UBSAN: shift-out-of-bounds in e100_eeprom_load

Status: upstream: reported C repro on 2026/08/06 15:36
Subsystems: intel-wired-lan
[Documentation on labels]
Reported-by: syzbot+e0abb1d45ac291ebebeb@syzkaller.appspotmail.com
First crash: 3d06h, last: 3d01h
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
c357b18c assessment-security 💥 UBSAN: shift-out-of-bounds in e100_eeprom_load 2026/08/05 00:06 2026/08/05 00:06 2026/08/05 00:06 d4abbeac
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[PATCH] e100: prevent shift out-of-bounds in e100_eeprom_load 1 (1) 2026/08/07 14:56
[syzbot] [intel-wired-lan?] UBSAN: shift-out-of-bounds in e100_eeprom_load 0 (2) 2026/08/07 13:46
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/08/07 13:46 25m pavankumaryalagada@gmail.com patch upstream OK log

Sample crash report:
e1000e 0000:00:02.0 eth1: removed PHC
e1000e 0000:00:02.0 eth1: NIC Link is Down
------------[ cut here ]------------
UBSAN: shift-out-of-bounds in drivers/net/ethernet/intel/e100.c:768:21
shift exponent 65529 is too large for 32-bit type 'int'
CPU: 0 UID: 0 PID: 5934 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 ubsan_epilogue+0xa/0x30 lib/ubsan.c:233
 __ubsan_handle_shift_out_of_bounds+0x279/0x2a0 lib/ubsan.c:494
 e100_eeprom_load.cold+0x55/0x9e drivers/net/ethernet/intel/e100.c:768
 e100_probe+0xd07/0x1ab0 drivers/net/ethernet/intel/e100.c:2921
 local_pci_probe+0xdd/0x1b0 drivers/pci/pci-driver.c:332
 pci_call_probe+0x176/0x800 drivers/pci/pci-driver.c:394
 __pci_device_probe drivers/pci/pci-driver.c:455 [inline]
 pci_device_probe+0x1cd/0x370 drivers/pci/pci-driver.c:489
 call_driver_probe drivers/base/dd.c:628 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:706
 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
 device_driver_attach+0xd1/0x220 drivers/base/dd.c:1203
 bind_store+0xf4/0x190 drivers/base/bus.c:267
 drv_attr_store+0x74/0xb0 drivers/base/bus.c:125
 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6ac/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f60d819e019
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc13c52ae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f60d8425fa0 RCX: 00007f60d819e019
RDX: 000000000000000c RSI: 0000200000000280 RDI: 0000000000000005
RBP: 00007f60d823500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f60d8425fac R14: 00007f60d8425fa0 R15: 00007f60d8425fa0
 </TASK>
---[ end trace ]---

Crashes (24):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/04 18:30 upstream 848acc8ffe1b 3c5eaa21 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 16:47 upstream 848acc8ffe1b 3c5eaa21 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 15:38 upstream 848acc8ffe1b 3c5eaa21 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 14:42 upstream 848acc8ffe1b 3c5eaa21 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 18:31 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 18:30 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 18:02 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 17:44 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 14:56 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 13:36 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 13:18 upstream 848acc8ffe1b 3c5eaa21 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 13:18 upstream 848acc8ffe1b 3c5eaa21 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 13:14 upstream 848acc8ffe1b 3c5eaa21 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 13:14 upstream 848acc8ffe1b 3c5eaa21 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 17:26 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 16:55 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 16:49 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 16:48 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 16:45 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 16:44 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 15:17 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 15:16 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 15:15 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 UBSAN: shift-out-of-bounds in e100_eeprom_load
2026/08/04 15:14 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 UBSAN: shift-out-of-bounds in e100_eeprom_load
* Struck through repros no longer work on HEAD.