KASAN: slab-out-of-bounds Read in hrtimer

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	general protection fault in hrtimer_nanosleep ext4	syz	error		1	110d	177d	0/26	upstream: reported syz repro on 2023/11/01 05:36

device bond1677 entered promiscuous mode ================================================================== BUG: KASAN: slab-out-of-bounds in lookup_object lib/debugobjects.c:156 [inline] BUG: KASAN: slab-out-of-bounds in __debug_object_init+0x742/0x9b0 lib/debugobjects.c:385 Read of size 8 at addr ffff88801b290018 by task syz-executor.1/12879 CPU: 0 PID: 12879 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433 lookup_object lib/debugobjects.c:156 [inline] __debug_object_init+0x742/0x9b0 lib/debugobjects.c:385 hrtimer_init_on_stack kernel/time/hrtimer.c:435 [inline] hrtimer_nanosleep+0x15b/0x570 kernel/time/hrtimer.c:1807 common_nsleep+0x23/0x30 kernel/time/posix-timers.c:1204 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1231 [inline] __se_sys_clock_nanosleep+0x261/0x360 kernel/time/posix-timers.c:1209 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f1899f97d81 Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f RSP: 002b:00007ffc532dbe40 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 00007f189a085f60 RCX: 00007f1899f97d81 RDX: 00007ffc532dbe80 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f189a087960 R08: 0000000000000000 R09: 00000257db8066ff R10: 0000000000000000 R11: 0000000000000293 R12: 000000000023b316 R13: 00007ffc532dbf90 R14: 00007ffc532dbfb0 R15: 0000000000000032 Allocated by task 18455: __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node+0x4c/0x70 mm/slab.c:3696 kmalloc_node include/linux/slab.h:557 [inline] kvmalloc_node+0xb4/0xf0 mm/util.c:423 kasan: CONFIG_KASAN_INLINE enabled kvmalloc include/linux/mm.h:577 [inline] kvzalloc include/linux/mm.h:585 [inline] netif_alloc_netdev_queues net/core/dev.c:8594 [inline] alloc_netdev_mqs+0x69f/0xd50 net/core/dev.c:9197 kasan: GPF could be caused by NULL-ptr deref or user memory access rtnl_create_link+0x1d4/0xa40 net/core/rtnetlink.c:2869 general protection fault: 0000 [#1] PREEMPT SMP KASAN rtnl_newlink+0xf45/0x15c0 net/core/rtnetlink.c:3131 CPU: 1 PID: 13023 Comm: kworker/u4:8 Not tainted 4.19.211-syzkaller #0 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:777 [inline] RIP: 0010:debug_check_no_obj_freed+0x1c9/0x490 lib/debugobjects.c:817 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 Code: 48 b8 00 01 00 00 00 00 ad de 4d 89 60 08 4c 89 c7 49 89 00 e8 a8 d6 ff ff 09 c3 4d 85 f6 74 2c 4d 89 f0 4c 89 c0 48 c1 e8 03 <42> 80 3c 38 00 0f 84 23 ff ff ff 4c 89 c7 4c 89 44 24 38 e8 9f 16 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 RSP: 0018:ffff8882109e7d10 EFLAGS: 00010002 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 RAX: 00000000056accc4 RBX: 0000000000000000 RCX: ffffffff814bdebb ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 RDX: 1ffffffff1a7b2f3 RSI: 0000000000000004 RDI: ffff88800010c520 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 RBP: 0000000000000001 R08: 000000002b566620 R09: ffff88800fb7e4b8 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 R10: ffffffff8d3d978b R11: 00000000eedc7660 R12: dead000000000200 entry_SYSCALL_64_after_hwframe+0x49/0xbe R13: ffff888091962a00 R14: 000000002b566620 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 Freed by task 0: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 (stack is not available) CR2: 000055555710a108 CR3: 00000002108cf000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 The buggy address belongs to the object at ffff88801b290400 which belongs to the cache kmalloc-8192 of size 8192 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 The buggy address is located 1000 bytes to the left of 8192-byte region [ffff88801b290400, ffff88801b292400) Call Trace: The buggy address belongs to the page: page:ffffea00006ca400 count:1 mapcount:0 mapping:ffff88813bff2080 index:0x0 compound_mapcount: 0 kmem_cache_free+0xff/0x260 mm/slab.c:3764 flags: 0xfff00000008100(slab|head) free_fs_struct fs/fs_struct.c:91 [inline] exit_fs+0x120/0x170 fs/fs_struct.c:107 raw: 00fff00000008100 ffffea0000667b08 ffffea00006c8a08 ffff88813bff2080 do_exit+0xbc1/0x2be0 kernel/exit.c:866 raw: 0000000000000000 ffff88801b290400 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: call_usermodehelper_exec_async+0x48d/0x6a0 kernel/umh.c:129 ffff88801b28ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801b28ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 >ffff88801b290000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc Modules linked in: ^ ---[ end trace ad4bfaaa8fa5e0d3 ]--- ffff88801b290080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:777 [inline] RIP: 0010:debug_check_no_obj_freed+0x1c9/0x490 lib/debugobjects.c:817 ffff88801b290100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc Code: 48 b8 00 01 00 00 00 00 ad de 4d 89 60 08 4c 89 c7 49 89 00 e8 a8 d6 ff ff 09 c3 4d 85 f6 74 2c 4d 89 f0 4c 89 c0 48 c1 e8 03 <42> 80 3c 38 00 0f 84 23 ff ff ff 4c 89 c7 4c 89 44 24 38 e8 9f 16 ================================================================== RSP: 0018:ffff8882109e7d10 EFLAGS: 00010002 ---------------- Code disassembly (best guess): 0: 48 b8 00 01 00 00 00 movabs $0xdead000000000100,%rax 7: 00 ad de a: 4d 89 60 08 mov %r12,0x8(%r8) e: 4c 89 c7 mov %r8,%rdi 11: 49 89 00 mov %rax,(%r8) 14: e8 a8 d6 ff ff callq 0xffffd6c1 19: 09 c3 or %eax,%ebx 1b: 4d 85 f6 test %r14,%r14 1e: 74 2c je 0x4c 20: 4d 89 f0 mov %r14,%r8 23: 4c 89 c0 mov %r8,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2f: 0f 84 23 ff ff ff je 0xffffff58 35: 4c 89 c7 mov %r8,%rdi 38: 4c 89 44 24 38 mov %r8,0x38(%rsp) 3d: e8 .byte 0xe8 3e: 9f lahf 3f: 16 (bad)