 9660 Extensions: Microsoft Joliet Level 0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=4207 comm=syz-executor.5 set_capacity_and_notify: 17 callbacks suppressed loop1: detected capacity change from 0 to 136 ISO 9660 Extensions: Microsoft Joliet Level 0 UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list loop1: detected capacity change from 0 to 136 ISO 9660 Extensions: Microsoft Joliet Level 0 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. EXT4-fs warning (device sda): ext4_dirblock_csum_verify:375: inode #2046: comm syz-executor.2: No space for directory leaf checksum. Please run e2fsck -D. EXT4-fs error (device sda): __ext4_find_entry:1624: inode #2046: comm syz-executor.2: checksumming directory block 0 EXT4-fs warning (device sda): ext4_dirblock_csum_verify:375: inode #2046: comm syz-executor.2: No space for directory leaf checksum. Please run e2fsck -D. EXT4-fs error (device sda): __ext4_find_entry:1624: inode #2046: comm syz-executor.2: checksumming directory block 0 EXT4-fs warning (device sda): ext4_dirblock_csum_verify:375: inode #2046: comm syz-executor.2: No space for directory leaf checksum. Please run e2fsck -D. EXT4-fs error (device sda): __ext4_find_entry:1624: inode #2046: comm syz-executor.2: checksumming directory block 0 EXT4-fs warning (device sda): ext4_dirblock_csum_verify:375: inode #2046: comm syz-executor.2: No space for directory leaf checksum. Please run e2fsck -D. EXT4-fs error (device sda): __ext4_find_entry:1624: inode #2046: comm syz-executor.2: checksumming directory block 0 EXT4-fs warning (device sda): ext4_dirblock_csum_verify:375: inode #2046: comm syz-executor.1: No space for directory leaf checksum. Please run e2fsck -D. EXT4-fs error (device sda): __ext4_find_entry:1624: inode #2046: comm syz-executor.1: checksumming directory block 0 EXT4-fs warning (device sda): ext4_dirblock_csum_verify:375: inode #2046: comm syz-executor.2: No space for directory leaf checksum. Please run e2fsck -D. EXT4-fs error (device sda): __ext4_find_entry:1624: inode #2046: comm syz-executor.2: checksumming directory block 0 EXT4-fs warning (device sda): ext4_dirblock_csum_verify:375: inode #2046: comm syz-executor.1: No space for directory leaf checksum. Please run e2fsck -D. EXT4-fs error (device sda): __ext4_find_entry:1624: inode #2046: comm syz-executor.1: checksumming directory block 0 UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list EXT4-fs warning (device sda): ext4_dirblock_csum_verify:375: inode #2046: comm syz-executor.1: No space for directory leaf checksum. Please run e2fsck -D. EXT4-fs error (device sda): __ext4_find_entry:1624: inode #2046: comm syz-executor.1: checksumming directory block 0 netlink: 52 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 52 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 52 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 52 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 52 bytes leftover after parsing attributes in process `syz-executor.6'. syz-executor.5 (4623) used greatest stack depth: 23808 bytes left loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 180