kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 10277 Comm: syz-executor.5 Not tainted 4.14.302-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 task: ffff888048bdc0c0 task.stack: ffff88804eb38000 RIP: 0010:lbmStartIO+0x14a/0x490 fs/jfs/jfs_logmgr.c:2143 RSP: 0018:ffff88804eb3fca8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888091bcaf00 RCX: 0000000000000003 RDX: 000000000000001c RSI: ffffffff8305e6eb RDI: 00000000000000e0 RBP: ffff8880a2c777c0 R08: 0000000000000001 R09: ffff8880a2c777c0 R10: ffff8880a2c77847 R11: 0000000000000000 R12: ffff88809f226900 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fd5fc40d700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd5fdf24829 CR3: 00000000b43ce000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lbmWrite+0x254/0x380 fs/jfs/jfs_logmgr.c:2092 lmGCwrite+0x3d4/0x4d0 fs/jfs/jfs_logmgr.c:806 jfs_flush_journal.part.0+0x3e6/0x600 fs/jfs/jfs_logmgr.c:1570 jfs_flush_journal+0x23/0x30 fs/jfs/jfs_logmgr.c:1537 jfs_fsync+0x18b/0x1e0 fs/jfs/file.c:45 vfs_fsync_range+0x103/0x260 fs/sync.c:196 vfs_fsync fs/sync.c:210 [inline] do_fsync fs/sync.c:220 [inline] SYSC_fsync fs/sync.c:228 [inline] SyS_fsync+0x3a/0x80 fs/sync.c:226 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fd5fde9b0d9 RSP: 002b:00007fd5fc40d168 EFLAGS: 00000246 ORIG_RAX: 000000000000004a RAX: ffffffffffffffda RBX: 00007fd5fdfbaf80 RCX: 00007fd5fde9b0d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fd5fdef6ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd19297c4f R14: 00007fd5fc40d300 R15: 0000000000022000 Code: 48 c1 ea 03 80 3c 02 00 0f 85 06 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6c 24 20 49 8d bd e0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d5 02 00 00 4d 8b ad e0 00 00 00 4d 39 ee 74 RIP: lbmStartIO+0x14a/0x490 fs/jfs/jfs_logmgr.c:2143 RSP: ffff88804eb3fca8 ---[ end trace 68b9fd7a8f47a74d ]--- ---------------- Code disassembly (best guess): 0: 48 c1 ea 03 shr $0x3,%rdx 4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 8: 0f 85 06 03 00 00 jne 0x314 e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 15: fc ff df 18: 4d 8b 6c 24 20 mov 0x20(%r12),%r13 1d: 49 8d bd e0 00 00 00 lea 0xe0(%r13),%rdi 24: 48 89 fa mov %rdi,%rdx 27: 48 c1 ea 03 shr $0x3,%rdx * 2b: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2f: 0f 85 d5 02 00 00 jne 0x30a 35: 4d 8b ad e0 00 00 00 mov 0xe0(%r13),%r13 3c: 4d 39 ee cmp %r13,%r14 3f: 74 .byte 0x74