syzkaller login: [ 38.950590] BUG: Bad rss-counter state mm:000000009d49a3fb type:MM_FILEPAGES val:33 [ 38.952051] BUG: Bad rss-counter state mm:000000009d49a3fb type:MM_ANONPAGES val:22 [ 39.110668] ================================================================== [ 39.111759] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.113028] Read of size 8 at addr ffff88801a88a968 by task sshd/226 [ 39.113831] [ 39.114060] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.114973] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.115995] Call Trace: [ 39.116340] [ 39.116634] dump_stack_lvl+0x91/0xf0 [ 39.117138] print_report+0xcc/0x620 [ 39.117640] ? __virt_addr_valid+0x102/0x340 [ 39.118212] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.118848] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.119483] kasan_report+0xbe/0xf0 [ 39.119985] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.120666] vma_interval_tree_remove+0xc75/0xec0 [ 39.121289] vma_prepare+0xc54/0x11a0 [ 39.121788] __split_vma+0x5af/0x950 [ 39.122287] ? __pfx___split_vma+0x10/0x10 [ 39.122832] ? find_held_lock+0x2c/0x110 [ 39.123366] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.123952] ? lock_is_held_type+0x9f/0x120 [ 39.124529] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.125150] ? mtree_range_walk+0x632/0x900 [ 39.125733] ? mas_walk+0x5c7/0x7c0 [ 39.126229] do_vmi_munmap+0x1f1/0x2b0 [ 39.126738] mmap_region+0x1f9/0x2660 [ 39.127249] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.127782] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.128540] ? __pfx_lock_acquire+0x10/0x10 [ 39.129090] ? __pfx_mmap_region+0x10/0x10 [ 39.129640] ? security_mmap_addr+0x7d/0xa0 [ 39.130190] ? get_unmapped_area+0x1f5/0x3f0 [ 39.130767] do_mmap+0x854/0xf00 [ 39.131224] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.131744] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.132346] ksys_mmap_pgoff+0x3af/0x500 [ 39.132872] do_syscall_64+0x3f/0x90 [ 39.133373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.134044] RIP: 0033:0x7f62a5877d82 [ 39.134522] 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 [ 39.136724] RSP: 002b:00007ffc627344b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.137661] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f62a5877d82 [ 39.138527] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62a4cb1000 [ 39.139405] RBP: 00007f62a4cb1000 R08: 0000000000000009 R09: 0000000000001000 [ 39.140277] R10: 0000000000000812 R11: 0000000000000206 R12: 000056214d57bf70 [ 39.141146] R13: 00007ffc627344d0 R14: 00007ffc62734500 R15: 00007ffc62734860 [ 39.142014] [ 39.142315] [ 39.142535] Allocated by task 219: [ 39.142969] kasan_save_stack+0x22/0x50 [ 39.143488] kasan_set_track+0x25/0x30 [ 39.143999] __kasan_slab_alloc+0x59/0x70 [ 39.144550] kmem_cache_alloc+0x16b/0x370 [ 39.145080] vm_area_dup+0x20/0x160 [ 39.145544] __split_vma+0x170/0x950 [ 39.146028] split_vma+0xc6/0x110 [ 39.146482] mprotect_fixup+0x8d2/0xb30 [ 39.147003] do_mprotect_pkey+0x87e/0xd40 [ 39.147537] __x64_sys_mprotect+0x78/0xc0 [ 39.148086] do_syscall_64+0x3f/0x90 [ 39.148581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.149237] [ 39.149456] Freed by task 203: [ 39.149856] kasan_save_stack+0x22/0x50 [ 39.150367] kasan_set_track+0x25/0x30 [ 39.150867] kasan_save_free_info+0x2b/0x50 [ 39.151415] __kasan_slab_free+0x10a/0x190 [ 39.151957] kmem_cache_free+0x10d/0x4d0 [ 39.152499] rcu_core+0x8c8/0x2860 [ 39.152951] __do_softirq+0x1b7/0x7d4 [ 39.153441] [ 39.153664] Last potentially related work creation: [ 39.154373] kasan_save_stack+0x22/0x50 [ 39.154885] __kasan_record_aux_stack+0x8e/0xa0 [ 39.155467] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.156126] remove_vma+0x139/0x170 [ 39.156601] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.157171] do_vmi_munmap+0x1f1/0x2b0 [ 39.157663] __vm_munmap+0x138/0x3a0 [ 39.158139] __x64_sys_munmap+0x59/0x80 [ 39.158646] do_syscall_64+0x3f/0x90 [ 39.159137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.159787] [ 39.160004] The buggy address belongs to the object at ffff88801a88a910 [ 39.160004] which belongs to the cache vm_area_struct of size 168 [ 39.161493] The buggy address is located 88 bytes inside of [ 39.161493] freed 168-byte region [ffff88801a88a910, ffff88801a88a9b8) [ 39.162912] [ 39.163130] The buggy address belongs to the physical page: [ 39.163798] page:000000003ace8219 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a88a [ 39.164924] memcg:ffff888019516901 [ 39.165353] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.165998] page_type: 0xffffffff() [ 39.166452] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.167373] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019516901 [ 39.168288] page dumped because: kasan: bad access detected [ 39.168955] [ 39.169172] Memory state around the buggy address: [ 39.169758] ffff88801a88a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.170609] ffff88801a88a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.171464] >ffff88801a88a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.172319] ^ [ 39.173094] ffff88801a88a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.173945] ffff88801a88aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.174790] ================================================================== [ 39.175758] Disabling lock debugging due to kernel taint [ 41.471567] BUG: Bad rss-counter state mm:00000000f4d635e8 type:MM_FILEPAGES val:33 [ 41.472547] BUG: Bad rss-counter state mm:00000000f4d635e8 type:MM_ANONPAGES val:22 [ 41.938937] BUG: Bad rss-counter state mm:000000005656247c type:MM_FILEPAGES val:33 [ 41.939927] BUG: Bad rss-counter state mm:000000005656247c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52039' (ECDSA) to the list of known hosts. 2023/06/21 00:19:29 fuzzer started 2023/06/21 00:19:29 dialing manager at localhost:36067 2023/06/21 00:19:29 checking machine... 2023/06/21 00:19:29 checking revisions... [ 42.720093] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:19:29 testing simple program... [ 42.780023] cgroup: Unknown subsys name 'net' [ 42.840848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:19:29 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffffffff85652d08 RCX=0000000000000000 RDX=ffff888009a58000 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880197efa78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000000000 RIP=ffffffff84511dca RFL=00000293 [--S-A-C] 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 00007f5c3bc53900 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=00007f5c3bc0701c CR3=000000000d9c8000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffc809f8d28 CR3=000000000d7ae000 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=2039323a39313a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3633 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3633325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a39313a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000