syzkaller login: [ 30.588131] BUG: Bad rss-counter state mm:00000000113967df type:MM_FILEPAGES val:33 [ 30.589639] BUG: Bad rss-counter state mm:00000000113967df type:MM_ANONPAGES val:22 [ 30.737432] ================================================================== [ 30.738513] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.739665] Read of size 8 at addr ffff888019eaced8 by task sshd/221 [ 30.740515] [ 30.740722] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.741532] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.742463] Call Trace: [ 30.742779] [ 30.743051] dump_stack_lvl+0x91/0xf0 [ 30.743513] print_report+0xcc/0x620 [ 30.743975] ? __virt_addr_valid+0x102/0x340 [ 30.744494] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.745081] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.745660] kasan_report+0xbe/0xf0 [ 30.746111] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746701] vma_interval_tree_remove+0xc75/0xec0 [ 30.747296] vma_prepare+0xc54/0x11a0 [ 30.747751] __split_vma+0x5af/0x950 [ 30.748236] ? __pfx___split_vma+0x10/0x10 [ 30.748766] ? find_held_lock+0x2c/0x110 [ 30.749280] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.749848] ? lock_is_held_type+0x9f/0x120 [ 30.750393] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.751017] ? mtree_range_walk+0x632/0x900 [ 30.751568] ? mas_walk+0x5c7/0x7c0 [ 30.752050] do_vmi_munmap+0x1f1/0x2b0 [ 30.752545] mmap_region+0x1f9/0x2660 [ 30.753033] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.753552] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.754276] ? __pfx_lock_acquire+0x10/0x10 [ 30.754815] ? __pfx_mmap_region+0x10/0x10 [ 30.755356] ? security_mmap_addr+0x7d/0xa0 [ 30.755893] ? get_unmapped_area+0x1f5/0x3f0 [ 30.756442] do_mmap+0x854/0xf00 [ 30.756880] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.757377] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.757941] ksys_mmap_pgoff+0x3af/0x500 [ 30.758450] do_syscall_64+0x3f/0x90 [ 30.758955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.759603] RIP: 0033:0x7fa0cb100d82 [ 30.760058] 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 [ 30.762207] RSP: 002b:00007ffe596ae498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.763119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0cb100d82 [ 30.763971] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0ca53a000 [ 30.764817] RBP: 00007fa0ca53a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.765667] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad653ddf70 [ 30.766526] R13: 00007ffe596ae4b0 R14: 00007ffe596ae4e0 R15: 00007ffe596ae840 [ 30.767400] [ 30.767688] [ 30.767903] Allocated by task 214: [ 30.768331] kasan_save_stack+0x22/0x50 [ 30.768834] kasan_set_track+0x25/0x30 [ 30.769327] __kasan_slab_alloc+0x59/0x70 [ 30.769849] kmem_cache_alloc+0x16b/0x370 [ 30.770370] vm_area_dup+0x20/0x160 [ 30.770827] __split_vma+0x170/0x950 [ 30.771291] split_vma+0xc6/0x110 [ 30.771727] mprotect_fixup+0x8d2/0xb30 [ 30.772237] do_mprotect_pkey+0x87e/0xd40 [ 30.772755] __x64_sys_mprotect+0x78/0xc0 [ 30.773286] do_syscall_64+0x3f/0x90 [ 30.773770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.774425] [ 30.774646] Freed by task 214: [ 30.775055] kasan_save_stack+0x22/0x50 [ 30.775563] kasan_set_track+0x25/0x30 [ 30.776049] kasan_save_free_info+0x2b/0x50 [ 30.776553] __kasan_slab_free+0x10a/0x190 [ 30.777077] kmem_cache_free+0x10d/0x4d0 [ 30.777572] rcu_core+0x8c8/0x2860 [ 30.778020] __do_softirq+0x1b7/0x7d4 [ 30.778486] [ 30.778704] Last potentially related work creation: [ 30.779313] kasan_save_stack+0x22/0x50 [ 30.779818] __kasan_record_aux_stack+0x8e/0xa0 [ 30.780390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.781028] remove_vma+0x139/0x170 [ 30.781484] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.782043] do_vmi_munmap+0x1f1/0x2b0 [ 30.782521] __vm_munmap+0x138/0x3a0 [ 30.782998] __x64_sys_munmap+0x59/0x80 [ 30.783491] do_syscall_64+0x3f/0x90 [ 30.783960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.784611] [ 30.784822] The buggy address belongs to the object at ffff888019eace80 [ 30.784822] which belongs to the cache vm_area_struct of size 168 [ 30.786303] The buggy address is located 88 bytes inside of [ 30.786303] freed 168-byte region [ffff888019eace80, ffff888019eacf28) [ 30.787743] [ 30.787959] The buggy address belongs to the physical page: [ 30.788622] page:0000000039a4a852 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19eac [ 30.789723] memcg:ffff888019eaa201 [ 30.790149] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.790798] page_type: 0xffffffff() [ 30.791247] raw: 0100000000000200 ffff8880087a0c80 ffffea000067d640 0000000000000004 [ 30.792169] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019eaa201 [ 30.793076] page dumped because: kasan: bad access detected [ 30.793735] [ 30.793951] Memory state around the buggy address: [ 30.794536] ffff888019eacd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.795417] ffff888019eace00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.796281] >ffff888019eace80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.797136] ^ [ 30.797861] ffff888019eacf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.798716] ffff888019eacf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.799572] ================================================================== [ 30.800584] Disabling lock debugging due to kernel taint [ 33.751015] BUG: Bad rss-counter state mm:00000000fa72c4ee type:MM_FILEPAGES val:33 [ 33.752095] BUG: Bad rss-counter state mm:00000000fa72c4ee type:MM_ANONPAGES val:22 [ 34.304733] BUG: Bad rss-counter state mm:00000000fe12a7d3 type:MM_FILEPAGES val:33 [ 34.305929] BUG: Bad rss-counter state mm:00000000fe12a7d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14607' (ECDSA) to the list of known hosts. 2023/06/20 11:13:50 fuzzer started 2023/06/20 11:13:50 dialing manager at localhost:36067 2023/06/20 11:13:50 checking machine... 2023/06/20 11:13:50 checking revisions... [ 34.963325] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:13:51 testing simple program... [ 35.000896] cgroup: Unknown subsys name 'net' [ 35.039334] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:13:50 Registers: info registers vcpu 0 RAX=ffff88800d8ffad0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800d8ffa01 RSI=ffff88800d8ffa60 RDI=ffff88800d8ffa60 RBP=ffff88800d8ff750 RSP=ffff88800d8ff688 R8 =0000000000000001 R9 =ffff88800d8ff738 R10=0000000000038001 R11=0000000000020de5 R12=ffff88800d8ff758 R13=ffff88800d8ff740 R14=ffff88800d8ffa60 R15=ffff88800d8ff6f8 RIP=ffffffff81131236 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 00007f2c83440900 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=00007f2c828a72c0 CR3=000000000c49e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=57b3e630e4b23ec200000000000ae988 XMM05=8342caf459c8eb350000000000132a10 XMM06=e80c7603c79a51ad00000000001317b0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f5b7f97d0b0 CR3=000000000da86000 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=2030353a33313a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a33313a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000