===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.5/4799 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.5/4799: #0: ffff88800f8b43f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888049d4b388 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f8c8950 (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: 0 UID: 0 PID: 4799 Comm: syz-executor.5 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: 0033:0x7ff8415ee427 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:00007ffe5021f268 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff8415ee427 RDX: 00007ffe5021f343 RSI: 00007ff841649022 RDI: 00007ffe5021f330 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe5021f100 R10: 00007ffe5021efb7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe5021f330 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.5/4799 Modules linked in: CPU: 0 UID: 0 PID: 4799 Comm: syz-executor.5 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:ffff8880495df9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888048a38000 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff888048a383fc RBP: ffff888048a38000 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff888048a38000 R13: 0000000000000001 R14: ffffffff85c108a0 R15: ffff888049d4c5d0 FS: 0000555594b18400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff84166e545 CR3: 000000000b71a000 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: 0033:0x7ff8415ee427 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:00007ffe5021f268 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff8415ee427 RDX: 00007ffe5021f343 RSI: 00007ff841649022 RDI: 00007ffe5021f330 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe5021f100 R10: 00007ffe5021efb7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe5021f330 irq event stamp: 679 hardirqs last enabled at (679): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (678): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (674): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (672): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- netlink: 20 bytes leftover after parsing attributes in process `syz-executor.7'. ieee80211 phy18: Selected rate control algorithm 'minstrel_ht' syz-executor.2 uses obsolete (PF_INET,SOCK_PACKET) 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' audit: type=1326 audit(1768384481.489:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4936 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc6b0bd0b19 code=0x0 process 'syz-executor.5' launched './file1' with NULL argv: empty string added audit: type=1326 audit(1768384482.324:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4936 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc6b0bd0b19 code=0x0 audit: type=1326 audit(1768384482.438:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4992 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc6b0bd0b19 code=0x0 audit: type=1326 audit(1768384483.365:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5032 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc6b0bd0b19 code=0x0 UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list wlan0: mtu less than device minimum audit: type=1326 audit(1768384484.300:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5065 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc6b0bd0b19 code=0x0 wlan0: mtu less than device minimum wlan0: mtu less than device minimum wlan0: mtu less than device minimum tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium 9p: Could not find request transport: unixµ8íúæ{!¬ÖZæ;vb+Š¯bTT—&Z$côÆÙÏ„š'øÚÝíXÙY9"Bn 9p: Could not find request transport: unixµ8íúæ{!¬ÖZæ;vb+Š¯bTT—&Z$côÆÙÏ„š'øÚÝíXÙY9"Bn 9p: Could not find request transport: unixµ8íúæ{!¬ÖZæ;vb+Š¯bTT—&Z$côÆÙÏ„š'øÚÝíXÙY9"Bn SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=5173 comm=syz-executor.1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=5175 comm=syz-executor.1 9p: Could not find request transport: unixµ8íúæ{!¬ÖZæ;vb+Š¯bTT—&Z$côÆÙÏ„š'øÚÝíXÙY9"Bn 9p: Could not find request transport: unixµ8íúæ{!¬ÖZæ;vb+Š¯bTT—&Z$côÆÙÏ„š'øÚÝíXÙY9"Bn netlink: 'syz-executor.0': attribute type 8 has an invalid length. netlink: 'syz-executor.0': attribute type 8 has an invalid length. netlink: 'syz-executor.0': attribute type 8 has an invalid length. netlink: 'syz-executor.0': attribute type 8 has an invalid length. netlink: 'syz-executor.0': attribute type 8 has an invalid length. loop1: detected capacity change from 0 to 2048 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir339462605/syzkaller.QCFuhV/78/file0 supports timestamps until 2038-01-19 (0x7fffffff) netlink: 8 bytes leftover after parsing attributes in process `syz-executor.6'. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=5307 comm=syz-executor.5 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.6'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=5318 comm=syz-executor.5 loop1: detected capacity change from 0 to 2048 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir339462605/syzkaller.QCFuhV/81/file0 supports timestamps until 2038-01-19 (0x7fffffff) netlink: 8 bytes leftover after parsing attributes in process `syz-executor.6'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=5341 comm=syz-executor.5 EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.6'. loop1: detected capacity change from 0 to 4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=5360 comm=syz-executor.5 EXT4-fs (loop1): VFS: Can't find ext4 filesystem loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): VFS: Can't find ext4 filesystem netlink: 8 bytes leftover after parsing attributes in process `syz-executor.6'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=5379 comm=syz-executor.5 loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): VFS: Can't find ext4 filesystem loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): VFS: Can't find ext4 filesystem loop1: detected capacity change from 0 to 4 ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= EXT4-fs (loop1): VFS: Can't find ext4 filesystem netlink: 112 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 112 bytes leftover after parsing attributes in process `syz-executor.5'. mmap: syz-executor.5 (5478) uses deprecated remap_file_pages() syscall. See Documentation/mm/remap_file_pages.rst. ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy0 wpan0: encryption failed: -22 audit: type=1400 audit(1768384490.370:18): avc: denied { tracepoint } for pid=5488 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