syzkaller login: [ 28.688597] BUG: Bad rss-counter state mm:0000000097008b9f type:MM_FILEPAGES val:33 [ 28.689682] BUG: Bad rss-counter state mm:0000000097008b9f type:MM_ANONPAGES val:22 [ 28.856752] ================================================================== [ 28.857689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.859000] Read of size 8 at addr ffff88800dfaeed8 by task sshd/220 [ 28.859920] [ 28.860195] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.861148] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.862088] Call Trace: [ 28.862405] <TASK> [ 28.862701] dump_stack_lvl+0x91/0xf0 [ 28.863181] print_report+0xcc/0x620 [ 28.863656] ? __virt_addr_valid+0x102/0x340 [ 28.864205] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.864809] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.865411] kasan_report+0xbe/0xf0 [ 28.865880] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.866484] vma_interval_tree_remove+0xc75/0xec0 [ 28.867095] vma_prepare+0xc54/0x11a0 [ 28.867563] __split_vma+0x5af/0x950 [ 28.868023] ? __pfx___split_vma+0x10/0x10 [ 28.868540] ? find_held_lock+0x2c/0x110 [ 28.869050] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.869615] ? lock_is_held_type+0x9f/0x120 [ 28.870162] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.870950] ? mtree_range_walk+0x632/0x900 [ 28.871664] ? mas_walk+0x5c7/0x7c0 [ 28.872257] do_vmi_munmap+0x1f1/0x2b0 [ 28.872877] mmap_region+0x1f9/0x2660 [ 28.873474] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.874114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.874995] ? __pfx_lock_acquire+0x10/0x10 [ 28.875617] ? __pfx_mmap_region+0x10/0x10 [ 28.876228] ? security_mmap_addr+0x7d/0xa0 [ 28.876846] ? get_unmapped_area+0x1f5/0x3f0 [ 28.877513] do_mmap+0x854/0xf00 [ 28.878047] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.878659] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.879333] ksys_mmap_pgoff+0x3af/0x500 [ 28.879939] do_syscall_64+0x3f/0x90 [ 28.880536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.881340] RIP: 0033:0x7f4baed3cd82 [ 28.881916] 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 [ 28.884402] RSP: 002b:00007ffd86dd2448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.885482] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4baed3cd82 [ 28.886485] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4bae176000 [ 28.887510] RBP: 00007f4bae176000 R08: 0000000000000009 R09: 0000000000001000 [ 28.888368] R10: 0000000000000812 R11: 0000000000000206 R12: 00005613fe0a6980 [ 28.889200] R13: 00007ffd86dd2460 R14: 00007ffd86dd2490 R15: 00007ffd86dd27f0 [ 28.890045] </TASK> [ 28.890336] [ 28.890551] Allocated by task 212: [ 28.890980] kasan_save_stack+0x22/0x50 [ 28.891485] kasan_set_track+0x25/0x30 [ 28.891975] __kasan_slab_alloc+0x59/0x70 [ 28.892491] kmem_cache_alloc+0x16b/0x370 [ 28.893003] vm_area_dup+0x20/0x160 [ 28.893454] __split_vma+0x170/0x950 [ 28.893917] split_vma+0xc6/0x110 [ 28.894349] mprotect_fixup+0x8d2/0xb30 [ 28.894854] do_mprotect_pkey+0x87e/0xd40 [ 28.895371] __x64_sys_mprotect+0x78/0xc0 [ 28.895887] do_syscall_64+0x3f/0x90 [ 28.896360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.897000] [ 28.897217] Freed by task 212: [ 28.897604] kasan_save_stack+0x22/0x50 [ 28.898101] kasan_set_track+0x25/0x30 [ 28.898611] kasan_save_free_info+0x2b/0x50 [ 28.899196] __kasan_slab_free+0x10a/0x190 [ 28.899721] kmem_cache_free+0x10d/0x4d0 [ 28.900228] rcu_core+0x8c8/0x2860 [ 28.900665] __do_softirq+0x1b7/0x7d4 [ 28.901139] [ 28.901349] Last potentially related work creation: [ 28.901929] kasan_save_stack+0x22/0x50 [ 28.902431] __kasan_record_aux_stack+0x8e/0xa0 [ 28.903013] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.903645] remove_vma+0x139/0x170 [ 28.904099] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.904653] do_vmi_munmap+0x1f1/0x2b0 [ 28.905133] __vm_munmap+0x138/0x3a0 [ 28.905593] __x64_sys_munmap+0x59/0x80 [ 28.906091] do_syscall_64+0x3f/0x90 [ 28.906565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.907225] [ 28.907440] Second to last potentially related work creation: [ 28.908113] kasan_save_stack+0x22/0x50 [ 28.908615] __kasan_record_aux_stack+0x8e/0xa0 [ 28.909178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.909813] remove_vma+0x139/0x170 [ 28.910262] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.910822] do_vmi_munmap+0x1f1/0x2b0 [ 28.911308] mmap_region+0x1f9/0x2660 [ 28.911781] do_mmap+0x854/0xf00 [ 28.912206] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.912687] ksys_mmap_pgoff+0x7d/0x500 [ 28.913172] do_syscall_64+0x3f/0x90 [ 28.913647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.914282] [ 28.914497] The buggy address belongs to the object at ffff88800dfaee80 [ 28.914497] which belongs to the cache vm_area_struct of size 168 [ 28.915951] The buggy address is located 88 bytes inside of [ 28.915951] freed 168-byte region [ffff88800dfaee80, ffff88800dfaef28) [ 28.917341] [ 28.917557] The buggy address belongs to the physical page: [ 28.918206] page:0000000083859b44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfae [ 28.919285] memcg:ffff88800eb1ac01 [ 28.919708] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.920397] page_type: 0xffffffff() [ 28.920840] raw: 0100000000000200 ffff8880087a0c80 ffffea000039c480 dead000000000003 [ 28.921744] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb1ac01 [ 28.922645] page dumped because: kasan: bad access detected [ 28.923308] [ 28.923523] Memory state around the buggy address: [ 28.924094] ffff88800dfaed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.924949] ffff88800dfaee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 28.925797] >ffff88800dfaee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.926658] ^ [ 28.927373] ffff88800dfaef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 28.928217] ffff88800dfaef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.929061] ================================================================== [ 28.930111] Disabling lock debugging due to kernel taint [ 30.759861] BUG: Bad rss-counter state mm:00000000cc290370 type:MM_FILEPAGES val:33 [ 30.761078] BUG: Bad rss-counter state mm:00000000cc290370 type:MM_ANONPAGES val:22 [ 31.240592] BUG: Bad rss-counter state mm:00000000c70b34cc type:MM_FILEPAGES val:33 [ 31.241727] BUG: Bad rss-counter state mm:00000000c70b34cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20333' (ECDSA) to the list of known hosts. 2023/06/20 16:03:34 fuzzer started 2023/06/20 16:03:35 dialing manager at localhost:36067 2023/06/20 16:03:35 checking machine... 2023/06/20 16:03:35 checking revisions... [ 31.993735] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:03:35 testing simple program... [ 32.049547] cgroup: Unknown subsys name 'net' [ 32.109224] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:03:34 Registers: info registers vcpu 0 RAX=1ffffffff0c765c9 RBX=0000000000000001 RCX=ffffffff863b2e46 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff863b2e48 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff863b2e4a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a835 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800e397b50 R15=ffff88806ce09a98 RIP=ffffffff811311c7 RFL=00000216 [----AP-] 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 00007fdb8a87e900 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=00007fdb8ae35618 CR3=000000000e51c000 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=dffffc0000000000 RBX=ffff88806cf09a98 RCX=ffffffff860b9cfe RDX=1ffff1100d9e1353 RSI=ffff888008e07f38 RDI=ffff88806cf09a98 RBP=ffff888008e07f38 RSP=ffff88806cf099f0 R8 =ffffffff860b9d02 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000baa4 R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff888008e07f40 R15=ffff88806cf09a98 RIP=ffffffff81130416 RFL=00000286 [--S--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 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=00007f5a69002070 CR3=000000000c892000 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=f3cd904dc46a34ba8b43e231fa728a53 XMM02=000000000011a270eff9b2d0a8fce9cb XMM03=000000000011a3402c67c8bc2e329bc3 XMM04=23da238f4f48d29300000000000ae988 XMM05=19e9129bd510f2350000000000132980 XMM06=56714766e308c18e00000000001317e8 XMM07=e042d86d42eb936e0000000000121278 XMM08=6356677aa9a73c59000000000011a340 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000