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 U6RgZXZb 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uQzzNLfv2ktpNSArZsyFo3slnsZSe4Eeov26LZqxdWFva3b2PA5PZJlZdGAgeo9lKIjSTp9GRw8h2edhf0dUUD95J7JA+xz0OutdSm9+Q5xbEkous7PB/cjLdjCz6jA/LXmUjNrViBnw7qCIdyfhrWglYoBtDCBZzZB0ELMIrsDu9VctBal8JKmpK1HDr/em X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Apr 02, 2025 at 03:20:04AM -0700, syzbot wrote: > > Hi, > > > > This is already addressed in > > https://lore.kernel.org/linux-mm/b2fb6b9c-376d-4e9b-905e-26d847fd3865@lucifer.local/ > > this just doesn't exist in -next/upstream yet. > > > > I _think_ we may be doing a 2nd PR for mm? But if not it'll be fixed in an > > early rc. > > > > To make the point, friendly bot - let's have you try out the fix: > > > > #syz test: git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/ mm-stable > > "git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/" does not look like a valid git repo address. #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/ mm-stable > > > > > Thanks, Lorenzo > > > > On Wed, Apr 02, 2025 at 03:01:20AM -0700, syzbot wrote: > >> syzbot has found a reproducer for the following issue on: > >> > >> HEAD commit: acc4d5ff0b61 Merge tag 'net-6.15-rc0' of git://git.kernel... > >> git tree: upstream > >> console+strace: https://syzkaller.appspot.com/x/log.txt?x=16719404580000 > >> kernel config: https://syzkaller.appspot.com/x/.config?x=24f9c4330e7c0609 > >> dashboard link: https://syzkaller.appspot.com/bug?extid=e3385f43b2897a19be24 > >> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > >> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=175a4fb0580000 > >> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1687b7b0580000 > >> > >> Downloadable assets: > >> disk image: https://storage.googleapis.com/syzbot-assets/e4bfa652b34a/disk-acc4d5ff.raw.xz > >> vmlinux: https://storage.googleapis.com/syzbot-assets/3d19beb8bb92/vmlinux-acc4d5ff.xz > >> kernel image: https://storage.googleapis.com/syzbot-assets/e7298ccc6331/bzImage-acc4d5ff.xz > >> > >> IMPORTANT: if you fix the issue, please add the following tag to the commit: > >> Reported-by: syzbot+e3385f43b2897a19be24@syzkaller.appspotmail.com > >> > >> Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN PTI > >> KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] > >> CPU: 0 UID: 0 PID: 5840 Comm: syz-executor163 Not tainted 6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 PREEMPT(full) > >> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 > >> RIP: 0010:vrm_uncharge mm/mremap.c:964 [inline] > >> RIP: 0010:expand_vma_in_place mm/mremap.c:1566 [inline] > >> RIP: 0010:expand_vma mm/mremap.c:1621 [inline] > >> RIP: 0010:mremap_at mm/mremap.c:1682 [inline] > >> RIP: 0010:do_mremap mm/mremap.c:1727 [inline] > >> RIP: 0010:__do_sys_mremap mm/mremap.c:1784 [inline] > >> RIP: 0010:__se_sys_mremap+0x25fa/0x2c00 mm/mremap.c:1752 > >> Code: c0 0f 85 0e 05 00 00 0f b6 9c 24 20 03 00 00 31 ff 89 de e8 d8 0d ab ff 85 db 0f 84 7b 01 00 00 e8 cb 0a ab ff e9 9e 00 00 00 <80> 78 04 00 74 0a bf 20 00 00 00 e8 26 2f 15 00 4c 8b 34 25 20 00 > >> RSP: 0018:ffffc900040cfb40 EFLAGS: 00010246 > >> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff92000819fca > >> RDX: 0000000000000000 RSI: 0000000010000000 RDI: 0000000000000000 > >> RBP: ffffc900040cff00 R08: ffffffff821d1f24 R09: ffffffff8c271397 > >> R10: 0000000000000004 R11: ffff888034658000 R12: 0000200000000000 > >> R13: ffff888077fac000 R14: 00000000180000fa R15: ffffc900040cfcd0 > >> FS: 0000555571cf3380(0000) GS:ffff888124f99000(0000) knlGS:0000000000000000 > >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > >> CR2: 00002000000000c0 CR3: 00000000316de000 CR4: 00000000003526f0 > >> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > >> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > >> Call Trace: > >> > >> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > >> do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 > >> entry_SYSCALL_64_after_hwframe+0x77/0x7f > >> RIP: 0033:0x7f4480ba0369 > >> Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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:00007fff6c642778 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 > >> RAX: ffffffffffffffda RBX: 0000200000000000 RCX: 00007f4480ba0369 > >> RDX: 0000000000004000 RSI: 0000000000001000 RDI: 0000200000000000 > >> RBP: 0000200000001000 R08: 0000200000001000 R09: 0000000000000000 > >> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 > >> R13: 00007fff6c642958 R14: 0000000000000001 R15: 0000000000000001 > >> > >> Modules linked in: > >> ---[ end trace 0000000000000000 ]--- > >> RIP: 0010:vrm_uncharge mm/mremap.c:964 [inline] > >> RIP: 0010:expand_vma_in_place mm/mremap.c:1566 [inline] > >> RIP: 0010:expand_vma mm/mremap.c:1621 [inline] > >> RIP: 0010:mremap_at mm/mremap.c:1682 [inline] > >> RIP: 0010:do_mremap mm/mremap.c:1727 [inline] > >> RIP: 0010:__do_sys_mremap mm/mremap.c:1784 [inline] > >> RIP: 0010:__se_sys_mremap+0x25fa/0x2c00 mm/mremap.c:1752 > >> Code: c0 0f 85 0e 05 00 00 0f b6 9c 24 20 03 00 00 31 ff 89 de e8 d8 0d ab ff 85 db 0f 84 7b 01 00 00 e8 cb 0a ab ff e9 9e 00 00 00 <80> 78 04 00 74 0a bf 20 00 00 00 e8 26 2f 15 00 4c 8b 34 25 20 00 > >> RSP: 0018:ffffc900040cfb40 EFLAGS: 00010246 > >> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff92000819fca > >> RDX: 0000000000000000 RSI: 0000000010000000 RDI: 0000000000000000 > >> RBP: ffffc900040cff00 R08: ffffffff821d1f24 R09: ffffffff8c271397 > >> R10: 0000000000000004 R11: ffff888034658000 R12: 0000200000000000 > >> R13: ffff888077fac000 R14: 00000000180000fa R15: ffffc900040cfcd0 > >> FS: 0000555571cf3380(0000) GS:ffff888124f99000(0000) knlGS:0000000000000000 > >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > >> CR2: 00002000000000c0 CR3: 00000000316de000 CR4: 00000000003526f0 > >> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > >> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > >> ---------------- > >> Code disassembly (best guess), 1 bytes skipped: > >> 0: 0f 85 0e 05 00 00 jne 0x514 > >> 6: 0f b6 9c 24 20 03 00 movzbl 0x320(%rsp),%ebx > >> d: 00 > >> e: 31 ff xor %edi,%edi > >> 10: 89 de mov %ebx,%esi > >> 12: e8 d8 0d ab ff call 0xffab0def > >> 17: 85 db test %ebx,%ebx > >> 19: 0f 84 7b 01 00 00 je 0x19a > >> 1f: e8 cb 0a ab ff call 0xffab0aef > >> 24: e9 9e 00 00 00 jmp 0xc7 > >> * 29: 80 78 04 00 cmpb $0x0,0x4(%rax) <-- trapping instruction > >> 2d: 74 0a je 0x39 > >> 2f: bf 20 00 00 00 mov $0x20,%edi > >> 34: e8 26 2f 15 00 call 0x152f5f > >> 39: 4c rex.WR > >> 3a: 8b .byte 0x8b > >> 3b: 34 25 xor $0x25,%al > >> 3d: 20 00 and %al,(%rax) > >> > >> > >> --- > >> If you want syzbot to run the reproducer, reply with: > >> #syz test: git://repo/address.git branch-or-commit-hash > >> If you attach or paste a git patch, syzbot will apply it before testing.