panic: kernel diagnostic assertion "ISSET(bp->b_flags, B_BC)" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/vfs_bio.c", line 1683
Starting stack trace...
panic(ffffffff8295e173) at panic+0x16f sys/kern/subr_prf.c:229
__assert(ffffffff82912ef3,ffffffff828ac496,693,ffffffff828fadfd) at __assert+0x29 sys/kern/subr_prf.c:157
bufcache_take(fffffd8067993a00) at bufcache_take+0x254 sys/kern/vfs_bio.c:1684
getblk(fffffd80669ff468,0,4000,0,ffffffffffffffff) at getblk+0x17e sys/kern/vfs_bio.c:1037
bread(fffffd80669ff468,0,4000,ffff80002bcab838) at bread+0x3e bio_doread sys/kern/vfs_bio.c:430 [inline]
bread(fffffd80669ff468,0,4000,ffff80002bcab838) at bread+0x3e sys/kern/vfs_bio.c:475
ffs2_balloc(fffffd806e540888,40,5c,fffffd807f7d35b0,1,ffff80002bcab838) at ffs2_balloc+0x635 sys/ufs/ffs/ffs_balloc.c:501
ffs_write(ffff80002bcab8c0) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345
VOP_WRITE(fffffd80669ff468,ffff80002bcab978,3,fffffd807f7d35b0) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff80002cb33738,fffffd80669ff468,fffffd807f7d35b0,ffff80002bcaba48,ffff80002bcaba20) at ktrwriteraw+0x16b sys/kern/kern_ktrace.c:682
ktrstruct(ffff80002cb33738,ffffffff8287955b,ffff80002bcabb40,10) at ktrstruct+0x169 ktrwrite2 sys/kern/kern_ktrace.c:645 [inline]
ktrstruct(ffff80002cb33738,ffffffff8287955b,ffff80002bcabb40,10) at ktrstruct+0x169 sys/kern/kern_ktrace.c:308
sys_nanosleep(ffff80002cb33738,ffff80002bcabc80,ffff80002bcabbd0) at sys_nanosleep+0xc1 sys/kern/kern_time.c:288
syscall(ffff80002bcabc80) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff80002bcabc80) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76a59d2d9810, count: 244
End of stack trace.