loop0: detected capacity change from 0 to 16383 loop0: detected capacity change from 0 to 16383 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.6/4668 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.6/4668: #0: ffff88800f62a3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888048d8a078 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f62e950 (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: 4668 Comm: syz-executor.6 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: 0033:0x7f2616320427 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:00007ffc9d0d2de8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2616320427 RDX: ffffffffffffffbc RSI: 00007f261637b00e RDI: 00007f261637a1dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc9d0d2860 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc9d0d2eb0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.6/4668 Modules linked in: CPU: 1 UID: 0 PID: 4668 Comm: syz-executor.6 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:ffff88804a34f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804b429b80 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88804b429f7c RBP: ffff88804b429b80 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804b429b80 R13: 0000000000000001 R14: ffffffff85c0fae0 R15: ffff888048d8bc48 FS: 0000555570209400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555570209708 CR3: 0000000016e8b000 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: 0033:0x7f2616320427 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:00007ffc9d0d2de8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2616320427 RDX: ffffffffffffffbc RSI: 00007f261637b00e RDI: 00007f261637a1dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc9d0d2860 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc9d0d2eb0 irq event stamp: 2215 hardirqs last enabled at (2215): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (2214): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (2210): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (2208): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop0: detected capacity change from 0 to 16383 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 loop0: detected capacity change from 0 to 16383 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 netlink: 'syz-executor.3': attribute type 27 has an invalid length. loop0: detected capacity change from 0 to 16383 tmpfs: Unknown parameter 'nl80211' SELinux: unrecognized netlink message: protocol=6 nlmsg_type=1792 sclass=netlink_xfrm_socket pid=4863 comm=syz-executor.3 EXT4-fs (sda): Can't modify superblock whileperforming online resize netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. EXT4-fs (sda): Can't modify superblock whileperforming online resize program syz-executor.6 is using a deprecated SCSI ioctl, please convert it to SG_IO loop6: detected capacity change from 0 to 512 SELinux: security_context_str_to_sid () failed with errno=-22 EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. SELinux: security_context_str_to_sid () failed with errno=-22 EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop2: detected capacity change from 0 to 4 FAT-fs (loop2): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. audit: type=1400 audit(1768383016.151:13): avc: denied { watch_reads } for pid=5065 comm="syz-executor.1" path="/syzkaller-testdir397313069/syzkaller.qJjHAC/60" dev="sda" ino=15971 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1 loop6: detected capacity change from 0 to 2048 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium loop6: detected capacity change from 0 to 2048 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop6: detected capacity change from 0 to 2048 EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop6: detected capacity change from 0 to 2048 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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 mac80211_hwsim hwsim9 wlan1: entered promiscuous mode mac80211_hwsim hwsim9 wlan1: left promiscuous mode mac80211_hwsim hwsim9 wlan1: entered promiscuous mode mac80211_hwsim hwsim9 wlan1: left promiscuous mode mac80211_hwsim hwsim9 wlan1: entered promiscuous mode mac80211_hwsim hwsim9 wlan1: left promiscuous mode mac80211_hwsim hwsim9 wlan1: entered promiscuous mode mac80211_hwsim hwsim9 wlan1: left promiscuous mode mac80211_hwsim hwsim9 wlan1: entered promiscuous mode faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 mac80211_hwsim hwsim9 wlan1: left promiscuous mode audit: type=1326 audit(1768383018.919:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5277 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f8891ab3b19 code=0x7ffc0000 audit: type=1326 audit(1768383018.923:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5277 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=206 compat=0 ip=0x7f8891ab3b19 code=0x7ffc0000 audit: type=1326 audit(1768383018.923:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5277 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f8891ab3b19 code=0x7ffc0000 audit: type=1326 audit(1768383018.927:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5277 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=207 compat=0 ip=0x7f8891ab3b19 code=0x7ffc0000 audit: type=1326 audit(1768383018.969:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5277 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f8891ab3b19 code=0x7ffc0000 audit: type=1326 audit(1768383018.969:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5277 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7f8891ab3b19 code=0x7ffc0000 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 audit: type=1326 audit(1768383018.970:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5277 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f8891ab3b19 code=0x7ffc0000 audit: type=1326 audit(1768383018.971:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5277 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=206 compat=0 ip=0x7f8891ab3b19 code=0x7ffc0000 audit: type=1326 audit(1768383018.972:22): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5277 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f8891ab3b19 code=0x7ffc0000 capability: warning: `syz-executor.4' uses deprecated v2 capabilities in a way that may be insecure Process accounting resumed faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 Process accounting resumed Process accounting resumed faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 Process accounting resumed Process accounting resumed faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 Process accounting resumed netlink: 'syz-executor.0': attribute type 16 has an invalid length. Process accounting resumed