Hello, syzbot found the following issue on: HEAD commit: bbed346d5a96 Merge branch 'for-next/core' 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=17ec92cc880000 kernel config: https://syzkaller.appspot.com/x/.config?x=aae2d21e7dd80684 dashboard link: https://syzkaller.appspot.com/bug?extid=27d15e986992eff93cd9 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. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/11078f50b80b/disk-bbed346d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/398e5f1e6c84/vmlinux-bbed346d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+27d15e986992eff93cd9@xxxxxxxxxxxxxxxxxxxxxxxxx Unable to handle kernel NULL pointer dereference at virtual address 0000000000000068 Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=0000000131b9c000 [0000000000000068] pgd=080000013f9b8003, p4d=080000013f9b8003, pud=080000012eae9003, pmd=0000000000000000 Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 2588 Comm: syz-executor.3 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : d_really_is_negative include/linux/dcache.h:465 [inline] pc : reiserfs_xattr_jcreate_nblocks fs/reiserfs/xattr.h:79 [inline] pc : reiserfs_set_acl+0xd0/0x2c0 fs/reiserfs/xattr_acl.c:36 lr : reiserfs_xattr_jcreate_nblocks fs/reiserfs/xattr.h:78 [inline] lr : reiserfs_set_acl+0xc0/0x2c0 fs/reiserfs/xattr_acl.c:36 sp : ffff80001688b990 x29: ffff80001688b9e0 x28: ffff0000c8cdfc00 x27: 0000000000000002 x26: 0000000000000000 x25: 0000000000000036 x24: 000000000000002b x23: 0000000000000000 x22: ffff0000eb2ee000 x21: ffff0000ef1d5380 x20: 0000000000004000 x19: ffff0000ed8f8de0 x18: 00000000000000c0 x17: ffff80000dd0b198 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000002 x13: 0000000000000020 x12: 0000000000040000 x11: 00000000000042eb x10: 000000000000006c x9 : 00000000000001c0 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000c40 x4 : 0000000000000080 x3 : 0000000000004000 x2 : ffff0000ef1d5380 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: reiserfs_xattr_jcreate_nblocks fs/reiserfs/xattr.h:78 [inline] reiserfs_set_acl+0xd0/0x2c0 fs/reiserfs/xattr_acl.c:36 set_posix_acl fs/posix_acl.c:1015 [inline] posix_acl_xattr_set+0x1dc/0x23c fs/posix_acl.c:1034 __vfs_setxattr+0x250/0x260 fs/xattr.c:182 __vfs_setxattr_noperm+0xcc/0x320 fs/xattr.c:216 __vfs_setxattr_locked+0x16c/0x194 fs/xattr.c:277 vfs_setxattr+0x174/0x280 fs/xattr.c:313 do_setxattr fs/xattr.c:600 [inline] setxattr fs/xattr.c:623 [inline] path_setxattr+0x354/0x414 fs/xattr.c:642 __do_sys_lsetxattr fs/xattr.c:665 [inline] __se_sys_lsetxattr fs/xattr.c:661 [inline] __arm64_sys_lsetxattr+0x2c/0x40 fs/xattr.c:661 __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+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Code: f942d388 f10002ff 52803809 52800d8a (f9403508) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f942d388 ldr x8, [x28, #1440] 4: f10002ff cmp x23, #0x0 8: 52803809 mov w9, #0x1c0 // #448 c: 52800d8a mov w10, #0x6c // #108 * 10: f9403508 ldr x8, [x8, #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.
