syzkaller login: [ 31.243321] BUG: Bad rss-counter state mm:00000000d8cd8e38 type:MM_FILEPAGES val:33 [ 31.243967] BUG: Bad rss-counter state mm:00000000d8cd8e38 type:MM_ANONPAGES val:22 [ 31.371967] ================================================================== [ 31.372671] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.373365] Read of size 8 at addr ffff88800f0d0310 by task sshd/220 [ 31.373919] [ 31.374085] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.374718] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.375579] Call Trace: [ 31.375827] [ 31.376261] dump_stack_lvl+0x91/0xf0 [ 31.376626] print_report+0xcc/0x620 [ 31.376980] ? __virt_addr_valid+0x102/0x340 [ 31.377399] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.377831] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.378329] kasan_report+0xbe/0xf0 [ 31.378688] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.379163] vma_interval_tree_remove+0xc75/0xec0 [ 31.379599] vma_prepare+0xc54/0x11a0 [ 31.379951] __split_vma+0x5af/0x950 [ 31.380315] ? __pfx___split_vma+0x10/0x10 [ 31.380701] ? find_held_lock+0x2c/0x110 [ 31.381096] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.381524] ? lock_is_held_type+0x9f/0x120 [ 31.381926] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.382384] ? mtree_range_walk+0x632/0x900 [ 31.382785] ? mas_walk+0x5c7/0x7c0 [ 31.383318] do_vmi_munmap+0x1f1/0x2b0 [ 31.383678] mmap_region+0x1f9/0x2660 [ 31.384046] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.384428] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.384952] ? __pfx_lock_acquire+0x10/0x10 [ 31.385356] ? __pfx_mmap_region+0x10/0x10 [ 31.385741] ? security_mmap_addr+0x7d/0xa0 [ 31.386135] ? get_unmapped_area+0x1f5/0x3f0 [ 31.386544] do_mmap+0x854/0xf00 [ 31.386861] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.387319] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.387735] ksys_mmap_pgoff+0x3af/0x500 [ 31.388089] do_syscall_64+0x3f/0x90 [ 31.388415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.388833] RIP: 0033:0x7f44b7761d82 [ 31.389139] 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 [ 31.390458] RSP: 002b:00007ffc80d7db68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.391141] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f44b7761d82 [ 31.391687] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f44b6b9b000 [ 31.392236] RBP: 00007f44b6b9b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.392765] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555bb7151ec0 [ 31.393316] R13: 00007ffc80d7db80 R14: 00007ffc80d7dbb0 R15: 00007ffc80d7df10 [ 31.393863] [ 31.394053] [ 31.394205] Allocated by task 213: [ 31.394483] kasan_save_stack+0x22/0x50 [ 31.394816] kasan_set_track+0x25/0x30 [ 31.395225] __kasan_slab_alloc+0x59/0x70 [ 31.395563] kmem_cache_alloc+0x16b/0x370 [ 31.395900] vm_area_dup+0x20/0x160 [ 31.396208] __split_vma+0x170/0x950 [ 31.396511] split_vma+0xc6/0x110 [ 31.396793] mprotect_fixup+0x8d2/0xb30 [ 31.397130] do_mprotect_pkey+0x87e/0xd40 [ 31.397459] __x64_sys_mprotect+0x78/0xc0 [ 31.397784] do_syscall_64+0x3f/0x90 [ 31.398096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.398511] [ 31.398640] Freed by task 213: [ 31.398878] kasan_save_stack+0x22/0x50 [ 31.399343] kasan_set_track+0x25/0x30 [ 31.399753] kasan_save_free_info+0x2b/0x50 [ 31.400156] __kasan_slab_free+0x10a/0x190 [ 31.400540] kmem_cache_free+0x10d/0x4d0 [ 31.400872] rcu_core+0x8c8/0x2860 [ 31.401190] __do_softirq+0x1b7/0x7d4 [ 31.401534] [ 31.401695] Last potentially related work creation: [ 31.402049] kasan_save_stack+0x22/0x50 [ 31.402362] __kasan_record_aux_stack+0x8e/0xa0 [ 31.402698] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.403198] remove_vma+0x139/0x170 [ 31.403513] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.403920] do_vmi_munmap+0x1f1/0x2b0 [ 31.404274] __vm_munmap+0x138/0x3a0 [ 31.404609] __x64_sys_munmap+0x59/0x80 [ 31.404965] do_syscall_64+0x3f/0x90 [ 31.405323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.405781] [ 31.405938] The buggy address belongs to the object at ffff88800f0d02b8 [ 31.405938] which belongs to the cache vm_area_struct of size 168 [ 31.407018] The buggy address is located 88 bytes inside of [ 31.407018] freed 168-byte region [ffff88800f0d02b8, ffff88800f0d0360) [ 31.408215] [ 31.408373] The buggy address belongs to the physical page: [ 31.408857] page:000000000d119806 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0d0 [ 31.409644] memcg:ffff888009727e01 [ 31.409957] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.410482] page_type: 0xffffffff() [ 31.410812] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a51c0 dead000000000007 [ 31.411593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009727e01 [ 31.412273] page dumped because: kasan: bad access detected [ 31.412753] [ 31.412907] Memory state around the buggy address: [ 31.413286] ffff88800f0d0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.413822] ffff88800f0d0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.414373] >ffff88800f0d0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.414914] ^ [ 31.415311] ffff88800f0d0380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.415857] ffff88800f0d0400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.416407] ================================================================== [ 31.417295] Disabling lock debugging due to kernel taint [ 35.695043] BUG: Bad rss-counter state mm:00000000d783715a type:MM_FILEPAGES val:33 [ 35.697546] BUG: Bad rss-counter state mm:00000000d783715a type:MM_ANONPAGES val:22 [ 36.719336] BUG: Bad rss-counter state mm:00000000a22ad8f8 type:MM_FILEPAGES val:33 [ 36.727480] BUG: Bad rss-counter state mm:00000000a22ad8f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24132' (ECDSA) to the list of known hosts. 2023/06/21 08:22:03 fuzzer started 2023/06/21 08:22:03 dialing manager at localhost:36067 2023/06/21 08:22:03 checking machine... 2023/06/21 08:22:03 checking revisions... [ 37.557614] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:22:03 testing simple program... [ 37.613911] cgroup: Unknown subsys name 'net' [ 37.666625] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:22:03 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffffffff85407ee8 RSI=ffffffff85407ed0 RDI=ffff88806ce09aa8 RBP=ffffffff85400000 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000baa4 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407ed0 R15=ffff88806ce09a98 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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 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=00007f4ad9482430 CR3=000000000cc08000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=2d65f553ca2c4dec0000000000132958 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=c6fa146caeb65af100000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010001 RBX=ffff88806cf2c240 RCX=0000000080010001 RDX=ffff888008d951c0 RSI=ffffffff813c91b7 RDI=0000000000000001 RBP=0000000000000004 RSP=ffff88806cf09f70 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000004 R11=ffff88806cf09ff8 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0871 RFL=00000086 [--S--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 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=0000556c8d8944d0 CR3=00000000195ba000 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=00000000000000000000000000000000 XMM01=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000