syzkaller login: [ 31.229211] BUG: Bad rss-counter state mm:000000003661bc56 type:MM_FILEPAGES val:33 [ 31.234003] BUG: Bad rss-counter state mm:000000003661bc56 type:MM_ANONPAGES val:22 [ 31.408129] ================================================================== [ 31.408774] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.409441] Read of size 8 at addr ffff88800c9006b0 by task sshd/221 [ 31.410450] [ 31.410610] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.411210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.411888] Call Trace: [ 31.412117] [ 31.412318] dump_stack_lvl+0x91/0xf0 [ 31.412667] print_report+0xcc/0x620 [ 31.413012] ? __virt_addr_valid+0x102/0x340 [ 31.413414] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.415323] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.415761] kasan_report+0xbe/0xf0 [ 31.416157] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.416594] vma_interval_tree_remove+0xc75/0xec0 [ 31.417121] vma_prepare+0xc54/0x11a0 [ 31.417469] __split_vma+0x5af/0x950 [ 31.417821] ? __pfx___split_vma+0x10/0x10 [ 31.418244] ? find_held_lock+0x2c/0x110 [ 31.418617] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.419109] ? lock_is_held_type+0x9f/0x120 [ 31.419554] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.420097] ? mtree_range_walk+0x632/0x900 [ 31.420540] ? mas_walk+0x5c7/0x7c0 [ 31.420905] do_vmi_munmap+0x1f1/0x2b0 [ 31.421351] mmap_region+0x1f9/0x2660 [ 31.421748] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.422254] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.422796] ? __pfx_lock_acquire+0x10/0x10 [ 31.423262] ? __pfx_mmap_region+0x10/0x10 [ 31.423669] ? security_mmap_addr+0x7d/0xa0 [ 31.424138] ? get_unmapped_area+0x1f5/0x3f0 [ 31.424578] do_mmap+0x854/0xf00 [ 31.424920] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.425349] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.425789] ksys_mmap_pgoff+0x3af/0x500 [ 31.426237] do_syscall_64+0x3f/0x90 [ 31.426607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.427195] RIP: 0033:0x7ff973022d82 [ 31.427523] 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 [ 31.429171] RSP: 002b:00007ffcb29b4e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.429846] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff973022d82 [ 31.431638] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff97245c000 [ 31.433743] RBP: 00007ff97245c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.435749] R10: 0000000000000812 R11: 0000000000000206 R12: 000055692c6c1f70 [ 31.438237] R13: 00007ffcb29b4e80 R14: 00007ffcb29b4eb0 R15: 00007ffcb29b5210 [ 31.439506] [ 31.439722] [ 31.439878] Allocated by task 212: [ 31.440237] kasan_save_stack+0x22/0x50 [ 31.440605] kasan_set_track+0x25/0x30 [ 31.440963] __kasan_slab_alloc+0x59/0x70 [ 31.441397] kmem_cache_alloc+0x16b/0x370 [ 31.441783] vm_area_dup+0x20/0x160 [ 31.442224] __split_vma+0x170/0x950 [ 31.442595] split_vma+0xc6/0x110 [ 31.442912] mprotect_fixup+0x8d2/0xb30 [ 31.443352] do_mprotect_pkey+0x87e/0xd40 [ 31.443726] __x64_sys_mprotect+0x78/0xc0 [ 31.444156] do_syscall_64+0x3f/0x90 [ 31.444499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.444954] [ 31.445164] Freed by task 13: [ 31.445443] kasan_save_stack+0x22/0x50 [ 31.445825] kasan_set_track+0x25/0x30 [ 31.446226] kasan_save_free_info+0x2b/0x50 [ 31.446609] __kasan_slab_free+0x10a/0x190 [ 31.446993] kmem_cache_free+0x10d/0x4d0 [ 31.447455] rcu_core+0x8c8/0x2860 [ 31.447770] __do_softirq+0x1b7/0x7d4 [ 31.448168] [ 31.448335] Last potentially related work creation: [ 31.448755] kasan_save_stack+0x22/0x50 [ 31.449169] __kasan_record_aux_stack+0x8e/0xa0 [ 31.449598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.450134] remove_vma+0x139/0x170 [ 31.450460] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.450858] do_vmi_munmap+0x1f1/0x2b0 [ 31.451259] __vm_munmap+0x138/0x3a0 [ 31.451598] __x64_sys_munmap+0x59/0x80 [ 31.451958] do_syscall_64+0x3f/0x90 [ 31.452420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.452883] [ 31.453090] Second to last potentially related work creation: [ 31.453584] kasan_save_stack+0x22/0x50 [ 31.453952] __kasan_record_aux_stack+0x8e/0xa0 [ 31.454414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.454867] remove_vma+0x139/0x170 [ 31.455238] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.455636] do_vmi_munmap+0x1f1/0x2b0 [ 31.455984] mmap_region+0x1f9/0x2660 [ 31.456382] do_mmap+0x854/0xf00 [ 31.456694] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.457136] ksys_mmap_pgoff+0x3af/0x500 [ 31.457499] do_syscall_64+0x3f/0x90 [ 31.458695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.459277] [ 31.459475] The buggy address belongs to the object at ffff88800c900658 [ 31.459475] which belongs to the cache vm_area_struct of size 168 [ 31.460627] The buggy address is located 88 bytes inside of [ 31.460627] freed 168-byte region [ffff88800c900658, ffff88800c900700) [ 31.461690] [ 31.461857] The buggy address belongs to the physical page: [ 31.462350] page:00000000c045e1d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc900 [ 31.463350] memcg:ffff88800be5c901 [ 31.463681] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.464262] page_type: 0xffffffff() [ 31.464612] raw: 0100000000000200 ffff88800879fc80 ffffea0000571300 dead000000000003 [ 31.465395] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800be5c901 [ 31.466347] page dumped because: kasan: bad access detected [ 31.466842] [ 31.467119] Memory state around the buggy address: [ 31.467570] ffff88800c900580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.468268] ffff88800c900600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.468916] >ffff88800c900680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.469631] ^ [ 31.470286] ffff88800c900700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.470960] ffff88800c900780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.471717] ================================================================== [ 31.482808] Disabling lock debugging due to kernel taint [ 33.784154] BUG: Bad rss-counter state mm:0000000044fb937d type:MM_FILEPAGES val:33 [ 33.785796] BUG: Bad rss-counter state mm:0000000044fb937d type:MM_ANONPAGES val:22 [ 34.589752] BUG: Bad rss-counter state mm:00000000bd6d72a5 type:MM_FILEPAGES val:33 [ 34.590441] BUG: Bad rss-counter state mm:00000000bd6d72a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22891' (ECDSA) to the list of known hosts. 2023/06/20 08:16:03 fuzzer started 2023/06/20 08:16:03 dialing manager at localhost:44161 2023/06/20 08:16:03 checking machine... 2023/06/20 08:16:03 checking revisions... 2023/06/20 08:16:03 testing simple program... [ 35.250076] kmemleak: Automatic memory scanning thread ended [ 35.294609] cgroup: Unknown subsys name 'net' [ 35.368252] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:16:02 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff88800fe178f0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800879fdc0 R13=ffff88800dcb8400 R14=0000000000000000 R15=0000000000000cc0 RIP=ffffffff81534226 RFL=00000046 [---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 00007f789740f900 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=00007fa018e089f0 CR3=0000000019ff2000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002798d1d RBX=ffff888013cc68b8 RCX=1ffff11002746fb6 RDX=dffffc0000000000 RSI=ffff888019f0ed00 RDI=ffff888013cc68e8 RBP=ffff888013a37d80 RSP=ffff888018367380 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888019f0ec00 R13=0000000000000000 R14=ffff88800e353e88 R15=ffff88800e353e40 RIP=ffffffff818474fe RFL=00000046 [---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 00007fce5032f900 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=00007fce502f4008 CR3=000000000e82c000 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