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BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all

Status: upstream: reported on 2024/06/04 09:15
Reported-by: syzbot+8613615616552a1b83b8@syzkaller.appspotmail.com
First crash: 170d, last: 26d
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all 3 126d 185d 0/3 auto-obsoleted due to no activity on 2024/10/26 12:47
linux-5.15 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all (2) 1 23d 23d 0/3 upstream: reported on 2024/10/29 09:51
upstream KASAN: slab-use-after-free Read in bq_xmit_all bpf net C done 29 112d 125d 27/28 fixed on 2024/08/23 02:59

Sample crash report:
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Mem abort info:
  ESR = 0x0000000086000006
  EC = 0x21: IABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
user pgtable: 4k pages, 48-bit VAs, pgdp=00000001331ea000
[0000000000000000] pgd=0800000112ea2003, p4d=0800000112ea2003, pud=080000012ae0c003, pmd=0000000000000000
Internal error: Oops: 0000000086000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 5474 Comm: syz.2.197 Not tainted 6.1.114-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : 0x0
lr : bond_xdp_xmit+0x34c/0x588 drivers/net/bonding/bond_main.c:5574
sp : ffff800021b47360
x29: ffff800021b474c0 x28: 1ffff00004368e8a x27: ffff0000f07c4000
x26: ffff0000f5818140 x25: 1ffff00004368e8e x24: ffff800021b47440
x23: ffff800021b47420 x22: dfff800000000000 x21: fffffbffeff915e8
x20: ffff8000136b4bd8 x19: 0000000000000000 x18: 1ffff00004368e84
x17: 0000000000000000 x16: ffff8000084f7858 x15: 0000000000000002
x14: 0000000000000001 x13: ffff0000c6f61bc0 x12: 0000000000040000
x11: 000000000000026e x10: ffff80002365a000 x9 : ffff80000ca9bed4
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000001
x2 : ffff800021b47420 x1 : 0000000000000001 x0 : ffff0000f07c4000
Call trace:
 0x0
 bq_xmit_all+0xb48/0xffc kernel/bpf/devmap.c:389
 __dev_flush+0xc8/0x1a0 kernel/bpf/devmap.c:419
 xdp_do_flush+0x14/0x28 net/core/filter.c:4182
 tun_build_skb drivers/net/tun.c:1723 [inline]
 tun_get_user+0x2858/0x386c drivers/net/tun.c:1818
 tun_chr_write_iter+0xfc/0x204 drivers/net/tun.c:2044
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x610/0x91c fs/read_write.c:584
 ksys_write+0x15c/0x26c fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: bad PC value
---[ end trace 0000000000000000 ]---

Crashes (19):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/10/25 20:47 linux-6.1.y 7ec6f9fa3d97 045e728d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/10/23 05:55 linux-6.1.y 7ec6f9fa3d97 15fa2979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/09/05 04:47 linux-6.1.y 699506173494 dfbe2ed4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/09/05 04:46 linux-6.1.y 699506173494 dfbe2ed4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/09/03 07:27 linux-6.1.y 311d8503ef9f 8045124c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/08/30 15:14 linux-6.1.y 311d8503ef9f ee2602b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/08/23 21:13 linux-6.1.y ee5e09825b81 d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/08/23 21:13 linux-6.1.y ee5e09825b81 d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/08/23 08:55 linux-6.1.y ee5e09825b81 ce8a9099 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/08/23 08:55 linux-6.1.y ee5e09825b81 ce8a9099 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/08/17 09:50 linux-6.1.y 117ac406ba90 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/08/06 18:21 linux-6.1.y 48d525b0e463 1ef9fe42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/08/05 10:36 linux-6.1.y 48d525b0e463 e35c337f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/08/03 15:13 linux-6.1.y 48d525b0e463 1786a2a8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/07/09 18:51 linux-6.1.y 7753af06eebf 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/06/15 06:24 linux-6.1.y ae9f2a70d69e f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/06/11 17:25 linux-6.1.y 88690811da69 b7d9eb04 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/06/05 21:23 linux-6.1.y 88690811da69 5aa1a7c9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
2024/06/04 09:14 linux-6.1.y 88690811da69 a1feae05 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel NULL pointer dereference in bq_xmit_all
* Struck through repros no longer work on HEAD.