ci starts bisection 2023-03-24 14:58:53.579561061 +0000 UTC m=+810.054997110 bisecting fixing commit since feb9c5e19e913b53cb536a7aa7c9f20107bb51ec building syzkaller on 8d7b3b6714cdbd8094249db5679c08af0dbee351 ensuring issue is reproducible on original commit feb9c5e19e913b53cb536a7aa7c9f20107bb51ec testing commit feb9c5e19e913b53cb536a7aa7c9f20107bb51ec gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: ebb97c8287eeb4e3e6051f6e6048daf18831a3304ccc4900fed6050fa61327c7 all runs: crashed: general protection fault in scatterwalk_copychunks testing current HEAD 1e760fa3596e8c7f08412712c168288b79670d78 testing commit 1e760fa3596e8c7f08412712c168288b79670d78 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 72775a835f37ba17ca481c7828a8a63e5636630ebffe120bdaa718566faa8399 all runs: crashed: general protection fault in scatterwalk_copychunks revisions tested: 2, total time: 34m49.295486697s (build: 20m9.765015947s, test: 13m12.162520397s) the crash still happens on HEAD commit msg: Merge tag 'gfs2-v6.3-rc3-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 crash: general protection fault in scatterwalk_copychunks general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 33 Comm: kworker/u4:2 Not tainted 6.3.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Workqueue: pencrypt_parallel padata_parallel_worker RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:63 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:83 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:72 [inline] RIP: 0010:scatterwalk_copychunks+0x2b9/0x570 crypto/scatterwalk.c:50 Code: ff ff 4c 89 ff e8 f7 e3 2d 00 49 89 c7 48 8b 44 24 10 80 38 00 0f 85 30 02 00 00 49 8d 77 08 4d 89 7d 00 48 89 f0 48 c1 e8 03 <42> 0f b6 04 30 84 c0 74 08 3c 03 0f 8e f9 01 00 00 48 8b 54 24 08 RSP: 0018:ffffc90000caf6d0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 1ffff1100506ca4b RSI: 0000000000000008 RDI: ffff888028365258 RBP: ffff88807b5c7440 R08: 0000000000000001 R09: ffffffff8f5bab67 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: ffffc90000caf8c8 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f62b3fa0000 CR3: 000000001f979000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skcipher_next_slow crypto/skcipher.c:264 [inline] skcipher_walk_next+0x620/0x1760 crypto/skcipher.c:349 skcipher_walk_aead_common+0x7e6/0xc40 crypto/skcipher.c:525 gcmaes_crypt_by_sg+0x27e/0x600 arch/x86/crypto/aesni-intel_glue.c:725 gcmaes_encrypt+0xcd/0x200 arch/x86/crypto/aesni-intel_glue.c:789 generic_gcmaes_encrypt+0x128/0x190 arch/x86/crypto/aesni-intel_glue.c:1170 pcrypt_aead_enc+0x11/0x60 crypto/pcrypt.c:83 padata_parallel_worker+0x56/0xa0 kernel/padata.c:152 process_one_work+0x865/0x13f0 kernel/workqueue.c:2390 worker_thread+0x598/0xec0 kernel/workqueue.c:2537 kthread+0x294/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:63 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:83 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:72 [inline] RIP: 0010:scatterwalk_copychunks+0x2b9/0x570 crypto/scatterwalk.c:50 Code: ff ff 4c 89 ff e8 f7 e3 2d 00 49 89 c7 48 8b 44 24 10 80 38 00 0f 85 30 02 00 00 49 8d 77 08 4d 89 7d 00 48 89 f0 48 c1 e8 03 <42> 0f b6 04 30 84 c0 74 08 3c 03 0f 8e f9 01 00 00 48 8b 54 24 08 RSP: 0018:ffffc90000caf6d0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 1ffff1100506ca4b RSI: 0000000000000008 RDI: ffff888028365258 RBP: ffff88807b5c7440 R08: 0000000000000001 R09: ffffffff8f5bab67 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: ffffc90000caf8c8 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f62b3fa0000 CR3: 000000001f979000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff 4c 89 ff decl -0x1(%rcx,%rcx,4) 4: e8 f7 e3 2d 00 callq 0x2de400 9: 49 89 c7 mov %rax,%r15 c: 48 8b 44 24 10 mov 0x10(%rsp),%rax 11: 80 38 00 cmpb $0x0,(%rax) 14: 0f 85 30 02 00 00 jne 0x24a 1a: 49 8d 77 08 lea 0x8(%r15),%rsi 1e: 4d 89 7d 00 mov %r15,0x0(%r13) 22: 48 89 f0 mov %rsi,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 08 je 0x3a 32: 3c 03 cmp $0x3,%al 34: 0f 8e f9 01 00 00 jle 0x233 3a: 48 8b 54 24 08 mov 0x8(%rsp),%rdx