------------[ cut here ]------------ WARNING: CPU: 1 PID: 6549 at mm/page_alloc.c:5568 __alloc_pages+0x308/0x698 mm/page_alloc.c:5568 Modules linked in: CPU: 1 PID: 6549 Comm: syz-executor.0 Not tainted 6.3.0-rc6-syzkaller-00066-g1f5b16c51aef #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __alloc_pages+0x308/0x698 mm/page_alloc.c:5568 lr : __alloc_pages+0xc8/0x698 mm/page_alloc.c:5562 sp : ffff80001e867760 x29: ffff80001e867850 x28: ffff80001e867780 x27: dfff800000000000 x26: ffff700003d0cef0 x25: 0000000000000000 x24: ffff80001e8677a0 x23: 0000000000000000 x22: 0000000000040d40 x21: 1ffff00003d0cef4 x20: ffff80001e8677c0 x19: 0000000000000014 x18: 1fffe000368561b6 x17: ffff800015c7d000 x16: ffff800012268b80 x15: ffff800008ac5e7c x14: ffff800008ac2c40 x13: ffff800008063500 x12: 0000000000000005 x11: 1ffff00003d0cef8 x10: 0000000000000000 x9 : 0000000000000001 x8 : ffff8000187c1000 x7 : 0000000000000000 x6 : ffff800008063500 x5 : ffff0000ca61f838 x4 : 0000000000000000 x3 : 0000000000000020 x2 : 0000000000000008 x1 : 0000000000000000 x0 : ffff80001e8677c0 Call trace: __alloc_pages+0x308/0x698 mm/page_alloc.c:5568 __alloc_pages_node include/linux/gfp.h:237 [inline] alloc_pages_node include/linux/gfp.h:260 [inline] __kmalloc_large_node+0xbc/0x1fc mm/slab_common.c:1112 __do_kmalloc_node mm/slab_common.c:955 [inline] __kmalloc+0x124/0x1b8 mm/slab_common.c:980 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] v9fs_fid_get_acl+0x64/0x114 fs/9p/acl.c:32 __v9fs_get_acl fs/9p/acl.c:66 [inline] v9fs_get_acl+0x124/0x390 fs/9p/acl.c:93 v9fs_mount+0x77c/0xa5c fs/9p/vfs_super.c:183 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe04 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 irq event stamp: 1652 hardirqs last enabled at (1651): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:242 hardirqs last disabled at (1652): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (1416): [] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (1416): [] __do_softirq+0xac0/0xd54 kernel/softirq.c:600 softirqs last disabled at (1313): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]--- Unable to handle kernel paging request at virtual address ffffffff00000000 KASAN: maybe wild-memory-access in range [0x0003fff800000000-0x0003fff800000007] 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 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001ac9f3000 [ffffffff00000000] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 6549 Comm: syz-executor.0 Tainted: G W 6.3.0-rc6-syzkaller-00066-g1f5b16c51aef #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __lse_atomic_fetch_add_release arch/arm64/include/asm/atomic_lse.h:62 [inline] pc : __lse_atomic_fetch_sub_release arch/arm64/include/asm/atomic_lse.h:76 [inline] pc : arch_atomic_fetch_sub_release arch/arm64/include/asm/atomic.h:51 [inline] pc : atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:177 [inline] pc : __refcount_sub_and_test include/linux/refcount.h:272 [inline] pc : __refcount_dec_and_test include/linux/refcount.h:315 [inline] pc : refcount_dec_and_test include/linux/refcount.h:333 [inline] pc : posix_acl_release include/linux/posix_acl.h:57 [inline] pc : v9fs_get_acl+0x1b0/0x390 fs/9p/acl.c:102 lr : arch_atomic_fetch_sub_release arch/arm64/include/asm/atomic.h:51 [inline] lr : atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:177 [inline] lr : __refcount_sub_and_test include/linux/refcount.h:272 [inline] lr : __refcount_dec_and_test include/linux/refcount.h:315 [inline] lr : refcount_dec_and_test include/linux/refcount.h:333 [inline] lr : posix_acl_release include/linux/posix_acl.h:57 [inline] lr : v9fs_get_acl+0x1ac/0x390 fs/9p/acl.c:102 sp : ffff80001e867970 x29: ffff80001e867970 x28: dfff800000000000 x27: 1ffff00003d0cf3c x26: 1ffff00003d0cf38 x25: ffff0000e04b2da0 x24: ffff0000e04b2d38 x23: ffff0000e0738000 x22: dfff800000000000 x21: ffffffff00000000 x20: 00000000fffffffb x19: fffffffffffffffb x18: 1fffe000368561b6 x17: ffff800015c7d000 x16: ffff80001231a888 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000001 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 x8 : 00000000ffffffff x7 : 0000000000000000 x6 : ffff800008063500 x5 : 00000000ffffffff x4 : 0000000000000d40 x3 : ffff800009ce5f4c x2 : 0000000000000001 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: arch_atomic_fetch_sub_release arch/arm64/include/asm/atomic.h:51 [inline] atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:177 [inline] __refcount_sub_and_test include/linux/refcount.h:272 [inline] __refcount_dec_and_test include/linux/refcount.h:315 [inline] refcount_dec_and_test include/linux/refcount.h:333 [inline] posix_acl_release include/linux/posix_acl.h:57 [inline] v9fs_get_acl+0x1b0/0x390 fs/9p/acl.c:102 v9fs_mount+0x77c/0xa5c fs/9p/vfs_super.c:183 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe04 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Code: 97b2019d d503201f 97a04abc 12800008 (b86802b6) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97b2019d bl 0xfffffffffec80674 4: d503201f nop 8: 97a04abc bl 0xfffffffffe812af8 c: 12800008 mov w8, #0xffffffff // #-1 * 10: b86802b6 ldaddl w8, w22, [x21] <-- trapping instruction