===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.3/4177 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.3/4177: #0: ffff88800f6aa3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801a1b6cb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f6ae950 (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: 4177 Comm: syz-executor.3 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: 0033:0x7f05cbf83427 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:00007ffe18675b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f05cbf83427 RDX: 00007ffe18675bf7 RSI: 00007f05cbfde019 RDI: 00007ffe18675be0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe186759b0 R10: 00007ffe18675867 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe18675be0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.3/4177 Modules linked in: CPU: 1 UID: 0 PID: 4177 Comm: syz-executor.3 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:ffff88801da7f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888019c8b700 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff888019c8bafc RBP: ffff888019c8b700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff888019c8b700 R13: 0000000000000001 R14: ffffffff85c0f9a0 R15: ffff88801a326bf0 FS: 00005555929be400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f05cc003543 CR3: 000000004bbb6000 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: 0033:0x7f05cbf83427 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:00007ffe18675b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f05cbf83427 RDX: 00007ffe18675bf7 RSI: 00007f05cbfde019 RDI: 00007ffe18675be0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe186759b0 R10: 00007ffe18675867 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe18675be0 irq event stamp: 179 hardirqs last enabled at (179): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (178): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (170): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (168): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs warning (device loop5): ext4_multi_mount_protect:393: Unable to create kmmpd thread for loop5. loop1: detected capacity change from 0 to 264192 loop7: detected capacity change from 0 to 6 FAT-fs (loop7): Directory bread(block 6) failed FAT-fs (loop7): error, corrupted directory (invalid entries) FAT-fs (loop7): Filesystem has been set read-only loop1: detected capacity change from 0 to 264192 loop5: detected capacity change from 0 to 512 EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: iget: bad i_size value: -8478842204872243200 EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed loop7: detected capacity change from 0 to 6 FAT-fs (loop7): Directory bread(block 6) failed FAT-fs (loop7): error, corrupted directory (invalid entries) FAT-fs (loop7): Filesystem has been set read-only loop5: detected capacity change from 0 to 512 FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): error, corrupted directory (invalid entries) EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: iget: bad i_size value: -8478842204872243200 FAT-fs (loop0): Filesystem has been set read-only EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed FAT-fs (loop7): Directory bread(block 6) failed FAT-fs (loop7): error, corrupted directory (invalid entries) FAT-fs (loop7): Filesystem has been set read-only FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): error, corrupted directory (invalid entries) FAT-fs (loop0): Filesystem has been set read-only FAT-fs (loop7): Directory bread(block 6) failed FAT-fs (loop7): error, corrupted directory (invalid entries) FAT-fs (loop7): Filesystem has been set read-only EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: iget: bad i_size value: -8478842204872243200 EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci2: command 0x0c1a tx timeout Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci0: command 0x0c1a tx timeout FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): error, corrupted directory (invalid entries) FAT-fs (loop0): Filesystem has been set read-only Bluetooth: hci6: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout audit: type=1400 audit(1768383660.169:12): avc: denied { write } for pid=4251 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 mac80211_hwsim hwsim9 wlan1: entered promiscuous mode mac80211_hwsim hwsim9 wlan1: left promiscuous mode tmpfs: Unknown parameter './file0/file0' sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 40 00 I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 32 prio class 2 UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. ieee80211 phy18: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. ieee80211 phy19: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. ieee80211 phy20: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. ieee80211 phy21: Selected rate control algorithm 'minstrel_ht' EXT4-fs warning (device sda): verify_group_input:158: Reserved blocks too high (65534) EXT4-fs warning (device sda): verify_group_input:158: Reserved blocks too high (65534) netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ieee80211 phy22: Selected rate control algorithm 'minstrel_ht' EXT4-fs warning (device sda): verify_group_input:158: Reserved blocks too high (65534) Bluetooth: hci2: command 0x0c1a tx timeout Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci0: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout EXT4-fs warning (device sda): verify_group_input:158: Reserved blocks too high (65534) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) EXT4-fs warning (device sda): verify_group_input:158: Reserved blocks too high (65534) sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 3 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci0: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci2: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout audit: type=1401 audit(1768383664.404:13): op=setxattr invalid_context="u:object_r:app_data_file:s0:c512,c768" audit: type=1401 audit(1768383664.406:14): op=setxattr invalid_context="u:object_r:app_data_file:s0:c512,c768" FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) vfat: Bad value for 'time_offset' vfat: Bad value for 'time_offset' set_capacity_and_notify: 9 callbacks suppressed loop2: detected capacity change from 0 to 512 EXT4-fs (loop2): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop2): group descriptors corrupted! audit: type=1326 audit(1768383665.348:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4698 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f05cbf83b19 code=0x0 audit: type=1326 audit(1768383666.181:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4698 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f05cbf83b19 code=0x0 mac80211_hwsim hwsim4 wlan1: entered promiscuous mode process 'syz-executor.7' launched './file1' with NULL argv: empty string added mac80211_hwsim hwsim4 wlan1: left promiscuous mode mac80211_hwsim hwsim4 wlan1: entered promiscuous mode mac80211_hwsim hwsim4 wlan1: left promiscuous mode loop6: detected capacity change from 0 to 64 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop6: detected capacity change from 0 to 64 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop3: detected capacity change from 0 to 64 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop6: detected capacity change from 0 to 64 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) netlink: 68 bytes leftover after parsing attributes in process `syz-executor.0'. ieee802154 phy0 wpan0: encryption failed: -22 loop6: detected capacity change from 0 to 64 loop3: detected capacity change from 0 to 64 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy0 wpan0: encryption failed: -22 netlink: 'syz-executor.6': attribute type 33 has an invalid length. netlink: 'syz-executor.6': attribute type 33 has an invalid length. audit: type=1400 audit(1768383668.797:17): avc: denied { module_load } for pid=4893 comm="syz-executor.3" path="/syz-executor.3" dev="sda" ino=15934 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=system permissive=1 Invalid ELF header type: 3 != 1 Invalid ELF header type: 3 != 1 Direct I/O collision with buffered writes! File: syzkaller-testdir018326642/syzkaller.I7JQkj/52/file0 Comm: syz-executor.6