syzkaller login: [ 38.627993] BUG: Bad rss-counter state mm:000000007470f8df type:MM_FILEPAGES val:33 [ 38.629500] BUG: Bad rss-counter state mm:000000007470f8df type:MM_ANONPAGES val:22 [ 38.772916] ================================================================== [ 38.773837] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.774798] Read of size 8 at addr ffff88800e16b880 by task sshd/219 [ 38.775575] [ 38.775797] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.776810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.777859] Call Trace: [ 38.778195] [ 38.778500] dump_stack_lvl+0x91/0xf0 [ 38.779006] print_report+0xcc/0x620 [ 38.779501] ? __virt_addr_valid+0x102/0x340 [ 38.780072] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.780708] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.781351] kasan_report+0xbe/0xf0 [ 38.781834] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.782460] vma_interval_tree_remove+0xc75/0xec0 [ 38.783060] vma_prepare+0xc54/0x11a0 [ 38.783542] __split_vma+0x5af/0x950 [ 38.784030] ? __pfx___split_vma+0x10/0x10 [ 38.784574] ? find_held_lock+0x2c/0x110 [ 38.785100] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.785670] ? lock_is_held_type+0x9f/0x120 [ 38.786209] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.786820] ? mtree_range_walk+0x632/0x900 [ 38.787379] ? mas_walk+0x5c7/0x7c0 [ 38.787861] do_vmi_munmap+0x1f1/0x2b0 [ 38.788360] mmap_region+0x1f9/0x2660 [ 38.788861] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.789375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.790096] ? __pfx_lock_acquire+0x10/0x10 [ 38.790654] ? __pfx_mmap_region+0x10/0x10 [ 38.791201] ? security_mmap_addr+0x7d/0xa0 [ 38.791748] ? get_unmapped_area+0x1f5/0x3f0 [ 38.792309] do_mmap+0x854/0xf00 [ 38.792763] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.793273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.793850] ksys_mmap_pgoff+0x3af/0x500 [ 38.794371] do_syscall_64+0x3f/0x90 [ 38.794863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.795521] RIP: 0033:0x7fc57018bd82 [ 38.795980] 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 [ 38.798133] RSP: 002b:00007fff7590afd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.799040] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc57018bd82 [ 38.799902] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc56f5c5000 [ 38.800771] RBP: 00007fc56f5c5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.801631] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba9f833ec0 [ 38.802482] R13: 00007fff7590aff0 R14: 00007fff7590b020 R15: 00007fff7590b380 [ 38.803345] [ 38.803642] [ 38.803858] Allocated by task 212: [ 38.804293] kasan_save_stack+0x22/0x50 [ 38.804823] kasan_set_track+0x25/0x30 [ 38.805317] __kasan_slab_alloc+0x59/0x70 [ 38.805852] kmem_cache_alloc+0x16b/0x370 [ 38.806379] vm_area_dup+0x20/0x160 [ 38.806848] __split_vma+0x170/0x950 [ 38.807324] split_vma+0xc6/0x110 [ 38.807775] mprotect_fixup+0x8d2/0xb30 [ 38.808285] do_mprotect_pkey+0x87e/0xd40 [ 38.808821] __x64_sys_mprotect+0x78/0xc0 [ 38.809353] do_syscall_64+0x3f/0x90 [ 38.809839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.810504] [ 38.810720] Freed by task 203: [ 38.811124] kasan_save_stack+0x22/0x50 [ 38.811634] kasan_set_track+0x25/0x30 [ 38.812137] kasan_save_free_info+0x2b/0x50 [ 38.812688] __kasan_slab_free+0x10a/0x190 [ 38.813222] kmem_cache_free+0x10d/0x4d0 [ 38.813746] rcu_core+0x8c8/0x2860 [ 38.814197] __do_softirq+0x1b7/0x7d4 [ 38.814679] [ 38.814899] Last potentially related work creation: [ 38.815488] kasan_save_stack+0x22/0x50 [ 38.815994] __kasan_record_aux_stack+0x8e/0xa0 [ 38.816588] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.817236] remove_vma+0x139/0x170 [ 38.817697] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.818267] do_vmi_munmap+0x1f1/0x2b0 [ 38.818755] __vm_munmap+0x138/0x3a0 [ 38.819226] __x64_sys_munmap+0x59/0x80 [ 38.819730] do_syscall_64+0x3f/0x90 [ 38.820212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.820874] [ 38.821092] The buggy address belongs to the object at ffff88800e16b828 [ 38.821092] which belongs to the cache vm_area_struct of size 168 [ 38.822580] The buggy address is located 88 bytes inside of [ 38.822580] freed 168-byte region [ffff88800e16b828, ffff88800e16b8d0) [ 38.823996] [ 38.824209] The buggy address belongs to the physical page: [ 38.824876] page:00000000610e4cd2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe16b [ 38.825980] memcg:ffff88800dd39901 [ 38.826413] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.827065] page_type: 0xffffffff() [ 38.827517] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a6380 dead000000000008 [ 38.828458] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd39901 [ 38.829375] page dumped because: kasan: bad access detected [ 38.830044] [ 38.830260] Memory state around the buggy address: [ 38.830841] ffff88800e16b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.831705] ffff88800e16b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.832554] >ffff88800e16b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.833436] ^ [ 38.833857] ffff88800e16b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.834720] ffff88800e16b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 38.835592] ================================================================== [ 38.836924] Disabling lock debugging due to kernel taint [ 40.928849] BUG: Bad rss-counter state mm:000000009e9bb0fc type:MM_FILEPAGES val:33 [ 40.931288] BUG: Bad rss-counter state mm:000000009e9bb0fc type:MM_ANONPAGES val:22 [ 41.407845] BUG: Bad rss-counter state mm:00000000cde7e81a type:MM_FILEPAGES val:33 [ 41.409024] BUG: Bad rss-counter state mm:00000000cde7e81a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59416' (ECDSA) to the list of known hosts. 2023/06/20 20:16:41 fuzzer started 2023/06/20 20:16:42 dialing manager at localhost:36067 2023/06/20 20:16:42 checking machine... 2023/06/20 20:16:42 checking revisions... [ 42.116501] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:16:42 testing simple program... [ 42.162309] cgroup: Unknown subsys name 'net' [ 42.257661] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:16:41 Registers: info registers vcpu 0 RAX=0000001c15eb27ac RBX=0000000000000000 RCX=00000000000006e0 RDX=000000000000001c RSI=ffff88806ce28140 RDI=00000000000534d8 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ee74a R11=0000000000000001 R12=00000000000534d8 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff81106295 RFL=00000012 [----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 00007f7d9b6c7900 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=00007f7d9bc7e618 CR3=000000001ca3a000 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=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 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09a01 RSI=ffff88806cf09a90 RDI=ffff88806cf09aa8 RBP=ffff88806cf09af0 RSP=ffff88806cf099c0 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf02000 R14=ffff88806cf09a98 R15=ffff88806cf09a98 RIP=ffffffff811304d1 RFL=00000282 [--S----] 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=00007f25446662c0 CR3=000000000d5aa000 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=90adc185e7b15d94ed45d7d10d442cf6 XMM02=2c67c8bc2e329bc3000000000011c200 XMM03=fb795ef6d65770560000000000122428 XMM04=c4ce50db2ce4c9ea00000000000ae988 XMM05=dfcdbad4f1609c370000000000131fb8 XMM06=b3a88341c1f823760000000000131190 XMM07=e042d86d42eb936e0000000000122700 XMM08=21e40e49bdb0092e000000000011c260 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000