syzkaller login: [ 30.688545] sshd (212) used greatest stack depth: 24128 bytes left [ 30.690021] BUG: Bad rss-counter state mm:0000000008bbc67d type:MM_FILEPAGES val:33 [ 30.691982] BUG: Bad rss-counter state mm:0000000008bbc67d type:MM_ANONPAGES val:22 [ 30.861706] ================================================================== [ 30.862732] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.863850] Read of size 8 at addr ffff88800fdc7ed8 by task sshd/219 [ 30.864707] [ 30.864942] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.865874] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.866923] Call Trace: [ 30.867272] [ 30.867582] dump_stack_lvl+0x91/0xf0 [ 30.868133] print_report+0xcc/0x620 [ 30.868672] ? __virt_addr_valid+0x102/0x340 [ 30.869268] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.869939] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.870619] kasan_report+0xbe/0xf0 [ 30.871158] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.871850] vma_interval_tree_remove+0xc75/0xec0 [ 30.872529] vma_prepare+0xc54/0x11a0 [ 30.873065] __split_vma+0x5af/0x950 [ 30.873588] ? __pfx___split_vma+0x10/0x10 [ 30.874179] ? find_held_lock+0x2c/0x110 [ 30.874761] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.875393] ? lock_is_held_type+0x9f/0x120 [ 30.875998] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.876688] ? mtree_range_walk+0x632/0x900 [ 30.877307] ? mas_walk+0x5c7/0x7c0 [ 30.877840] do_vmi_munmap+0x1f1/0x2b0 [ 30.878390] mmap_region+0x1f9/0x2660 [ 30.878928] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.879502] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.880307] ? __pfx_lock_acquire+0x10/0x10 [ 30.880899] ? __pfx_mmap_region+0x10/0x10 [ 30.881496] ? security_mmap_addr+0x7d/0xa0 [ 30.882112] ? get_unmapped_area+0x1f5/0x3f0 [ 30.882740] do_mmap+0x854/0xf00 [ 30.883241] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.883806] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.884454] ksys_mmap_pgoff+0x3af/0x500 [ 30.885041] do_syscall_64+0x3f/0x90 [ 30.885592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.886340] RIP: 0033:0x7fa464dbcd82 [ 30.886865] 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 [ 30.889347] RSP: 002b:00007ffdc5934ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.890379] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa464dbcd82 [ 30.891365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4641f6000 [ 30.892357] RBP: 00007fa4641f6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.893334] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596465c2ec0 [ 30.894315] R13: 00007ffdc5934bc0 R14: 00007ffdc5934bf0 R15: 00007ffdc5934f50 [ 30.895304] [ 30.895641] [ 30.895891] Allocated by task 212: [ 30.896392] kasan_save_stack+0x22/0x50 [ 30.896973] kasan_set_track+0x25/0x30 [ 30.897540] __kasan_slab_alloc+0x59/0x70 [ 30.898145] kmem_cache_alloc+0x16b/0x370 [ 30.898741] vm_area_dup+0x20/0x160 [ 30.899264] __split_vma+0x170/0x950 [ 30.899803] split_vma+0xc6/0x110 [ 30.900328] mprotect_fixup+0x8d2/0xb30 [ 30.900906] do_mprotect_pkey+0x87e/0xd40 [ 30.901503] __x64_sys_mprotect+0x78/0xc0 [ 30.902102] do_syscall_64+0x3f/0x90 [ 30.902656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.903397] [ 30.903649] Freed by task 212: [ 30.904094] kasan_save_stack+0x22/0x50 [ 30.904780] kasan_set_track+0x25/0x30 [ 30.905339] kasan_save_free_info+0x2b/0x50 [ 30.905947] __kasan_slab_free+0x10a/0x190 [ 30.906552] kmem_cache_free+0x10d/0x4d0 [ 30.907129] rcu_core+0x8c8/0x2860 [ 30.907633] __do_softirq+0x1b7/0x7d4 [ 30.908296] [ 30.908574] Last potentially related work creation: [ 30.909324] kasan_save_stack+0x22/0x50 [ 30.909974] __kasan_record_aux_stack+0x8e/0xa0 [ 30.910670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.911490] remove_vma+0x139/0x170 [ 30.912096] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.912830] do_vmi_munmap+0x1f1/0x2b0 [ 30.913447] __vm_munmap+0x138/0x3a0 [ 30.914033] __x64_sys_munmap+0x59/0x80 [ 30.914646] do_syscall_64+0x3f/0x90 [ 30.915258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.916082] [ 30.916368] The buggy address belongs to the object at ffff88800fdc7e80 [ 30.916368] which belongs to the cache vm_area_struct of size 168 [ 30.918219] The buggy address is located 88 bytes inside of [ 30.918219] freed 168-byte region [ffff88800fdc7e80, ffff88800fdc7f28) [ 30.920000] [ 30.920296] The buggy address belongs to the physical page: [ 30.921139] page:0000000003abcd36 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdc7 [ 30.922503] memcg:ffff888019fefe01 [ 30.923045] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.923842] page_type: 0xffffffff() [ 30.924460] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.925425] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fefe01 [ 30.926342] page dumped because: kasan: bad access detected [ 30.927026] [ 30.927243] Memory state around the buggy address: [ 30.927821] ffff88800fdc7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.928709] ffff88800fdc7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.929584] >ffff88800fdc7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.930447] ^ [ 30.931205] ffff88800fdc7f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.932087] ffff88800fdc7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.932976] ================================================================== [ 30.933917] Disabling lock debugging due to kernel taint [ 32.819121] BUG: Bad rss-counter state mm:00000000905bd650 type:MM_FILEPAGES val:33 [ 32.820134] BUG: Bad rss-counter state mm:00000000905bd650 type:MM_ANONPAGES val:22 [ 33.314451] BUG: Bad rss-counter state mm:000000004648399d type:MM_FILEPAGES val:33 [ 33.315481] BUG: Bad rss-counter state mm:000000004648399d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8959' (ECDSA) to the list of known hosts. 2023/06/21 07:16:38 fuzzer started 2023/06/21 07:16:38 dialing manager at localhost:36067 2023/06/21 07:16:38 checking machine... 2023/06/21 07:16:38 checking revisions... [ 34.037383] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:16:38 testing simple program... [ 34.088536] cgroup: Unknown subsys name 'net' [ 34.127606] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:16:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016a47648 RCX=ffff888016a47620 RDX=1ffff11002d48ebb RSI=ffffffff813ad720 RDI=ffff888016a47658 RBP=ffff888016a47618 RSP=ffff888016a47568 R8 =0000000000000001 R9 =ffff888016a475c0 R10=0000000000038001 R11=0000000000003c0d R12=ffff888016a47648 R13=0000000000000000 R14=ffff888016851b40 R15=00000000000000a4 RIP=ffffffff813ad487 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 00007fe0e83ae900 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=00007fe0e8965618 CR3=000000000ebcc000 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=00007f4debba7bc8 CR3=000000000d7a8000 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=ea9d7540f2575cbf6a4a5132dd3ecc5f XMM02=000000000011b398eff9b2d0a8fce9cb XMM03=000000000011b4682c67c8bc2e329bc3 XMM04=f42ec9fb24cecc0000000000000ae988 XMM05=c84c3624772242130000000000132ef0 XMM06=806171799158d9670000000000131f90 XMM07=e042d86d42eb936e0000000000122390 XMM08=4a539a15cfd2abf3000000000011b468 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000