syzbot has found a reproducer for the following issue on: HEAD commit: a6b443748715 Merge branch 'for-next/core', remote-tracking.. 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=144f0654880000 kernel config: https://syzkaller.appspot.com/x/.config?x=14bf9ec0df433b27 dashboard link: https://syzkaller.appspot.com/bug?extid=fc721e2fe15a5aac41d1 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 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17cb3628880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1778ecb0880000 Downloadable assets: disk image: https://storage.googleapis.com/81b491dd5861/disk-a6b44374.raw.xz vmlinux: https://storage.googleapis.com/69c979cdc99a/vmlinux-a6b44374.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fc721e2fe15a5aac41d1@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7715 at fs/fs-writeback.c:1678 writeback_single_inode+0x374/0x388 fs/fs-writeback.c:1678 Modules linked in: CPU: 0 PID: 7715 Comm: syz-executor169 Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : writeback_single_inode+0x374/0x388 fs/fs-writeback.c:1678 lr : writeback_single_inode+0x374/0x388 fs/fs-writeback.c:1678 sp : ffff800015f0b9c0 x29: ffff800015f0ba10 x28: ffff0000cf476000 x27: fffffc0003488dc0 x26: 0000000000000a00 x25: 0000000000000000 x24: 0000000000000001 x23: 0000000000001000 x22: ffff800015f0ba60 x21: 0000000000000000 x20: ffff0000ce87824f x19: ffff0000ce8782d8 x18: 0000000000000379 x17: ffff80000c00d6bc x16: ffff80000db78658 x15: ffff0000cf4c8000 x14: 00000000000000f0 x13: 00000000ffffffff x12: ffff0000cf4c8000 x11: ff80800008619b78 x10: 0000000000000000 x9 : ffff800008619b78 x8 : ffff0000cf4c8000 x7 : ffff800008619848 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: writeback_single_inode+0x374/0x388 fs/fs-writeback.c:1678 write_inode_now+0xb0/0xdc fs/fs-writeback.c:2723 iput_final fs/inode.c:1735 [inline] iput+0x1e4/0x324 fs/inode.c:1774 ntfs_fill_super+0xc30/0x14a4 fs/ntfs/super.c:2994 get_tree_bdev+0x1e8/0x2a0 fs/super.c:1323 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1358 vfs_get_tree+0x40/0x140 fs/super.c:1530 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040 path_mount+0x358/0x914 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x2f8/0x408 fs/namespace.c:3568 __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:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 irq event stamp: 1754 hardirqs last enabled at (1753): [<ffff800008162eec>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (1753): [<ffff800008162eec>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942 hardirqs last disabled at (1754): [<ffff80000bfc5c8c>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395 softirqs last enabled at (546): [<ffff8000080102e4>] _stext+0x2e4/0x37c softirqs last disabled at (541): [<ffff800008017c48>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79 ---[ end trace 0000000000000000 ]--- Unable to handle kernel paging request at virtual address 000000ce87847947 Mem abort info: ESR = 0x0000000096000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault Data abort info: ISV = 0, ISS = 0x00000004 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=00000001135a3000 [000000ce87847947] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 96000004 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 7715 Comm: syz-executor169 Tainted: G W 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : xa_marked include/linux/xarray.h:420 [inline] pc : mapping_tagged include/linux/fs.h:461 [inline] pc : writeback_single_inode+0x228/0x388 fs/fs-writeback.c:1703 lr : writeback_single_inode+0x218/0x388 fs/fs-writeback.c:1702 sp : ffff800015f0b9c0 x29: ffff800015f0ba10 x28: ffff0000cf476000 x27: fffffc0003488dc0 x26: 0000000000000a00 x25: 0000000000001000 x24: 0000000000000001 x23: 0000000000000001 x22: ffff800015f0ba60 x21: ffff0000ce878327 x20: ffff0000ce87824f x19: ffff0000ce8782d8 x18: 0000000000000379 x17: ffff80000c00d6bc x16: ffff80000db78658 x15: ffff0000cf4c8000 x14: 00000000000000f0 x13: 00000000ffffffff x12: ffff0000cf4c8000 x11: ff80800008619a1c x10: 0000000000000000 x9 : ffff0000cf4c8000 x8 : ff0000ce878478ff x7 : ffff800008619848 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: xa_marked include/linux/xarray.h:420 [inline] mapping_tagged include/linux/fs.h:461 [inline] writeback_single_inode+0x228/0x388 fs/fs-writeback.c:1703 write_inode_now+0xb0/0xdc fs/fs-writeback.c:2723 iput_final fs/inode.c:1735 [inline] iput+0x1e4/0x324 fs/inode.c:1774 ntfs_fill_super+0xc30/0x14a4 fs/ntfs/super.c:2994 get_tree_bdev+0x1e8/0x2a0 fs/super.c:1323 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1358 vfs_get_tree+0x40/0x140 fs/super.c:1530 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040 path_mount+0x358/0x914 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x2f8/0x408 fs/namespace.c:3568 __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:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 Code: 710006ff 54000281 f9401a88 2a1f03e0 (b9404917) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 710006ff cmp w23, #0x1 4: 54000281 b.ne 0x54 // b.any 8: f9401a88 ldr x8, [x20, #48] c: 2a1f03e0 mov w0, wzr * 10: b9404917 ldr w23, [x8, #72] <-- trapping instruction
