syzkaller login: [ 31.113280] BUG: Bad rss-counter state mm:0000000062635cd1 type:MM_FILEPAGES val:33 [ 31.114912] BUG: Bad rss-counter state mm:0000000062635cd1 type:MM_ANONPAGES val:22 [ 31.269512] ================================================================== [ 31.270653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.272079] Read of size 8 at addr ffff88800dbcbb38 by task sshd/222 [ 31.272836] [ 31.273056] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.273911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.274864] Call Trace: [ 31.275181] [ 31.275468] dump_stack_lvl+0x91/0xf0 [ 31.275968] print_report+0xcc/0x620 [ 31.276456] ? __virt_addr_valid+0x102/0x340 [ 31.276996] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277605] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278221] kasan_report+0xbe/0xf0 [ 31.278700] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279322] vma_interval_tree_remove+0xc75/0xec0 [ 31.279934] vma_prepare+0xc54/0x11a0 [ 31.280447] __split_vma+0x5af/0x950 [ 31.280958] ? __pfx___split_vma+0x10/0x10 [ 31.281607] ? find_held_lock+0x2c/0x110 [ 31.282240] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.282928] ? lock_is_held_type+0x9f/0x120 [ 31.283589] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.284366] ? mtree_range_walk+0x632/0x900 [ 31.285045] ? mas_walk+0x5c7/0x7c0 [ 31.285621] do_vmi_munmap+0x1f1/0x2b0 [ 31.286227] mmap_region+0x1f9/0x2660 [ 31.286813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.287438] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.288312] ? __pfx_lock_acquire+0x10/0x10 [ 31.288961] ? __pfx_mmap_region+0x10/0x10 [ 31.289604] ? security_mmap_addr+0x7d/0xa0 [ 31.290243] ? get_unmapped_area+0x1f5/0x3f0 [ 31.290845] do_mmap+0x854/0xf00 [ 31.291323] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.291886] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.292497] ksys_mmap_pgoff+0x3af/0x500 [ 31.293055] do_syscall_64+0x3f/0x90 [ 31.293577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.294273] RIP: 0033:0x7fd78efc0d82 [ 31.294767] 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 [ 31.297090] RSP: 002b:00007fffd4a025b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.298066] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd78efc0d82 [ 31.298991] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd78e3fa000 [ 31.299918] RBP: 00007fd78e3fa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.300839] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ecc901ec0 [ 31.301758] R13: 00007fffd4a025d0 R14: 00007fffd4a02600 R15: 00007fffd4a02960 [ 31.302694] [ 31.303003] [ 31.303237] Allocated by task 215: [ 31.303709] kasan_save_stack+0x22/0x50 [ 31.304259] kasan_set_track+0x25/0x30 [ 31.304795] __kasan_slab_alloc+0x59/0x70 [ 31.305365] kmem_cache_alloc+0x16b/0x370 [ 31.305926] vm_area_dup+0x20/0x160 [ 31.306420] __split_vma+0x170/0x950 [ 31.306928] split_vma+0xc6/0x110 [ 31.307400] mprotect_fixup+0x8d2/0xb30 [ 31.307976] do_mprotect_pkey+0x87e/0xd40 [ 31.308542] __x64_sys_mprotect+0x78/0xc0 [ 31.309112] do_syscall_64+0x3f/0x90 [ 31.309628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.310325] [ 31.310566] Freed by task 215: [ 31.310989] kasan_save_stack+0x22/0x50 [ 31.311543] kasan_set_track+0x25/0x30 [ 31.312079] kasan_save_free_info+0x2b/0x50 [ 31.312665] __kasan_slab_free+0x10a/0x190 [ 31.313249] kmem_cache_free+0x10d/0x4d0 [ 31.313914] rcu_core+0x8c8/0x2860 [ 31.314482] __do_softirq+0x1b7/0x7d4 [ 31.315092] [ 31.315372] Last potentially related work creation: [ 31.316123] kasan_save_stack+0x22/0x50 [ 31.316751] __kasan_record_aux_stack+0x8e/0xa0 [ 31.317471] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.318276] remove_vma+0x139/0x170 [ 31.318844] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.319543] do_vmi_munmap+0x1f1/0x2b0 [ 31.320170] __vm_munmap+0x138/0x3a0 [ 31.320751] __x64_sys_munmap+0x59/0x80 [ 31.321379] do_syscall_64+0x3f/0x90 [ 31.321974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.322788] [ 31.323059] Second to last potentially related work creation: [ 31.323947] kasan_save_stack+0x22/0x50 [ 31.324311] __kasan_record_aux_stack+0x8e/0xa0 [ 31.324633] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.324996] remove_vma+0x139/0x170 [ 31.325251] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.325567] do_vmi_munmap+0x1f1/0x2b0 [ 31.325839] move_vma.constprop.0+0x88a/0x1ba0 [ 31.326172] __do_sys_mremap+0xb78/0x1780 [ 31.326467] do_syscall_64+0x3f/0x90 [ 31.326736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.327100] [ 31.327222] The buggy address belongs to the object at ffff88800dbcbae0 [ 31.327222] which belongs to the cache vm_area_struct of size 168 [ 31.328056] The buggy address is located 88 bytes inside of [ 31.328056] freed 168-byte region [ffff88800dbcbae0, ffff88800dbcbb88) [ 31.328835] [ 31.328961] The buggy address belongs to the physical page: [ 31.329332] page:000000007dfeb9ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbcb [ 31.329934] memcg:ffff888009519d01 [ 31.330173] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.330534] page_type: 0xffffffff() [ 31.330790] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.331306] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009519d01 [ 31.331831] page dumped because: kasan: bad access detected [ 31.332202] [ 31.332323] Memory state around the buggy address: [ 31.332652] ffff88800dbcba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.333134] ffff88800dbcba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.333610] >ffff88800dbcbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.334085] ^ [ 31.334426] ffff88800dbcbb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.334906] ffff88800dbcbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.335382] ================================================================== [ 31.335935] Disabling lock debugging due to kernel taint [ 33.353675] BUG: Bad rss-counter state mm:00000000556f5427 type:MM_FILEPAGES val:33 [ 33.355276] BUG: Bad rss-counter state mm:00000000556f5427 type:MM_ANONPAGES val:22 [ 33.950524] BUG: Bad rss-counter state mm:0000000008589e82 type:MM_FILEPAGES val:33 [ 33.951847] BUG: Bad rss-counter state mm:0000000008589e82 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22635' (ECDSA) to the list of known hosts. 2023/06/21 03:49:05 fuzzer started 2023/06/21 03:49:05 dialing manager at localhost:36067 2023/06/21 03:49:05 checking machine... 2023/06/21 03:49:05 checking revisions... [ 34.674247] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:49:05 testing simple program... [ 34.725329] cgroup: Unknown subsys name 'net' [ 34.798207] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:49:05 Registers: info registers vcpu 0 RAX=0000000004320182 RBX=ffff888013993ec0 RCX=ffff88806cb786b0 RDX=0000000000000000 RSI=ffffffff846000aa RDI=ffffffff813710d2 RBP=0000000000000200 RSP=ffff888006b574c0 R8 =00000000c667001f R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffffea000032d380 R14=ffffffff81803033 R15=0000000080120011 RIP=ffffffff845119a4 RFL=00000006 [-----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 00007faefa278900 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=00007faef96650c0 CR3=000000000d734000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=4c2da14623839dca00000000000ae988 XMM05=38a7cc3ba9eaf6d80000000000133670 XMM06=59d5b690e0af863b0000000000132508 XMM07=fb795ef6d65770560000000000121660 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813782f8 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffffffff813782f8 RDI=ffff88806cf09b38 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff8880164fd1c0 R15=ffff88801592ab80 RIP=ffffffff84538440 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 00007fe993030900 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=00007fe992ffa008 CR3=000000000da88000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000