syzbot


pool: cpu free list modified: mbufpl (4)

Status: upstream: reported on 2024/04/15 20:42
Reported-by: syzbot+daecb1649911bafa9776@syzkaller.appspotmail.com
First crash: 16d, last: 16d
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd pool: cpu free list modified: mbufpl syz 15863 1366d 1653d 3/3 fixed on 2020/08/05 06:16
openbsd pool: cpu free list modified: mbufpl (2) 1 677d 677d 0/3 auto-obsoleted due to no activity on 2022/09/22 19:57
openbsd pool: cpu free list modified: mbufpl (3) 1 191d 191d 0/3 auto-obsoleted due to no activity on 2024/01/22 11:03

Sample crash report:
panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd8066255200+16 0x0!=0x9d08f969c9bdb95d
Stopped at      db_enter+0x1c:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
* 11477   5205      0  0x1a000002  0x4000000    1  syz-fuzzer
 122505  94007      0     0x14000      0x200    0  softnet0
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8284c656) at panic+0x17b sys/kern/subr_prf.c:198
pool_cache_get(ffffffff82e2e178) at pool_cache_get+0x302
pool_get(ffffffff82e2e178,1) at pool_get+0x96 sys/kern/subr_pool.c:573
m_gethdr(1,1) at m_gethdr+0x67 sys/kern/uipc_mbuf.c:276
m_getuio(ffff80002a209fa0,0,43af,ffff80002a20a0f8) at m_getuio+0xa4 sys/kern/uipc_socket.c:706
sosend(ffff800010fd4fa0,0,ffff80002a20a0f8,0,0,80) at sosend+0x524 sys/kern/uipc_socket.c:660
dofilewritev(ffff80002a1aece8,6,ffff80002a20a0f8,0,ffff80002a20a1b0) at dofilewritev+0x1a9 sys/kern/sys_generic.c:375
sys_write(ffff80002a1aece8,ffff80002a20a260,ffff80002a20a1b0) at sys_write+0x87 sys/kern/sys_generic.c:295
syscall(ffff80002a20a260) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff80002a20a260) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2bfdb9590, count: 4
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Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/15 20:41 openbsd 7019ae976ad9 459f4b00 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore pool: cpu free list modified: mbufpl
* Struck through repros no longer work on HEAD.