syzkaller login: [ 30.580365] BUG: Bad rss-counter state mm:00000000703ae8eb type:MM_FILEPAGES val:33 [ 30.581935] BUG: Bad rss-counter state mm:00000000703ae8eb type:MM_ANONPAGES val:22 [ 30.774472] ================================================================== [ 30.775417] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.776410] Read of size 8 at addr ffff88800dcdc310 by task sshd/220 [ 30.777243] [ 30.777605] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.778522] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.779547] Call Trace: [ 30.779899] [ 30.780190] dump_stack_lvl+0x91/0xf0 [ 30.780719] print_report+0xcc/0x620 [ 30.781242] ? __virt_addr_valid+0x102/0x340 [ 30.781852] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782523] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783168] kasan_report+0xbe/0xf0 [ 30.783684] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784329] vma_interval_tree_remove+0xc75/0xec0 [ 30.784994] vma_prepare+0xc54/0x11a0 [ 30.785524] __split_vma+0x5af/0x950 [ 30.786019] ? __pfx___split_vma+0x10/0x10 [ 30.786584] ? find_held_lock+0x2c/0x110 [ 30.787124] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.787723] ? lock_is_held_type+0x9f/0x120 [ 30.788283] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.788972] ? mtree_range_walk+0x632/0x900 [ 30.789594] ? mas_walk+0x5c7/0x7c0 [ 30.790090] do_vmi_munmap+0x1f1/0x2b0 [ 30.790628] mmap_region+0x1f9/0x2660 [ 30.791132] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.791776] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.792802] ? __pfx_lock_acquire+0x10/0x10 [ 30.793571] ? __pfx_mmap_region+0x10/0x10 [ 30.794322] ? security_mmap_addr+0x7d/0xa0 [ 30.795080] ? get_unmapped_area+0x1f5/0x3f0 [ 30.795798] do_mmap+0x854/0xf00 [ 30.796257] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.796800] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.797436] ksys_mmap_pgoff+0x3af/0x500 [ 30.797967] do_syscall_64+0x3f/0x90 [ 30.798488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.799167] RIP: 0033:0x7f9eb0efad82 [ 30.799663] 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 [ 30.801983] RSP: 002b:00007ffc7a406498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.802943] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9eb0efad82 [ 30.803841] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9eb0334000 [ 30.804753] RBP: 00007f9eb0334000 R08: 0000000000000009 R09: 0000000000001000 [ 30.805679] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb38c34ec0 [ 30.806574] R13: 00007ffc7a4064b0 R14: 00007ffc7a4064e0 R15: 00007ffc7a406840 [ 30.807479] [ 30.807780] [ 30.808010] Allocated by task 213: [ 30.808471] kasan_save_stack+0x22/0x50 [ 30.809038] kasan_set_track+0x25/0x30 [ 30.809587] __kasan_slab_alloc+0x59/0x70 [ 30.810132] kmem_cache_alloc+0x16b/0x370 [ 30.810678] vm_area_dup+0x20/0x160 [ 30.811152] __split_vma+0x170/0x950 [ 30.811646] split_vma+0xc6/0x110 [ 30.812103] mprotect_fixup+0x8d2/0xb30 [ 30.812642] do_mprotect_pkey+0x87e/0xd40 [ 30.813200] __x64_sys_mprotect+0x78/0xc0 [ 30.813775] do_syscall_64+0x3f/0x90 [ 30.814273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.814974] [ 30.815195] Freed by task 213: [ 30.815613] kasan_save_stack+0x22/0x50 [ 30.816141] kasan_set_track+0x25/0x30 [ 30.816677] kasan_save_free_info+0x2b/0x50 [ 30.817259] __kasan_slab_free+0x10a/0x190 [ 30.817854] kmem_cache_free+0x10d/0x4d0 [ 30.818403] rcu_core+0x8c8/0x2860 [ 30.818871] __do_softirq+0x1b7/0x7d4 [ 30.819385] [ 30.819607] Last potentially related work creation: [ 30.820216] kasan_save_stack+0x22/0x50 [ 30.820763] __kasan_record_aux_stack+0x8e/0xa0 [ 30.821393] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.822082] remove_vma+0x139/0x170 [ 30.822570] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.823144] do_vmi_munmap+0x1f1/0x2b0 [ 30.823665] __vm_munmap+0x138/0x3a0 [ 30.824153] __x64_sys_munmap+0x59/0x80 [ 30.824696] do_syscall_64+0x3f/0x90 [ 30.825220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.825920] [ 30.826144] The buggy address belongs to the object at ffff88800dcdc2b8 [ 30.826144] which belongs to the cache vm_area_struct of size 168 [ 30.827709] The buggy address is located 88 bytes inside of [ 30.827709] freed 168-byte region [ffff88800dcdc2b8, ffff88800dcdc360) [ 30.829216] [ 30.829465] The buggy address belongs to the physical page: [ 30.830158] page:00000000537407b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcdc [ 30.831321] memcg:ffff88800df97001 [ 30.831783] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.832475] page_type: 0xffffffff() [ 30.832961] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.833935] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df97001 [ 30.834866] page dumped because: kasan: bad access detected [ 30.835552] [ 30.835780] Memory state around the buggy address: [ 30.836392] ffff88800dcdc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.837280] ffff88800dcdc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.838161] >ffff88800dcdc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.839020] ^ [ 30.839509] ffff88800dcdc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.840382] ffff88800dcdc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.841272] ================================================================== [ 30.842346] Disabling lock debugging due to kernel taint [ 33.658208] BUG: Bad rss-counter state mm:00000000c2136d50 type:MM_FILEPAGES val:33 [ 33.659392] BUG: Bad rss-counter state mm:00000000c2136d50 type:MM_ANONPAGES val:22 [ 34.066087] BUG: Bad rss-counter state mm:000000002b7a5609 type:MM_FILEPAGES val:33 [ 34.067175] BUG: Bad rss-counter state mm:000000002b7a5609 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31473' (ECDSA) to the list of known hosts. 2023/06/21 00:37:00 fuzzer started 2023/06/21 00:37:00 dialing manager at localhost:36067 2023/06/21 00:37:00 checking machine... 2023/06/21 00:37:00 checking revisions... [ 34.823652] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:37:00 testing simple program... [ 34.876602] cgroup: Unknown subsys name 'net' [ 34.948192] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:37:00 Registers: info registers vcpu 0 RAX=1ffff1100138a743 RBX=ffff888009c539e8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888009c53a18 RBP=ffff88800e025000 RSP=ffff8880094b7858 R8 =0000000000000001 R9 =ffffed1001296eff R10=0000000000000003 R11=00000000000c0000 R12=dffffc0000000000 R13=ffff88800e003980 R14=ffffffff81803033 R15=ffff88800eabbb80 RIP=ffffffff818464e2 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 00007f9148b15700 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=00007ffd475ef738 CR3=000000000e526000 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=2039353a36333a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a36333a3030203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad720 RCX=ffff88801818f968 RDX=1ffff11003031f24 RSI=ffff88801818f960 RDI=ffffffff813ad720 RBP=ffffffff813ad720 RSP=ffff88801818f870 R8 =0000000000000001 R9 =ffff88801818f908 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000001 R13=0000000000000000 R14=ffff8880142ed1c0 R15=ffff888018e85218 RIP=ffffffff811fc771 RFL=00000283 [--S---C] 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 00007ff7f0e68900 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=00007ff7f141f618 CR3=000000000e74e000 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=563412feff00545000000000000080fe 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