panic in ZFS: VERIFY3U(BP_GET_BIRTH(bp), ==, BP_GET_BIRTH(&found->le_bp)) failed (15427394 == 15427393)

From: Alexander Leidinger <Alexander_at_Leidinger.net>
Date: Wed, 13 Aug 2025 09:46:35 UTC
Hi,

I get this panic with -current as of 2025-08-11-154054 (CEST):
---snip---
(kgdb) #0  __curthread () at 
/space/system/usr_src/sys/amd64/include/pcpu_aux.h:57
         td = <optimized out>
#1  doadump (textdump=textdump@entry=1)
     at /space/system/usr_src/sys/kern/kern_shutdown.c:399
         error = 0
         coredump = <optimized out>
#2  0xffffffff8053b305 in kern_reboot (howto=260)
     at /space/system/usr_src/sys/kern/kern_shutdown.c:519
         once = 0
         __pc = 0x0
#3  0xffffffff8053b837 in vpanic (
     fmt=0xffffffff816d11f0 "VERIFY3U(BP_GET_BIRTH(bp), ==, 
BP_GET_BIRTH(&found->le_bp)) failed (%llu == %llu)\n", 
ap=ap@entry=0xfffffe0420634b30)
     at /space/system/usr_src/sys/kern/kern_shutdown.c:974
         buf = "VERIFY3U(BP_GET_BIRTH(bp), ==, 
BP_GET_BIRTH(&found->le_bp)) failed (15427394 == 15427393)\n", '\000' 
<repeats 165 times>
         __pc = 0x0
         __pc = 0x0
         __pc = 0x0
         other_cpus = {__bits = {16777213, 0 <repeats 15 times>}}
         td = 0xfffff801228ee780
         bootopt = <unavailable>
         newpanic = <optimized out>
#4  0xffffffff8140650a in spl_panic (file=<optimized out>,
     func=<optimized out>, line=<unavailable>, fmt=<unavailable>)
     at 
/space/system/usr_src/sys/contrib/openzfs/module/os/freebsd/spl/spl_misc.c:100
         ap = {{gp_offset = 48, fp_offset = 48,
             overflow_arg_area = 0xfffffe0420634b60,
             reg_save_area = 0xfffffe0420634b00}}
#5  0xffffffff814d4615 in dsl_livelist_iterate (arg=<optimized out>,
     bp=<optimized out>, bp_freed=0, tx=<optimized out>)
     at 
/space/system/usr_src/sys/contrib/openzfs/module/zfs/dsl_deadlist.c:1052
         _verify3_left = <unavailable>
         _verify3_right = <unavailable>
         node = {le_bp = {blk_dva = {{dva_word = {24, 5140063200}}, {
                 dva_word = {0, 0}}, {dva_word = {0, 0}}},
             blk_prop = 9228727766583607296, blk_prop2 = 0, blk_pad = 0,
             blk_birth_word = {15427393, 15427394}, blk_fill = 0, 
blk_cksum = {
               zc_word = {0, 0, 0, 0}}}, le_refcnt = 9, le_node = 
{avl_child = {
               0xfffffe0420634c30, 0xffffffff81492e2a <dmu_buf_hold+58>},
             avl_pcb = 18446735324294374176}}
         lia = <optimized out>
         avl = 0xfffffe0420634d88
         to_free = <optimized out>
         t = <optimized out>
         found = <optimized out>
#6  0xffffffff8146a402 in bpobj_iterate_blkptrs (
     bpi=bpi@entry=0xfffff80eca95e3c0,
     func=func@entry=0xffffffff814d4320 <dsl_livelist_iterate>,
     arg=arg@entry=0xfffffe0420634da8, start=start@entry=0, 
tx=tx@entry=0x0,
     free=free@entry=0)
     at /space/system/usr_src/sys/contrib/openzfs/module/zfs/bpobj.c:325
         bp = 0xfffffe07b50a4880
         blkoff = <optimized out>
         bparray = <unavailable>
         offset = 6272
         bp_freed = 0
         dbuf = 0xfffff806386e5bc0
         err = <optimized out>
         freed = 0
         comp_freed = 0
         uncomp_freed = 0
         bpo = 0xfffff80ade376320
         i = 49
         pe = <optimized out>
         ps = 0
         pb = 0
#7  0xffffffff814699c1 in bpobj_iterate_impl (
     initial_bpo=initial_bpo@entry=0xfffff80ade376320,
     func=0xffffffff814d4320 <dsl_livelist_iterate>,
     arg=arg@entry=0xfffffe0420634da8, tx=tx@entry=0x0, 
free=free@entry=0,
     bpobj_size=bpobj_size@entry=0x0)
     at /space/system/usr_src/sys/contrib/openzfs/module/zfs/bpobj.c:401
         bpo = 0xfffff80ade376320
         stack = {list_offset = 40, list_head = {
             list_next = 0xfffff80eca95e3e8, list_prev = 
0xfffff80eca95e3e8}}
         err = <optimized out>
         bpi = 0xfffff80eca95e3c0
#8  0xffffffff8146a0d2 in bpobj_iterate_nofree (bpo=<unavailable>,
     bpo@entry=0xfffff80ade376320, func=<unavailable>, arg=<unavailable>,
     arg@entry=0xfffffe0420634da8, bpobj_size=<unavailable>,
     bpobj_size@entry=0x0)
     at /space/system/usr_src/sys/contrib/openzfs/module/zfs/bpobj.c:567
No locals.
#9  0xffffffff814d422c in dsl_process_sub_livelist (
     bpobj=bpobj@entry=0xfffff80ade376320,
     to_free=to_free@entry=0xfffffe0420634e08, 
t=t@entry=0xfffff803e479e300,
     size=size@entry=0x0)
     at 
/space/system/usr_src/sys/contrib/openzfs/module/zfs/dsl_deadlist.c:1106
         avl = {avl_root = 0xfffff811914e9488,
           avl_compar = 0xffffffff814d42e0 <livelist_compare>,
           avl_offset = 136, avl_numnodes = 25}
         arg = {avl = 0xfffffe0420634d88, to_free = 0xfffffe0420634e08,
           t = 0xfffff803e479e300}
         cookie = 0xfffff80ade376300
         err = <optimized out>
         le = <optimized out>
#10 0xffffffff81536a52 in spa_livelist_delete_cb 
(arg=0xfffffe022835d000,
     z=0xfffff803e479e300)
     at /space/system/usr_src/sys/contrib/openzfs/module/zfs/spa.c:3223
         to_free = {bpl_lock = {lock_object = {
               lo_name = 0xffffffff816f57e9 <.L.str+1> "bpl->bpl_lock",
               lo_flags = 577830912, lo_data = 0, lo_witness = 0x0},
             sx_lock = 1}, bpl_list = {list_offset = 128, list_head = {
               list_next = 0xfffff80a5a71e580, list_prev = 
0xfffff8101a903680}}}
         ll = 0xfffff8053f3e1000
         dle = 0xfffff80ade376300
         err = <optimized out>
         count = 1
         spa = 0xfffffe022835d000
         ll_obj = <optimized out>
         mos = <optimized out>
         zap_obj = 14665
#11 0xffffffff8164c16f in zthr_procedure (arg=0xfffff803e479e300)
     at /space/system/usr_src/sys/contrib/openzfs/module/zfs/zthr.c:246
         t = 0xfffff803e479e300
#12 0xffffffff804ee0f7 in fork_exit (
     callout=0xffffffff8164c0c0 <zthr_procedure>, arg=0xfffff803e479e300,
     frame=0xfffffe0420634f40)
     at /space/system/usr_src/sys/kern/kern_fork.c:1153
         __pc = 0x0
         __pc = 0x0
         td = 0xfffff801228ee780
         p = 0xfffffe021d808558
         dtd = <optimized out>

Tracing command "zfskern", '\000' <repeats 12 times> pid 6 tid 101414 
(CPU 1)
#0  __curthread () at 
/space/system/usr_src/sys/amd64/include/pcpu_aux.h:57
#1  doadump (textdump=textdump@entry=1)
     at /space/system/usr_src/sys/kern/kern_shutdown.c:399
#2  0xffffffff8053b305 in kern_reboot (howto=260)
     at /space/system/usr_src/sys/kern/kern_shutdown.c:519
#3  0xffffffff8053b837 in vpanic (
     fmt=0xffffffff816d11f0 "VERIFY3U(BP_GET_BIRTH(bp), ==, 
BP_GET_BIRTH(&found->le_bp)) failed (%llu == %llu)\n", 
ap=ap@entry=0xfffffe0420634b30)
     at /space/system/usr_src/sys/kern/kern_shutdown.c:974
#4  0xffffffff8140650a in spl_panic (file=<optimized out>,
     func=<optimized out>, line=<unavailable>, fmt=<unavailable>)
     at 
/space/system/usr_src/sys/contrib/openzfs/module/os/freebsd/spl/spl_misc.c:100
#5  0xffffffff814d4615 in dsl_livelist_iterate (arg=<optimized out>,
     bp=<optimized out>, bp_freed=0, tx=<optimized out>)
     at 
/space/system/usr_src/sys/contrib/openzfs/module/zfs/dsl_deadlist.c:1052
#6  0xffffffff8146a402 in bpobj_iterate_blkptrs (
     bpi=bpi@entry=0xfffff80eca95e3c0,
     func=func@entry=0xffffffff814d4320 <dsl_livelist_iterate>,
     arg=arg@entry=0xfffffe0420634da8, start=start@entry=0, 
tx=tx@entry=0x0,
     free=free@entry=0)
     at /space/system/usr_src/sys/contrib/openzfs/module/zfs/bpobj.c:325
#7  0xffffffff814699c1 in bpobj_iterate_impl (
     initial_bpo=initial_bpo@entry=0xfffff80ade376320,
     func=0xffffffff814d4320 <dsl_livelist_iterate>,
     arg=arg@entry=0xfffffe0420634da8, tx=tx@entry=0x0, 
free=free@entry=0,
     bpobj_size=bpobj_size@entry=0x0)
     at /space/system/usr_src/sys/contrib/openzfs/module/zfs/bpobj.c:401
#8  0xffffffff8146a0d2 in bpobj_iterate_nofree (bpo=<unavailable>,
     bpo@entry=0xfffff80ade376320, func=<unavailable>, arg=<unavailable>,
     arg@entry=0xfffffe0420634da8, bpobj_size=<unavailable>,
     bpobj_size@entry=0x0)
     at /space/system/usr_src/sys/contrib/openzfs/module/zfs/bpobj.c:567
#9  0xffffffff814d422c in dsl_process_sub_livelist (
     bpobj=bpobj@entry=0xfffff80ade376320,
     to_free=to_free@entry=0xfffffe0420634e08, 
t=t@entry=0xfffff803e479e300,
     size=size@entry=0x0)
     at 
/space/system/usr_src/sys/contrib/openzfs/module/zfs/dsl_deadlist.c:1106
#10 0xffffffff81536a52 in spa_livelist_delete_cb 
(arg=0xfffffe022835d000,
     z=0xfffff803e479e300)
     at /space/system/usr_src/sys/contrib/openzfs/module/zfs/spa.c:3223
#11 0xffffffff8164c16f in zthr_procedure (arg=0xfffff803e479e300)
     at /space/system/usr_src/sys/contrib/openzfs/module/zfs/zthr.c:246
#12 0xffffffff804ee0f7 in fork_exit (
     callout=0xffffffff8164c0c0 <zthr_procedure>, arg=0xfffff803e479e300,
     frame=0xfffffe0420634f40)
     at /space/system/usr_src/sys/kern/kern_fork.c:1153
#13 <signal handler called>
---snip---

Bye,
Alexander.

-- 
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http://www.FreeBSD.org    netchild@FreeBSD.org  : PGP 0x8F31830F9F2772BF