syzkaller login: [ 31.990722] BUG: Bad rss-counter state mm:00000000be94ea15 type:MM_FILEPAGES val:33 [ 31.991617] BUG: Bad rss-counter state mm:00000000be94ea15 type:MM_ANONPAGES val:22 [ 32.101482] ================================================================== [ 32.102148] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.102801] Read of size 8 at addr ffff88800974d798 by task sshd/220 [ 32.103318] [ 32.103472] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.104087] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.104814] Call Trace: [ 32.105047] <TASK> [ 32.105255] dump_stack_lvl+0x91/0xf0 [ 32.105745] print_report+0xcc/0x620 [ 32.106104] ? __virt_addr_valid+0x102/0x340 [ 32.106480] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.106896] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.107324] kasan_report+0xbe/0xf0 [ 32.107655] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.108171] vma_interval_tree_remove+0xc75/0xec0 [ 32.108586] vma_prepare+0xc54/0x11a0 [ 32.108933] __split_vma+0x5af/0x950 [ 32.109253] ? __pfx___split_vma+0x10/0x10 [ 32.109604] ? find_held_lock+0x2c/0x110 [ 32.109956] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.110350] ? lock_is_held_type+0x9f/0x120 [ 32.110731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.111200] ? mtree_range_walk+0x632/0x900 [ 32.111582] ? mas_walk+0x5c7/0x7c0 [ 32.111910] do_vmi_munmap+0x1f1/0x2b0 [ 32.112295] mmap_region+0x1f9/0x2660 [ 32.112638] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.112991] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.113522] ? __pfx_lock_acquire+0x10/0x10 [ 32.113902] ? __pfx_mmap_region+0x10/0x10 [ 32.114271] ? security_mmap_addr+0x7d/0xa0 [ 32.114638] ? get_unmapped_area+0x1f5/0x3f0 [ 32.115017] do_mmap+0x854/0xf00 [ 32.115312] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.115652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.116048] ksys_mmap_pgoff+0x3af/0x500 [ 32.116471] do_syscall_64+0x3f/0x90 [ 32.116826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.117267] RIP: 0033:0x7fc6d1aaed82 [ 32.117583] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 32.119047] RSP: 002b:00007fffbee87468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.119651] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6d1aaed82 [ 32.120256] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6d0ee8000 [ 32.120792] RBP: 00007fc6d0ee8000 R08: 0000000000000009 R09: 0000000000001000 [ 32.121337] R10: 0000000000000812 R11: 0000000000000206 R12: 000055877a30fec0 [ 32.121890] R13: 00007fffbee87480 R14: 00007fffbee874b0 R15: 00007fffbee87810 [ 32.122461] </TASK> [ 32.122657] [ 32.122805] Allocated by task 213: [ 32.123100] kasan_save_stack+0x22/0x50 [ 32.123452] kasan_set_track+0x25/0x30 [ 32.123790] __kasan_slab_alloc+0x59/0x70 [ 32.124214] kmem_cache_alloc+0x16b/0x370 [ 32.124561] vm_area_dup+0x20/0x160 [ 32.124869] __split_vma+0x170/0x950 [ 32.125184] split_vma+0xc6/0x110 [ 32.125477] mprotect_fixup+0x8d2/0xb30 [ 32.125814] do_mprotect_pkey+0x87e/0xd40 [ 32.126162] __x64_sys_mprotect+0x78/0xc0 [ 32.126509] do_syscall_64+0x3f/0x90 [ 32.126833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.127283] [ 32.127437] Freed by task 213: [ 32.127709] kasan_save_stack+0x22/0x50 [ 32.128065] kasan_set_track+0x25/0x30 [ 32.128455] kasan_save_free_info+0x2b/0x50 [ 32.128809] __kasan_slab_free+0x10a/0x190 [ 32.129172] kmem_cache_free+0x10d/0x4d0 [ 32.129526] rcu_core+0x8c8/0x2860 [ 32.129829] __do_softirq+0x1b7/0x7d4 [ 32.130168] [ 32.130321] Last potentially related work creation: [ 32.130714] kasan_save_stack+0x22/0x50 [ 32.131047] __kasan_record_aux_stack+0x8e/0xa0 [ 32.131435] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.131871] remove_vma+0x139/0x170 [ 32.132235] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.132606] do_vmi_munmap+0x1f1/0x2b0 [ 32.132927] __vm_munmap+0x138/0x3a0 [ 32.133250] __x64_sys_munmap+0x59/0x80 [ 32.133582] do_syscall_64+0x3f/0x90 [ 32.133906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.134457] [ 32.134601] The buggy address belongs to the object at ffff88800974d740 [ 32.134601] which belongs to the cache vm_area_struct of size 168 [ 32.135634] The buggy address is located 88 bytes inside of [ 32.135634] freed 168-byte region [ffff88800974d740, ffff88800974d7e8) [ 32.136599] [ 32.136743] The buggy address belongs to the physical page: [ 32.137156] page:00000000aa191453 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x974d [ 32.137871] memcg:ffff88800f05ba01 [ 32.138154] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.138584] page_type: 0xffffffff() [ 32.138876] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.139434] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f05ba01 [ 32.140032] page dumped because: kasan: bad access detected [ 32.140491] [ 32.140634] Memory state around the buggy address: [ 32.141015] ffff88800974d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.141569] ffff88800974d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.142115] >ffff88800974d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.142612] ^ [ 32.142901] ffff88800974d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.143452] ffff88800974d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.143967] ================================================================== [ 32.144723] Disabling lock debugging due to kernel taint [ 34.077512] BUG: Bad rss-counter state mm:0000000001c9d819 type:MM_FILEPAGES val:33 [ 34.078517] BUG: Bad rss-counter state mm:0000000001c9d819 type:MM_ANONPAGES val:22 [ 34.464681] BUG: Bad rss-counter state mm:00000000afe95405 type:MM_FILEPAGES val:33 [ 34.465380] BUG: Bad rss-counter state mm:00000000afe95405 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38532' (ECDSA) to the list of known hosts. 2023/06/20 09:20:54 fuzzer started 2023/06/20 09:20:55 dialing manager at localhost:44161 2023/06/20 09:20:55 checking machine... 2023/06/20 09:20:55 checking revisions... [ 35.010731] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:20:55 testing simple program... [ 35.049022] cgroup: Unknown subsys name 'net' [ 35.081797] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:20:54 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffde3113358 CR3=0000000005482000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00007f93382d7510000056378d6da790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801860b0a0 RCX=ffffffff838728b8 RDX=ffff888016ad0000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800d9d7d90 RSP=ffff88800d9d7c90 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff8880095b66b8 R13=0000000000000000 R14=ffff88801024b6b8 R15=0000000000000200 RIP=ffffffff814c07e4 RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb9b139b900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffcf1251000 CR3=000000000efa0000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000