===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.2/4252 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.2/4252: #0: ffff88800fa9a3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888049d1ecb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fa9e950 (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: 4252 Comm: syz-executor.2 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: 0033:0x7f9ef2a56427 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:00007ffe1fcfb268 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9ef2a56427 RDX: 00007ffe1fcfb343 RSI: 00007f9ef2ab102f RDI: 00007ffe1fcfb330 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe1fcfb100 R10: 00007ffe1fcfafb7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe1fcfb330 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.2/4252 Modules linked in: CPU: 1 UID: 0 PID: 4252 Comm: syz-executor.2 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:ffff88804ad5f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888048bf1b80 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff888048bf1f7c RBP: ffff888048bf1b80 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888048bf1b80 R13: 0000000000000001 R14: ffffffff85c10ad0 R15: ffff888049e99fb0 FS: 000055558f268400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f54913a6540 CR3: 00000000494ee000 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: 0033:0x7f9ef2a56427 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:00007ffe1fcfb268 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9ef2a56427 RDX: 00007ffe1fcfb343 RSI: 00007f9ef2ab102f RDI: 00007ffe1fcfb330 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe1fcfb100 R10: 00007ffe1fcfafb7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe1fcfb330 irq event stamp: 451 hardirqs last enabled at (451): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (450): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (446): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (444): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop0: detected capacity change from 0 to 1024 EXT4-fs error (device loop0): ext4_quota_enable:7177: inode #3: comm syz-executor.0: iget: special inode unallocated EXT4-fs error (device loop0): ext4_quota_enable:7179: comm syz-executor.0: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop0): ext4_enable_quotas:7217: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed loop0: detected capacity change from 0 to 1024 EXT4-fs error (device loop0): ext4_quota_enable:7177: inode #3: comm syz-executor.0: iget: special inode unallocated EXT4-fs error (device loop0): ext4_quota_enable:7179: comm syz-executor.0: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop0): ext4_enable_quotas:7217: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed loop0: detected capacity change from 0 to 1024 EXT4-fs error (device loop0): ext4_quota_enable:7177: inode #3: comm syz-executor.0: iget: special inode unallocated EXT4-fs error (device loop0): ext4_quota_enable:7179: comm syz-executor.0: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop0): ext4_enable_quotas:7217: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed loop0: detected capacity change from 0 to 1024 EXT4-fs error (device loop0): ext4_quota_enable:7177: inode #3: comm syz-executor.0: iget: special inode unallocated EXT4-fs error (device loop0): ext4_quota_enable:7179: comm syz-executor.0: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop0): ext4_enable_quotas:7217: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed loop0: detected capacity change from 0 to 1024 EXT4-fs error (device loop0): ext4_quota_enable:7177: inode #3: comm syz-executor.0: iget: special inode unallocated EXT4-fs error (device loop0): ext4_quota_enable:7179: comm syz-executor.0: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop0): ext4_enable_quotas:7217: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed loop4: detected capacity change from 0 to 264192 loop4: detected capacity change from 0 to 264192 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 audit: type=1400 audit(1768296081.121:11): avc: denied { write } for pid=4528 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 random: crng reseeded on system resumption random: crng reseeded on system resumption random: crng reseeded on system resumption sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x800800 phys_seg 3 prio class 2 Buffer I/O error on dev sr0, logical block 0, lost async page write Buffer I/O error on dev sr0, logical block 1, lost async page write Buffer I/O error on dev sr0, logical block 2, lost async page write random: crng reseeded on system resumption sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x800800 phys_seg 3 prio class 2 Buffer I/O error on dev sr0, logical block 0, lost async page write Buffer I/O error on dev sr0, logical block 1, lost async page write Buffer I/O error on dev sr0, logical block 2, lost async page write random: crng reseeded on system resumption random: crng reseeded on system resumption sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x800800 phys_seg 3 prio class 2 Buffer I/O error on dev sr0, logical block 0, lost async page write Buffer I/O error on dev sr0, logical block 1, lost async page write Buffer I/O error on dev sr0, logical block 2, lost async page write random: crng reseeded on system resumption sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x800800 phys_seg 3 prio class 2 Buffer I/O error on dev sr0, logical block 0, lost async page write sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x800800 phys_seg 3 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x800800 phys_seg 3 prio class 2 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'. UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list audit: type=1401 audit(1768296083.176:12): op=setxattr invalid_context="" audit: type=1401 audit(1768296083.180:13): op=setxattr invalid_context="" netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. Zero length message leads to an empty skb