... Log Wrap ... Log Wrap ... Log Wrap ...
BUG at fs/jfs/jfs_dmap.c:3036 assert(bitno < 32)
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kernel BUG at fs/jfs/jfs_dmap.c:3036!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4564 Comm: syz.0.28 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3036
lr : dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3036
sp : ffff8000218073d0
x29: ffff8000218073d0 x28: ffff0000dad71021 x27: dfff800000000000
x26: 0000000000000000 x25: ffff0000dad71804 x24: 0000000000000000
x23: ffff8000158ec6d0 x22: 0000000000000020 x21: 0000000000000001
x20: 00000000ffffffff x19: 0000000000000000 x18: 1fffe00033e8417e
x17: ffff80001532d000 x16: ffff800011b3e320 x15: ffff00019f420bfc
x14: 0000000000000001 x13: 1ffff00004300de0 x12: 0000000000000000
x11: ff00800008315148 x10: 0000000000000000 x9 : 0e308967242afa00
x8 : 0e308967242afa00 x7 : ffff80000825ab3c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff80000a8d09fc
x2 : ffff00019f420d10 x1 : 0000000100000000 x0 : 0000000000000030
Call trace:
 dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3036
 dbAllocDmapLev+0x140/0x348 fs/jfs/jfs_dmap.c:1985
 dbAllocCtl+0x128/0x8c0 fs/jfs/jfs_dmap.c:1825
 dbAllocAG+0x1bc/0xe24 fs/jfs/jfs_dmap.c:1353
 dbAlloc+0x42c/0x9dc fs/jfs/jfs_dmap.c:877
 dtSplitUp fs/jfs/jfs_dtree.c:982 [inline]
 dtInsert+0x870/0x5710 fs/jfs/jfs_dtree.c:871
 jfs_mkdir+0x5ec/0x8fc fs/jfs/namei.c:270
 vfs_mkdir+0x314/0x4d8 fs/namei.c:4114
 do_mkdirat+0x1b8/0x3ec fs/namei.c:4139
 __do_sys_mkdirat fs/namei.c:4154 [inline]
 __se_sys_mkdirat fs/namei.c:4152 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: 90043a63 91378063 52817b82 979d7341 (d4210000) 
---[ end trace 0000000000000000 ]---