Buffer I/O error on dev sr0, logical block 3, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 4 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.2/4676 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.2/4676: #0: ffff88800ec403f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88803230b388 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800ec44950 (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: 4676 Comm: syz-executor.2 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: 0033:0x7f18509b8427 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:00007ffe9ee62428 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f18509b8427 RDX: ffffffffffffffbc RSI: 00007f1850a1300e RDI: 00007f1850a121dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe9ee61ea0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe9ee624f0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.2/4676 Modules linked in: CPU: 1 UID: 0 PID: 4676 Comm: syz-executor.2 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:ffff88802fc1f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888045d83700 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff888045d83afc RBP: ffff888045d83700 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888045d83700 R13: 0000000000000001 R14: ffffffff85c0de70 R15: ffff88801c3f8ca0 FS: 000055556d810400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556d810708 CR3: 000000005b501000 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: 0033:0x7f18509b8427 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:00007ffe9ee62428 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f18509b8427 RDX: ffffffffffffffbc RSI: 00007f1850a1300e RDI: 00007f1850a121dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe9ee61ea0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe9ee624f0 irq event stamp: 691 hardirqs last enabled at (691): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (690): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (684): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (682): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- Buffer I/O error on dev sr0, logical block 4, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 5 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 5, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 6 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 6, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 7 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 7, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 0, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev sr0, logical block 1, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer Bluetooth: hci1: ACL packet for unknown connection handle 2745 Bluetooth: hci1: ISO packet for unknown connection handle 1106 Bluetooth: hci1: ACL packet for unknown connection handle 2745 Bluetooth: hci1: ISO packet for unknown connection handle 1106 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 06 00 sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer Bluetooth: hci1: ACL packet for unknown connection handle 2745 Bluetooth: hci1: ISO packet for unknown connection handle 1106 sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer Bluetooth: hci0: ACL packet for unknown connection handle 2745 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci6: ACL packet for unknown connection handle 2745 Bluetooth: hci6: ISO packet for unknown connection handle 1106 Bluetooth: hci1: ACL packet for unknown connection handle 2745 Bluetooth: hci1: ISO packet for unknown connection handle 1106 Bluetooth: hci0: ACL packet for unknown connection handle 2745 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci6: ACL packet for unknown connection handle 2745 Bluetooth: hci1: ACL packet for unknown connection handle 2745 Bluetooth: hci6: ISO packet for unknown connection handle 1106 Bluetooth: hci1: ISO packet for unknown connection handle 1106 Bluetooth: hci0: ACL packet for unknown connection handle 2745 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci6: ACL packet for unknown connection handle 2745 Bluetooth: hci6: ISO packet for unknown connection handle 1106 audit: type=1400 audit(1768294690.056:15): avc: denied { watch_reads } for pid=4766 comm="syz-executor.2" path="/syzkaller-testdir659762373/syzkaller.P2aJfV/56/file0" dev="tmpfs" ino=1 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir permissive=1 tmpfs: Unknown parameter './file0' UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list audit: type=1400 audit(1768294691.444:16): avc: denied { write } for pid=4941 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 set_capacity_and_notify: 8 callbacks suppressed loop5: detected capacity change from 0 to 1024 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop1): unable to read superblock EXT4-fs (loop1): unable to read superblock EXT4-fs (loop1): unable to read superblock loop7: detected capacity change from 0 to 2048 EXT4-fs error (device loop7): __ext4_fill_super:5553: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed loop7: detected capacity change from 0 to 2048 EXT4-fs error (device loop7): __ext4_fill_super:5553: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed EXT4-fs (loop1): unable to read superblock cgroup: Unknown subsys name 'cpuset' cgroup: Unknown subsys name 'cpuset' loop7: detected capacity change from 0 to 2048 EXT4-fs error (device loop7): __ext4_fill_super:5553: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed cgroup: Unknown subsys name 'cpuset' loop7: detected capacity change from 0 to 2048 cgroup: Unknown subsys name 'cpuset' EXT4-fs error (device loop7): __ext4_fill_super:5553: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed cgroup: Unknown subsys name 'cpuset' loop7: detected capacity change from 0 to 2048 EXT4-fs error (device loop7): __ext4_fill_super:5553: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed loop2: detected capacity change from 0 to 68 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop2: detected capacity change from 0 to 68 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop2: detected capacity change from 0 to 68 program syz-executor.5 is using a deprecated SCSI ioctl, please convert it to SG_IO FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) Bluetooth: hci1: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci1: Injecting HCI hardware error event Bluetooth: hci1: hardware error 0x00 loop2: detected capacity change from 0 to 68 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) program syz-executor.5 is using a deprecated SCSI ioctl, please convert it to SG_IO Bluetooth: hci6: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci0: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci6: Injecting HCI hardware error event Bluetooth: hci0: Injecting HCI hardware error event Bluetooth: hci6: hardware error 0x00 Bluetooth: hci0: hardware error 0x00 program syz-executor.5 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.5 is using a deprecated SCSI ioctl, please convert it to SG_IO Bluetooth: hci7: link tx timeout Bluetooth: hci7: killing stalled connection 11:aa:aa:aa:aa:aa audit: type=1400 audit(1768294693.870:17): avc: denied { tracepoint } for pid=5193 comm="syz-executor.6" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 Bluetooth: hci2: Opcode 0x0c1a failed: -4 Bluetooth: hci2: Opcode 0x0406 failed: -4 Bluetooth: hci2: Opcode 0x0406 failed: -4 Bluetooth: hci3: Opcode 0x0c1a failed: -4 Bluetooth: hci3: Opcode 0x0406 failed: -4 Bluetooth: hci3: Opcode 0x0406 failed: -4 Bluetooth: hci4: Opcode 0x0c1a failed: -4 Bluetooth: hci4: Opcode 0x0406 failed: -4 Bluetooth: hci4: Opcode 0x0406 failed: -4 Bluetooth: hci5: Opcode 0x0c1a failed: -4 Bluetooth: hci5: Opcode 0x0406 failed: -4 Bluetooth: hci5: Opcode 0x0406 failed: -4 Bluetooth: hci7: Opcode 0x0c1a failed: -4 Bluetooth: hci7: Opcode 0x0406 failed: -4 Bluetooth: hci7: Opcode 0x0406 failed: -4 Bluetooth: hci2: Opcode 0x0c1a failed: -4 Bluetooth: hci3: Opcode 0x0c1a failed: -4 Bluetooth: hci4: Opcode 0x0c1a failed: -4 Bluetooth: hci5: Opcode 0x0c1a failed: -4 Bluetooth: hci7: Opcode 0x0c1a failed: -4 vfat: Bad value for 'utf8' vfat: Bad value for 'utf8' Bluetooth: hci2: Opcode 0x0c1a failed: -4 Bluetooth: hci3: Opcode 0x0c1a failed: -4 Bluetooth: hci4: Opcode 0x0c1a failed: -4 Bluetooth: hci5: Opcode 0x0c1a failed: -4 Bluetooth: hci7: Opcode 0x0c1a failed: -4 vfat: Bad value for 'utf8' Bluetooth: hci2: Opcode 0x0c1a failed: -4 Bluetooth: hci3: Opcode 0x0c1a failed: -4 Bluetooth: hci4: Opcode 0x0c1a failed: -4 Bluetooth: hci5: Opcode 0x0c1a failed: -4 Bluetooth: hci7: Opcode 0x0c1a failed: -4 vfat: Bad value for 'utf8' Bluetooth: hci2: Opcode 0x0c1a failed: -4 Bluetooth: hci3: Opcode 0x0c1a failed: -4 Bluetooth: hci4: Opcode 0x0c1a failed: -4 Bluetooth: hci5: Opcode 0x0c1a failed: -4 Bluetooth: hci7: Opcode 0x0c1a failed: -4 vfat: Bad value for 'utf8' Bluetooth: hci1: Opcode 0x0c03 failed: -110 Bluetooth: hci6: Opcode 0x0c03 failed: -110 Bluetooth: hci0: Opcode 0x0c03 failed: -110 Bluetooth: hci7: command 0x0405 tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci2: command 0x0c1a tx timeout loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0405 tx timeout Bluetooth: hci2: command 0x0c1a tx timeout netlink: 12 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.6'. mac80211_hwsim hwsim3 wlan1: entered allmulticast mode mac80211_hwsim hwsim3 wlan1: left allmulticast mode mac80211_hwsim hwsim3 wlan1: entered allmulticast mode mac80211_hwsim hwsim3 wlan1: left allmulticast mode netlink: 200 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 200 bytes leftover after parsing attributes in process `syz-executor.4'.