syzkaller login: [ 30.443783] BUG: Bad rss-counter state mm:000000004c3a7274 type:MM_FILEPAGES val:33 [ 30.445257] BUG: Bad rss-counter state mm:000000004c3a7274 type:MM_ANONPAGES val:22 [ 30.613168] ================================================================== [ 30.614089] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.615026] Read of size 8 at addr ffff88801a00a3f8 by task sshd/219 [ 30.615799] [ 30.616020] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.617012] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.617998] Call Trace: [ 30.618348] [ 30.618641] dump_stack_lvl+0x91/0xf0 [ 30.619153] print_report+0xcc/0x620 [ 30.619649] ? __virt_addr_valid+0x102/0x340 [ 30.620202] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.620822] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.621439] kasan_report+0xbe/0xf0 [ 30.621920] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.622569] vma_interval_tree_remove+0xc75/0xec0 [ 30.623172] vma_prepare+0xc54/0x11a0 [ 30.623651] __split_vma+0x5af/0x950 [ 30.624121] ? __pfx___split_vma+0x10/0x10 [ 30.624650] ? find_held_lock+0x2c/0x110 [ 30.625170] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.625749] ? lock_is_held_type+0x9f/0x120 [ 30.626303] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.626912] ? mtree_range_walk+0x632/0x900 [ 30.627462] ? mas_walk+0x5c7/0x7c0 [ 30.627934] do_vmi_munmap+0x1f1/0x2b0 [ 30.628432] mmap_region+0x1f9/0x2660 [ 30.628914] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.629426] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.630147] ? __pfx_lock_acquire+0x10/0x10 [ 30.630676] ? __pfx_mmap_region+0x10/0x10 [ 30.631209] ? security_mmap_addr+0x7d/0xa0 [ 30.631739] ? get_unmapped_area+0x1f5/0x3f0 [ 30.632282] do_mmap+0x854/0xf00 [ 30.632726] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.633222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.633778] ksys_mmap_pgoff+0x3af/0x500 [ 30.634299] do_syscall_64+0x3f/0x90 [ 30.634781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.635428] RIP: 0033:0x7fb9d1ee7d82 [ 30.635921] 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 [ 30.638117] RSP: 002b:00007ffc7d585d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.639011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9d1ee7d82 [ 30.639852] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9d1321000 [ 30.640698] RBP: 00007fb9d1321000 R08: 0000000000000009 R09: 0000000000001000 [ 30.641539] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a88f6e2ec0 [ 30.642389] R13: 00007ffc7d585d90 R14: 00007ffc7d585dc0 R15: 00007ffc7d586120 [ 30.643250] [ 30.643541] [ 30.643757] Allocated by task 212: [ 30.644183] kasan_save_stack+0x22/0x50 [ 30.644688] kasan_set_track+0x25/0x30 [ 30.645177] __kasan_slab_alloc+0x59/0x70 [ 30.645704] kmem_cache_alloc+0x16b/0x370 [ 30.646238] vm_area_dup+0x20/0x160 [ 30.646692] __split_vma+0x170/0x950 [ 30.647153] split_vma+0xc6/0x110 [ 30.647590] mprotect_fixup+0x8d2/0xb30 [ 30.648086] do_mprotect_pkey+0x87e/0xd40 [ 30.648607] __x64_sys_mprotect+0x78/0xc0 [ 30.649121] do_syscall_64+0x3f/0x90 [ 30.649595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.650242] [ 30.650458] Freed by task 202: [ 30.650851] kasan_save_stack+0x22/0x50 [ 30.651358] kasan_set_track+0x25/0x30 [ 30.651856] kasan_save_free_info+0x2b/0x50 [ 30.652386] __kasan_slab_free+0x10a/0x190 [ 30.652916] kmem_cache_free+0x10d/0x4d0 [ 30.653418] rcu_core+0x8c8/0x2860 [ 30.653856] __do_softirq+0x1b7/0x7d4 [ 30.654346] [ 30.654562] Last potentially related work creation: [ 30.655140] kasan_save_stack+0x22/0x50 [ 30.655642] __kasan_record_aux_stack+0x8e/0xa0 [ 30.656213] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.656850] remove_vma+0x139/0x170 [ 30.657347] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.657923] do_vmi_munmap+0x1f1/0x2b0 [ 30.658414] __vm_munmap+0x138/0x3a0 [ 30.658884] __x64_sys_munmap+0x59/0x80 [ 30.659380] do_syscall_64+0x3f/0x90 [ 30.659854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.660500] [ 30.660720] The buggy address belongs to the object at ffff88801a00a3a0 [ 30.660720] which belongs to the cache vm_area_struct of size 168 [ 30.662177] The buggy address is located 88 bytes inside of [ 30.662177] freed 168-byte region [ffff88801a00a3a0, ffff88801a00a448) [ 30.663574] [ 30.663791] The buggy address belongs to the physical page: [ 30.664466] page:000000004834c775 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a00a [ 30.665572] memcg:ffff888010141f01 [ 30.666016] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.666698] page_type: 0xffffffff() [ 30.667162] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.668086] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010141f01 [ 30.669008] page dumped because: kasan: bad access detected [ 30.669675] [ 30.669894] Memory state around the buggy address: [ 30.670492] ffff88801a00a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.671354] ffff88801a00a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.672212] >ffff88801a00a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.673085] ^ [ 30.673937] ffff88801a00a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.674824] ffff88801a00a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.675698] ================================================================== [ 30.676721] Disabling lock debugging due to kernel taint [ 32.556021] BUG: Bad rss-counter state mm:00000000a7cefb4f type:MM_FILEPAGES val:33 [ 32.557274] BUG: Bad rss-counter state mm:00000000a7cefb4f type:MM_ANONPAGES val:22 [ 32.997664] BUG: Bad rss-counter state mm:0000000043a55209 type:MM_FILEPAGES val:33 [ 32.998884] BUG: Bad rss-counter state mm:0000000043a55209 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25403' (ECDSA) to the list of known hosts. 2023/06/20 15:42:57 fuzzer started 2023/06/20 15:42:58 dialing manager at localhost:36067 2023/06/20 15:42:58 checking machine... 2023/06/20 15:42:58 checking revisions... [ 33.635377] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:42:58 testing simple program... [ 33.680697] cgroup: Unknown subsys name 'net' [ 33.711232] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:42:57 Registers: info registers vcpu 0 RAX=ffff8880167e8000 RBX=ffff8880167e73f0 RCX=0000000000000001 RDX=1ffff11002cfce80 RSI=ffff8880167e79b8 RDI=ffff8880167e7400 RBP=ffff8880167e79b8 RSP=ffff8880167e7348 R8 =ffffffff863dde82 R9 =ffff8880167e7430 R10=0000000000038001 R11=0000000000091ae9 R12=0000000000000008 R13=ffff8880167e0000 R14=ffff8880167e79c0 R15=ffff8880167e73f0 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 00007fc70617e900 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=00007fc706735618 CR3=000000000ee7a000 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=0000000000000001 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=00007f8d40bbb940 CR3=000000000d67e000 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=445e0bc3f8c50ba69441241f5694e3f0 XMM02=000000000011a400ec2efd57dc4c00df XMM03=0000000000121cc8fe8aac2e5a058e68 XMM04=bea1fa6f79ae896900000000000ae988 XMM05=dfcdbad4f1609c370000000000131b50 XMM06=af9ec7563fa8291d00000000001309b8 XMM07=e042d86d42eb936e0000000000121f48 XMM08=fe8aac2e5a058e68000000000011a460 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000