syzkaller login: [ 35.548648] BUG: Bad rss-counter state mm:0000000085fefc74 type:MM_FILEPAGES val:33 [ 35.550523] BUG: Bad rss-counter state mm:0000000085fefc74 type:MM_ANONPAGES val:22 [ 35.714437] ================================================================== [ 35.715618] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.717016] Read of size 8 at addr ffff88800e18e3f8 by task sshd/220 [ 35.717894] [ 35.718114] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.718981] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.719981] Call Trace: [ 35.720309] [ 35.720594] dump_stack_lvl+0x91/0xf0 [ 35.721092] print_report+0xcc/0x620 [ 35.721638] ? __virt_addr_valid+0x102/0x340 [ 35.722216] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.722820] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.723431] kasan_report+0xbe/0xf0 [ 35.723916] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.724546] vma_interval_tree_remove+0xc75/0xec0 [ 35.725170] vma_prepare+0xc54/0x11a0 [ 35.725655] __split_vma+0x5af/0x950 [ 35.726129] ? __pfx___split_vma+0x10/0x10 [ 35.726682] ? find_held_lock+0x2c/0x110 [ 35.727230] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.727809] ? lock_is_held_type+0x9f/0x120 [ 35.728414] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.729174] ? mtree_range_walk+0x632/0x900 [ 35.729779] ? mas_walk+0x5c7/0x7c0 [ 35.730325] do_vmi_munmap+0x1f1/0x2b0 [ 35.730866] mmap_region+0x1f9/0x2660 [ 35.731431] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.732061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.732781] ? __pfx_lock_acquire+0x10/0x10 [ 35.733326] ? __pfx_mmap_region+0x10/0x10 [ 35.733862] ? security_mmap_addr+0x7d/0xa0 [ 35.734407] ? get_unmapped_area+0x1f5/0x3f0 [ 35.735038] do_mmap+0x854/0xf00 [ 35.735500] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.736017] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.736604] ksys_mmap_pgoff+0x3af/0x500 [ 35.737146] do_syscall_64+0x3f/0x90 [ 35.737643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.738383] RIP: 0033:0x7fae834d1d82 [ 35.738867] 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 [ 35.741010] RSP: 002b:00007ffcb928e7a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.741957] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae834d1d82 [ 35.742778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae8290b000 [ 35.743580] RBP: 00007fae8290b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.744455] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3f2c4cec0 [ 35.745337] R13: 00007ffcb928e7c0 R14: 00007ffcb928e7f0 R15: 00007ffcb928eb50 [ 35.746207] [ 35.746508] [ 35.746725] Allocated by task 213: [ 35.747148] kasan_save_stack+0x22/0x50 [ 35.747666] kasan_set_track+0x25/0x30 [ 35.748168] __kasan_slab_alloc+0x59/0x70 [ 35.748708] kmem_cache_alloc+0x16b/0x370 [ 35.749248] vm_area_dup+0x20/0x160 [ 35.749713] __split_vma+0x170/0x950 [ 35.750196] split_vma+0xc6/0x110 [ 35.750652] mprotect_fixup+0x8d2/0xb30 [ 35.751163] do_mprotect_pkey+0x87e/0xd40 [ 35.751700] __x64_sys_mprotect+0x78/0xc0 [ 35.752219] do_syscall_64+0x3f/0x90 [ 35.752693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.753358] [ 35.753572] Freed by task 213: [ 35.753965] kasan_save_stack+0x22/0x50 [ 35.754479] kasan_set_track+0x25/0x30 [ 35.754982] kasan_save_free_info+0x2b/0x50 [ 35.755527] __kasan_slab_free+0x10a/0x190 [ 35.756079] kmem_cache_free+0x10d/0x4d0 [ 35.756602] rcu_core+0x8c8/0x2860 [ 35.757081] __do_softirq+0x1b7/0x7d4 [ 35.757581] [ 35.757799] Last potentially related work creation: [ 35.758483] kasan_save_stack+0x22/0x50 [ 35.758993] __kasan_record_aux_stack+0x8e/0xa0 [ 35.759578] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.760230] remove_vma+0x139/0x170 [ 35.760686] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.761305] do_vmi_munmap+0x1f1/0x2b0 [ 35.761795] __vm_munmap+0x138/0x3a0 [ 35.762281] __x64_sys_munmap+0x59/0x80 [ 35.762801] do_syscall_64+0x3f/0x90 [ 35.763298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.763971] [ 35.764188] Second to last potentially related work creation: [ 35.764910] kasan_save_stack+0x22/0x50 [ 35.765447] __kasan_record_aux_stack+0x8e/0xa0 [ 35.766032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.766673] remove_vma+0x139/0x170 [ 35.767128] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.767680] do_vmi_munmap+0x1f1/0x2b0 [ 35.768181] mmap_region+0x1f9/0x2660 [ 35.768663] do_mmap+0x854/0xf00 [ 35.769117] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.769606] ksys_mmap_pgoff+0x3af/0x500 [ 35.770111] do_syscall_64+0x3f/0x90 [ 35.770587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.771227] [ 35.771440] The buggy address belongs to the object at ffff88800e18e3a0 [ 35.771440] which belongs to the cache vm_area_struct of size 168 [ 35.772897] The buggy address is located 88 bytes inside of [ 35.772897] freed 168-byte region [ffff88800e18e3a0, ffff88800e18e448) [ 35.774314] [ 35.774536] The buggy address belongs to the physical page: [ 35.775221] page:0000000004145ef2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe18e [ 35.776317] memcg:ffff88800e169101 [ 35.776742] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.777490] page_type: 0xffffffff() [ 35.777949] raw: 0100000000000200 ffff8880087a0c80 ffffea0000593040 dead000000000005 [ 35.778914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e169101 [ 35.779872] page dumped because: kasan: bad access detected [ 35.780570] [ 35.780792] Memory state around the buggy address: [ 35.781398] ffff88800e18e280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.782247] ffff88800e18e300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.783092] >ffff88800e18e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.783931] ^ [ 35.784775] ffff88800e18e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.785640] ffff88800e18e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.786493] ================================================================== [ 35.787548] Disabling lock debugging due to kernel taint [ 38.291976] BUG: Bad rss-counter state mm:000000002020cd26 type:MM_FILEPAGES val:33 [ 38.292731] BUG: Bad rss-counter state mm:000000002020cd26 type:MM_ANONPAGES val:22 [ 38.679762] BUG: Bad rss-counter state mm:00000000f2ce7c21 type:MM_FILEPAGES val:33 [ 38.680511] BUG: Bad rss-counter state mm:00000000f2ce7c21 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5832' (ECDSA) to the list of known hosts. 2023/06/21 05:22:19 fuzzer started 2023/06/21 05:22:19 dialing manager at localhost:36067 2023/06/21 05:22:19 checking machine... 2023/06/21 05:22:19 checking revisions... [ 39.348577] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:22:19 testing simple program... [ 39.395092] cgroup: Unknown subsys name 'net' [ 39.459790] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:22:19 Registers: info registers vcpu 0 RAX=ffff88800fef8001 RBX=ffff88800fef7f20 RCX=0000000000000001 RDX=ffff88800fef7f28 RSI=ffff88800fef7ef0 RDI=ffff88806ce09aa8 RBP=ffff88800fef0000 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a966 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800fef7ef0 R15=ffff88806ce09a98 RIP=ffffffff81131cda 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 00007f1f53167900 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=00007f1f5371f0b0 CR3=0000000019b72000 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=2038313a32323a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a32323a3530203132 XMM08=69767265733d7373616c63742030733a 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=ffff888008c04400 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=00007f5eb0ac86d0 CR3=000000000ed72000 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=333c8af7558362989f4377da59216047 XMM02=000000000011b3a8ec2efd57dc4c00df XMM03=00000000001221183a728d0a620bd7ca XMM04=7689cdf083222f8f00000000000ae988 XMM05=19e9129bd510f2350000000000133030 XMM06=1e358d2d69990eb90000000000132208 XMM07=e042d86d42eb936e00000000001223f0 XMM08=3a728d0a620bd7ca000000000011b408 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000