ci2 starts bisection 2023-04-28 06:49:51.124455555 +0000 UTC m=+11509.831773952 bisecting fixing commit since 8020ae3c051d1c9ec7b7a872e226f9720547649b building syzkaller on 7939252e4ddf50bbb9912069a40d32f6c83c4f8e ensuring issue is reproducible on original commit 8020ae3c051d1c9ec7b7a872e226f9720547649b testing commit 8020ae3c051d1c9ec7b7a872e226f9720547649b gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 4191e3d3e9f94ff1fd364fd4063d58bd5463a0c2beb6a1dd239874382cb1ee53 run #0: crashed: kernel BUG in end_page_writeback run #1: crashed: kernel BUG in end_page_writeback run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK reproducer seems to be flaky testing current HEAD f48aeeaaa64c628519273f6007a745cf55b68d95 testing commit f48aeeaaa64c628519273f6007a745cf55b68d95 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 7f456106fa0a0a495778b8e14c44b5db730657cbdd4d54a47296116bf72793d7 run #0: crashed: kernel BUG in end_page_writeback run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK Reproducer flagged being flaky revisions tested: 2, total time: 48m6.668799018s (build: 23m34.660709949s, test: 24m1.015960124s) the crash still happens on HEAD commit msg: Linux 5.15.109 crash: kernel BUG in end_page_writeback ------------[ cut here ]------------ kernel BUG at mm/filemap.c:1604! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9543 Comm: syz-executor.0 Not tainted 5.15.109-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 RIP: 0010:end_page_writeback+0x345/0x480 mm/filemap.c:1604 Code: b4 1b 00 e9 61 ff ff ff f6 c3 01 0f 85 0b 01 00 00 4c 89 fb e9 06 01 00 00 4c 89 e7 48 c7 c6 00 4d 92 89 e8 fd 8a 0b 00 0f 0b <0f> 0b 4c 89 ff 48 c7 c6 c0 47 92 89 e8 ea 8a 0b 00 0f 0b 4c 89 ff RSP: 0018:ffffc90005cc6ee8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffea000064e234 RCX: ffffc90005cc6d03 RDX: 0000000000000002 RSI: ffffffff898ac0e0 RDI: ffffffff89d73040 RBP: 00fff00000002014 R08: dffffc0000000000 R09: fffffbfff199f7e6 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea000064e200 R13: 1ffffd40000c9c41 R14: ffffea000064e208 R15: ffffea000064e200 FS: 00007f2ddcc43700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002006a000 CR3: 0000000077ff3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: f2fs_write_end_io+0x551/0xb70 fs/f2fs/data.c:347 f2fs_inplace_write_data+0x463/0x850 fs/f2fs/segment.c:3636 f2fs_do_write_data_page+0x54c/0xfc0 fs/f2fs/data.c:2670 f2fs_write_single_data_page+0x928/0x13c0 fs/f2fs/data.c:2830 f2fs_write_cache_pages fs/f2fs/data.c:3079 [inline] __f2fs_write_data_pages fs/f2fs/data.c:3230 [inline] f2fs_write_data_pages+0x14bf/0x24c0 fs/f2fs/data.c:3257 do_writepages+0x406/0x680 mm/page-writeback.c:2364 filemap_fdatawrite_wbc+0x17d/0x1d0 mm/filemap.c:400 __filemap_fdatawrite_range mm/filemap.c:433 [inline] filemap_write_and_wait_range+0x186/0x230 mm/filemap.c:704 __generic_file_write_iter+0x30d/0x400 mm/filemap.c:3889 f2fs_file_write_iter+0x51e/0x920 fs/f2fs/file.c:4336 do_iter_readv_writev+0x43a/0x600 do_iter_write+0x193/0x600 fs/read_write.c:855 vfs_writev fs/read_write.c:928 [inline] do_pwritev+0x1d7/0x300 fs/read_write.c:1025 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f2de49340f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2ddcc43168 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f2de4a54050 RCX: 00007f2de49340f9 RDX: 0000000000000001 RSI: 0000000020000680 RDI: 0000000000000004 RBP: 00007f2de498fb39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000006000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc8c74cc3f R14: 00007f2ddcc43300 R15: 0000000000022000 Modules linked in: ---[ end trace 6f5b225c2d2ce372 ]--- RIP: 0010:end_page_writeback+0x345/0x480 mm/filemap.c:1604 Code: b4 1b 00 e9 61 ff ff ff f6 c3 01 0f 85 0b 01 00 00 4c 89 fb e9 06 01 00 00 4c 89 e7 48 c7 c6 00 4d 92 89 e8 fd 8a 0b 00 0f 0b <0f> 0b 4c 89 ff 48 c7 c6 c0 47 92 89 e8 ea 8a 0b 00 0f 0b 4c 89 ff RSP: 0018:ffffc90005cc6ee8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffea000064e234 RCX: ffffc90005cc6d03 RDX: 0000000000000002 RSI: ffffffff898ac0e0 RDI: ffffffff89d73040 RBP: 00fff00000002014 R08: dffffc0000000000 R09: fffffbfff199f7e6 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea000064e200 R13: 1ffffd40000c9c41 R14: ffffea000064e208 R15: ffffea000064e200 FS: 00007f2ddcc43700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002006a000 CR3: 0000000077ff3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400