syzkaller login: [ 31.201276] BUG: Bad rss-counter state mm:000000007628d29e type:MM_FILEPAGES val:33 [ 31.202921] BUG: Bad rss-counter state mm:000000007628d29e type:MM_ANONPAGES val:22 [ 31.371832] ================================================================== [ 31.373033] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.374421] Read of size 8 at addr ffff88800e363968 by task sshd/220 [ 31.375231] [ 31.375478] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.376401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.377463] Call Trace: [ 31.377784] [ 31.378071] dump_stack_lvl+0x91/0xf0 [ 31.378577] print_report+0xcc/0x620 [ 31.379068] ? __virt_addr_valid+0x102/0x340 [ 31.379637] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.380288] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.380925] kasan_report+0xbe/0xf0 [ 31.381451] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.382089] vma_interval_tree_remove+0xc75/0xec0 [ 31.382726] vma_prepare+0xc54/0x11a0 [ 31.383212] __split_vma+0x5af/0x950 [ 31.383724] ? __pfx___split_vma+0x10/0x10 [ 31.384275] ? find_held_lock+0x2c/0x110 [ 31.384827] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.385467] ? lock_is_held_type+0x9f/0x120 [ 31.386012] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.386647] ? mtree_range_walk+0x632/0x900 [ 31.387224] ? mas_walk+0x5c7/0x7c0 [ 31.387747] do_vmi_munmap+0x1f1/0x2b0 [ 31.388252] mmap_region+0x1f9/0x2660 [ 31.388773] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.389353] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.390084] ? __pfx_lock_acquire+0x10/0x10 [ 31.390678] ? __pfx_mmap_region+0x10/0x10 [ 31.391223] ? security_mmap_addr+0x7d/0xa0 [ 31.391775] ? get_unmapped_area+0x1f5/0x3f0 [ 31.392364] do_mmap+0x854/0xf00 [ 31.392808] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.393369] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.393980] ksys_mmap_pgoff+0x3af/0x500 [ 31.394507] do_syscall_64+0x3f/0x90 [ 31.394992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.395661] RIP: 0033:0x7f22f8552d82 [ 31.396132] 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 [ 31.398379] RSP: 002b:00007ffea4fc6d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.399312] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22f8552d82 [ 31.400174] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22f798c000 [ 31.401080] RBP: 00007f22f798c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.401959] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c80cef8ec0 [ 31.402841] R13: 00007ffea4fc6d60 R14: 00007ffea4fc6d90 R15: 00007ffea4fc70f0 [ 31.403735] [ 31.404029] [ 31.404256] Allocated by task 213: [ 31.404709] kasan_save_stack+0x22/0x50 [ 31.405283] kasan_set_track+0x25/0x30 [ 31.405793] __kasan_slab_alloc+0x59/0x70 [ 31.406350] kmem_cache_alloc+0x16b/0x370 [ 31.406882] vm_area_dup+0x20/0x160 [ 31.407348] __split_vma+0x170/0x950 [ 31.407823] split_vma+0xc6/0x110 [ 31.408282] mprotect_fixup+0x8d2/0xb30 [ 31.408816] do_mprotect_pkey+0x87e/0xd40 [ 31.409391] __x64_sys_mprotect+0x78/0xc0 [ 31.409914] do_syscall_64+0x3f/0x90 [ 31.410413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.411066] [ 31.411307] Freed by task 213: [ 31.411708] kasan_save_stack+0x22/0x50 [ 31.412221] kasan_set_track+0x25/0x30 [ 31.412750] kasan_save_free_info+0x2b/0x50 [ 31.413329] __kasan_slab_free+0x10a/0x190 [ 31.413864] kmem_cache_free+0x10d/0x4d0 [ 31.414390] rcu_core+0x8c8/0x2860 [ 31.414912] __do_softirq+0x1b7/0x7d4 [ 31.415429] [ 31.415648] Last potentially related work creation: [ 31.416244] kasan_save_stack+0x22/0x50 [ 31.416779] __kasan_record_aux_stack+0x8e/0xa0 [ 31.417420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.418074] remove_vma+0x139/0x170 [ 31.418546] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.419110] do_vmi_munmap+0x1f1/0x2b0 [ 31.419623] __vm_munmap+0x138/0x3a0 [ 31.420099] __x64_sys_munmap+0x59/0x80 [ 31.420641] do_syscall_64+0x3f/0x90 [ 31.421153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.421820] [ 31.422039] Second to last potentially related work creation: [ 31.422750] kasan_save_stack+0x22/0x50 [ 31.423285] __kasan_record_aux_stack+0x8e/0xa0 [ 31.423859] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.424546] remove_vma+0x139/0x170 [ 31.425056] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.425650] do_vmi_munmap+0x1f1/0x2b0 [ 31.426153] mmap_region+0x1f9/0x2660 [ 31.426649] do_mmap+0x854/0xf00 [ 31.427099] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.427659] ksys_mmap_pgoff+0x3af/0x500 [ 31.428189] do_syscall_64+0x3f/0x90 [ 31.428707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.429442] [ 31.429662] The buggy address belongs to the object at ffff88800e363910 [ 31.429662] which belongs to the cache vm_area_struct of size 168 [ 31.431175] The buggy address is located 88 bytes inside of [ 31.431175] freed 168-byte region [ffff88800e363910, ffff88800e3639b8) [ 31.432633] [ 31.432856] The buggy address belongs to the physical page: [ 31.433566] page:0000000002b2a5a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe363 [ 31.434667] memcg:ffff88800e402c01 [ 31.435101] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.435766] page_type: 0xffffffff() [ 31.436223] raw: 0100000000000200 ffff8880087a0c80 ffffea00002cef00 dead000000000002 [ 31.437215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e402c01 [ 31.438150] page dumped because: kasan: bad access detected [ 31.438846] [ 31.439063] Memory state around the buggy address: [ 31.439672] ffff88800e363800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.440576] ffff88800e363880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.441494] >ffff88800e363900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.442376] ^ [ 31.443163] ffff88800e363980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.444066] ffff88800e363a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.444957] ================================================================== [ 31.446025] Disabling lock debugging due to kernel taint [ 33.227818] BUG: Bad rss-counter state mm:00000000a920eb88 type:MM_FILEPAGES val:33 [ 33.228602] BUG: Bad rss-counter state mm:00000000a920eb88 type:MM_ANONPAGES val:22 [ 33.680836] BUG: Bad rss-counter state mm:00000000a805fdbe type:MM_FILEPAGES val:33 [ 33.681893] BUG: Bad rss-counter state mm:00000000a805fdbe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3965' (ECDSA) to the list of known hosts. 2023/06/20 15:59:30 fuzzer started 2023/06/20 15:59:30 dialing manager at localhost:36067 2023/06/20 15:59:30 checking machine... 2023/06/20 15:59:30 checking revisions... [ 34.406253] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:59:30 testing simple program... [ 34.451585] cgroup: Unknown subsys name 'net' [ 34.490817] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:59:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff844a4f03 RDX=ffff888019cfd1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff84e39920 RSP=ffff8880169ff098 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000003 R13=0000000000000005 R14=0000000000000003 R15=00007f364c96dfff RIP=ffffffff814c02c5 RFL=00000293 [--S-A-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 00007f364c97f900 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=00007f364c95e020 CR3=000000000e7a4000 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=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 info registers vcpu 1 RAX=ffff88800f5d4000 RBX=ffffea000071cd80 RCX=0000000000000000 RDX=ffff888008d69b40 RSI=ffffffff816b65ec RDI=ffff8880199b67f0 RBP=ffff8880199b67e8 RSP=ffff888008d7f078 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=1ffff110011afe17 R13=0000000000000d82 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff84535d06 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 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=00007ffc4754ed48 CR3=0000000005482000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f15f4bc2c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=000000000000726f7475636578652d7a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000