------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 2 PID: 13155 at lib/refcount.c:31 refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31 Modules linked in: CPU: 2 PID: 13155 Comm: syz-executor.1 Not tainted 6.10.0-rc3-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31 Code: 8b e8 b7 8f d1 fc 90 0f 0b 90 90 e9 c3 fe ff ff e8 88 0e 0f fd c6 05 43 c8 4c 0b 01 90 48 c7 c7 00 66 8f 8b e8 94 8f d1 fc 90 <0f> 0b 90 90 e9 a0 fe ff ff 48 89 ef e8 f2 41 6c fd e9 44 fe ff ff RSP: 0018:ffffc900039ef9f0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000ca11000 RDX: 0000000000040000 RSI: ffffffff81511296 RDI: 0000000000000001 RBP: ffff888026b74664 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000005 R12: 1ffff9200073df43 R13: ffff888026b74664 R14: 0000000000000000 R15: ffff888026b74000 FS: 0000000000000000(0000) GS:ffff88802c200000(0063) knlGS:00000000f5e4eb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000005b65c000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __refcount_dec include/linux/refcount.h:336 [inline] refcount_dec include/linux/refcount.h:351 [inline] ref_tracker_free+0x710/0x820 lib/ref_tracker.c:236 netdev_tracker_free include/linux/netdevice.h:4058 [inline] netdev_put include/linux/netdevice.h:4075 [inline] netdev_put include/linux/netdevice.h:4071 [inline] ax25_release+0x33f/0xa40 net/ax25/af_ax25.c:1069 __sock_release+0xb0/0x270 net/socket.c:659 sock_close+0x1c/0x30 net/socket.c:1421 __fput+0x408/0xbb0 fs/file_table.c:422 task_work_run+0x14e/0x250 kernel/task_work.c:180 get_signal+0x1d3/0x2670 kernel/signal.c:2681 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218 __do_fast_syscall_32+0x80/0x120 arch/x86/entry/common.c:389 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf725c579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5e4e5ac EFLAGS: 00000292 ORIG_RAX: 000000000000016e RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000101 RDX: 0000000000000019 RSI: 0000000020000240 RDI: 0000000000000010 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi