syzkaller login: [ 31.242659] BUG: Bad rss-counter state mm:0000000093812fc0 type:MM_FILEPAGES val:33 [ 31.243879] BUG: Bad rss-counter state mm:0000000093812fc0 type:MM_ANONPAGES val:22 [ 31.280644] ================================================================== [ 31.281717] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.282645] Read of size 8 at addr ffff88800d84eb38 by task sshd/219 [ 31.283399] [ 31.283617] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.284472] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.285470] Call Trace: [ 31.285789] [ 31.286074] dump_stack_lvl+0x91/0xf0 [ 31.286564] print_report+0xcc/0x620 [ 31.287052] ? __virt_addr_valid+0x102/0x340 [ 31.287605] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288209] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288842] kasan_report+0xbe/0xf0 [ 31.289322] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.289947] vma_interval_tree_remove+0xc75/0xec0 [ 31.290550] vma_prepare+0xc54/0x11a0 [ 31.291030] __split_vma+0x5af/0x950 [ 31.291497] ? __pfx___split_vma+0x10/0x10 [ 31.292028] ? find_held_lock+0x2c/0x110 [ 31.292550] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.293120] ? lock_is_held_type+0x9f/0x120 [ 31.293666] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.294286] ? mtree_range_walk+0x632/0x900 [ 31.294839] ? mas_walk+0x5c7/0x7c0 [ 31.295322] do_vmi_munmap+0x1f1/0x2b0 [ 31.295808] mmap_region+0x1f9/0x2660 [ 31.296291] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.296827] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.297542] ? __pfx_lock_acquire+0x10/0x10 [ 31.298066] ? __pfx_mmap_region+0x10/0x10 [ 31.298594] ? security_mmap_addr+0x7d/0xa0 [ 31.299122] ? get_unmapped_area+0x1f5/0x3f0 [ 31.299681] do_mmap+0x854/0xf00 [ 31.300122] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.300620] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.301188] ksys_mmap_pgoff+0x3af/0x500 [ 31.301696] do_syscall_64+0x3f/0x90 [ 31.302174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.302825] RIP: 0033:0x7f18c7dfbd82 [ 31.303277] 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 [ 31.305461] RSP: 002b:00007ffc182fd7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.306357] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18c7dfbd82 [ 31.307225] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18c7235000 [ 31.308231] RBP: 00007f18c7235000 R08: 0000000000000009 R09: 0000000000001000 [ 31.309120] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c0ede4ec0 [ 31.309987] R13: 00007ffc182fd7f0 R14: 00007ffc182fd820 R15: 00007ffc182fdb80 [ 31.310864] [ 31.311158] [ 31.311370] Allocated by task 212: [ 31.311806] kasan_save_stack+0x22/0x50 [ 31.312310] kasan_set_track+0x25/0x30 [ 31.312824] __kasan_slab_alloc+0x59/0x70 [ 31.313352] kmem_cache_alloc+0x16b/0x370 [ 31.313865] vm_area_dup+0x20/0x160 [ 31.314321] __split_vma+0x170/0x950 [ 31.314793] split_vma+0xc6/0x110 [ 31.315232] mprotect_fixup+0x8d2/0xb30 [ 31.315732] do_mprotect_pkey+0x87e/0xd40 [ 31.316248] __x64_sys_mprotect+0x78/0xc0 [ 31.316766] do_syscall_64+0x3f/0x90 [ 31.317245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317891] [ 31.318103] Freed by task 212: [ 31.318497] kasan_save_stack+0x22/0x50 [ 31.319000] kasan_set_track+0x25/0x30 [ 31.319499] kasan_save_free_info+0x2b/0x50 [ 31.320028] __kasan_slab_free+0x10a/0x190 [ 31.320562] kmem_cache_free+0x10d/0x4d0 [ 31.321080] rcu_core+0x8c8/0x2860 [ 31.321519] __do_softirq+0x1b7/0x7d4 [ 31.321997] [ 31.322211] Last potentially related work creation: [ 31.322793] kasan_save_stack+0x22/0x50 [ 31.323300] __kasan_record_aux_stack+0x8e/0xa0 [ 31.323874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.324517] remove_vma+0x139/0x170 [ 31.324983] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.325539] do_vmi_munmap+0x1f1/0x2b0 [ 31.326021] __vm_munmap+0x138/0x3a0 [ 31.326479] __x64_sys_munmap+0x59/0x80 [ 31.326975] do_syscall_64+0x3f/0x90 [ 31.327446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.328085] [ 31.328301] Second to last potentially related work creation: [ 31.328985] kasan_save_stack+0x22/0x50 [ 31.329484] __kasan_record_aux_stack+0x8e/0xa0 [ 31.330054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.330711] remove_vma+0x139/0x170 [ 31.331155] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.331705] do_vmi_munmap+0x1f1/0x2b0 [ 31.332189] mmap_region+0x1f9/0x2660 [ 31.332663] do_mmap+0x854/0xf00 [ 31.333116] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.333604] ksys_mmap_pgoff+0x3af/0x500 [ 31.334119] do_syscall_64+0x3f/0x90 [ 31.334613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.335260] [ 31.335472] The buggy address belongs to the object at ffff88800d84eae0 [ 31.335472] which belongs to the cache vm_area_struct of size 168 [ 31.336949] The buggy address is located 88 bytes inside of [ 31.336949] freed 168-byte region [ffff88800d84eae0, ffff88800d84eb88) [ 31.338338] [ 31.338553] The buggy address belongs to the physical page: [ 31.339208] page:000000009682ca6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd84e [ 31.340287] memcg:ffff88800c987b01 [ 31.340730] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.341381] page_type: 0xffffffff() [ 31.341835] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.342751] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c987b01 [ 31.343653] page dumped because: kasan: bad access detected [ 31.344314] [ 31.344539] Memory state around the buggy address: [ 31.345127] ffff88800d84ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.345988] ffff88800d84ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.346851] >ffff88800d84eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.347697] ^ [ 31.348301] ffff88800d84eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.349153] ffff88800d84ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.350001] ================================================================== [ 31.351033] Disabling lock debugging due to kernel taint [ 33.180348] BUG: Bad rss-counter state mm:0000000021bd09d3 type:MM_FILEPAGES val:33 [ 33.181571] BUG: Bad rss-counter state mm:0000000021bd09d3 type:MM_ANONPAGES val:22 [ 33.668418] BUG: Bad rss-counter state mm:0000000055c057b5 type:MM_FILEPAGES val:33 [ 33.669596] BUG: Bad rss-counter state mm:0000000055c057b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24494' (ECDSA) to the list of known hosts. 2023/06/20 19:12:22 fuzzer started 2023/06/20 19:12:23 dialing manager at localhost:36067 2023/06/20 19:12:23 checking machine... 2023/06/20 19:12:23 checking revisions... [ 34.385873] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:12:23 testing simple program... [ 34.434338] cgroup: Unknown subsys name 'net' [ 34.485595] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:12:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888015cd7810 RSI=ffffffff8363e064 RDI=ffff888015cd7810 RBP=ffff888015cd78a8 RSP=ffff888015cd77f8 R8 =0000000000000001 R9 =ffff888015cd7850 R10=0000000000038001 R11=000000000008a88c R12=ffff888015cd78d8 R13=0000000000000000 R14=ffff88800c7551c0 R15=ffff888015cd7810 RIP=ffffffff811305e8 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 00007f685e34d900 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=00007f685e904618 CR3=000000000c5c0000 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=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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f46d2c2b7b0 CR3=000000000f5e4000 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=c6130a05b8b0bc83324297a5d7cb3c34 XMM02=2c67c8bc2e329bc3000000000011de28 XMM03=fb795ef6d657705600000000001225c8 XMM04=623b82308eaa5c4000000000000ae988 XMM05=dfcdbad4f1609c370000000000133788 XMM06=5b0ad8b926df708400000000001325f0 XMM07=e042d86d42eb936e0000000000122848 XMM08=85af166e72431b55000000000011de88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000