------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2618! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 8097 Comm: syz-executor1 Not tainted 4.9.135+ #116 task: ffff8801c85f5f00 task.stack: ffff8801c3510000 RIP: 0010:[] [] mpage_prepare_extent_to_map+0x719/0x9a0 fs/ext4/inode.c:2618 RSP: 0018:ffff8801c35172d8 EFLAGS: 00010216 RAX: 0000000000040000 RBX: ffffea0006735500 RCX: ffffc90000d39000 RDX: 0000000000027c73 RSI: ffffffff816c4ee9 RDI: ffffea0006735510 RBP: ffff8801c3517498 R08: ffff8801c85f67b0 R09: 0000000000024bb0 R10: ffffffffffffffe8 R11: 0000000000000000 R12: 0000000000000002 R13: 000000000000008a R14: dffffc0000000000 R15: ffff8801c3517600 FS: 00007f68fa213700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004ee5d8 CR3: 00000001c8aa4000 CR4: 00000000001606b0 Stack: 1ffff100386a2e6a ffff8801c3517370 ffff8801c3517608 ffff8801c3517610 00000002c85f67b0 000000000007fffe ffff8801d41bac38 0000000e0000000c 7fffffffffffffef ffff8801c35173b0 ffff8801c3517618 ffffed00386a2ec1 Call Trace: [] ext4_writepages+0xeee/0x2e00 fs/ext4/inode.c:2780 [] do_writepages+0xef/0x1d0 mm/page-writeback.c:2331 [] __filemap_fdatawrite_range+0x1a9/0x250 mm/filemap.c:390 [] filemap_write_and_wait_range+0x59/0xb0 mm/filemap.c:578 [] generic_file_read_iter+0x776/0x1a80 mm/filemap.c:1957 [] generic_file_splice_read+0x2bd/0x4e0 fs/splice.c:309 [] do_splice_to+0x10c/0x170 fs/splice.c:899 [] splice_direct_to_actor+0x23f/0x7e0 fs/splice.c:971 [] do_splice_direct+0x1a3/0x270 fs/splice.c:1080 [] do_sendfile+0x4f0/0xc30 fs/read_write.c:1393 [] SYSC_sendfile64 fs/read_write.c:1448 [inline] [] SyS_sendfile64+0xd1/0x160 fs/read_write.c:1440 [] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: fc ff ff 48 89 95 b0 fe ff ff e8 13 66 c5 ff 48 8b 95 b0 fe ff ff 48 8d 42 ff e9 6f ff ff ff e8 fe 65 c5 ff 0f 0b e8 f7 65 c5 ff <0f> 0b 31 c0 89 85 b0 fe ff ff e8 e8 65 c5 ff 8b 85 18 ff ff ff RIP [] mpage_prepare_extent_to_map+0x719/0x9a0 fs/ext4/inode.c:2618 RSP audit_printk_skb: 2250 callbacks suppressed audit: type=1400 audit(1541942283.899:8435): avc: denied { net_admin } for pid=2106 comm="syz-executor3" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1541942283.899:8436): avc: denied { sys_admin } for pid=2109 comm="syz-executor5" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1541942283.899:8437): avc: denied { sys_admin } for pid=2109 comm="syz-executor5" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1541942283.919:8438): avc: denied { sys_admin } for pid=2109 comm="syz-executor5" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1541942283.919:8439): avc: denied { sys_admin } for pid=2109 comm="syz-executor5" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1541942283.949:8441): avc: denied { dac_override } for pid=8111 comm="syz-executor4" capability=1 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1541942283.979:8442): avc: denied { net_admin } for pid=2109 comm="syz-executor5" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1541942283.979:8443): avc: denied { net_admin } for pid=2109 comm="syz-executor5" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1541942284.009:8444): avc: denied { dac_override } for pid=8082 comm="syz-executor1" capability=1 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1541942283.919:8440): avc: denied { net_admin } for pid=2105 comm="syz-executor0" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 ---[ end trace 9e6c80bd79013b6f ]---