R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffddd9fff6f R14: 00007fd4db561300 R15: 0000000000022000 nfs: Bad value for 'defcontext' ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.3/5445 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.3/5445: #0: ffff88800fe783f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a6cd020 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fe7c950 (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: 5445 Comm: syz-executor.3 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: 0033:0x7ff7fecb0427 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:00007fff69b7ef38 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff7fecb0427 RDX: 00007fff69b7f013 RSI: 00007ff7fed0b02f RDI: 00007fff69b7f000 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff69b7edd0 R10: 00007fff69b7ec87 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff69b7f000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.3/5445 Modules linked in: CPU: 0 UID: 0 PID: 5445 Comm: syz-executor.3 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:ffff88804e90f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800f293700 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88800f293afc RBP: ffff88800f293700 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800f293700 R13: 0000000000000001 R14: ffffffff85c0dd30 R15: ffff88804a4de268 FS: 0000555574ed7400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555574ed7708 CR3: 000000001de62000 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: 0033:0x7ff7fecb0427 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:00007fff69b7ef38 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff7fecb0427 RDX: 00007fff69b7f013 RSI: 00007ff7fed0b02f RDI: 00007fff69b7f000 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff69b7edd0 R10: 00007fff69b7ec87 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff69b7f000 irq event stamp: 1263 hardirqs last enabled at (1263): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (1262): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (1258): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (1256): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 5446 Comm: syz-executor.3 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_failslab+0xc2/0x120 __kmalloc_cache_noprof+0x80/0x780 genl_start+0x1e8/0x960 __netlink_dump_start+0x5fd/0x980 genl_family_rcv_msg_dumpit+0x1b6/0x2b0 genl_rcv_msg+0x447/0x7e0 netlink_rcv_skb+0x147/0x430 genl_rcv+0x28/0x40 netlink_unicast+0x5a7/0x870 netlink_sendmsg+0x8a3/0xd80 ____sys_sendmsg+0xa34/0xbf0 ___sys_sendmsg+0x10f/0x1b0 __sys_sendmsg+0x150/0x200 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff7fecb0b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007ff7fc226188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff7fedc3f60 RCX: 00007ff7fecb0b19 RDX: 0000000000000000 RSI: 0000000020001a00 RDI: 0000000000000004 RBP: 00007ff7fc2261d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff69b7ecef R14: 00007ff7fc226300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 0 CPU: 0 UID: 0 PID: 5457 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_fail_alloc_page+0xe0/0x110 prepare_alloc_pages+0x1eb/0x550 __alloc_frozen_pages_noprof+0x185/0x2070 alloc_pages_mpol+0xed/0x340 alloc_pages_noprof+0xa1/0x380 pte_alloc_one+0x1e/0x3f0 __pte_alloc+0x6c/0x3f0 __handle_mm_fault+0x2436/0x2f50 handle_mm_fault+0x2d8/0x750 do_user_addr_fault+0x3cc/0x12b0 exc_page_fault+0xb0/0x180 asm_exc_page_fault+0x26/0x30 RIP: 0010:rep_movs_alternative+0x11/0x90 Code: e9 84 2e 04 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 83 f9 40 73 44 83 f9 08 73 25 85 c9 74 0f 8a 06 <88> 07 48 ff c7 48 ff c6 48 ff c9 75 f1 e9 4d 2e 04 00 66 66 2e 0f RSP: 0018:ffff88804b17fe88 EFLAGS: 00050202 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000002 RDX: ffffed1001d12e01 RSI: ffff88800e897000 RDI: 00000000200000c0 RBP: 00000000200000c0 R08: 0000000000000000 R09: ffffed1001d12e00 R10: ffff88800e897001 R11: 0000000000000000 R12: ffff88800e897000 R13: 00000000200000c2 R14: 00007ffffffff000 R15: 0000000000000000 _copy_to_user+0xbe/0xd0 __do_sys_mincore+0x2c1/0x650 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2859f25b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f285749b188 EFLAGS: 00000246 ORIG_RAX: 000000000000001b RAX: ffffffffffffffda RBX: 00007f285a038f60 RCX: 00007f2859f25b19 RDX: 00000000200000c0 RSI: 0000000000002000 RDI: 000000002053f000 RBP: 00007f285749b1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc5155e6ff R14: 00007f285749b300 R15: 0000000000022000 nfs: Bad value for 'defcontext' nfs: Bad value for 'defcontext' loop2: detected capacity change from 0 to 4 nfs: Bad value for 'defcontext' nfs: Bad value for 'defcontext' nfs: Bad value for 'defcontext' nfs: Bad value for 'defcontext' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 UID: 0 PID: 5474 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_failslab+0xc2/0x120 kmem_cache_alloc_noprof+0x80/0x760 ptlock_alloc+0x21/0x70 pte_alloc_one+0x86/0x3f0 __pte_alloc+0x6c/0x3f0 __handle_mm_fault+0x2436/0x2f50 handle_mm_fault+0x2d8/0x750 do_user_addr_fault+0x3cc/0x12b0 exc_page_fault+0xb0/0x180 asm_exc_page_fault+0x26/0x30 RIP: 0010:rep_movs_alternative+0x11/0x90 Code: e9 84 2e 04 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 83 f9 40 73 44 83 f9 08 73 25 85 c9 74 0f 8a 06 <88> 07 48 ff c7 48 ff c6 48 ff c9 75 f1 e9 4d 2e 04 00 66 66 2e 0f RSP: 0018:ffff88801de2fe88 EFLAGS: 00050202 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000002 RDX: ffffed1001b0b401 RSI: ffff88800d85a000 RDI: 00000000200000c0 RBP: 00000000200000c0 R08: 0000000000000000 R09: ffffed1001b0b400 R10: ffff88800d85a001 R11: 0000000000000000 R12: ffff88800d85a000 R13: 00000000200000c2 R14: 00007ffffffff000 R15: 0000000000000000 _copy_to_user+0xbe/0xd0 __do_sys_mincore+0x2c1/0x650 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2859f25b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f285749b188 EFLAGS: 00000246 ORIG_RAX: 000000000000001b RAX: ffffffffffffffda RBX: 00007f285a038f60 RCX: 00007f2859f25b19 RDX: 00000000200000c0 RSI: 0000000000002000 RDI: 000000002053f000 RBP: 00007f285749b1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc5155e6ff R14: 00007f285749b300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 5480 Comm: syz-executor.5 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_failslab+0xc2/0x120 __kmalloc_cache_noprof+0x80/0x780 genl_start+0x1e8/0x960 __netlink_dump_start+0x5fd/0x980 genl_family_rcv_msg_dumpit+0x1b6/0x2b0 genl_rcv_msg+0x447/0x7e0 netlink_rcv_skb+0x147/0x430 genl_rcv+0x28/0x40 netlink_unicast+0x5a7/0x870 netlink_sendmsg+0x8a3/0xd80 ____sys_sendmsg+0xa34/0xbf0 ___sys_sendmsg+0x10f/0x1b0 __sys_sendmsg+0x150/0x200 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd4ddfebb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fd4db561188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fd4de0fef60 RCX: 00007fd4ddfebb19 RDX: 0000000000000000 RSI: 0000000020001a00 RDI: 0000000000000004 RBP: 00007fd4db5611d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffddd9fff6f R14: 00007fd4db561300 R15: 0000000000022000 loop2: detected capacity change from 0 to 4 nfs: Bad value for 'defcontext' nfs: Bad value for 'defcontext' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 5485 Comm: syz-executor.2 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_failslab+0xc2/0x120 __kmalloc_noprof+0xd6/0x880 kobject_get_path+0xc9/0x200 kobject_uevent_env+0x252/0xf90 loop_configure+0xe3d/0x15a0 lo_ioctl+0x674/0x1cb0 blkdev_ioctl+0x365/0x6d0 __x64_sys_ioctl+0x18f/0x210 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f64b0fdc8d7 Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 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:00007f64ae551f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f64b1026970 RCX: 00007f64b0fdc8d7 RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005 RBP: 0000000000000005 R08: 0000000000000000 R09: ffffffffffffffff R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 0000000000000004 R14: 0000000020000218 R15: 0000000000000001 CPU: 0 UID: 0 PID: 5481 Comm: syz-executor.3 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_failslab+0xc2/0x120 __kmalloc_cache_noprof+0x80/0x780 nl80211_dump_survey+0xe5/0xaf0 genl_dumpit+0x125/0x220 netlink_dump+0x51a/0x1200 __netlink_dump_start+0x6c5/0x980 genl_family_rcv_msg_dumpit+0x1b6/0x2b0 genl_rcv_msg+0x447/0x7e0 netlink_rcv_skb+0x147/0x430 genl_rcv+0x28/0x40 netlink_unicast+0x5a7/0x870 netlink_sendmsg+0x8a3/0xd80 ____sys_sendmsg+0xa34/0xbf0 ___sys_sendmsg+0x10f/0x1b0 __sys_sendmsg+0x150/0x200 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff7fecb0b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007ff7fc226188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff7fedc3f60 RCX: 00007ff7fecb0b19 RDX: 0000000000000000 RSI: 0000000020001a00 RDI: 0000000000000004 RBP: 00007ff7fc2261d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff69b7ecef R14: 00007ff7fc226300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: e9 84 2e 04 00 jmpq 0x42e89 5: 0f 1f 40 00 nopl 0x0(%rax) 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 48 83 f9 40 cmp $0x40,%rcx 1d: 73 44 jae 0x63 1f: 83 f9 08 cmp $0x8,%ecx 22: 73 25 jae 0x49 24: 85 c9 test %ecx,%ecx 26: 74 0f je 0x37 28: 8a 06 mov (%rsi),%al * 2a: 88 07 mov %al,(%rdi) <-- trapping instruction 2c: 48 ff c7 inc %rdi 2f: 48 ff c6 inc %rsi 32: 48 ff c9 dec %rcx 35: 75 f1 jne 0x28 37: e9 4d 2e 04 00 jmpq 0x42e89 3c: 66 data16 3d: 66 data16 3e: 2e cs 3f: 0f .byte 0xf