===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.4/4728 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.4/4728: #0: ffff88800a83e3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888045ee7640 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fb3a950 (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: 0 UID: 0 PID: 4728 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260113 #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+0x406/0xb40 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: 0033:0x7fbf9f3a9427 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:00007ffc8264b3b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbf9f3a9427 RDX: 00007ffc8264b493 RSI: 00007fbf9f404022 RDI: 00007ffc8264b480 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc8264b250 R10: 00007ffc8264b107 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc8264b480 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.4/4728 Modules linked in: CPU: 0 UID: 0 PID: 4728 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260113 #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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff88800f8579a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b361b80 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801b361f7c RBP: ffff88801b361b80 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801b361b80 R13: 0000000000000001 R14: ffffffff85c0e0f0 R15: ffff888045e345d0 FS: 000055556d6f1400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdcbabac543 CR3: 000000000de28000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x406/0xb40 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: 0033:0x7fbf9f3a9427 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:00007ffc8264b3b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbf9f3a9427 RDX: 00007ffc8264b493 RSI: 00007fbf9f404022 RDI: 00007ffc8264b480 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc8264b250 R10: 00007ffc8264b107 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc8264b480 irq event stamp: 339 hardirqs last enabled at (339): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (338): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (334): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (332): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. loop6: detected capacity change from 0 to 608 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. loop6: detected capacity change from 0 to 608 loop6: detected capacity change from 0 to 608 loop6: detected capacity change from 0 to 608 loop4: detected capacity change from 0 to 2097151 loop6: detected capacity change from 0 to 6 FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): error, fat_get_cluster: invalid start cluster (i_pos 0, start 0000007b) FAT-fs (loop6): Filesystem has been set read-only loop4: detected capacity change from 0 to 2097151 sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. loop6: detected capacity change from 0 to 6 FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): error, fat_get_cluster: invalid start cluster (i_pos 0, start 0000007b) FAT-fs (loop6): Filesystem has been set read-only loop6: detected capacity change from 0 to 6 FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): error, fat_get_cluster: invalid start cluster (i_pos 0, start 0000007b) FAT-fs (loop6): Filesystem has been set read-only loop6: detected capacity change from 0 to 6 FAT-fs (loop6): Directory bread(block 6) failed loop4: detected capacity change from 0 to 2097151 FAT-fs (loop6): error, fat_get_cluster: invalid start cluster (i_pos 0, start 0000007b) FAT-fs (loop6): Filesystem has been set read-only loop7: detected capacity change from 0 to 368 netlink: 4368 bytes leftover after parsing attributes in process `syz-executor.0'. audit: type=1400 audit(1768293570.758:16): avc: denied { relabelto } for pid=5208 comm="syz-executor.1" name="file0" dev="sda" ino=15990 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:zero_device_t:s0 tclass=dir permissive=1 audit: type=1400 audit(1768293570.760:17): avc: denied { read } for pid=5208 comm="syz-executor.1" name="file0" dev="sda" ino=15990 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:zero_device_t:s0 tclass=dir permissive=1 netlink: 4368 bytes leftover after parsing attributes in process `syz-executor.0'. audit: type=1400 audit(1768293570.760:18): avc: denied { open } for pid=5208 comm="syz-executor.1" path="/syzkaller-testdir288873795/syzkaller.uMYdqV/78/file0" dev="sda" ino=15990 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:zero_device_t:s0 tclass=dir permissive=1 audit: type=1400 audit(1768293570.768:19): avc: denied { add_name search } for pid=5208 comm="syz-executor.1" name="file0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:zero_device_t:s0 tclass=dir permissive=1 audit: type=1400 audit(1768293570.768:20): avc: denied { create } for pid=5208 comm="syz-executor.1" name="file0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:zero_device_t:s0 tclass=dir permissive=1 audit: type=1400 audit(1768293570.792:21): avc: denied { relabelfrom } for pid=5208 comm="syz-executor.1" name="file0" dev="sda" ino=15990 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:zero_device_t:s0 tclass=dir permissive=1 audit: type=1400 audit(1768293570.793:22): avc: denied { read } for pid=5208 comm="syz-executor.1" name="file0" dev="sda" ino=15990 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:zero_device_t:s0 tclass=dir permissive=1 audit: type=1400 audit(1768293570.824:23): avc: denied { getattr } for pid=281 comm="syz-executor.1" path="/syzkaller-testdir288873795/syzkaller.uMYdqV/78/file0" dev="sda" ino=15990 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:zero_device_t:s0 tclass=dir permissive=1 audit: type=1400 audit(1768293570.824:24): avc: denied { remove_name } for pid=281 comm="syz-executor.1" name="file0" dev="sda" ino=16004 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:zero_device_t:s0 tclass=dir permissive=1 audit: type=1400 audit(1768293570.824:25): avc: denied { rmdir } for pid=281 comm="syz-executor.1" name="file0" dev="sda" ino=16004 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:zero_device_t:s0 tclass=dir permissive=1 netlink: 4368 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 4368 bytes leftover after parsing attributes in process `syz-executor.0'. Bluetooth: hci1: Opcode 0x0c1a failed: -4 Bluetooth: hci1: Error when powering off device on rfkill (-4) Bluetooth: hci0: Opcode 0x0c1a failed: -4 Bluetooth: hci0: Error when powering off device on rfkill (-4) Bluetooth: hci2: Opcode 0x0c1a failed: -4 Bluetooth: hci2: Error when powering off device on rfkill (-4) Bluetooth: hci3: Opcode 0x0c1a failed: -4 Bluetooth: hci3: Error when powering off device on rfkill (-4) Bluetooth: hci4: Opcode 0x0c1a failed: -4 Bluetooth: hci4: Error when powering off device on rfkill (-4) Bluetooth: hci5: Opcode 0x0c1a failed: -4 Bluetooth: hci5: Error when powering off device on rfkill (-4) Bluetooth: hci6: Opcode 0x0c1a failed: -4 Bluetooth: hci6: Error when powering off device on rfkill (-4) Bluetooth: hci7: Opcode 0x0c1a failed: -4 Bluetooth: hci7: Error when powering off device on rfkill (-4) loop7: detected capacity change from 0 to 6 FAT-fs (loop7): Directory bread(block 6) failed loop7: detected capacity change from 0 to 6 FAT-fs (loop7): Directory bread(block 6) failed loop7: detected capacity change from 0 to 6 FAT-fs (loop7): Directory bread(block 6) failed faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption syz-executor.7 (5399) used greatest stack depth: 22840 bytes left faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. loop5: detected capacity change from 0 to 63 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 63 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 63 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 63 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ieee802154 phy0 wpan0: encryption failed: -22 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ieee802154 phy0 wpan0: encryption failed: -22 9pnet_fd: p9_fd_create_tcp (5708): problem connecting socket to 127.0.0.1 9pnet_fd: p9_fd_create_tcp (5708): problem connecting socket to 127.0.0.1 ieee802154 phy0 wpan0: encryption failed: -22 9pnet_fd: p9_fd_create_tcp (5722): problem connecting socket to 127.0.0.1