syzkaller login: [ 32.137314] BUG: Bad rss-counter state mm:000000002b4963b7 type:MM_FILEPAGES val:33 [ 32.139102] BUG: Bad rss-counter state mm:000000002b4963b7 type:MM_ANONPAGES val:22 [ 32.302659] ================================================================== [ 32.303581] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.304544] Read of size 8 at addr ffff888016c95c20 by task sshd/220 [ 32.305326] [ 32.305545] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.306597] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.307588] Call Trace: [ 32.307910] [ 32.308204] dump_stack_lvl+0x91/0xf0 [ 32.308741] print_report+0xcc/0x620 [ 32.309231] ? __virt_addr_valid+0x102/0x340 [ 32.309785] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.310414] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.311029] kasan_report+0xbe/0xf0 [ 32.311518] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.312143] vma_interval_tree_remove+0xc75/0xec0 [ 32.312760] vma_prepare+0xc54/0x11a0 [ 32.313237] __split_vma+0x5af/0x950 [ 32.313710] ? __pfx___split_vma+0x10/0x10 [ 32.314244] ? find_held_lock+0x2c/0x110 [ 32.314771] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.315349] ? lock_is_held_type+0x9f/0x120 [ 32.315885] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.316524] ? mtree_range_walk+0x632/0x900 [ 32.317096] ? mas_walk+0x5c7/0x7c0 [ 32.317579] do_vmi_munmap+0x1f1/0x2b0 [ 32.318080] mmap_region+0x1f9/0x2660 [ 32.318563] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.319080] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.319794] ? __pfx_lock_acquire+0x10/0x10 [ 32.320326] ? __pfx_mmap_region+0x10/0x10 [ 32.320868] ? security_mmap_addr+0x7d/0xa0 [ 32.321405] ? get_unmapped_area+0x1f5/0x3f0 [ 32.321957] do_mmap+0x854/0xf00 [ 32.322411] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.322904] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.323486] ksys_mmap_pgoff+0x3af/0x500 [ 32.324002] do_syscall_64+0x3f/0x90 [ 32.324492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.325172] RIP: 0033:0x7fd47949dd82 [ 32.325637] 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 [ 32.327757] RSP: 002b:00007ffe3a080ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.328688] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd47949dd82 [ 32.329546] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4788d7000 [ 32.330394] RBP: 00007fd4788d7000 R08: 0000000000000009 R09: 0000000000001000 [ 32.331245] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561a1109ec0 [ 32.332092] R13: 00007ffe3a080f10 R14: 00007ffe3a080f40 R15: 00007ffe3a0812a0 [ 32.332966] [ 32.333269] [ 32.333482] Allocated by task 213: [ 32.333918] kasan_save_stack+0x22/0x50 [ 32.334432] kasan_set_track+0x25/0x30 [ 32.334934] __kasan_slab_alloc+0x59/0x70 [ 32.335469] kmem_cache_alloc+0x16b/0x370 [ 32.335985] vm_area_dup+0x20/0x160 [ 32.336447] __split_vma+0x170/0x950 [ 32.336937] split_vma+0xc6/0x110 [ 32.337380] mprotect_fixup+0x8d2/0xb30 [ 32.337891] do_mprotect_pkey+0x87e/0xd40 [ 32.338420] __x64_sys_mprotect+0x78/0xc0 [ 32.338941] do_syscall_64+0x3f/0x90 [ 32.339433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.340074] [ 32.340293] Freed by task 203: [ 32.340692] kasan_save_stack+0x22/0x50 [ 32.341202] kasan_set_track+0x25/0x30 [ 32.341701] kasan_save_free_info+0x2b/0x50 [ 32.342240] __kasan_slab_free+0x10a/0x190 [ 32.342771] kmem_cache_free+0x10d/0x4d0 [ 32.343282] rcu_core+0x8c8/0x2860 [ 32.343730] __do_softirq+0x1b7/0x7d4 [ 32.344210] [ 32.344424] Last potentially related work creation: [ 32.345039] kasan_save_stack+0x22/0x50 [ 32.345550] __kasan_record_aux_stack+0x8e/0xa0 [ 32.346124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.346777] remove_vma+0x139/0x170 [ 32.347232] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.347869] do_vmi_munmap+0x1f1/0x2b0 [ 32.348360] __vm_munmap+0x138/0x3a0 [ 32.348845] __x64_sys_munmap+0x59/0x80 [ 32.349348] do_syscall_64+0x3f/0x90 [ 32.349829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.350467] [ 32.350680] The buggy address belongs to the object at ffff888016c95bc8 [ 32.350680] which belongs to the cache vm_area_struct of size 168 [ 32.352156] The buggy address is located 88 bytes inside of [ 32.352156] freed 168-byte region [ffff888016c95bc8, ffff888016c95c70) [ 32.353587] [ 32.353801] The buggy address belongs to the physical page: [ 32.354456] page:00000000655c05f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c95 [ 32.355554] memcg:ffff88800f629c01 [ 32.355983] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.356647] page_type: 0xffffffff() [ 32.357096] raw: 0100000000000200 ffff88800879fc80 ffffea000039cb80 dead000000000006 [ 32.358020] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f629c01 [ 32.358924] page dumped because: kasan: bad access detected [ 32.359581] [ 32.359803] Memory state around the buggy address: [ 32.360384] ffff888016c95b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.361250] ffff888016c95b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.362107] >ffff888016c95c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.362959] ^ [ 32.363489] ffff888016c95c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.364363] ffff888016c95d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.365216] ================================================================== [ 32.366122] Disabling lock debugging due to kernel taint [ 34.273274] BUG: Bad rss-counter state mm:0000000076592333 type:MM_FILEPAGES val:33 [ 34.274495] BUG: Bad rss-counter state mm:0000000076592333 type:MM_ANONPAGES val:22 [ 34.874608] BUG: Bad rss-counter state mm:000000009c52a4b5 type:MM_FILEPAGES val:33 [ 34.875795] BUG: Bad rss-counter state mm:000000009c52a4b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64139' (ECDSA) to the list of known hosts. 2023/06/19 18:26:08 fuzzer started 2023/06/19 18:26:08 dialing manager at localhost:44161 2023/06/19 18:26:08 checking machine... 2023/06/19 18:26:08 checking revisions... [ 35.531435] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:26:08 testing simple program... [ 35.589985] cgroup: Unknown subsys name 'net' [ 35.655591] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:26:06 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff85dfca24 RCX=ffffffff8180c584 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfca20 RSP=ffff88806ce099e0 R8 =ffffffff86137508 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca28 R13=ffffffff85dfc9fc R14=ffffffff85dfca1c R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 0000000000000000 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=00007febf8601338 CR3=000000000d822000 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=2037303a36323a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a36323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000002 RCX=ffffffff818a293b RDX=0000000000000002 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880102efc48 RSP=ffff8880102ef9d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=3830306234386136 R12=ffff888019b88d38 R13=0000000000000002 R14=ffff88800dd94628 R15=ffff8880102efc58 RIP=ffffffff814c01d0 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 00007fb1709b0900 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=00007fe0bf984650 CR3=000000000c710000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=869daeb0e666743100000000000ae988 XMM05=4c8f0745c6e58c3d0000000000134c28 XMM06=c291bd5c70af25b90000000000133a18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000