------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(lock->magic != lock) WARNING: CPU: 0 PID: 29825 at kernel/locking/mutex.c:582 __mutex_lock_common+0x1660/0x21a0 kernel/locking/mutex.c:582 Modules linked in: CPU: 0 PID: 29825 Comm: syz-executor.3 Not tainted 6.6.0-rc4-syzkaller-g19af4a4ed414 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __mutex_lock_common+0x1660/0x21a0 kernel/locking/mutex.c:582 lr : __mutex_lock_common+0x1660/0x21a0 kernel/locking/mutex.c:582 sp : ffff80009a917320 x29: ffff80009a9174b0 x28: dfff800000000000 x27: 1ffff000124b9cf4 x26: ffff8000925ce000 x25: ffff700013522e80 x24: 0000000000000000 x23: 0000000000000000 x22: ffff800080e4110c x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000dbf6e028 x18: 1fffe000368379ce x17: ffff80008e19d000 x16: ffff80008a62a8fc x15: 0000000000000001 x14: 1fffe0001a34ad00 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001a34ad01 x10: 1fffe0001a34ad00 x9 : a4c59428e39c8700 x8 : a4c59428e39c8700 x7 : 1fffe000368379cf x6 : ffff800080297618 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000802841a0 x2 : 0000000000000001 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: __mutex_lock_common+0x1660/0x21a0 kernel/locking/mutex.c:582 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 reiserfs_lookup+0x128/0x45c fs/reiserfs/namei.c:364 lookup_open fs/namei.c:3473 [inline] open_last_lookups fs/namei.c:3563 [inline] path_openat+0xc54/0x27f8 fs/namei.c:3793 do_filp_open+0x1bc/0x3cc fs/namei.c:3823 do_sys_openat2+0x124/0x1b8 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1448 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 irq event stamp: 74547 hardirqs last enabled at (74547): [] seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline] hardirqs last enabled at (74547): [] read_seqbegin+0x80/0x144 include/linux/seqlock.h:837 hardirqs last disabled at (74546): [] seqcount_lockdep_reader_access include/linux/seqlock.h:101 [inline] hardirqs last disabled at (74546): [] read_seqbegin+0x3c/0x144 include/linux/seqlock.h:837 softirqs last enabled at (74520): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (74518): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ================================================================================ UBSAN: array-index-out-of-bounds in kernel/locking/osq_lock.c:34:9 index 23 is out of range for type 'unsigned long[8]' CPU: 0 PID: 29825 Comm: syz-executor.3 Tainted: G W 6.6.0-rc4-syzkaller-g19af4a4ed414 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_out_of_bounds+0xfc/0x148 lib/ubsan.c:348 decode_cpu kernel/locking/osq_lock.c:34 [inline] osq_lock+0x444/0x464 kernel/locking/osq_lock.c:111 mutex_optimistic_spin+0x264/0x49c kernel/locking/mutex.c:460 __mutex_lock_common+0x1bc/0x21a0 kernel/locking/mutex.c:607 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 reiserfs_lookup+0x128/0x45c fs/reiserfs/namei.c:364 lookup_open fs/namei.c:3473 [inline] open_last_lookups fs/namei.c:3563 [inline] path_openat+0xc54/0x27f8 fs/namei.c:3793 do_filp_open+0x1bc/0x3cc fs/namei.c:3823 do_sys_openat2+0x124/0x1b8 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1448 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 ================================================================================ Unable to handle kernel paging request at virtual address ffff80008e108b40 KASAN: probably user-memory-access in range [0x0000000470845a00-0x0000000470845a07] Mem abort info: ESR = 0x0000000096000047 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x07: level 3 translation fault Data abort info: ISV = 0, ISS = 0x00000047, ISS2 = 0x00000000 CM = 0, WnR = 1, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001afb01000 [ffff80008e108b40] pgd=100000023ffff003, p4d=100000023ffff003, pud=100000023fffe003, pmd=100000023fff9003, pte=0000000000000000 Internal error: Oops: 0000000096000047 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 29825 Comm: syz-executor.3 Tainted: G W 6.6.0-rc4-syzkaller-g19af4a4ed414 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : osq_lock+0x154/0x464 kernel/locking/osq_lock.c:126 lr : decode_cpu kernel/locking/osq_lock.c:34 [inline] lr : osq_lock+0x444/0x464 kernel/locking/osq_lock.c:111 sp : ffff80009a917260 x29: ffff80009a917270 x28: 1fffe0003683a369 x27: 1fffe0003683a36a x26: ffff8000925ce000 x25: dfff800000000000 x24: ffff80008e108b40 x23: ffff0001b41d1b48 x22: ffff0001b41d1b50 x21: ffff80008e108b40 x20: ffff0001b41d1b40 x19: ffff0000dbf6e070 x18: 1fffe000368379ce x17: 3d3d3d3d3d3d3d3d x16: ffff80008a62bec8 x15: ffff700012217a90 x14: 1ffff00012217a90 x13: 0000000000000004 x12: ffffffffffffffff x11: 0000000000000001 x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 00000000000a9068 x6 : 00000000000a9008 x5 : ffff80009a916b18 x4 : ffff80008e266298 x3 : ffff8000801c17b8 x2 : 0000000000000001 x1 : 0000000000000002 x0 : 00000000ffffffff Call trace: osq_lock+0x154/0x464 kernel/locking/osq_lock.c:126 mutex_optimistic_spin+0x264/0x49c kernel/locking/mutex.c:460 __mutex_lock_common+0x1bc/0x21a0 kernel/locking/mutex.c:607 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 reiserfs_lookup+0x128/0x45c fs/reiserfs/namei.c:364 lookup_open fs/namei.c:3473 [inline] open_last_lookups fs/namei.c:3563 [inline] path_openat+0xc54/0x27f8 fs/namei.c:3793 do_filp_open+0x1bc/0x3cc fs/namei.c:3823 do_sys_openat2+0x124/0x1b8 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1448 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Code: 38796908 34000068 aa1503e0 941a5a84 (f90002b4) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 38796908 ldrb w8, [x8, x25] 4: 34000068 cbz w8, 0x10 8: aa1503e0 mov x0, x21 c: 941a5a84 bl 0x696a1c * 10: f90002b4 str x20, [x21] <-- trapping instruction