input: syz1 as /devices/virtual/input/input5
loop0: detected capacity change from 0 to 32768
UFO tlock:0xffffc900015381b0
BUG at fs/jfs/jfs_txnmgr.c:662 assert(last)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:662!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:txLock+0x1b92/0x1cc0 fs/jfs/jfs_txnmgr.c:662
Code: e9 6a f8 ff ff e8 ee 75 6b fe 48 c7 c7 60 fb ea 8b 48 c7 c6 59 f7 ea 8b ba 96 02 00 00 48 c7 c1 80 fc ea 8b e8 1f a0 ce fd 90 <0f> 0b e8 c7 75 6b fe 48 c7 c7 40 fd ea 8b e8 0b a0 ce fd 48 c7 c7
RSP: 0018:ffffc90009e8de40 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: e228513095015f00
RDX: ffffc90020802000 RSI: 0000000000076939 RDI: 000000000007693a
RBP: ffffc90009e8df68 R08: ffffc90009e8dbc7 R09: 1ffff920013d1b78
R10: dffffc0000000000 R11: fffff520013d1b79 R12: 1ffff920002a7000
R13: ffffc90001538000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fed278906c0(0000) GS:ffff88808ccea000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe4f993f04 CR3: 0000000042e69000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 diWrite+0x444/0x1f40 fs/jfs/jfs_imap.c:654
 txCommit+0x869/0x5410 fs/jfs/jfs_txnmgr.c:1256
 jfs_commit_inode+0x2ef/0x530 fs/jfs/inode.c:114
 extAlloc+0xc95/0x1020 fs/jfs/jfs_extent.c:177
 jfs_get_block+0x358/0xad0 fs/jfs/inode.c:254
 __block_write_begin_int+0x6c6/0x1910 fs/buffer.c:2145
 block_write_begin+0x8d/0x120 fs/buffer.c:2256
 jfs_write_begin+0x35/0x80 fs/jfs/inode.c:306
 generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4314
 generic_file_write_iter+0x14a/0x680 mm/filemap.c:4457
 __kernel_write_iter+0x41e/0x880 fs/read_write.c:619
 dump_emit_page fs/coredump.c:1298 [inline]
 dump_user_range+0xb89/0x12d0 fs/coredump.c:1372
 elf_core_dump+0x34c2/0x3ad0 fs/binfmt_elf.c:2111
 coredump_write+0x1219/0x1950 fs/coredump.c:1049
 do_coredump fs/coredump.c:1126 [inline]
 vfs_coredump+0x369e/0x4270 fs/coredump.c:1200
 get_signal+0x1107/0x1330 kernel/signal.c:3019
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:75 [inline]
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
 irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
 irqentry_exit+0x176/0x620 kernel/entry/common.c:196
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7fed26979e98
Code: 00 00 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 89 f8 62 a1 fd 00 ef c0 25 ff 0f 00 00 3d e0 0f 00 00 0f 87 28 01 00 00 <62> f1 7d 20 74 07 c5 fb 93 c0 85 c0 74 1a 0f bc c0 c3 66 0f 1f 44
RSP: 002b:00007fed2788fe58 EFLAGS: 00010283
RAX: 0000000000000000 RBX: 00007fed2788fee0 RCX: 0000000000000000
RDX: 00000000000001ff RSI: 0000200000000240 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000200000000240 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000240
R13: 00007fed2788fea0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txLock+0x1b92/0x1cc0 fs/jfs/jfs_txnmgr.c:662
Code: e9 6a f8 ff ff e8 ee 75 6b fe 48 c7 c7 60 fb ea 8b 48 c7 c6 59 f7 ea 8b ba 96 02 00 00 48 c7 c1 80 fc ea 8b e8 1f a0 ce fd 90 <0f> 0b e8 c7 75 6b fe 48 c7 c7 40 fd ea 8b e8 0b a0 ce fd 48 c7 c7
RSP: 0018:ffffc90009e8de40 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: e228513095015f00
RDX: ffffc90020802000 RSI: 0000000000076939 RDI: 000000000007693a
RBP: ffffc90009e8df68 R08: ffffc90009e8dbc7 R09: 1ffff920013d1b78
R10: dffffc0000000000 R11: fffff520013d1b79 R12: 1ffff920002a7000
R13: ffffc90001538000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fed278906c0(0000) GS:ffff88808ccea000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe4f993f04 CR3: 0000000042e69000 CR4: 0000000000352ef0