ci2 starts bisection 2023-10-26 11:24:11.522953008 +0000 UTC m=+43.183943122 bisecting fixing commit since 3b29299e5f604550faf3eff811d6cd60b4c6cae6 building syzkaller on f325deb023e4e2fb9197004be1b3da738680429c ensuring issue is reproducible on original commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d7e557e40243c5553050e052d5f20bbd07583d8a7daa208a28e868f47dfdcce7 run #0: crashed: kernel BUG in ext4_writepages run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: kernel BUG in ext4_writepages run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: INFO: rcu detected stall in corrupted run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in corrupted run #9: crashed: INFO: rcu detected stall in corrupted run #10: crashed: INFO: rcu detected stall in corrupted run #11: crashed: INFO: rcu detected stall in corrupted run #12: crashed: INFO: rcu detected stall in corrupted run #13: crashed: INFO: rcu detected stall in corrupted run #14: crashed: kernel BUG in ext4_writepages run #15: crashed: kernel BUG in ext4_writepages run #16: crashed: kernel BUG in ext4_writepages run #17: crashed: kernel BUG in ext4_writepages run #18: crashed: kernel BUG in ext4_writepages run #19: crashed: kernel BUG in ext4_writepages representative crash: INFO: rcu detected stall in corrupted, types: [HANG BUG] check whether we can drop unnecessary instrumentation disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 346143b505928c64a060109010418dd8c5af149a4d10e3e5dbe615abddaf5e98 run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: kernel BUG in ext4_writepages run #7: crashed: kernel BUG in ext4_writepages run #8: crashed: kernel BUG in ext4_writepages run #9: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG BUG] the bug reproduces without the instrumentation disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed kconfig minimization: base=3820 full=7521 leaves diff=1987 split chunks (needed=false): <1987> split chunk #0 of len 1987 into 5 parts testing without sub-chunk 1/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2d5002ec6c970e013fa8fe0fe394630308efcdf9eec908efe9b71f3b86b5cec8 run #0: crashed: kernel BUG in ext4_writepages run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: kernel BUG in ext4_writepages run #6: crashed: kernel BUG in ext4_writepages run #7: crashed: kernel BUG in ext4_writepages run #8: crashed: kernel BUG in ext4_writepages run #9: OK representative crash: kernel BUG in ext4_writepages, types: [BUG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 70ead8ae2984cf681587b5f65e7539686e76b6b88e517e913d63b5240e3c4f13 run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: kernel BUG in ext4_writepages run #6: crashed: kernel BUG in ext4_writepages run #7: crashed: kernel BUG in ext4_writepages run #8: crashed: kernel BUG in ext4_writepages run #9: crashed: kernel BUG in ext4_writepages representative crash: INFO: rcu detected stall in corrupted, types: [HANG BUG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a992284426b5978d903856bce8ad7ff827d26d09a6f9253a993daf281b17c0b2 run #0: crashed: kernel BUG in ext4_writepages run #1: crashed: kernel BUG in ext4_writepages run #2: crashed: kernel BUG in ext4_writepages run #3: crashed: kernel BUG in ext4_writepages run #4: crashed: kernel BUG in ext4_writepages run #5: crashed: kernel BUG in ext4_writepages run #6: OK run #7: OK run #8: OK run #9: OK representative crash: kernel BUG in ext4_writepages, types: [BUG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 84cdea4e5d031bfadc1cfcfb788f903d2456ab4b0b2a242123eda0e49138ae5c run #0: crashed: kernel BUG in ext4_writepages run #1: crashed: kernel BUG in ext4_writepages run #2: crashed: kernel BUG in ext4_writepages run #3: crashed: kernel BUG in ext4_writepages run #4: crashed: kernel BUG in ext4_writepages run #5: crashed: kernel BUG in ext4_writepages run #6: crashed: kernel BUG in ext4_writepages run #7: OK run #8: OK run #9: OK representative crash: kernel BUG in ext4_writepages, types: [BUG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN KASAN], they are not needed testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9113666a5ade7313d1b452c0c01a5f7fb7f89fe7508d5517f5a1dd35c540fc1f run #0: crashed: kernel BUG in ext4_writepages run #1: crashed: kernel BUG in ext4_writepages run #2: crashed: kernel BUG in ext4_writepages run #3: crashed: kernel BUG in ext4_writepages run #4: crashed: kernel BUG in ext4_writepages run #5: crashed: kernel BUG in ext4_writepages run #6: crashed: kernel BUG in ext4_writepages run #7: OK run #8: OK run #9: OK representative crash: kernel BUG in ext4_writepages, types: [BUG] the chunk can be dropped disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing current HEAD 32c9cdbe383c153af23cfa1df0a352b97ab3df7a testing commit 32c9cdbe383c153af23cfa1df0a352b97ab3df7a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5ae1264e8f69778b638fa46f2300deac8592810b2f52327d097002dd49e25a7a run #0: crashed: kernel BUG in ext4_writepages run #1: crashed: kernel BUG in ext4_writepages run #2: crashed: kernel BUG in ext4_writepages run #3: crashed: kernel BUG in ext4_writepages run #4: crashed: kernel BUG in ext4_writepages run #5: crashed: kernel BUG in ext4_writepages run #6: crashed: kernel BUG in ext4_writepages run #7: crashed: kernel BUG in ext4_writepages run #8: crashed: kernel BUG in ext4_writepages run #9: OK representative crash: kernel BUG in ext4_writepages, types: [BUG] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 2h27m58.892401525s (build: 39m29.953275768s, test: 1h25m28.957862515s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.60 crash: kernel BUG in ext4_writepages ------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2736! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 0 PID: 3771 Comm: kworker/u4:8 Not tainted 6.1.60-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Workqueue: writeback wb_workfn (flush-7:0) RIP: 0010:ext4_writepages+0x1232/0x1240 fs/ext4/inode.c:2735 Code: 24 08 48 8b 54 24 10 89 d9 e8 3a 50 02 00 65 ff 0d 6b b4 c9 7e 49 89 ee 0f 85 0a fe ff ff 0f 1f 44 00 00 e9 00 fe ff ff 0f 0b <0f> 0b 0f 0b e9 27 ff ff ff 0f 0b eb 9c 90 48 83 7e 28 00 74 14 48 RSP: 0018:ffffc9000108b938 EFLAGS: 00010207 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000001 RDX: 0000000000000001 RSI: ffffffff82306b69 RDI: 0000000000000000 RBP: ffff888114eef450 R08: 0000000000000000 R09: ffffffff8137ea4f R10: 0000000000000000 R11: 0000001000000000 R12: ffffc9000108bb20 R13: ffff888114eef678 R14: ffff88810c28f000 R15: ffffc9000108bc40 FS: 0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc35d009000 CR3: 0000000105f11000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_writepages+0xc5/0x210 mm/page-writeback.c:2469 __writeback_single_inode+0x65/0x490 fs/fs-writeback.c:1595 writeback_sb_inodes+0x3a4/0x6f0 fs/fs-writeback.c:1886 wb_writeback+0x18d/0x470 fs/fs-writeback.c:2060 wb_do_writeback fs/fs-writeback.c:2203 [inline] wb_workfn+0x137/0x560 fs/fs-writeback.c:2243 process_one_work+0x25c/0x4d0 kernel/workqueue.c:2292 worker_thread+0x240/0x3e0 kernel/workqueue.c:2439 kthread+0xdd/0x100 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_writepages+0x1232/0x1240 fs/ext4/inode.c:2735 Code: 24 08 48 8b 54 24 10 89 d9 e8 3a 50 02 00 65 ff 0d 6b b4 c9 7e 49 89 ee 0f 85 0a fe ff ff 0f 1f 44 00 00 e9 00 fe ff ff 0f 0b <0f> 0b 0f 0b e9 27 ff ff ff 0f 0b eb 9c 90 48 83 7e 28 00 74 14 48 RSP: 0018:ffffc9000108b938 EFLAGS: 00010207 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000001 RDX: 0000000000000001 RSI: ffffffff82306b69 RDI: 0000000000000000 RBP: ffff888114eef450 R08: 0000000000000000 R09: ffffffff8137ea4f R10: 0000000000000000 R11: 0000001000000000 R12: ffffc9000108bb20 R13: ffff888114eef678 R14: ffff88810c28f000 R15: ffffc9000108bc40 FS: 0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc35d009000 CR3: 0000000002621000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400