================================================================== BUG: KASAN: stack-out-of-bounds in atomic64_try_cmpxchg include/asm-generic/atomic-instrumented.h:1503 [inline] BUG: KASAN: stack-out-of-bounds in atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:442 [inline] BUG: KASAN: stack-out-of-bounds in __down_write kernel/locking/rwsem.c:1424 [inline] BUG: KASAN: stack-out-of-bounds in down_write+0x91/0x150 kernel/locking/rwsem.c:1583 Write of size 8 at addr ffff8881e1f17c00 by task syz-executor.3/6039 CPU: 0 PID: 6039 Comm: syz-executor.3 Tainted: G W 5.4.274-syzkaller-00002-g6f97bd951d82 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x241 lib/dump_stack.c:118 print_address_description+0x8c/0x600 mm/kasan/report.c:384 __kasan_report+0xf3/0x120 mm/kasan/report.c:516 kasan_report+0x30/0x60 mm/kasan/common.c:653 check_memory_region_inline mm/kasan/generic.c:141 [inline] check_memory_region+0x272/0x280 mm/kasan/generic.c:191 atomic64_try_cmpxchg include/asm-generic/atomic-instrumented.h:1503 [inline] atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:442 [inline] __down_write kernel/locking/rwsem.c:1424 [inline] down_write+0x91/0x150 kernel/locking/rwsem.c:1583 i_mmap_lock_write include/linux/fs.h:551 [inline] unlink_file_vma+0x7c/0x1b0 mm/mmap.c:163 free_pgtables+0x135/0x280 mm/memory.c:428 exit_mmap+0x2cb/0x520 mm/mmap.c:3192 __mmput+0x8e/0x2c0 kernel/fork.c:1101 exit_mm kernel/exit.c:536 [inline] do_exit+0xc08/0x2bc0 kernel/exit.c:846 do_group_exit+0x138/0x300 kernel/exit.c:982 get_signal+0xdb1/0x1440 kernel/signal.c:2735 do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f209cd01ea9 Code: Bad RIP value. RSP: 002b:00007f209c05b178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f209ce39058 RCX: 00007f209cd01ea9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f209ce39058 RBP: 00007f209ce39050 R08: 00007f209c05b6c0 R09: 00007f209c05b6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f209ce3905c R13: 000000000000006e R14: 00007ffe285c13f0 R15: 00007ffe285c14d8 The buggy address belongs to the page: page:ffffea000787c5c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0x8000000000000000() raw: 8000000000000000 0000000000000000 ffffea000787c5c8 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x500dc0(GFP_USER|__GFP_ZERO|__GFP_ACCOUNT) set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook mm/page_alloc.c:2165 [inline] prep_new_page+0x18f/0x370 mm/page_alloc.c:2171 get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794 __alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4893 __alloc_pages include/linux/gfp.h:503 [inline] __alloc_pages_node include/linux/gfp.h:516 [inline] alloc_pages_node include/linux/gfp.h:530 [inline] alloc_thread_stack_node kernel/fork.c:259 [inline] dup_task_struct+0x85/0x600 kernel/fork.c:886 copy_process+0x56d/0x3230 kernel/fork.c:1889 _do_fork+0x197/0x900 kernel/fork.c:2399 __do_sys_clone3 kernel/fork.c:2688 [inline] __se_sys_clone3 kernel/fork.c:2675 [inline] __x64_sys_clone3+0x2da/0x300 kernel/fork.c:2675 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1176 [inline] __free_pages_ok+0x847/0x950 mm/page_alloc.c:1438 free_the_page mm/page_alloc.c:4955 [inline] __free_pages+0x91/0x140 mm/page_alloc.c:4961 skb_release_all net/core/skbuff.c:675 [inline] __kfree_skb net/core/skbuff.c:689 [inline] kfree_skb+0xb8/0x3c0 net/core/skbuff.c:708 __skb_queue_purge include/linux/skbuff.h:2826 [inline] __tipc_shutdown+0x113b/0x14c0 net/tipc/socket.c:540 tipc_release+0x76/0xf10 net/tipc/socket.c:593 __sock_release net/socket.c:591 [inline] sock_close+0xc7/0x220 net/socket.c:1277 __fput+0x262/0x680 fs/file_table.c:281 task_work_run+0x140/0x170 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x190/0x1a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Memory state around the buggy address: ffff8881e1f17b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881e1f17b80: 00 00 00 00 f1 f1 f1 f1 04 f2 00 00 00 00 00 f2 >ffff8881e1f17c00: f2 f2 f2 f2 04 f2 04 f2 04 f3 f3 f3 00 00 00 00 ^ ffff8881e1f17c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881e1f17d00: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 00 f2 f2 ================================================================== kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 6039 Comm: syz-executor.3 Tainted: G B W 5.4.274-syzkaller-00002-g6f97bd951d82 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:owner_on_cpu kernel/locking/rwsem.c:657 [inline] RIP: 0010:rwsem_can_spin_on_owner+0xd8/0x170 kernel/locking/rwsem.c:681 Code: ff eb 02 31 db 89 d8 5b 41 5c 41 5e 41 5f c3 49 89 c6 b3 01 49 83 e6 f8 74 c8 83 e0 01 75 c3 4d 8d 7e 38 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 75 5c 41 83 3f 00 74 a7 49 83 c6 3c 4c 89 f0 RSP: 0018:ffff8881f0bcf558 EFLAGS: 00010206 RAX: 0000000008008aa0 RBX: ffff8881e9679f01 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881e1f17c08 RBP: ffff8881f0bcf770 R08: dffffc0000000000 R09: 0000000000000007 R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000002 R14: 00000000400454c8 R15: 0000000040045500 FS: 00007f209c05b6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020294000 CR3: 00000001ee1c7000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rwsem_down_write_slowpath+0x149/0x1430 kernel/locking/rwsem.c:1163 __down_write kernel/locking/rwsem.c:1426 [inline] down_write+0x146/0x150 kernel/locking/rwsem.c:1583 i_mmap_lock_write include/linux/fs.h:551 [inline] unlink_file_vma+0x7c/0x1b0 mm/mmap.c:163 free_pgtables+0x135/0x280 mm/memory.c:428 exit_mmap+0x2cb/0x520 mm/mmap.c:3192 __mmput+0x8e/0x2c0 kernel/fork.c:1101 exit_mm kernel/exit.c:536 [inline] do_exit+0xc08/0x2bc0 kernel/exit.c:846 do_group_exit+0x138/0x300 kernel/exit.c:982 get_signal+0xdb1/0x1440 kernel/signal.c:2735 do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f209cd01ea9 Code: Bad RIP value. RSP: 002b:00007f209c05b178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f209ce39058 RCX: 00007f209cd01ea9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f209ce39058 RBP: 00007f209ce39050 R08: 00007f209c05b6c0 R09: 00007f209c05b6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f209ce3905c R13: 000000000000006e R14: 00007ffe285c13f0 R15: 00007ffe285c14d8 Modules linked in: ---[ end trace 9e2259d49ef4ef60 ]--- RIP: 0010:owner_on_cpu kernel/locking/rwsem.c:657 [inline] RIP: 0010:rwsem_can_spin_on_owner+0xd8/0x170 kernel/locking/rwsem.c:681 Code: ff eb 02 31 db 89 d8 5b 41 5c 41 5e 41 5f c3 49 89 c6 b3 01 49 83 e6 f8 74 c8 83 e0 01 75 c3 4d 8d 7e 38 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 75 5c 41 83 3f 00 74 a7 49 83 c6 3c 4c 89 f0 RSP: 0018:ffff8881f0bcf558 EFLAGS: 00010206 RAX: 0000000008008aa0 RBX: ffff8881e9679f01 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881e1f17c08 RBP: ffff8881f0bcf770 R08: dffffc0000000000 R09: 0000000000000007 R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000002 R14: 00000000400454c8 R15: 0000000040045500 FS: 00007f209c05b6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f209cd01e7f CR3: 00000001ee1c7000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: eb 02 jmp 0x4 2: 31 db xor %ebx,%ebx 4: 89 d8 mov %ebx,%eax 6: 5b pop %rbx 7: 41 5c pop %r12 9: 41 5e pop %r14 b: 41 5f pop %r15 d: c3 ret e: 49 89 c6 mov %rax,%r14 11: b3 01 mov $0x1,%bl 13: 49 83 e6 f8 and $0xfffffffffffffff8,%r14 17: 74 c8 je 0xffffffe1 19: 83 e0 01 and $0x1,%eax 1c: 75 c3 jne 0xffffffe1 1e: 4d 8d 7e 38 lea 0x38(%r14),%r15 22: 4c 89 f8 mov %r15,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 75 5c jne 0x8e 32: 41 83 3f 00 cmpl $0x0,(%r15) 36: 74 a7 je 0xffffffdf 38: 49 83 c6 3c add $0x3c,%r14 3c: 4c 89 f0 mov %r14,%rax