syzkaller login: [ 30.564649] BUG: Bad rss-counter state mm:0000000044eace3b type:MM_FILEPAGES val:33 [ 30.566028] BUG: Bad rss-counter state mm:0000000044eace3b type:MM_ANONPAGES val:22 [ 30.723785] ================================================================== [ 30.724673] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.725600] Read of size 8 at addr ffff888016439140 by task sshd/220 [ 30.726462] [ 30.726687] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.727550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.728531] Call Trace: [ 30.728846] [ 30.729132] dump_stack_lvl+0x91/0xf0 [ 30.729624] print_report+0xcc/0x620 [ 30.730107] ? __virt_addr_valid+0x102/0x340 [ 30.730679] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.731289] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.731898] kasan_report+0xbe/0xf0 [ 30.732371] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.732984] vma_interval_tree_remove+0xc75/0xec0 [ 30.733580] vma_prepare+0xc54/0x11a0 [ 30.734049] __split_vma+0x5af/0x950 [ 30.734523] ? __pfx___split_vma+0x10/0x10 [ 30.735051] ? find_held_lock+0x2c/0x110 [ 30.735574] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.736145] ? lock_is_held_type+0x9f/0x120 [ 30.736681] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.737281] ? mtree_range_walk+0x632/0x900 [ 30.737823] ? mas_walk+0x5c7/0x7c0 [ 30.738302] do_vmi_munmap+0x1f1/0x2b0 [ 30.738804] mmap_region+0x1f9/0x2660 [ 30.739284] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.739802] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.740512] ? __pfx_lock_acquire+0x10/0x10 [ 30.741043] ? __pfx_mmap_region+0x10/0x10 [ 30.741573] ? security_mmap_addr+0x7d/0xa0 [ 30.742096] ? get_unmapped_area+0x1f5/0x3f0 [ 30.742656] do_mmap+0x854/0xf00 [ 30.743099] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.743590] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.744145] ksys_mmap_pgoff+0x3af/0x500 [ 30.744646] do_syscall_64+0x3f/0x90 [ 30.745122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.745772] RIP: 0033:0x7f1e29cd9d82 [ 30.746230] 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 [ 30.748346] RSP: 002b:00007ffee4d257e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.749262] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e29cd9d82 [ 30.750119] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e29113000 [ 30.750986] RBP: 00007f1e29113000 R08: 0000000000000009 R09: 0000000000001000 [ 30.751817] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f46127dec0 [ 30.752657] R13: 00007ffee4d25800 R14: 00007ffee4d25830 R15: 00007ffee4d25b90 [ 30.753510] [ 30.753798] [ 30.754014] Allocated by task 213: [ 30.754438] kasan_save_stack+0x22/0x50 [ 30.754942] kasan_set_track+0x25/0x30 [ 30.755431] __kasan_slab_alloc+0x59/0x70 [ 30.755948] kmem_cache_alloc+0x16b/0x370 [ 30.756461] vm_area_dup+0x20/0x160 [ 30.756907] __split_vma+0x170/0x950 [ 30.757365] split_vma+0xc6/0x110 [ 30.757800] mprotect_fixup+0x8d2/0xb30 [ 30.758295] do_mprotect_pkey+0x87e/0xd40 [ 30.758811] __x64_sys_mprotect+0x78/0xc0 [ 30.759328] do_syscall_64+0x3f/0x90 [ 30.759796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.760438] [ 30.760649] Freed by task 213: [ 30.761032] kasan_save_stack+0x22/0x50 [ 30.761528] kasan_set_track+0x25/0x30 [ 30.762014] kasan_save_free_info+0x2b/0x50 [ 30.762559] __kasan_slab_free+0x10a/0x190 [ 30.763085] kmem_cache_free+0x10d/0x4d0 [ 30.763589] rcu_core+0x8c8/0x2860 [ 30.764025] __do_softirq+0x1b7/0x7d4 [ 30.764499] [ 30.764712] Last potentially related work creation: [ 30.765292] kasan_save_stack+0x22/0x50 [ 30.765789] __kasan_record_aux_stack+0x8e/0xa0 [ 30.766357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.766998] remove_vma+0x139/0x170 [ 30.767442] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.767987] do_vmi_munmap+0x1f1/0x2b0 [ 30.768473] __vm_munmap+0x138/0x3a0 [ 30.768933] __x64_sys_munmap+0x59/0x80 [ 30.769430] do_syscall_64+0x3f/0x90 [ 30.769897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.770549] [ 30.770767] The buggy address belongs to the object at ffff8880164390e8 [ 30.770767] which belongs to the cache vm_area_struct of size 168 [ 30.772232] The buggy address is located 88 bytes inside of [ 30.772232] freed 168-byte region [ffff8880164390e8, ffff888016439190) [ 30.773625] [ 30.773844] The buggy address belongs to the physical page: [ 30.774504] page:000000002cea0dd2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16439 [ 30.775615] memcg:ffff88800f07a401 [ 30.776037] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.776683] page_type: 0xffffffff() [ 30.777132] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.778052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f07a401 [ 30.778959] page dumped because: kasan: bad access detected [ 30.779629] [ 30.779851] Memory state around the buggy address: [ 30.780439] ffff888016439000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.781305] ffff888016439080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.782173] >ffff888016439100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.783040] ^ [ 30.783683] ffff888016439180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.784544] ffff888016439200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.785394] ================================================================== [ 30.786445] Disabling lock debugging due to kernel taint [ 33.242620] BUG: Bad rss-counter state mm:000000000df84d7b type:MM_FILEPAGES val:33 [ 33.243810] BUG: Bad rss-counter state mm:000000000df84d7b type:MM_ANONPAGES val:22 [ 33.715408] BUG: Bad rss-counter state mm:00000000a3185022 type:MM_FILEPAGES val:33 [ 33.716418] BUG: Bad rss-counter state mm:00000000a3185022 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64925' (ECDSA) to the list of known hosts. 2023/06/20 15:11:12 fuzzer started 2023/06/20 15:11:12 dialing manager at localhost:36067 2023/06/20 15:11:12 checking machine... 2023/06/20 15:11:12 checking revisions... [ 34.352412] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:11:12 testing simple program... [ 34.405773] cgroup: Unknown subsys name 'net' [ 34.447205] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:11:12 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806ce09920 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff88800e977580 RIP=ffffffff8180f09a RFL=00000286 [--S--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 00007f4689d8c900 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=0000562785d792a8 CR3=000000000db10000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002b81ec3 RSI=ffffffff81eeadb0 RDI=ffff888015c0f4c0 RBP=ffff888015c0f558 RSP=ffff888015c0f4c0 R8 =0000000000000001 R9 =ffff888015c0f500 R10=0000000000038001 R11=0000000000020d09 R12=ffff888015c0f588 R13=0000000000000000 R14=ffff8880145551c0 R15=1ffff11002b81f1d RIP=ffffffff810bd052 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 00007fa82717a900 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=00007fa8265f3c40 CR3=000000000ca46000 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=440bf7f78bc08e816d44f974f5ce4d87 XMM02=000000000011a510d59e07bde36eea69 XMM03=000000000011a638ec2efd57dc4c00df XMM04=3df02f165d9a8b0700000000000ae988 XMM05=09ddc3a223f6f7d00000000000132b30 XMM06=19e9129bd510f23500000000001319e8 XMM07=fb795ef6d65770560000000000121b78 XMM08=2c67c8bc2e329bc3000000000011a638 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000