syzkaller login: [ 31.105412] BUG: Bad rss-counter state mm:0000000024f9aad8 type:MM_FILEPAGES val:33 [ 31.106451] BUG: Bad rss-counter state mm:0000000024f9aad8 type:MM_ANONPAGES val:22 [ 31.279033] ================================================================== [ 31.279947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.280892] Read of size 8 at addr ffff88800cbfbd08 by task sshd/221 [ 31.281764] [ 31.282025] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.282938] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.283980] Call Trace: [ 31.284340] [ 31.284664] dump_stack_lvl+0x91/0xf0 [ 31.285230] print_report+0xcc/0x620 [ 31.285804] ? __virt_addr_valid+0x102/0x340 [ 31.286465] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287207] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287954] kasan_report+0xbe/0xf0 [ 31.288521] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.289265] vma_interval_tree_remove+0xc75/0xec0 [ 31.289991] vma_prepare+0xc54/0x11a0 [ 31.290561] __split_vma+0x5af/0x950 [ 31.291131] ? __pfx___split_vma+0x10/0x10 [ 31.291767] ? find_held_lock+0x2c/0x110 [ 31.292380] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.293058] ? lock_is_held_type+0x9f/0x120 [ 31.293701] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.294432] ? mtree_range_walk+0x632/0x900 [ 31.295122] ? mas_walk+0x5c7/0x7c0 [ 31.295684] do_vmi_munmap+0x1f1/0x2b0 [ 31.296277] mmap_region+0x1f9/0x2660 [ 31.296860] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.297474] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.298349] ? __pfx_lock_acquire+0x10/0x10 [ 31.299005] ? __pfx_mmap_region+0x10/0x10 [ 31.299641] ? security_mmap_addr+0x7d/0xa0 [ 31.300304] ? get_unmapped_area+0x1f5/0x3f0 [ 31.300973] do_mmap+0x854/0xf00 [ 31.301509] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.302106] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.302796] ksys_mmap_pgoff+0x3af/0x500 [ 31.303412] do_syscall_64+0x3f/0x90 [ 31.303981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.304758] RIP: 0033:0x7f5767bf9d82 [ 31.305306] 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 [ 31.307900] RSP: 002b:00007ffc9c1da678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.309003] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5767bf9d82 [ 31.310026] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5767033000 [ 31.311060] RBP: 00007f5767033000 R08: 0000000000000009 R09: 0000000000001000 [ 31.312094] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648f3280d90 [ 31.313115] R13: 00007ffc9c1da690 R14: 00007ffc9c1da6c0 R15: 00007ffc9c1daa20 [ 31.314148] [ 31.314491] [ 31.314756] Allocated by task 214: [ 31.315272] kasan_save_stack+0x22/0x50 [ 31.315880] kasan_set_track+0x25/0x30 [ 31.316474] __kasan_slab_alloc+0x59/0x70 [ 31.317097] kmem_cache_alloc+0x16b/0x370 [ 31.317717] vm_area_dup+0x20/0x160 [ 31.318255] __split_vma+0x170/0x950 [ 31.318832] split_vma+0xc6/0x110 [ 31.319363] mprotect_fixup+0x8d2/0xb30 [ 31.319969] do_mprotect_pkey+0x87e/0xd40 [ 31.320592] __x64_sys_mprotect+0x78/0xc0 [ 31.321221] do_syscall_64+0x3f/0x90 [ 31.321787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.322544] [ 31.322803] Freed by task 214: [ 31.323342] kasan_save_stack+0x22/0x50 [ 31.323939] kasan_set_track+0x25/0x30 [ 31.324528] kasan_save_free_info+0x2b/0x50 [ 31.325163] __kasan_slab_free+0x10a/0x190 [ 31.325810] kmem_cache_free+0x10d/0x4d0 [ 31.326404] rcu_core+0x8c8/0x2860 [ 31.326952] __do_softirq+0x1b7/0x7d4 [ 31.327515] [ 31.327768] Last potentially related work creation: [ 31.328466] kasan_save_stack+0x22/0x50 [ 31.329057] __kasan_record_aux_stack+0x8e/0xa0 [ 31.329739] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.330499] remove_vma+0x139/0x170 [ 31.331036] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.331694] do_vmi_munmap+0x1f1/0x2b0 [ 31.332271] __vm_munmap+0x138/0x3a0 [ 31.332825] __x64_sys_munmap+0x59/0x80 [ 31.333411] do_syscall_64+0x3f/0x90 [ 31.333981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.334736] [ 31.334987] The buggy address belongs to the object at ffff88800cbfbcb0 [ 31.334987] which belongs to the cache vm_area_struct of size 168 [ 31.336756] The buggy address is located 88 bytes inside of [ 31.336756] freed 168-byte region [ffff88800cbfbcb0, ffff88800cbfbd58) [ 31.338436] [ 31.338700] The buggy address belongs to the physical page: [ 31.339486] page:000000008c973cec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbfb [ 31.340779] memcg:ffff88801445ec01 [ 31.341288] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.342065] page_type: 0xffffffff() [ 31.342609] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.343695] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801445ec01 [ 31.344763] page dumped because: kasan: bad access detected [ 31.345547] [ 31.345797] Memory state around the buggy address: [ 31.346482] ffff88800cbfbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.347500] ffff88800cbfbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.348513] >ffff88800cbfbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.349514] ^ [ 31.350033] ffff88800cbfbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.351038] ffff88800cbfbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.352049] ================================================================== [ 31.353218] Disabling lock debugging due to kernel taint [ 34.100944] BUG: Bad rss-counter state mm:00000000a13d9ed7 type:MM_FILEPAGES val:33 [ 34.101923] BUG: Bad rss-counter state mm:00000000a13d9ed7 type:MM_ANONPAGES val:22 [ 34.681271] BUG: Bad rss-counter state mm:00000000db7f78c2 type:MM_FILEPAGES val:33 [ 34.682424] BUG: Bad rss-counter state mm:00000000db7f78c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29552' (ECDSA) to the list of known hosts. 2023/06/21 07:32:31 fuzzer started 2023/06/21 07:32:31 dialing manager at localhost:36067 2023/06/21 07:32:31 checking machine... 2023/06/21 07:32:31 checking revisions... [ 35.313817] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:32:31 testing simple program... [ 35.363388] cgroup: Unknown subsys name 'net' [ 35.401346] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:32:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018f43680 RCX=0000000000000000 RDX=1ffff110031e86d3 RSI=00000000000000fe RDI=ffff888018f43698 RBP=ffffffff849be800 RSP=ffff88801c9d7c80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000000 R12=00000000000000fe R13=ffff88800f0a2b90 R14=0000000000000001 R15=ffff88801bc8c808 RIP=ffffffff8122ea14 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 00007f01d1aa5900 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=00007f01d205a650 CR3=000000000f876000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=000000ff000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=706d6f63206d687469726f676c612023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85652c08 RCX=0000000000000000 RDX=ffff8880144e3680 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800d8373e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff8880160dbe78 RIP=ffffffff84511dd4 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 00007f877bac3900 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=00007f877aecee90 CR3=000000000a25c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1d1a4c067402508d00000000000ae988 XMM05=b20c116b0079c6470000000000132138 XMM06=00c3ffa147b8d8570000000000130f28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000