================================================================== BUG: KASAN: slab-out-of-bounds in instrument_atomic_read include/linux/instrumented.h:71 [inline] BUG: KASAN: slab-out-of-bounds in atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] BUG: KASAN: slab-out-of-bounds in refcount_read include/linux/refcount.h:147 [inline] BUG: KASAN: slab-out-of-bounds in __refcount_add_not_zero include/linux/refcount.h:152 [inline] BUG: KASAN: slab-out-of-bounds in __refcount_inc_not_zero include/linux/refcount.h:227 [inline] BUG: KASAN: slab-out-of-bounds in refcount_inc_not_zero include/linux/refcount.h:245 [inline] BUG: KASAN: slab-out-of-bounds in sk_psock_get+0xe4/0x2c0 include/linux/skmsg.h:450 Read of size 4 at addr ffff888062a242b8 by task syz-executor.2/3985 CPU: 0 PID: 3985 Comm: syz-executor.2 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:450 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:71 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] refcount_read include/linux/refcount.h:147 [inline] __refcount_add_not_zero include/linux/refcount.h:152 [inline] __refcount_inc_not_zero include/linux/refcount.h:227 [inline] refcount_inc_not_zero include/linux/refcount.h:245 [inline] sk_psock_get+0xe4/0x2c0 include/linux/skmsg.h:450 tls_sw_recvmsg+0x159/0x1230 net/tls/tls_sw.c:1782 inet6_recvmsg+0xf2/0x490 net/ipv6/af_inet6.c:660 sock_recvmsg_nosec net/socket.c:944 [inline] sock_recvmsg net/socket.c:962 [inline] sock_recvmsg net/socket.c:958 [inline] ____sys_recvmsg+0x25e/0x620 net/socket.c:2628 ___sys_recvmsg+0xe2/0x1a0 net/socket.c:2670 do_recvmmsg+0x1c8/0x550 net/socket.c:2764 __sys_recvmmsg net/socket.c:2843 [inline] __do_sys_recvmmsg net/socket.c:2866 [inline] __se_sys_recvmmsg net/socket.c:2859 [inline] __x64_sys_recvmmsg+0x19a/0x200 net/socket.c:2859 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f9e39a6e739 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9e391e5188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f9e39b72f80 RCX: 00007f9e39a6e739 RDX: 000000000000000a RSI: 00000000200030c0 RDI: 0000000000000005 RBP: 00007f9e39ac8cc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000010000 R11: 0000000000000246 R12: 00007f9e39b72f80 R13: 00007fffab343f5f R14: 00007f9e391e5300 R15: 0000000000022000 Allocated by task 3989: kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:259 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc_node mm/slub.c:3234 [inline] slab_alloc mm/slub.c:3242 [inline] kmem_cache_alloc+0x202/0x3a0 mm/slub.c:3247 kmem_cache_zalloc include/linux/slab.h:714 [inline] kcm_attach net/kcm/kcmsock.c:1404 [inline] kcm_attach_ioctl net/kcm/kcmsock.c:1489 [inline] kcm_ioctl+0x3d2/0x10b0 net/kcm/kcmsock.c:1695 sock_do_ioctl+0xc9/0x1c0 net/socket.c:1118 sock_ioctl+0x278/0x510 net/socket.c:1235 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Last potentially related work creation: kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 __kasan_record_aux_stack+0xf5/0x120 mm/kasan/generic.c:348 insert_work+0x42/0x300 kernel/workqueue.c:1354 __queue_work+0x4a5/0xc80 kernel/workqueue.c:1520 queue_work_on+0x70/0x80 kernel/workqueue.c:1547 kcm_attach net/kcm/kcmsock.c:1465 [inline] kcm_attach_ioctl net/kcm/kcmsock.c:1489 [inline] kcm_ioctl+0xc79/0x10b0 net/kcm/kcmsock.c:1695 sock_do_ioctl+0xc9/0x1c0 net/socket.c:1118 sock_ioctl+0x278/0x510 net/socket.c:1235 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff888062a24000 which belongs to the cache kcm_psock_cache of size 568 The buggy address is located 128 bytes to the right of 568-byte region [ffff888062a24000, ffff888062a24238) The buggy address belongs to the page: page:ffffea00018a8900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x62a24 head:ffffea00018a8900 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888020c78780 raw: 0000000000000000 0000000080170017 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3989, ts 61506835246, free_ts 8974019156 prep_new_page mm/page_alloc.c:2418 [inline] get_page_from_freelist+0xa6f/0x2f10 mm/page_alloc.c:4149 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369 alloc_slab_page mm/slub.c:1793 [inline] allocate_slab mm/slub.c:1930 [inline] new_slab+0x32d/0x4a0 mm/slub.c:1993 ___slab_alloc+0x91a/0xfd0 mm/slub.c:3022 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3109 slab_alloc_node mm/slub.c:3200 [inline] slab_alloc mm/slub.c:3242 [inline] kmem_cache_alloc+0x35c/0x3a0 mm/slub.c:3247 kmem_cache_zalloc include/linux/slab.h:714 [inline] kcm_attach net/kcm/kcmsock.c:1404 [inline] kcm_attach_ioctl net/kcm/kcmsock.c:1489 [inline] kcm_ioctl+0x3d2/0x10b0 net/kcm/kcmsock.c:1695 sock_do_ioctl+0xc9/0x1c0 net/socket.c:1118 sock_ioctl+0x278/0x510 net/socket.c:1235 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3309 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3388 free_contig_range+0xa8/0xf0 mm/page_alloc.c:9271 destroy_args+0x7e/0x503 mm/debug_vm_pgtable.c:1016 debug_vm_pgtable+0x1ee5/0x1f69 mm/debug_vm_pgtable.c:1330 do_one_initcall+0xbe/0x440 init/main.c:1297 do_initcall_level init/main.c:1370 [inline] do_initcalls init/main.c:1386 [inline] do_basic_setup init/main.c:1405 [inline] kernel_init_freeable+0x5ab/0x605 init/main.c:1610 kernel_init+0x14/0x130 init/main.c:1499 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Memory state around the buggy address: ffff888062a24180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888062a24200: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc >ffff888062a24280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888062a24300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888062a24380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 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