syzkaller login: [ 31.064747] BUG: Bad rss-counter state mm:00000000df500f16 type:MM_FILEPAGES val:33 [ 31.066002] BUG: Bad rss-counter state mm:00000000df500f16 type:MM_ANONPAGES val:22 [ 31.205133] ================================================================== [ 31.206072] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.207013] Read of size 8 at addr ffff888016614058 by task sshd/221 [ 31.208010] [ 31.208236] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.209098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.210110] Call Trace: [ 31.210435] [ 31.210720] dump_stack_lvl+0x91/0xf0 [ 31.211212] print_report+0xcc/0x620 [ 31.211692] ? __virt_addr_valid+0x102/0x340 [ 31.212247] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.212877] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.213500] kasan_report+0xbe/0xf0 [ 31.214001] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.214622] vma_interval_tree_remove+0xc75/0xec0 [ 31.215241] vma_prepare+0xc54/0x11a0 [ 31.215728] __split_vma+0x5af/0x950 [ 31.216213] ? __pfx___split_vma+0x10/0x10 [ 31.216749] ? find_held_lock+0x2c/0x110 [ 31.217273] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.217867] ? lock_is_held_type+0x9f/0x120 [ 31.218404] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.219020] ? mtree_range_walk+0x632/0x900 [ 31.219579] ? mas_walk+0x5c7/0x7c0 [ 31.220060] do_vmi_munmap+0x1f1/0x2b0 [ 31.220560] mmap_region+0x1f9/0x2660 [ 31.221046] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.221560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.222298] ? __pfx_lock_acquire+0x10/0x10 [ 31.222836] ? __pfx_mmap_region+0x10/0x10 [ 31.223363] ? security_mmap_addr+0x7d/0xa0 [ 31.223895] ? get_unmapped_area+0x1f5/0x3f0 [ 31.224451] do_mmap+0x854/0xf00 [ 31.224900] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.225404] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.225986] ksys_mmap_pgoff+0x3af/0x500 [ 31.226502] do_syscall_64+0x3f/0x90 [ 31.226988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.227649] RIP: 0033:0x7fdbb9ffbd82 [ 31.228119] 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 [ 31.230264] RSP: 002b:00007ffffe62c498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.231172] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbb9ffbd82 [ 31.232024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbb9435000 [ 31.232870] RBP: 00007fdbb9435000 R08: 0000000000000009 R09: 0000000000001000 [ 31.233722] R10: 0000000000000812 R11: 0000000000000206 R12: 00005593836efec0 [ 31.234571] R13: 00007ffffe62c4b0 R14: 00007ffffe62c4e0 R15: 00007ffffe62c840 [ 31.235428] [ 31.235725] [ 31.235940] Allocated by task 214: [ 31.236372] kasan_save_stack+0x22/0x50 [ 31.236883] kasan_set_track+0x25/0x30 [ 31.237381] __kasan_slab_alloc+0x59/0x70 [ 31.237922] kmem_cache_alloc+0x16b/0x370 [ 31.238436] vm_area_dup+0x20/0x160 [ 31.238894] __split_vma+0x170/0x950 [ 31.239391] split_vma+0xc6/0x110 [ 31.239838] mprotect_fixup+0x8d2/0xb30 [ 31.240345] do_mprotect_pkey+0x87e/0xd40 [ 31.240872] __x64_sys_mprotect+0x78/0xc0 [ 31.241399] do_syscall_64+0x3f/0x90 [ 31.241883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.242532] [ 31.242754] Freed by task 214: [ 31.243157] kasan_save_stack+0x22/0x50 [ 31.243657] kasan_set_track+0x25/0x30 [ 31.244159] kasan_save_free_info+0x2b/0x50 [ 31.244697] __kasan_slab_free+0x10a/0x190 [ 31.245232] kmem_cache_free+0x10d/0x4d0 [ 31.245750] rcu_core+0x8c8/0x2860 [ 31.246193] __do_softirq+0x1b7/0x7d4 [ 31.246670] [ 31.246888] Last potentially related work creation: [ 31.247475] kasan_save_stack+0x22/0x50 [ 31.247979] __kasan_record_aux_stack+0x8e/0xa0 [ 31.248654] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.249299] remove_vma+0x139/0x170 [ 31.249762] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.250318] do_vmi_munmap+0x1f1/0x2b0 [ 31.250820] __vm_munmap+0x138/0x3a0 [ 31.251292] __x64_sys_munmap+0x59/0x80 [ 31.251791] do_syscall_64+0x3f/0x90 [ 31.252269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.252908] [ 31.253123] The buggy address belongs to the object at ffff888016614000 [ 31.253123] which belongs to the cache vm_area_struct of size 168 [ 31.254616] The buggy address is located 88 bytes inside of [ 31.254616] freed 168-byte region [ffff888016614000, ffff8880166140a8) [ 31.256036] [ 31.256251] The buggy address belongs to the physical page: [ 31.256919] page:00000000cd3bcde8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16614 [ 31.258039] memcg:ffff88800fb37b01 [ 31.258471] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.259118] page_type: 0xffffffff() [ 31.259571] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.260499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb37b01 [ 31.261409] page dumped because: kasan: bad access detected [ 31.262098] [ 31.262313] Memory state around the buggy address: [ 31.262906] ffff888016613f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.263770] ffff888016613f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.264623] >ffff888016614000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.265488] ^ [ 31.266231] ffff888016614080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.267090] ffff888016614100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.267959] ================================================================== [ 31.268984] Disabling lock debugging due to kernel taint [ 33.465612] BUG: Bad rss-counter state mm:0000000068cf0b9e type:MM_FILEPAGES val:33 [ 33.466619] BUG: Bad rss-counter state mm:0000000068cf0b9e type:MM_ANONPAGES val:22 [ 34.006797] BUG: Bad rss-counter state mm:00000000fe325f21 type:MM_FILEPAGES val:33 [ 34.008024] BUG: Bad rss-counter state mm:00000000fe325f21 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41383' (ECDSA) to the list of known hosts. 2023/06/21 05:05:07 fuzzer started 2023/06/21 05:05:07 dialing manager at localhost:36067 2023/06/21 05:05:07 checking machine... 2023/06/21 05:05:07 checking revisions... [ 34.651312] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:05:07 testing simple program... [ 34.702184] cgroup: Unknown subsys name 'net' [ 34.757430] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:05:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88807ffd7030 RCX=ffffffff811432bc RDX=0000000000000002 RSI=0000000000000000 RDI=0000000000000007 RBP=000000001a3611b0 RSP=ffff88806ce09d78 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=00000000000b6d53 R12=0000000000000000 R13=ffffea000000000f R14=0000000000000002 R15=ffff88801a301730 RIP=ffffffff814c0249 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7c1e10c900 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=00007f7c1d50fd10 CR3=0000000013f48000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c6575ee4e7be0a0200000000000ae988 XMM05=b36ab87f253d95260000000000132688 XMM06=c291bd5c70af25b90000000000131728 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000002200080000 RCX=ffffffff81af8e67 RDX=1ffff11002c5e778 RSI=0000000000000008 RDI=ffff8880162f3bc0 RBP=ffff8880162f3e20 RSP=ffff88800efe7ed8 R8 =0000000000000000 R9 =ffffed1002c5e778 R10=ffff8880162f3bc7 R11=0000000000000000 R12=0000000000000001 R13=ffff88800cb30a00 R14=0000000000000000 R15=ffff8880162f3bc0 RIP=ffffffff81af8e89 RFL=00000246 [---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 00007f33dfecf900 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=00007f33e04870b0 CR3=000000000ea02000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000