===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.4/7160 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.4/7160: #0: ffff88800f5283f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801f84e330 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f52c950 (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: 7160 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: 0033:0x7f413d05b427 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:00007ffc9dd7ace8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f413d05b427 RDX: ffffffffffffffbc RSI: 00007f413d0b600e RDI: 00007f413d0b51dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc9dd7a760 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc9dd7adb0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.4/7160 Modules linked in: CPU: 1 UID: 0 PID: 7160 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:ffff8880333879a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888046fc8000 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff888046fc83fc RBP: ffff888046fc8000 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888046fc8000 R13: 0000000000000001 R14: ffffffff85c0c6b0 R15: ffff88801fac7578 FS: 0000555590943400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f413d0db544 CR3: 0000000033357000 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: 0033:0x7f413d05b427 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:00007ffc9dd7ace8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f413d05b427 RDX: ffffffffffffffbc RSI: 00007f413d0b600e RDI: 00007f413d0b51dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc9dd7a760 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc9dd7adb0 irq event stamp: 605 hardirqs last enabled at (605): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (604): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (600): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (598): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- Bluetooth: hci7: command 0x0c1a tx timeout Bluetooth: hci4: Opcode 0x0c03 failed: -110 Bluetooth: hci3: Opcode 0x0c03 failed: -110 Bluetooth: hci1: Opcode 0x0c03 failed: -110 capability: warning: `syz-executor.2' uses deprecated v2 capabilities in a way that may be insecure netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. Bluetooth: hci7: command 0x0c1a tx timeout audit: type=1400 audit(1768297673.993:15): avc: denied { watch_reads } for pid=7410 comm="syz-executor.3" path="/syzkaller-testdir204121648/syzkaller.2a6tti/103" dev="sda" ino=16021 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.6'. mmap: syz-executor.0 (7516) uses deprecated remap_file_pages() syscall. See Documentation/mm/remap_file_pages.rst. Bluetooth: hci7: unexpected event for opcode 0x2028 Bluetooth: hci7: SCO packet for unknown connection handle 201 tmpfs: Unknown parameter '~J1Mĝ{GH hG;!7[T?fb' Bluetooth: hci7: SCO packet for unknown connection handle 201 Bluetooth: hci7: unexpected event for opcode 0x2028 Bluetooth: hci7: SCO packet for unknown connection handle 201 tmpfs: Unknown parameter '~J1Mĝ{GH hG;!7[T?fb' Bluetooth: hci7: SCO packet for unknown connection handle 201 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.5'. set_capacity_and_notify: 5 callbacks suppressed loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): ext4_check_descriptors: Checksum for group 0 failed (46507!=0) EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: writeback. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): ext4_check_descriptors: Checksum for group 0 failed (46507!=0) EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: writeback. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): ext4_check_descriptors: Checksum for group 0 failed (46507!=0) EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: writeback. audit: type=1400 audit(1768297677.362:16): avc: denied { watch_reads } for pid=7669 comm="syz-executor.6" path="/syzkaller-testdir404587123/syzkaller.2EfmtJ/117/file0" dev="rpc_pipefs" ino=15452 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:rpc_pipefs_t:s0 tclass=dir permissive=1 EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): ext4_check_descriptors: Checksum for group 0 failed (46507!=0) EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: writeback. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.6'. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1326 audit(1768297677.857:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=7720 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fdd65f19b19 code=0x0 sg_write: data in/out 512/246 bytes for SCSI command 0x0-- guessing data in; program syz-executor.5 not setting count and/or reply_len properly sg_write: data in/out 512/246 bytes for SCSI command 0x0-- guessing data in; program syz-executor.5 not setting count and/or reply_len properly 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 audit: type=1326 audit(1768297678.691:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=7720 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fdd65f19b19 code=0x0 audit: type=1326 audit(1768297678.825:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=7765 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fdd65f19b19 code=0x0 serio: Serial port ptm0 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium serio: Serial port ptm0 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.6'.