On Sun, Nov 17, 2024 at 02:42:26AM -0800, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 8e9a54d7181b Merge remote-tracking branch 'iommu/arm/smmu'.. Will take a look properly tomorrow, but this commit doesn't exist in the tree any more. Let's try this again in the actual existing branch... #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci > git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci > console output: https://syzkaller.appspot.com/x/log.txt?x=17b0ace8580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=a1eb85a42cb8ccec > dashboard link: https://syzkaller.appspot.com/bug?extid=bc6bfc25a68b7a020ee1 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > userspace arch: arm64 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=147521a7980000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=102e14c0580000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/ad658fb4d0a2/disk-8e9a54d7.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/1b7754fa8c67/vmlinux-8e9a54d7.xz > kernel image: https://storage.googleapis.com/syzbot-assets/50315382fefb/Image-8e9a54d7.gz.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+bc6bfc25a68b7a020ee1@xxxxxxxxxxxxxxxxxxxxxxxxx > > __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] > invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 > el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 > do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 > el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 > el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 > el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 > Unable to handle kernel paging request at virtual address dfff800000000001 > KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] > Mem abort info: > ESR = 0x0000000096000005 > EC = 0x25: DABT (current EL), IL = 32 bits > SET = 0, FnV = 0 > EA = 0, S1PTW = 0 > FSC = 0x05: level 1 translation fault > Data abort info: > ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 > CM = 0, WnR = 0, TnD = 0, TagAccess = 0 > GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 > [dfff800000000001] address between user and kernel address ranges > Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP > Modules linked in: > CPU: 1 UID: 0 PID: 6421 Comm: syz-executor374 Not tainted 6.12.0-rc7-syzkaller-g8e9a54d7181b #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 > pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > pc : mt_slot_locked lib/maple_tree.c:795 [inline] > pc : mas_slot_locked lib/maple_tree.c:808 [inline] > pc : mas_store_prealloc+0x870/0x1068 lib/maple_tree.c:5514 > lr : mt_slot_locked lib/maple_tree.c:795 [inline] > lr : mas_slot_locked lib/maple_tree.c:808 [inline] > lr : mas_store_prealloc+0x778/0x1068 lib/maple_tree.c:5514 > sp : ffff8000a3e57440 > x29: ffff8000a3e57560 x28: ffff8000a3e574c0 x27: dfff800000000000 > x26: ffff7000147cae94 x25: 0000000000000008 x24: 0000000000000000 > x23: 0000000000000008 x22: ffff0000daed1040 x21: 0000000000000008 > x20: ffff8000a3e578e0 x19: 0000000000000000 x18: 0000000000000008 > x17: 0000000000000000 x16: ffff800080585ea8 x15: 0000000000000009 > x14: 1ffff000147cae99 x13: 0000000000000000 x12: 0000000000000000 > x11: ffff7000147caea2 x10: 0000000000ff0100 x9 : 0000000000000000 > x8 : 0000000000000001 x7 : 0000000000000000 x6 : 0000000000000001 > x5 : ffff8000a3e565f8 x4 : 0000000000000008 x3 : ffff80008b4208f0 > x2 : ffffffffffffffc0 x1 : 0000000000000001 x0 : 0000000000000000 > Call trace: > mt_slot_locked lib/maple_tree.c:795 [inline] (P) > mas_slot_locked lib/maple_tree.c:808 [inline] (P) > mas_store_prealloc+0x870/0x1068 lib/maple_tree.c:5514 (P) > mt_slot_locked lib/maple_tree.c:795 [inline] (L) > mas_slot_locked lib/maple_tree.c:808 [inline] (L) > mas_store_prealloc+0x778/0x1068 lib/maple_tree.c:5514 (L) > vma_iter_store+0x2e8/0x81c mm/vma.h:476 > __mmap_region mm/mmap.c:1513 [inline] > mmap_region+0x1650/0x1d44 mm/mmap.c:1603 > do_mmap+0x8c4/0xfac mm/mmap.c:496 > vm_mmap_pgoff+0x1a0/0x38c mm/util.c:588 > ksys_mmap_pgoff+0x3a4/0x5c8 mm/mmap.c:542 > __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] > __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] > __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 > __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] > invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 > el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 > do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 > el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 > el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 > el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 > Code: 393b2668 972c43de 8b180ef5 d343fea8 (387b6908) > ---[ end trace 0000000000000000 ]--- > ---------------- > Code disassembly (best guess): > 0: 393b2668 strb w8, [x19, #3785] > 4: 972c43de bl 0xfffffffffcb10f7c > 8: 8b180ef5 add x21, x23, x24, lsl #3 > c: d343fea8 lsr x8, x21, #3 > * 10: 387b6908 ldrb w8, [x8, x27] <-- trapping instruction > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > 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. > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup
