syzkaller login: [ 30.441628] BUG: Bad rss-counter state mm:00000000dc1e7a90 type:MM_FILEPAGES val:33 [ 30.442644] BUG: Bad rss-counter state mm:00000000dc1e7a90 type:MM_ANONPAGES val:22 [ 30.604121] ================================================================== [ 30.605030] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.605967] Read of size 8 at addr ffff8880176fa6b0 by task sshd/222 [ 30.606733] [ 30.606956] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.607961] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.608973] Call Trace: [ 30.609310] <TASK> [ 30.609627] dump_stack_lvl+0x91/0xf0 [ 30.610125] print_report+0xcc/0x620 [ 30.610623] ? __virt_addr_valid+0x102/0x340 [ 30.611220] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.611866] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.612510] kasan_report+0xbe/0xf0 [ 30.613010] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.613682] vma_interval_tree_remove+0xc75/0xec0 [ 30.614346] vma_prepare+0xc54/0x11a0 [ 30.614867] __split_vma+0x5af/0x950 [ 30.615410] ? __pfx___split_vma+0x10/0x10 [ 30.615986] ? find_held_lock+0x2c/0x110 [ 30.616572] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.617178] ? lock_is_held_type+0x9f/0x120 [ 30.617778] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.618442] ? mtree_range_walk+0x632/0x900 [ 30.619036] ? mas_walk+0x5c7/0x7c0 [ 30.619577] do_vmi_munmap+0x1f1/0x2b0 [ 30.620138] mmap_region+0x1f9/0x2660 [ 30.620673] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.621240] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.622015] ? __pfx_lock_acquire+0x10/0x10 [ 30.622607] ? __pfx_mmap_region+0x10/0x10 [ 30.623198] ? security_mmap_addr+0x7d/0xa0 [ 30.623801] ? get_unmapped_area+0x1f5/0x3f0 [ 30.624416] do_mmap+0x854/0xf00 [ 30.624899] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.625468] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.626078] ksys_mmap_pgoff+0x3af/0x500 [ 30.626634] do_syscall_64+0x3f/0x90 [ 30.627161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.627865] RIP: 0033:0x7f2ff834cd82 [ 30.628397] 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 [ 30.630775] RSP: 002b:00007ffd2bfd5ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.631766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ff834cd82 [ 30.632692] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ff7786000 [ 30.633648] RBP: 00007f2ff7786000 R08: 0000000000000009 R09: 0000000000001000 [ 30.634569] R10: 0000000000000812 R11: 0000000000000206 R12: 000056414ab9bec0 [ 30.635490] R13: 00007ffd2bfd6010 R14: 00007ffd2bfd6040 R15: 00007ffd2bfd63a0 [ 30.636442] </TASK> [ 30.636755] [ 30.636991] Allocated by task 215: [ 30.637479] kasan_save_stack+0x22/0x50 [ 30.638033] kasan_set_track+0x25/0x30 [ 30.638569] __kasan_slab_alloc+0x59/0x70 [ 30.639128] kmem_cache_alloc+0x16b/0x370 [ 30.639685] vm_area_dup+0x20/0x160 [ 30.640208] __split_vma+0x170/0x950 [ 30.640713] split_vma+0xc6/0x110 [ 30.641207] mprotect_fixup+0x8d2/0xb30 [ 30.641786] do_mprotect_pkey+0x87e/0xd40 [ 30.642363] __x64_sys_mprotect+0x78/0xc0 [ 30.642932] do_syscall_64+0x3f/0x90 [ 30.643440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.644156] [ 30.644395] Freed by task 215: [ 30.644818] kasan_save_stack+0x22/0x50 [ 30.645394] kasan_set_track+0x25/0x30 [ 30.645931] kasan_save_free_info+0x2b/0x50 [ 30.646519] __kasan_slab_free+0x10a/0x190 [ 30.647102] kmem_cache_free+0x10d/0x4d0 [ 30.647658] rcu_core+0x8c8/0x2860 [ 30.648170] __do_softirq+0x1b7/0x7d4 [ 30.648757] [ 30.648990] Last potentially related work creation: [ 30.649658] kasan_save_stack+0x22/0x50 [ 30.650207] __kasan_record_aux_stack+0x8e/0xa0 [ 30.650833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.651535] remove_vma+0x139/0x170 [ 30.652023] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.652650] do_vmi_munmap+0x1f1/0x2b0 [ 30.653183] __vm_munmap+0x138/0x3a0 [ 30.653718] __x64_sys_munmap+0x59/0x80 [ 30.654264] do_syscall_64+0x3f/0x90 [ 30.654775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.655466] [ 30.655702] The buggy address belongs to the object at ffff8880176fa658 [ 30.655702] which belongs to the cache vm_area_struct of size 168 [ 30.657365] The buggy address is located 88 bytes inside of [ 30.657365] freed 168-byte region [ffff8880176fa658, ffff8880176fa700) [ 30.658887] [ 30.659123] The buggy address belongs to the physical page: [ 30.659839] page:00000000b5a083fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x176fa [ 30.661062] memcg:ffff8880199d8501 [ 30.661558] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.662253] page_type: 0xffffffff() [ 30.662746] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.663762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199d8501 [ 30.664776] page dumped because: kasan: bad access detected [ 30.665533] [ 30.665767] Memory state around the buggy address: [ 30.666390] ffff8880176fa580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.667332] ffff8880176fa600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.668280] >ffff8880176fa680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.669214] ^ [ 30.669881] ffff8880176fa700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.670811] ffff8880176fa780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.671746] ================================================================== [ 30.672788] Disabling lock debugging due to kernel taint [ 32.997263] BUG: Bad rss-counter state mm:000000008d4a6c55 type:MM_FILEPAGES val:33 [ 32.998655] BUG: Bad rss-counter state mm:000000008d4a6c55 type:MM_ANONPAGES val:22 [ 33.539273] BUG: Bad rss-counter state mm:0000000031dfa204 type:MM_FILEPAGES val:33 [ 33.540608] BUG: Bad rss-counter state mm:0000000031dfa204 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33968' (ECDSA) to the list of known hosts. 2023/06/21 03:27:33 fuzzer started 2023/06/21 03:27:33 dialing manager at localhost:36067 2023/06/21 03:27:33 checking machine... 2023/06/21 03:27:33 checking revisions... [ 34.227435] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:27:33 testing simple program... [ 34.272368] cgroup: Unknown subsys name 'net' [ 34.308607] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:27:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8451105e RCX=ffffffff860a1401 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8451105e RBP=ffffffff8451105e RSP=ffff88806ce09a48 R8 =ffffffff860a1444 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800ba43680 R15=ffff88800d98e900 RIP=ffffffff811fc6f6 RFL=00000292 [--S-A--] 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 00007f79d9865900 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=00007f79d9e1c618 CR3=000000000dfaa000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f51ec4cd930 CR3=000000000f390000 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=2033333a37323a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a37323a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000