syzkaller login: [ 31.414820] BUG: Bad rss-counter state mm:0000000040e34ba1 type:MM_FILEPAGES val:33 [ 31.416033] BUG: Bad rss-counter state mm:0000000040e34ba1 type:MM_ANONPAGES val:22 [ 31.460380] ================================================================== [ 31.461416] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.462441] Read of size 8 at addr ffff8880166e0a50 by task sshd/220 [ 31.463271] [ 31.463511] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.464473] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.465575] Call Trace: [ 31.465924] [ 31.466236] dump_stack_lvl+0x91/0xf0 [ 31.466761] print_report+0xcc/0x620 [ 31.467288] ? __virt_addr_valid+0x102/0x340 [ 31.467880] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.468600] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.469280] kasan_report+0xbe/0xf0 [ 31.469822] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.470532] vma_interval_tree_remove+0xc75/0xec0 [ 31.471218] vma_prepare+0xc54/0x11a0 [ 31.471758] __split_vma+0x5af/0x950 [ 31.472312] ? __pfx___split_vma+0x10/0x10 [ 31.472923] ? find_held_lock+0x2c/0x110 [ 31.473517] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.474146] ? lock_is_held_type+0x9f/0x120 [ 31.474763] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.475451] ? mtree_range_walk+0x632/0x900 [ 31.476067] ? mas_walk+0x5c7/0x7c0 [ 31.476636] do_vmi_munmap+0x1f1/0x2b0 [ 31.477204] mmap_region+0x1f9/0x2660 [ 31.477752] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.478332] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.479140] ? __pfx_lock_acquire+0x10/0x10 [ 31.479742] ? __pfx_mmap_region+0x10/0x10 [ 31.480368] ? security_mmap_addr+0x7d/0xa0 [ 31.480987] ? get_unmapped_area+0x1f5/0x3f0 [ 31.481600] do_mmap+0x854/0xf00 [ 31.482091] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.482640] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.483273] ksys_mmap_pgoff+0x3af/0x500 [ 31.483847] do_syscall_64+0x3f/0x90 [ 31.484414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.485173] RIP: 0033:0x7fcd58e4ed82 [ 31.485695] 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 [ 31.488124] RSP: 002b:00007fff7bfee378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.489185] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd58e4ed82 [ 31.490140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd58288000 [ 31.491091] RBP: 00007fcd58288000 R08: 0000000000000009 R09: 0000000000001000 [ 31.492042] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec2f680ec0 [ 31.493035] R13: 00007fff7bfee390 R14: 00007fff7bfee3c0 R15: 00007fff7bfee720 [ 31.494006] [ 31.494328] [ 31.494557] Allocated by task 213: [ 31.495038] kasan_save_stack+0x22/0x50 [ 31.495607] kasan_set_track+0x25/0x30 [ 31.496142] __kasan_slab_alloc+0x59/0x70 [ 31.496761] kmem_cache_alloc+0x16b/0x370 [ 31.497320] vm_area_dup+0x20/0x160 [ 31.497837] __split_vma+0x170/0x950 [ 31.498352] split_vma+0xc6/0x110 [ 31.498845] mprotect_fixup+0x8d2/0xb30 [ 31.499395] do_mprotect_pkey+0x87e/0xd40 [ 31.499971] __x64_sys_mprotect+0x78/0xc0 [ 31.500567] do_syscall_64+0x3f/0x90 [ 31.501094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.501820] [ 31.502074] Freed by task 213: [ 31.502510] kasan_save_stack+0x22/0x50 [ 31.503050] kasan_set_track+0x25/0x30 [ 31.503606] kasan_save_free_info+0x2b/0x50 [ 31.504199] __kasan_slab_free+0x10a/0x190 [ 31.504829] kmem_cache_free+0x10d/0x4d0 [ 31.505396] rcu_core+0x8c8/0x2860 [ 31.505885] __do_softirq+0x1b7/0x7d4 [ 31.506420] [ 31.506658] Last potentially related work creation: [ 31.507315] kasan_save_stack+0x22/0x50 [ 31.507873] __kasan_record_aux_stack+0x8e/0xa0 [ 31.508541] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.509275] remove_vma+0x139/0x170 [ 31.509779] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.510403] do_vmi_munmap+0x1f1/0x2b0 [ 31.510935] __vm_munmap+0x138/0x3a0 [ 31.511455] __x64_sys_munmap+0x59/0x80 [ 31.512003] do_syscall_64+0x3f/0x90 [ 31.512556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.513312] [ 31.513556] Second to last potentially related work creation: [ 31.514327] kasan_save_stack+0x22/0x50 [ 31.514886] __kasan_record_aux_stack+0x8e/0xa0 [ 31.515524] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.516259] remove_vma+0x139/0x170 [ 31.516792] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.517415] do_vmi_munmap+0x1f1/0x2b0 [ 31.517963] mmap_region+0x1f9/0x2660 [ 31.518505] do_mmap+0x854/0xf00 [ 31.518985] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.519534] ksys_mmap_pgoff+0x3af/0x500 [ 31.520104] do_syscall_64+0x3f/0x90 [ 31.520681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.521433] [ 31.521689] The buggy address belongs to the object at ffff8880166e09f8 [ 31.521689] which belongs to the cache vm_area_struct of size 168 [ 31.523379] The buggy address is located 88 bytes inside of [ 31.523379] freed 168-byte region [ffff8880166e09f8, ffff8880166e0aa0) [ 31.525001] [ 31.525271] The buggy address belongs to the physical page: [ 31.526043] page:000000006d9823f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166e0 [ 31.527313] memcg:ffff888019deee01 [ 31.527803] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.528549] page_type: 0xffffffff() [ 31.529072] raw: 0100000000000200 ffff88800879fc80 ffffea000059bac0 dead000000000006 [ 31.530155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019deee01 [ 31.531185] page dumped because: kasan: bad access detected [ 31.531946] [ 31.532188] Memory state around the buggy address: [ 31.532876] ffff8880166e0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.533865] ffff8880166e0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.534841] >ffff8880166e0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.535804] ^ [ 31.536601] ffff8880166e0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.537589] ffff8880166e0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.538548] ================================================================== [ 31.540154] Disabling lock debugging due to kernel taint [ 33.555326] BUG: Bad rss-counter state mm:00000000b7ab8350 type:MM_FILEPAGES val:33 [ 33.556463] BUG: Bad rss-counter state mm:00000000b7ab8350 type:MM_ANONPAGES val:22 [ 34.008416] BUG: Bad rss-counter state mm:000000007bf8fe22 type:MM_FILEPAGES val:33 [ 34.009612] BUG: Bad rss-counter state mm:000000007bf8fe22 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8716' (ECDSA) to the list of known hosts. 2023/06/20 08:27:40 fuzzer started 2023/06/20 08:27:40 dialing manager at localhost:44161 2023/06/20 08:27:40 checking machine... 2023/06/20 08:27:40 checking revisions... [ 34.625144] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:27:41 testing simple program... [ 34.673919] cgroup: Unknown subsys name 'net' [ 34.778944] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:27:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=1ffffffff0ba7a02 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002054eab RSP=ffff8880102a7548 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856cd420 R13=ffffffff81787baa R14=0000000000400cc0 R15=ffffffff818470dc RIP=ffffffff812d86c0 RFL=00000212 [----A--] 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 00007f7dc7a30900 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=00007f1a53cda650 CR3=000000000d644000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f882380a9918a44300000000000ae988 XMM05=fe548b77bb5cd55f0000000000136a98 XMM06=b79bbc61d5befcd00000000000135838 XMM07=fb795ef6d65770560000000000124a08 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffff67bfe78 CR3=0000000013a52000 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=37323a3830203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030343a3732 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323330 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000