Hello, syzbot found the following issue on: HEAD commit: 85413d1e802e Merge branch 'for-next/fixes' into 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=113a1bc7080000 kernel config: https://syzkaller.appspot.com/x/.config?x=57b9bfeca947ab90 dashboard link: https://syzkaller.appspot.com/bug?extid=3c530d01065fbfab6070 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3c530d01065fbfab6070@xxxxxxxxxxxxxxxxxxxxxxxxx loop1: detected capacity change from 0 to 65534 Unable to handle kernel paging request at virtual address 0000000081a401ba 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 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=0000000138114000 [0000000081a401ba] pgd=080000013d972003, p4d=080000013d972003, pud=0000000000000000 Internal error: Oops: 96000005 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 15506 Comm: syz-executor.1 Not tainted 6.0.0-rc3-syzkaller-16800-g85413d1e802e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : d_really_is_negative include/linux/dcache.h:465 [inline] pc : open_xa_root fs/reiserfs/xattr.c:124 [inline] pc : open_xa_dir+0x48/0x2a8 fs/reiserfs/xattr.c:152 lr : open_xa_dir+0x34/0x2a8 fs/reiserfs/xattr.c:148 sp : ffff80002214b850 x29: ffff80002214b870 x28: 0000000000000030 x27: ffff0000e44c7d68 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000081a40152 x23: 0000000000000000 x22: 0000000000000002 x21: ffff0000e4530190 x20: 0000000000000002 x19: ffff0000c3f35000 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000002 x13: 0000000000008000 x12: 0000000000040000 x11: 000000000001f773 x10: ffff80001a24a000 x9 : ffff800008795070 x8 : ffff0000fae34b00 x7 : ffff8000086ace88 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000002 x1 : 0000000000000002 x0 : ffff0000e4530190 Call trace: open_xa_root fs/reiserfs/xattr.c:121 [inline] open_xa_dir+0x48/0x2a8 fs/reiserfs/xattr.c:152 xattr_lookup+0x34/0x198 fs/reiserfs/xattr.c:395 reiserfs_xattr_get+0x8c/0x680 fs/reiserfs/xattr.c:677 reiserfs_get_acl+0x84/0x1ac fs/reiserfs/xattr_acl.c:214 get_acl+0x104/0x330 fs/posix_acl.c:152 check_acl+0x40/0x168 fs/namei.c:306 acl_permission_check fs/namei.c:351 [inline] generic_permission+0x270/0x32c fs/namei.c:404 reiserfs_permission+0x4c/0x6c fs/reiserfs/xattr.c:954 do_inode_permission fs/namei.c:458 [inline] inode_permission+0x128/0x244 fs/namei.c:525 may_open+0x1e4/0x2bc fs/namei.c:3185 do_open fs/namei.c:3555 [inline] path_openat+0xdd0/0x11c4 fs/namei.c:3691 do_filp_open+0xdc/0x1b8 fs/namei.c:3718 do_sys_openat2+0xb8/0x22c fs/open.c:1311 do_sys_open fs/open.c:1327 [inline] __do_sys_openat fs/open.c:1343 [inline] __se_sys_openat fs/open.c:1338 [inline] __arm64_sys_openat+0xb0/0xe0 fs/open.c:1338 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 Code: 390043ff a9007fff f9433e68 f942cd18 (f9403708) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 390043ff strb wzr, [sp, #16] 4: a9007fff stp xzr, xzr, [sp] 8: f9433e68 ldr x8, [x19, #1656] c: f942cd18 ldr x24, [x8, #1432] * 10: f9403708 ldr x8, [x24, #104] <-- 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.
