bcachefs (loop1): snapshots_read... done bcachefs (loop1): journal_replay... done bcachefs (loop1): resume_logged_ops... done bcachefs (loop1): going read-write bcachefs (loop1): done starting filesystem BUG: kernel NULL pointer dereference, address: 000000000000003b #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 255f6067 P4D 255f6067 PUD 269c7067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 PID: 8074 Comm: syz-executor.1 Not tainted 6.9.0-syzkaller-11919-g5f16eb0549ab #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:___slab_alloc+0x27a/0x1870 mm/slub.c:3609 Code: 0b 49 83 7f 28 00 0f 85 de 07 00 00 4d 89 77 28 49 83 7c 24 10 00 0f 85 45 06 00 00 4d 8b 7c 24 18 4d 85 ff 0f 84 d2 06 00 00 <49> 8b 47 10 83 bd 68 ff ff ff ff 49 89 44 24 18 74 20 49 8b 07 48 RSP: 0018:ffffc90003f36f20 EFLAGS: 00010006 RAX: 0000000000000000 RBX: 0000000000000206 RCX: ffffffff816bbf0e RDX: 0000000000000001 RSI: ffffffff81e19948 RDI: 0000000000000000 RBP: ffffc90003f37000 R08: 0000000000000000 R09: fffffbfff283fe50 R10: ffffffff941ff287 R11: 0000000000000001 R12: ffffe8ffad149e40 R13: ffff888025322dc0 R14: ffff888020924880 R15: 000000000000002b FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5ef9b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000000000003b CR3: 000000001dcd2000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3756 __slab_alloc_node mm/slub.c:3809 [inline] slab_alloc_node mm/slub.c:3988 [inline] kmem_cache_alloc_noprof+0x2ae/0x2f0 mm/slub.c:4007 mempool_alloc_noprof+0x176/0x390 mm/mempool.c:402 bio_alloc_bioset+0x480/0x8b0 block/bio.c:554 bch2_writepage_io_alloc fs/bcachefs/fs-io-buffered.c:476 [inline] __bch2_writepage+0x107e/0x2500 fs/bcachefs/fs-io-buffered.c:610 write_cache_pages+0xb0/0x130 mm/page-writeback.c:2591 bch2_writepages+0x11f/0x200 fs/bcachefs/fs-io-buffered.c:650 do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2634 filemap_fdatawrite_wbc mm/filemap.c:397 [inline] filemap_fdatawrite_wbc+0x148/0x1c0 mm/filemap.c:387 __filemap_fdatawrite_range+0xba/0x100 mm/filemap.c:430 file_write_and_wait_range+0xd0/0x140 mm/filemap.c:788 bch2_fsync+0xa1/0x2c0 fs/bcachefs/fs-io.c:197 vfs_fsync_range+0x141/0x230 fs/sync.c:188 generic_write_sync include/linux/fs.h:2794 [inline] bch2_buffered_write fs/bcachefs/fs-io-buffered.c:1128 [inline] bch2_write_iter+0x756/0x3180 fs/bcachefs/fs-io-buffered.c:1136 do_iter_readv_writev+0x504/0x780 fs/read_write.c:741 vfs_writev+0x36f/0xde0 fs/read_write.c:971 do_pwritev+0x1b2/0x260 fs/read_write.c:1072 __do_compat_sys_pwritev2 fs/read_write.c:1218 [inline] __se_compat_sys_pwritev2 fs/read_write.c:1210 [inline] __ia32_compat_sys_pwritev2+0x121/0x1b0 fs/read_write.c:1210 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7307579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5ef95ac EFLAGS: 00000292 ORIG_RAX: 000000000000017b RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000200015c0 RDX: 0000000000000007 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: 000000000000003b ---[ end trace 0000000000000000 ]--- RIP: 0010:___slab_alloc+0x27a/0x1870 mm/slub.c:3609 Code: 0b 49 83 7f 28 00 0f 85 de 07 00 00 4d 89 77 28 49 83 7c 24 10 00 0f 85 45 06 00 00 4d 8b 7c 24 18 4d 85 ff 0f 84 d2 06 00 00 <49> 8b 47 10 83 bd 68 ff ff ff ff 49 89 44 24 18 74 20 49 8b 07 48 RSP: 0018:ffffc90003f36f20 EFLAGS: 00010006 RAX: 0000000000000000 RBX: 0000000000000206 RCX: ffffffff816bbf0e RDX: 0000000000000001 RSI: ffffffff81e19948 RDI: 0000000000000000 RBP: ffffc90003f37000 R08: 0000000000000000 R09: fffffbfff283fe50 R10: ffffffff941ff287 R11: 0000000000000001 R12: ffffe8ffad149e40 R13: ffff888025322dc0 R14: ffff888020924880 R15: 000000000000002b FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5ef9b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000000000003b CR3: 000000001dcd2000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 49 83 7f 28 00 cmpq $0x0,0x28(%r15) 5: 0f 85 de 07 00 00 jne 0x7e9 b: 4d 89 77 28 mov %r14,0x28(%r15) f: 49 83 7c 24 10 00 cmpq $0x0,0x10(%r12) 15: 0f 85 45 06 00 00 jne 0x660 1b: 4d 8b 7c 24 18 mov 0x18(%r12),%r15 20: 4d 85 ff test %r15,%r15 23: 0f 84 d2 06 00 00 je 0x6fb * 29: 49 8b 47 10 mov 0x10(%r15),%rax <-- trapping instruction 2d: 83 bd 68 ff ff ff ff cmpl $0xffffffff,-0x98(%rbp) 34: 49 89 44 24 18 mov %rax,0x18(%r12) 39: 74 20 je 0x5b 3b: 49 8b 07 mov (%r15),%rax 3e: 48 rex.W