general protection fault in bfs_get

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[syzbot] [bfs?] general protection fault in bfs_get_block	0 (1)	2023/02/07 17:51

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[syzbot] [bfs?] general protection fault in bfs_get_block

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2023/02/07 17:51

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	general protection fault in bfs_get_block (3) bfs	C			9	18d	90d	0/28	upstream: reported C repro on 2024/10/30 00:43
linux-6.1	general protection fault in bfs_get_block origin:upstream	C		error	1	145d	667d	0/3	upstream: reported C repro on 2023/04/02 00:46
upstream	general protection fault in bfs_get_block (2) bfs	C	error	done	2	411d	430d	25/28	fixed on 2024/01/30 15:47

general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] CPU: 1 PID: 21540 Comm: syz-executor.2 Not tainted 6.3.0-rc2-syzkaller-00047-g6015b1aca1a2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:bfs_move_block fs/bfs/file.c:42 [inline] RIP: 0010:bfs_move_blocks fs/bfs/file.c:56 [inline] RIP: 0010:bfs_get_block+0x35a/0xdd0 fs/bfs/file.c:125 Code: 48 89 f8 48 c1 e8 03 80 3c 08 00 0f 85 64 08 00 00 49 8d 7e 28 48 8b 55 20 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 2d 08 00 00 48 8d 7d 28 4d 8b 4e 28 48 b9 00 00 RSP: 0018:ffffc900035cef68 EFLAGS: 00010206 RAX: 0000000000000005 RBX: 0000000000000021 RCX: dffffc0000000000 RDX: 0000000000000200 RSI: ffffffff81f20dff RDI: 0000000000000028 RBP: ffff88807124f950 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000fffffffa R11: 0000000000000000 R12: ffff88804b574000 R13: ffffed10096ae82c R14: 0000000000000000 R15: 0000000000000024 FS: 00007f08ede92700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555591e848 CR3: 000000002d709000 CR4: 00000000003506e0 DR0: 00000000ffff070c DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: <TASK> __block_write_begin_int+0x3bd/0x14b0 fs/buffer.c:2034 __block_write_begin fs/buffer.c:2084 [inline] block_write_begin+0xb9/0x4d0 fs/buffer.c:2145 bfs_write_begin+0x31/0xd0 fs/bfs/file.c:177 generic_perform_write+0x256/0x570 mm/filemap.c:3926 __generic_file_write_iter+0x2ae/0x500 mm/filemap.c:4054 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4086 __kernel_write_iter+0x262/0x7a0 fs/read_write.c:517 __kernel_write+0xcb/0x110 fs/read_write.c:537 __dump_emit fs/coredump.c:811 [inline] dump_emit+0x21d/0x340 fs/coredump.c:848 writenote+0x206/0x2b0 fs/binfmt_elf.c:1487 write_note_info fs/binfmt_elf.c:1965 [inline] elf_core_dump+0x245c/0x36e0 fs/binfmt_elf.c:2129 do_coredump+0x2d28/0x3cc0 fs/coredump.c:762 get_signal+0x1bff/0x25b0 kernel/signal.c:2845 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:309 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564 RIP: 0033:0x7f08ed08c101 Code: 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 83 c8 ff c3 66 2e 0f 1f RSP: 002b:0000000020000060 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f08ed1ac050 RCX: 00007f08ed08c0f9 RDX: 0000000020000080 RSI: 0000000020000060 RDI: 0000000000000000 RBP: 00007f08ed0e7b39 R08: 0000000020000280 R09: 0000000020000280 R10: 0000000020000240 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdb1fd5fcf R14: 00007f08ede92300 R15: 0000000000022000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:bfs_move_block fs/bfs/file.c:42 [inline] RIP: 0010:bfs_move_blocks fs/bfs/file.c:56 [inline] RIP: 0010:bfs_get_block+0x35a/0xdd0 fs/bfs/file.c:125 Code: 48 89 f8 48 c1 e8 03 80 3c 08 00 0f 85 64 08 00 00 49 8d 7e 28 48 8b 55 20 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 2d 08 00 00 48 8d 7d 28 4d 8b 4e 28 48 b9 00 00 RSP: 0018:ffffc900035cef68 EFLAGS: 00010206 RAX: 0000000000000005 RBX: 0000000000000021 RCX: dffffc0000000000 RDX: 0000000000000200 RSI: ffffffff81f20dff RDI: 0000000000000028 RBP: ffff88807124f950 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000fffffffa R11: 0000000000000000 R12: ffff88804b574000 R13: ffffed10096ae82c R14: 0000000000000000 R15: 0000000000000024 FS: 00007f08ede92700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f08edcd56be CR3: 000000002d709000 CR4: 00000000003506f0 DR0: 00000000ffff070c DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 89 f8 mov %rdi,%rax 3: 48 c1 e8 03 shr $0x3,%rax 7: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) b: 0f 85 64 08 00 00 jne 0x875 11: 49 8d 7e 28 lea 0x28(%r14),%rdi 15: 48 8b 55 20 mov 0x20(%rbp),%rdx 19: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 20: fc ff df 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 0f 85 2d 08 00 00 jne 0x861 34: 48 8d 7d 28 lea 0x28(%rbp),%rdi 38: 4d 8b 4e 28 mov 0x28(%r14),%r9 3c: 48 rex.W 3d: b9 .byte 0xb9

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2023/03/15 12:28	upstream	6015b1aca1a2	18b58603	.config	console log	report			info		ci-upstream-kasan-gce-selinux-root	general protection fault in bfs_get_block
2023/02/02 01:41	upstream	c0b67534c95c	9dfcf09c	.config	console log	report			info		ci-upstream-kasan-gce-selinux-root	general protection fault in bfs_get_block

Crashes (2):

Assets (help?)