loop7: detected capacity change from 0 to 1024 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.3/4092 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.3/4092: #0: ffff88800f5ea3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801ee28d68 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f5ee950 (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: 4092 Comm: syz-executor.3 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: 0033:0x7f4a715cd427 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:00007ffdf3559668 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4a715cd427 RDX: 00007ffdf3559743 RSI: 00007f4a7162802f RDI: 00007ffdf3559730 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdf3559500 R10: 00007ffdf35593b7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffdf3559730 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.3/4092 Modules linked in: CPU: 1 UID: 0 PID: 4092 Comm: syz-executor.3 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:ffff88804a2879a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804bcf3700 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88804bcf3afc RBP: ffff88804bcf3700 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804bcf3700 R13: 0000000000000001 R14: ffffffff85c103f0 R15: ffff88801edf9fb0 FS: 000055556460e400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556460e708 CR3: 000000004b487000 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: 0033:0x7f4a715cd427 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:00007ffdf3559668 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4a715cd427 RDX: 00007ffdf3559743 RSI: 00007f4a7162802f RDI: 00007ffdf3559730 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdf3559500 R10: 00007ffdf35593b7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffdf3559730 irq event stamp: 413 hardirqs last enabled at (413): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (412): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (408): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (406): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 1024 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. mmap: syz-executor.6 (4143) uses deprecated remap_file_pages() syscall. See Documentation/mm/remap_file_pages.rst. Bluetooth: hci0: unexpected cc 0x2029 length: 0 < 1 Bluetooth: hci0: ACL packet for unknown connection handle 2745 Bluetooth: hci0: unexpected event 0x2f length: 763 > 260 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci0: unexpected cc 0x2029 length: 0 < 1 Bluetooth: hci0: ACL packet for unknown connection handle 2745 Bluetooth: hci0: unexpected event 0x2f length: 763 > 260 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci0: unexpected cc 0x2029 length: 0 < 1 Bluetooth: hci0: ACL packet for unknown connection handle 2745 Bluetooth: hci0: unexpected event 0x2f length: 763 > 260 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci0: unexpected cc 0x2029 length: 0 < 1 Bluetooth: hci0: ACL packet for unknown connection handle 2745 Bluetooth: hci0: unexpected event 0x2f length: 763 > 260 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci0: unexpected cc 0x2029 length: 0 < 1 Bluetooth: hci0: ACL packet for unknown connection handle 2745 Bluetooth: hci0: unexpected event 0x2f length: 763 > 260 Bluetooth: hci0: ISO packet for unknown connection handle 1106 ICMPv6: NA: 08:bd:00:e6:d6:48 advertised our address fe80::aa on syz_tun! ICMPv6: NA: 08:bd:00:e6:d6:48 advertised our address fe80::aa on syz_tun! ICMPv6: NA: 08:bd:00:e6:d6:48 advertised our address fe80::aa on syz_tun! ICMPv6: NA: 08:bd:00:e6:d6:48 advertised our address fe80::aa on syz_tun! ICMPv6: NA: 08:bd:00:e6:d6:48 advertised our address fe80::aa on syz_tun! UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list syz-executor.2 (4501) used greatest stack depth: 23544 bytes left UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 Bluetooth: hci0: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci0: Injecting HCI hardware error event Bluetooth: hci0: hardware error 0x00 loop0: detected capacity change from 0 to 64 audit: type=1400 audit(130.463:10): avc: denied { tracepoint } for pid=4573 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 FAT-fs (loop0): bogus number of FAT structure FAT-fs (loop0): Can't find a valid FAT filesystem loop0: detected capacity change from 0 to 64 FAT-fs (loop0): bogus number of FAT structure FAT-fs (loop0): Can't find a valid FAT filesystem audit: type=1400 audit(130.640:11): avc: denied { watch } for pid=4591 comm="syz-executor.1" path="/proc/4591/task" dev="proc" ino=7619 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dir permissive=1 loop2: detected capacity change from 0 to 1 FAT-fs (loop2): bogus number of FAT sectors FAT-fs (loop2): Can't find a valid FAT filesystem loop2: detected capacity change from 0 to 1 FAT-fs (loop2): bogus number of FAT sectors FAT-fs (loop2): Can't find a valid FAT filesystem loop2: detected capacity change from 0 to 1 FAT-fs (loop2): bogus number of FAT sectors FAT-fs (loop2): Can't find a valid FAT filesystem loop0: detected capacity change from 0 to 64 FAT-fs (loop0): bogus number of FAT structure FAT-fs (loop0): Can't find a valid FAT filesystem loop2: detected capacity change from 0 to 1 FAT-fs (loop2): bogus number of FAT sectors FAT-fs (loop2): Can't find a valid FAT filesystem loop2: detected capacity change from 0 to 1 FAT-fs (loop2): bogus number of FAT sectors FAT-fs (loop2): Can't find a valid FAT filesystem loop0: detected capacity change from 0 to 64 FAT-fs (loop0): bogus number of FAT structure FAT-fs (loop0): Can't find a valid FAT filesystem loop4: detected capacity change from 0 to 64 FAT-fs (loop4): bogus number of FAT structure FAT-fs (loop4): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of FAT structure FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop4): bogus number of FAT structure FAT-fs (loop4): Can't find a valid FAT filesystem FAT-fs (loop2): bogus number of FAT structure FAT-fs (loop2): Can't find a valid FAT filesystem FAT-fs (loop0): bogus number of FAT structure FAT-fs (loop0): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of FAT structure FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of FAT structure FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop2): bogus number of FAT structure FAT-fs (loop2): Can't find a valid FAT filesystem FAT-fs (loop4): bogus number of FAT structure FAT-fs (loop4): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of FAT structure FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of FAT structure FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop2): bogus number of FAT structure FAT-fs (loop2): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of FAT structure FAT-fs (loop1): Can't find a valid FAT filesystem EXT4-fs (loop7): Can't support bigalloc feature without extents feature EXT4-fs (loop7): Can't support bigalloc feature without extents feature FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) EXT4-fs (loop7): Can't support bigalloc feature without extents feature Bluetooth: hci0: Opcode 0x0c03 failed: -110 FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) EXT4-fs (loop7): Can't support bigalloc feature without extents feature FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) EXT4-fs (loop7): Can't support bigalloc feature without extents feature FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): 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 (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) audit: type=1400 audit(133.223:12): avc: denied { create } for pid=4856 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:fonts_t:s0 tclass=netlink_generic_socket permissive=1 audit: type=1400 audit(133.223:13): avc: denied { write } for pid=4856 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:fonts_t:s0 tclass=netlink_generic_socket permissive=1 audit: type=1400 audit(133.224:14): avc: denied { read } for pid=4856 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:fonts_t:s0 tclass=netlink_generic_socket permissive=1 netlink: 20 bytes leftover after parsing attributes in process `syz-executor.7'. ieee80211 phy18: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.7'. ieee80211 phy19: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.7'. ieee80211 phy20: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.7'. ieee80211 phy21: Selected rate control algorithm 'minstrel_ht' random: crng reseeded on system resumption random: crng reseeded on system resumption