------------[ cut here ]------------ WARNING: CPU: 1 PID: 4830 at fs/buffer.c:640 __set_page_dirty.constprop.0+0x14c/0x1c0 fs/buffer.c:640() Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 4830 Comm: syz-executor.2 Not tainted 4.4.174+ #4 0000000000000000 94739b79d92fc741 ffff8800b9317540 ffffffff81aad1a1 0000000000000000 ffffffff82835ee0 ffffffff828a31c0 0000000000000280 ffffffff8154387c ffff8800b9317620 ffffffff813a48c2 0000000041b58ab3 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [] panic+0x1b9/0x37b kernel/panic.c:112 [] warn_slowpath_common kernel/panic.c:455 [inline] [] warn_slowpath_common.cold+0x20/0x20 kernel/panic.c:435 [] warn_slowpath_null+0x2a/0x30 kernel/panic.c:492 [] __set_page_dirty.constprop.0+0x14c/0x1c0 fs/buffer.c:640 [] __set_page_dirty_buffers+0x108/0x1b0 fs/buffer.c:701 [] set_page_dirty+0xbc/0x150 mm/page-writeback.c:2564 [] block_page_mkwrite+0x1df/0x270 fs/buffer.c:2455 [] ext4_page_mkwrite+0xb80/0xef0 fs/ext4/inode.c:5483 [] do_page_mkwrite+0x1d2/0x360 mm/memory.c:2057 [] wp_page_shared mm/memory.c:2327 [inline] [] do_wp_page+0xb5c/0x1340 mm/memory.c:2431 [] handle_pte_fault mm/memory.c:3362 [inline] [] __handle_mm_fault mm/memory.c:3474 [inline] [] handle_mm_fault+0x1614/0x3140 mm/memory.c:3503 [] __do_page_fault+0x28e/0x7f0 arch/x86/mm/fault.c:1243 [] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1306 [] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:1064 [] SYSC_sendmmsg net/socket.c:2090 [inline] [] SyS_sendmmsg+0x35/0x60 net/socket.c:2085 [] entry_SYSCALL_64_fastpath+0x1e/0x9a Kernel Offset: disabled Rebooting in 86400 seconds..