===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.0/4514 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.0/4514: #0: ffff88800f76e3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804b447640 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f7d2950 (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: 4514 Comm: syz-executor.0 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: 0033:0x7faa7042d427 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:00007ffc1e8ef358 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faa7042d427 RDX: 00007ffc1e8ef437 RSI: 00007faa70488019 RDI: 00007ffc1e8ef420 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc1e8ef1f0 R10: 00007ffc1e8ef0a7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc1e8ef420 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/4514 Modules linked in: CPU: 1 UID: 0 PID: 4514 Comm: syz-executor.0 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:ffff88804bb479a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804bb0b700 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88804bb0bafc RBP: ffff88804bb0b700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804bb0b700 R13: 0000000000000001 R14: ffffffff85c0edc0 R15: ffff8880484d2938 FS: 000055556bc44400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faa704ad540 CR3: 000000004ba2c000 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: 0033:0x7faa7042d427 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:00007ffc1e8ef358 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faa7042d427 RDX: 00007ffc1e8ef437 RSI: 00007faa70488019 RDI: 00007ffc1e8ef420 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc1e8ef1f0 R10: 00007ffc1e8ef0a7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc1e8ef420 irq event stamp: 163 hardirqs last enabled at (163): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (162): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (158): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (156): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- program syz-executor.0 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.0 is using a deprecated SCSI ioctl, please convert it to SG_IO loop4: detected capacity change from 0 to 264192 audit: type=1400 audit(1768382552.672:10): avc: denied { write } for pid=4616 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 audit: type=1400 audit(1768382552.720:11): avc: denied { block_suspend } for pid=4630 comm="syz-executor.2" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 Bluetooth: hci6: unexpected event 0x3e length: 431 > 260 Bluetooth: hci6: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci6: adv larger than maximum supported Bluetooth: hci6: adv larger than maximum supported Bluetooth: hci6: unexpected event 0x3e length: 431 > 260 Bluetooth: hci6: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci6: adv larger than maximum supported Bluetooth: hci6: adv larger than maximum supported blktrace: Concurrent blktraces are not allowed on sg0 audit: type=1400 audit(1768382554.559:12): avc: denied { tracepoint } for pid=4915 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 FAT-fs (loop3): bogus number of FAT structure FAT-fs (loop3): Can't find a valid FAT filesystem set_capacity_and_notify: 1 callbacks suppressed loop3: detected capacity change from 0 to 64 FAT-fs (loop3): bogus number of FAT structure FAT-fs (loop3): Can't find a valid FAT filesystem UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list Process accounting resumed audit: type=1400 audit(1768382554.985:13): avc: denied { read } for pid=4981 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 Process accounting resumed Process accounting resumed loop6: detected capacity change from 0 to 512 EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. Process accounting resumed EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. Process accounting resumed Process accounting resumed Process accounting resumed loop2: detected capacity change from 0 to 6 loop6: detected capacity change from 0 to 256 FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop6): count of clusters too big (79870) FAT-fs (loop6): Can't find a valid FAT filesystem FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed loop6: detected capacity change from 0 to 256 Process accounting resumed FAT-fs (loop6): count of clusters too big (79870) FAT-fs (loop6): Can't find a valid FAT filesystem loop6: detected capacity change from 0 to 256 loop2: detected capacity change from 0 to 6 FAT-fs (loop6): count of clusters too big (79870) FAT-fs (loop6): Can't find a valid FAT filesystem FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed audit: type=1400 audit(1768382557.063:14): avc: denied { watch } for pid=5129 comm="syz-executor.5" path="/proc/5129/task" dev="proc" ino=9732 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 6 loop6: detected capacity change from 0 to 256 FAT-fs (loop6): count of clusters too big (79870) FAT-fs (loop6): Can't find a valid FAT filesystem FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed loop6: detected capacity change from 0 to 256 FAT-fs (loop6): count of clusters too big (79870) FAT-fs (loop6): Can't find a valid FAT filesystem FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed ISO 9660 Extensions: Microsoft Joliet Level 0 ISO 9660 Extensions: process 'syz-executor.3' launched './file1' with NULL argv: empty string added FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium 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 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) syz-executor.3 (5202) used greatest stack depth: 22896 bytes left mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) 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 Restarting kernel threads ... Done restarting kernel threads. random: crng reseeded on system resumption Restarting kernel threads ... Done restarting kernel threads. faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 Restarting kernel threads ... Done restarting kernel threads. FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) random: crng reseeded on system resumption Restarting kernel threads ... Done restarting kernel threads. EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. random: crng reseeded on system resumption Restarting kernel threads ... Done restarting kernel threads. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. random: crng reseeded on system resumption Restarting kernel threads ... Done restarting kernel threads. program syz-executor.6 is using a deprecated SCSI ioctl, please convert it to SG_IO set_capacity_and_notify: 7 callbacks suppressed loop3: detected capacity change from 0 to 4 EXT4-fs (loop3): bad geometry: block count 256 exceeds size of device (2 blocks) loop3: detected capacity change from 0 to 4 EXT4-fs (loop3): bad geometry: block count 256 exceeds size of device (2 blocks) loop6: detected capacity change from 0 to 68 FAT-fs (loop6): error, invalid access to FAT (entry 0x000000ff) FAT-fs (loop6): Filesystem has been set read-only loop3: detected capacity change from 0 to 4