syzkaller login: [ 60.634075] BUG: Bad rss-counter state mm:00000000f0126883 type:MM_FILEPAGES val:33 [ 60.634831] BUG: Bad rss-counter state mm:00000000f0126883 type:MM_ANONPAGES val:22 [ 60.815729] ================================================================== [ 60.816423] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.817137] Read of size 8 at addr ffff888018155798 by task sshd/226 [ 60.817723] [ 60.817889] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.818565] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.819326] Call Trace: [ 60.819601] [ 60.819825] dump_stack_lvl+0x91/0xf0 [ 60.820200] print_report+0xcc/0x620 [ 60.820577] ? __virt_addr_valid+0x102/0x340 [ 60.821003] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.821479] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.821982] kasan_report+0xbe/0xf0 [ 60.822377] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.822854] vma_interval_tree_remove+0xc75/0xec0 [ 60.823333] vma_prepare+0xc54/0x11a0 [ 60.823716] __split_vma+0x5af/0x950 [ 60.824080] ? __pfx___split_vma+0x10/0x10 [ 60.824490] ? find_held_lock+0x2c/0x110 [ 60.824893] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.825331] ? lock_is_held_type+0x9f/0x120 [ 60.825750] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.826230] ? mtree_range_walk+0x632/0x900 [ 60.826655] ? mas_walk+0x5c7/0x7c0 [ 60.827017] do_vmi_munmap+0x1f1/0x2b0 [ 60.827393] mmap_region+0x1f9/0x2660 [ 60.827767] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.828165] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.828713] ? __pfx_lock_acquire+0x10/0x10 [ 60.829121] ? __pfx_mmap_region+0x10/0x10 [ 60.829528] ? security_mmap_addr+0x7d/0xa0 [ 60.829941] ? get_unmapped_area+0x1f5/0x3f0 [ 60.830378] do_mmap+0x854/0xf00 [ 60.830718] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.831098] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.831524] ksys_mmap_pgoff+0x3af/0x500 [ 60.831916] do_syscall_64+0x3f/0x90 [ 60.832289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.832789] RIP: 0033:0x7f0a6d3bcd82 [ 60.833138] 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 [ 60.834788] RSP: 002b:00007ffcc8c2f4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.835488] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a6d3bcd82 [ 60.836142] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a6c7f6000 [ 60.836794] RBP: 00007f0a6c7f6000 R08: 0000000000000009 R09: 0000000000001000 [ 60.837447] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561cde873ec0 [ 60.838101] R13: 00007ffcc8c2f500 R14: 00007ffcc8c2f530 R15: 00007ffcc8c2f890 [ 60.838786] [ 60.839012] [ 60.839178] Allocated by task 219: [ 60.839508] kasan_save_stack+0x22/0x50 [ 60.839894] kasan_set_track+0x25/0x30 [ 60.840273] __kasan_slab_alloc+0x59/0x70 [ 60.840674] kmem_cache_alloc+0x16b/0x370 [ 60.841072] vm_area_dup+0x20/0x160 [ 60.841424] __split_vma+0x170/0x950 [ 60.841783] split_vma+0xc6/0x110 [ 60.842120] mprotect_fixup+0x8d2/0xb30 [ 60.842515] do_mprotect_pkey+0x87e/0xd40 [ 60.842923] __x64_sys_mprotect+0x78/0xc0 [ 60.843329] do_syscall_64+0x3f/0x90 [ 60.843693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.844187] [ 60.844352] Freed by task 19: [ 60.844652] kasan_save_stack+0x22/0x50 [ 60.845041] kasan_set_track+0x25/0x30 [ 60.845424] kasan_save_free_info+0x2b/0x50 [ 60.845833] __kasan_slab_free+0x10a/0x190 [ 60.846249] kmem_cache_free+0x10d/0x4d0 [ 60.846640] rcu_core+0x8c8/0x2860 [ 60.846987] __do_softirq+0x1b7/0x7d4 [ 60.847359] [ 60.847524] Last potentially related work creation: [ 60.847976] kasan_save_stack+0x22/0x50 [ 60.848367] __kasan_record_aux_stack+0x8e/0xa0 [ 60.848806] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.849300] remove_vma+0x139/0x170 [ 60.849656] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.850091] do_vmi_munmap+0x1f1/0x2b0 [ 60.850481] __vm_munmap+0x138/0x3a0 [ 60.850848] __x64_sys_munmap+0x59/0x80 [ 60.851236] do_syscall_64+0x3f/0x90 [ 60.851601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.852096] [ 60.852263] The buggy address belongs to the object at ffff888018155740 [ 60.852263] which belongs to the cache vm_area_struct of size 168 [ 60.853465] The buggy address is located 88 bytes inside of [ 60.853465] freed 168-byte region [ffff888018155740, ffff8880181557e8) [ 60.854581] [ 60.854747] The buggy address belongs to the physical page: [ 60.855258] page:00000000bd7fe8cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18155 [ 60.856099] memcg:ffff88801a1d2b01 [ 60.856426] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.856926] page_type: 0xffffffff() [ 60.857272] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.857977] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1d2b01 [ 60.858698] page dumped because: kasan: bad access detected [ 60.859208] [ 60.859375] Memory state around the buggy address: [ 60.859821] ffff888018155680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.860484] ffff888018155700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 60.861144] >ffff888018155780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 60.861803] ^ [ 60.862187] ffff888018155800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 60.862852] ffff888018155880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 60.863512] ================================================================== [ 60.864257] Disabling lock debugging due to kernel taint [ 62.713667] BUG: Bad rss-counter state mm:00000000dba37d1e type:MM_FILEPAGES val:33 [ 62.714648] BUG: Bad rss-counter state mm:00000000dba37d1e type:MM_ANONPAGES val:22 [ 63.161499] BUG: Bad rss-counter state mm:00000000fbfcbb00 type:MM_FILEPAGES val:33 [ 63.162526] BUG: Bad rss-counter state mm:00000000fbfcbb00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35988' (ECDSA) to the list of known hosts. 2023/06/20 03:18:12 fuzzer started 2023/06/20 03:18:12 dialing manager at localhost:44161 2023/06/20 03:18:12 checking machine... 2023/06/20 03:18:12 checking revisions... [ 63.851822] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:18:12 testing simple program... [ 63.898542] cgroup: Unknown subsys name 'net' [ 63.953805] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:18:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff81894b1b RDX=ffff88800e96b680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888015acd1a8 RSP=ffff88801036f880 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000002 R14=ffffffff856f0b20 R15=ffff88801036fd36 RIP=ffffffff814c07e4 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7025b25900 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=00007f2ded188650 CR3=000000000d5f6000 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=9c0fc6a5fba5fe2800000000000ae988 XMM05=5a428c648d3faa5600000000001352f0 XMM06=13e856d8d71426c800000000001340e0 XMM07=fb795ef6d65770560000000000124708 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888017c58000 RBX=ffff888017c578c8 RCX=0000000000000001 RDX=1ffff11002f8af1b RSI=ffff888017c57c20 RDI=ffff888017c578d8 RBP=ffff888017c57c20 RSP=ffff888017c57820 R8 =0000000000000001 R9 =ffff888017c57908 R10=0000000000038001 R11=0000000000020ed0 R12=0000000000000008 R13=ffff888017c50000 R14=ffff888017c57c20 R15=ffff888017c578c8 RIP=ffffffff81130472 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 00007f2decbd3900 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=00007f2ded18a618 CR3=0000000017dc8000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000