syzkaller login: [ 38.759529] BUG: Bad rss-counter state mm:0000000043db0570 type:MM_FILEPAGES val:33 [ 38.760752] BUG: Bad rss-counter state mm:0000000043db0570 type:MM_ANONPAGES val:22 [ 38.928598] ================================================================== [ 38.929576] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.930594] Read of size 8 at addr ffff88800d515310 by task sshd/221 [ 38.931500] [ 38.931740] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.932664] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.933718] Call Trace: [ 38.934063] [ 38.934361] dump_stack_lvl+0x91/0xf0 [ 38.934890] print_report+0xcc/0x620 [ 38.935432] ? __virt_addr_valid+0x102/0x340 [ 38.936043] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.936694] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.937356] kasan_report+0xbe/0xf0 [ 38.937886] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.938539] vma_interval_tree_remove+0xc75/0xec0 [ 38.939192] vma_prepare+0xc54/0x11a0 [ 38.939717] __split_vma+0x5af/0x950 [ 38.940240] ? __pfx___split_vma+0x10/0x10 [ 38.940819] ? find_held_lock+0x2c/0x110 [ 38.941375] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.941989] ? lock_is_held_type+0x9f/0x120 [ 38.942560] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.943219] ? mtree_range_walk+0x632/0x900 [ 38.943866] ? mas_walk+0x5c7/0x7c0 [ 38.944375] do_vmi_munmap+0x1f1/0x2b0 [ 38.944913] mmap_region+0x1f9/0x2660 [ 38.945427] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.946000] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.946766] ? __pfx_lock_acquire+0x10/0x10 [ 38.947352] ? __pfx_mmap_region+0x10/0x10 [ 38.947945] ? security_mmap_addr+0x7d/0xa0 [ 38.948518] ? get_unmapped_area+0x1f5/0x3f0 [ 38.949117] do_mmap+0x854/0xf00 [ 38.949588] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.950129] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.950739] ksys_mmap_pgoff+0x3af/0x500 [ 38.951315] do_syscall_64+0x3f/0x90 [ 38.951854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.952544] RIP: 0033:0x7f18e9eead82 [ 38.953039] 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 [ 38.955336] RSP: 002b:00007ffe1e397178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.956325] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18e9eead82 [ 38.957237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18e9324000 [ 38.958146] RBP: 00007f18e9324000 R08: 0000000000000009 R09: 0000000000001000 [ 38.959062] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564be52a0d90 [ 38.960070] R13: 00007ffe1e397190 R14: 00007ffe1e3971c0 R15: 00007ffe1e397520 [ 38.961051] [ 38.961370] [ 38.961596] Allocated by task 214: [ 38.962074] kasan_save_stack+0x22/0x50 [ 38.962614] kasan_set_track+0x25/0x30 [ 38.963163] __kasan_slab_alloc+0x59/0x70 [ 38.963798] kmem_cache_alloc+0x16b/0x370 [ 38.964527] vm_area_dup+0x20/0x160 [ 38.965170] __split_vma+0x170/0x950 [ 38.965828] split_vma+0xc6/0x110 [ 38.966393] mprotect_fixup+0x8d2/0xb30 [ 38.966961] do_mprotect_pkey+0x87e/0xd40 [ 38.967531] __x64_sys_mprotect+0x78/0xc0 [ 38.968101] do_syscall_64+0x3f/0x90 [ 38.968611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.969304] [ 38.969537] Freed by task 214: [ 38.969980] kasan_save_stack+0x22/0x50 [ 38.970519] kasan_set_track+0x25/0x30 [ 38.971054] kasan_save_free_info+0x2b/0x50 [ 38.971640] __kasan_slab_free+0x10a/0x190 [ 38.972213] kmem_cache_free+0x10d/0x4d0 [ 38.972759] rcu_core+0x8c8/0x2860 [ 38.973230] __do_softirq+0x1b7/0x7d4 [ 38.973750] [ 38.973991] Last potentially related work creation: [ 38.974609] kasan_save_stack+0x22/0x50 [ 38.975154] __kasan_record_aux_stack+0x8e/0xa0 [ 38.975795] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.976490] remove_vma+0x139/0x170 [ 38.976985] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.977572] do_vmi_munmap+0x1f1/0x2b0 [ 38.978115] __vm_munmap+0x138/0x3a0 [ 38.978616] __x64_sys_munmap+0x59/0x80 [ 38.979157] do_syscall_64+0x3f/0x90 [ 38.979673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.980373] [ 38.980599] Second to last potentially related work creation: [ 38.981335] kasan_save_stack+0x22/0x50 [ 38.981895] __kasan_record_aux_stack+0x8e/0xa0 [ 38.982511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.983207] remove_vma+0x139/0x170 [ 38.983725] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.984327] do_vmi_munmap+0x1f1/0x2b0 [ 38.984856] mmap_region+0x1f9/0x2660 [ 38.985368] do_mmap+0x854/0xf00 [ 38.985861] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.986390] ksys_mmap_pgoff+0x3af/0x500 [ 38.986953] do_syscall_64+0x3f/0x90 [ 38.987474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.988217] [ 38.988455] The buggy address belongs to the object at ffff88800d5152b8 [ 38.988455] which belongs to the cache vm_area_struct of size 168 [ 38.990023] The buggy address is located 88 bytes inside of [ 38.990023] freed 168-byte region [ffff88800d5152b8, ffff88800d515360) [ 38.991551] [ 38.991798] The buggy address belongs to the physical page: [ 38.992503] page:000000007f2f2203 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd515 [ 38.993666] memcg:ffff88800de36901 [ 38.994132] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.994896] page_type: 0xffffffff() [ 38.995402] raw: 0100000000000200 ffff88800879fc80 ffffea000038c940 dead000000000005 [ 38.996385] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de36901 [ 38.997365] page dumped because: kasan: bad access detected [ 38.998080] [ 38.998307] Memory state around the buggy address: [ 38.998948] ffff88800d515200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.999880] ffff88800d515280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.000791] >ffff88800d515300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.001694] ^ [ 39.002196] ffff88800d515380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.003113] ffff88800d515400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.004046] ================================================================== [ 39.005103] Disabling lock debugging due to kernel taint [ 41.231720] BUG: Bad rss-counter state mm:0000000041d96788 type:MM_FILEPAGES val:33 [ 41.232740] BUG: Bad rss-counter state mm:0000000041d96788 type:MM_ANONPAGES val:22 [ 41.755366] BUG: Bad rss-counter state mm:0000000033708389 type:MM_FILEPAGES val:33 [ 41.756399] BUG: Bad rss-counter state mm:0000000033708389 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39762' (ECDSA) to the list of known hosts. 2023/06/20 04:38:31 fuzzer started 2023/06/20 04:38:31 dialing manager at localhost:44161 2023/06/20 04:38:31 checking machine... 2023/06/20 04:38:31 checking revisions... [ 42.442192] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:38:32 testing simple program... [ 42.498766] cgroup: Unknown subsys name 'net' [ 42.546218] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:38:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f4776464650 CR3=000000000cbba000 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=2031333a38333a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a38333a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800d8c7520 RSP=ffff88800d8c7408 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88800d8c7528 R13=ffff88800d8c7510 R14=ffff88800d8c74c8 R15=ffff88800d8c74c8 RIP=ffffffff81130bc6 RFL=00000297 [--S-APC] 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 00007f2f9602e900 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=00007f2f954c5750 CR3=000000000d7e6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=667d34d296c5933700000000000ae988 XMM05=a4395f683e2afa830000000000136958 XMM06=e4cb8bb95a7664b600000000001354a0 XMM07=fb795ef6d65770560000000000124928 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000