syzbot


pool: free list modified: pdppl (5)

Status: upstream: reported on 2025/11/23 22:29
Reported-by: syzbot+e5295f4c534d9833a54b@syzkaller.appspotmail.com
First crash: 12d, last: 12d
Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd pool: free list modified: pdppl (3) -1 1 1141d 1141d 0/3 auto-obsoleted due to no activity on 2023/01/20 06:59
openbsd pool: free list modified: pdppl -1 1 2226d 2226d 0/3 closed as invalid on 2019/11/03 08:39
openbsd pool: free list modified: pdppl (4) -1 8 409d 586d 0/3 auto-obsoleted due to no activity on 2025/01/21 00:49
openbsd pool: free list modified: pdppl (2) -1 1 1458d 1458d 0/3 auto-closed as invalid on 2022/03/09 08:14

Sample crash report:
panic: pool_do_get: pdppl free list modified: page 0xfffffd8066c2f000; item addr 0xfffffd8066c2f000; offset 0x0=0xb62453c14d9b8e88 != 0xb62453c14d9b8eca
Starting stack trace...
panic(ffffffff833acdc7) at panic+0x1ba sys/kern/subr_prf.c:229
pool_do_get(ffffffff8394b438,1,ffff80003c939578) at pool_do_get+0x574 sys/kern/subr_pool.c:743
pool_get(ffffffff8394b438,1) at pool_get+0x11a sys/kern/subr_pool.c:-1
pmap_create() at pmap_create+0x18c sys/arch/amd64/amd64/pmap.c:1391
uvmspace_fork(ffff8000ffffba98) at uvmspace_fork+0x7f uvmspace_init sys/uvm/uvm_map.c:-1 [inline]
uvmspace_fork(ffff8000ffffba98) at uvmspace_fork+0x7f uvmspace_alloc sys/uvm/uvm_map.c:3247 [inline]
uvmspace_fork(ffff8000ffffba98) at uvmspace_fork+0x7f sys/uvm/uvm_map.c:3732
process_new(ffff80002a854d30,ffff8000ffffba98,1) at process_new+0x558 sys/kern/kern_fork.c:281
fork1(ffff80002a7bca78,1,ffffffff81305ee0,0,ffff80003c9397f0,0) at fork1+0x3f2 sys/kern/kern_fork.c:-1
syscall(ffff80003c9398a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c9398a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7a2944857d10, count: 248
End of stack trace.
syncing disks...














Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/23 22:28 openbsd f4c39256adbf 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main pool: free list modified: pdppl
* Struck through repros no longer work on HEAD.