panic: kernel diagnostic assertion "bp->b_data != NULL" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 235
Starting stack trace...
panic(ffffffff82931932) at panic+0x159 sys/kern/subr_prf.c:229
__assert(ffffffff828e4822,ffffffff828f53df,eb,ffffffff82875040) at __assert+0x29 sys/kern/subr_prf.c:157
buf_unmap(fffffd807d40ee40) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd80675be9e8) at buf_map+0x1c6 sys/kern/vfs_biomem.c:117
buf_get(fffffd806bb64120,ca,4000) at buf_get+0x42f sys/kern/vfs_bio.c:1175
getblk(fffffd806bb64120,ca,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1044
bread_cluster(fffffd806bb64120,ca,4000,ffff8000329e6ff8) at bread_cluster+0x59 bio_doread sys/kern/vfs_bio.c:430 [inline]
bread_cluster(fffffd806bb64120,ca,4000,ffff8000329e6ff8) at bread_cluster+0x59 sys/kern/vfs_bio.c:593
ffs_read(ffff8000329e7060) at ffs_read+0x2c3
VOP_READ(fffffd806bb64120,ffff8000329e70f8,0,fffffd807f7d7888) at VOP_READ+0xc3 sys/kern/vfs_vops.c:227
uvn_io(fffffd806bb63ac8,ffff8000329e7208,1,202,0) at uvn_io+0x3b0
uvn_get(fffffd806bb63ac8,328000,ffff8000329e72c8,ffff8000329e7298,0,1,ffc8577e3244da93,328000) at uvn_get+0x1e9 sys/uvm/uvm_vnode.c:1110
uvm_fault_lower(ffff8000329e7430,ffff8000329e7468,ffff8000329e73b0,2) at uvm_fault_lower+0x4a3 sys/uvm/uvm_fault.c:1284
uvm_fault(fffffd806ad89c38,f0373bab000,2,1) at uvm_fault+0x22a sys/uvm/uvm_fault.c:637
uvm_fault_wire(fffffd806ad89c38,f0373883000,f0373c83000,1) at uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1602
uvm_map_pageable_wire(fffffd806ad89c38,fffffd806bc7a4b8,0,153,ffffffff82784510,0) at uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2159
sys_mlockall(ffff80002a6f7230,ffff8000329e7740,ffff8000329e7690) at sys_mlockall+0x61 sys/uvm/uvm_mmap.c:899
syscall(ffff8000329e7740) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf02d089f490, count: 239
End of stack trace.