===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.2/276 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.2/276: #0: ffff88800f6783f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880179e6cb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f662950 (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: 276 Comm: syz-executor.2 Not tainted 6.19.0-rc5-next-20260115 #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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc183e05c27 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 53 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:00007fff84b6ee88 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff84b6ef10 RCX: 00007fc183e05c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fff84b6ef10 RBP: 00007fff84b6eeec R08: 0000000000000000 R09: 0000000000000004 R10: 00007fff84b6ec26 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000200e0 R14: 0000000000000005 R15: 00007fff84b6ef50 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.2/276 Modules linked in: CPU: 0 UID: 0 PID: 276 Comm: syz-executor.2 Not tainted 6.19.0-rc5-next-20260115 #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 d6 b7 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 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff88801417f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801a119b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801a119f7c RBP: ffff88801a119b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801a119b80 R13: 0000000000000001 R14: ffffffff85c0cd90 R15: ffff88801f529fb0 FS: 0000555585536400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3987d56718 CR3: 000000000dc79000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc183e05c27 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 53 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:00007fff84b6ee88 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff84b6ef10 RCX: 00007fc183e05c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fff84b6ef10 RBP: 00007fff84b6eeec R08: 0000000000000000 R09: 0000000000000004 R10: 00007fff84b6ec26 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000200e0 R14: 0000000000000005 R15: 00007fff84b6ef50 irq event stamp: 191933 hardirqs last enabled at (191933): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (191932): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (191928): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (191926): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop5: detected capacity change from 0 to 512 UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list loop7: detected capacity change from 0 to 256 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. 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. 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. 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. mmap: syz-executor.6 (4288) uses deprecated remap_file_pages() syscall. See Documentation/mm/remap_file_pages.rst. audit: type=1326 audit(1768468418.844:10): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4527 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc183e06b19 code=0x0 loop0: detected capacity change from 0 to 512 tmpfs: Bad value for 'huge' EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. tmpfs: Bad value for 'huge' EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. tmpfs: Bad value for 'huge' loop0: detected capacity change from 0 to 512 9p: Unknown Cache mode or invalid value n EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. tmpfs: Bad value for 'huge' tmpfs: Bad value for 'huge' EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1326 audit(1768468419.674:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4527 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc183e06b19 code=0x0 9p: Unknown Cache mode or invalid value n loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. tmpfs: Bad value for 'huge' tmpfs: Bad value for 'huge' audit: type=1326 audit(1768468419.834:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4596 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc183e06b19 code=0x0 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 9p: Unknown Cache mode or invalid value n loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. 9p: Unknown Cache mode or invalid value n audit: type=1326 audit(1768468420.728:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4619 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc183e06b19 code=0x0 UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list audit: type=1326 audit(1768468421.657:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4640 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc183e06b19 code=0x0 netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'. ieee80211 phy18: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'. ieee80211 phy19: Selected rate control algorithm 'minstrel_ht' tmpfs: Unknown parameter 'nl80211' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'. ieee80211 phy20: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'. ieee80211 phy21: Selected rate control algorithm 'minstrel_ht' syz-executor.3 (4729) used greatest stack depth: 24120 bytes left