kernel BUG in binder_inc_ref_for_node

Status: upstream: reported C repro on 2026/08/24 18:42
Reported-by: syzbot+4c25498cf4f5436c1c39@syzkaller.appspotmail.com
First crash: 27d, last: 12m
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in binder_inc_ref_for_node kernel -1 syz, C error 16721 770d 799d 28/29 fixed on 2024/10/03 15:25

Sample crash report:
------------[ cut here ]------------
kernel BUG at drivers/android/binder.c:1330!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 305 Comm: syz-executor127 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:binder_get_ref_for_node_olocked drivers/android/binder.c:1330 [inline]
RIP: 0010:binder_inc_ref_for_node+0x10b3/0x11c0 drivers/android/binder.c:1642
Code: ff ff 48 89 df 41 89 f5 41 89 d7 41 89 ce e8 84 04 11 fe 44 89 f1 4c 8b 75 c8 44 89 fa 44 89 ee e9 a3 fe ff ff e8 1d 95 d1 fd <0f> 0b 65 8b 05 ac ee 69 7c 41 89 c5 c1 e8 06 48 8d 3c c5 a8 51 e9
RSP: 0018:ffffc900009a7370 EFLAGS: 00010293
RAX: ffffffff83982293 RBX: 0000000000000000 RCX: ffff888124508000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900009a7410 R08: ffff888107ddee3f R09: ffff888107ddee30
R10: dffffc0000000000 R11: ffffed1020fbbdc8 R12: dffffc0000000000
R13: ffff888107ddef28 R14: ffff888107ddef10 R15: 0000000000000000
FS:  000055556d6383c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000062b5d8 CR3: 0000000122746000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 binder_thread_write+0x1497/0x6fe0 drivers/android/binder.c:4239
 binder_ioctl_write_read+0x203/0x6700 drivers/android/binder.c:5579
 binder_ioctl+0x36c/0x1df0 drivers/android/binder.c:5905
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0x121/0x1a0 fs/ioctl.c:860
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860
 x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fbb6a4c3e09
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 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 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffda234bc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbb6a4c3e09
RDX: 00002000000003c0 RSI: 00000000c0306201 RDI: 0000000000000003
RBP: 00000000000f4240 R08: 000055556d639670 R09: 000055556d639670
R10: 000055556d639670 R11: 0000000000000246 R12: 00007fbb6a52de0e
R13: 00007fbb6a52c0a7 R14: 00007ffda234bc70 R15: 00007ffda234bc80
 </TASK>
Modules linked in:
---[ end trace c210fb6709c0be6b ]---
RIP: 0010:binder_get_ref_for_node_olocked drivers/android/binder.c:1330 [inline]
RIP: 0010:binder_inc_ref_for_node+0x10b3/0x11c0 drivers/android/binder.c:1642
Code: ff ff 48 89 df 41 89 f5 41 89 d7 41 89 ce e8 84 04 11 fe 44 89 f1 4c 8b 75 c8 44 89 fa 44 89 ee e9 a3 fe ff ff e8 1d 95 d1 fd <0f> 0b 65 8b 05 ac ee 69 7c 41 89 c5 c1 e8 06 48 8d 3c c5 a8 51 e9
RSP: 0018:ffffc900009a7370 EFLAGS: 00010293
RAX: ffffffff83982293 RBX: 0000000000000000 RCX: ffff888124508000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900009a7410 R08: ffff888107ddee3f R09: ffff888107ddee30
R10: dffffc0000000000 R11: ffffed1020fbbdc8 R12: dffffc0000000000
R13: ffff888107ddef28 R14: ffff888107ddef10 R15: 0000000000000000
FS:  000055556d6383c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000062b5d8 CR3: 0000000122746000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (3422):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/24 18:33 android13-5.15-lts 2d18a4de3623 b55bd4c3 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/08/24 19:02 android13-5.15-lts 2d18a4de3623 b55bd4c3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/08/24 18:04 android13-5.15-lts 2d18a4de3623 b55bd4c3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/21 08:25 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/21 08:16 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/21 01:02 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/20 19:44 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/20 19:30 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/20 19:26 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/20 10:10 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/20 09:10 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/20 07:11 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/20 03:20 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/20 02:30 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/20 01:01 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 23:29 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 22:00 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 20:20 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 19:21 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 18:52 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 18:29 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 17:52 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 14:44 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 14:43 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 08:31 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 07:31 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 05:19 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 03:33 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 03:31 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/19 01:11 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/18 22:59 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/18 22:07 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/18 14:00 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/18 13:49 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/18 12:59 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/18 10:12 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/18 10:11 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/18 08:50 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/18 08:49 android13-5.15-lts 5bfe2b8c1439 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/18 03:37 android13-5.15-lts 5bfe2b8c1439 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/18 00:50 android13-5.15-lts 5bfe2b8c1439 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/18 00:09 android13-5.15-lts 5bfe2b8c1439 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/17 23:08 android13-5.15-lts 5bfe2b8c1439 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/17 22:47 android13-5.15-lts 5bfe2b8c1439 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
2026/09/17 21:26 android13-5.15-lts 5bfe2b8c1439 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 kernel BUG in binder_inc_ref_for_node
* Struck through repros no longer work on HEAD.