Hello, syzbot found the following issue on: HEAD commit: 247f34f7b803 Linux 6.1-rc2 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=15de909a480000 kernel config: https://syzkaller.appspot.com/x/.config?x=fa9bed8d6a8992a0 dashboard link: https://syzkaller.appspot.com/bug?extid=3f6ef04b7cf85153b528 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=100896ec480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/05f9a7fca332/disk-247f34f7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ec50c3ad7d48/vmlinux-247f34f7.xz kernel image: https://storage.googleapis.com/syzbot-assets/1446f94b11ed/Image-247f34f7.gz.xz mounted in repro #1: https://storage.googleapis.com/syzbot-assets/b331beed692c/mount_0.gz mounted in repro #2: https://storage.googleapis.com/syzbot-assets/980b2ce32188/mount_1.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3f6ef04b7cf85153b528@xxxxxxxxxxxxxxxxxxxxxxxxx REISERFS (device loop0): Using rupasov hash to sort names REISERFS warning (device loop0): jdm-20006 create_privroot: xattrs/ACLs enabled and couldn't find/create .reiserfs_priv. Failing mount. loop0: detected capacity change from 0 to 32768 Unable to handle kernel paging request at virtual address ffff00001a06e183 Mem abort info: ESR = 0x0000000096000021 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x21: alignment fault Data abort info: ISV = 0, ISS = 0x00000021 CM = 0, WnR = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001c54db000 [ffff00001a06e183] pgd=180000023fff8003, p4d=180000023fff8003, pud=180000023fff7003, pmd=180000023ff26003, pte=006800005a06e707 Internal error: Oops: 0000000096000021 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 3121 Comm: syz-executor.0 Not tainted 6.1.0-rc2-syzkaller-154433-g247f34f7b803 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __lse__cmpxchg_case_mb_64 arch/arm64/include/asm/atomic_lse.h:287 [inline] pc : __cmpxchg_case_mb_64 arch/arm64/include/asm/cmpxchg.h:130 [inline] pc : __cmpxchg_mb arch/arm64/include/asm/cmpxchg.h:175 [inline] pc : osq_lock+0x110/0x1f8 kernel/locking/osq_lock.c:162 lr : osq_lock+0x38/0x1f8 kernel/locking/osq_lock.c:94 sp : ffff80001305b980 x29: ffff80001305b980 x28: ffff80000eec9000 x27: ffff80000cbb6d47 x26: 0000000000000000 x25: ffff800008774160 x24: ffff0000cbd3ce90 x23: ffff80000879e1b8 x22: ffff80000d2e2c40 x21: ffff00001a06e183 x20: ffff0001fefd0c40 x19: ffff0000cbd3ce70 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000000 x10: ffff0001fefd0c50 x9 : 0000000000000002 x8 : ffff0001fefd0c40 x7 : 0000000000000000 x6 : ffff80000879e1b8 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0001fefd0c40 x0 : ffff00001a06e183 Call trace: __lse__cmpxchg_case_mb_64 arch/arm64/include/asm/atomic_lse.h:287 [inline] __cmpxchg_case_mb_64 arch/arm64/include/asm/cmpxchg.h:130 [inline] __cmpxchg_mb arch/arm64/include/asm/cmpxchg.h:175 [inline] osq_lock+0x110/0x1f8 kernel/locking/osq_lock.c:162 mutex_optimistic_spin+0x1dc/0x254 kernel/locking/mutex.c:460 __mutex_lock_common+0x1b4/0xca8 kernel/locking/mutex.c:607 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 reiserfs_write_lock+0x3c/0x64 fs/reiserfs/lock.c:27 reiserfs_readdir_inode+0x9c/0x684 fs/reiserfs/dir.c:79 reiserfs_readdir+0x28/0x38 fs/reiserfs/dir.c:274 iterate_dir+0x114/0x28c __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __arm64_sys_getdents64+0x80/0x204 fs/readdir.c:354 __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: aa1503e0 aa1403e1 aa1f03e2 aa0103e8 (c8e8fea2) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: aa1503e0 mov x0, x21 4: aa1403e1 mov x1, x20 8: aa1f03e2 mov x2, xzr c: aa0103e8 mov x8, x1 * 10: c8e8fea2 casal x8, x2, [x21] <-- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
