syzkaller login: [ 39.515446] BUG: Bad rss-counter state mm:00000000eafd8771 type:MM_FILEPAGES val:33 [ 39.516729] BUG: Bad rss-counter state mm:00000000eafd8771 type:MM_ANONPAGES val:22 [ 39.560753] ================================================================== [ 39.561778] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.562890] Read of size 8 at addr ffff888016a8fd08 by task sshd/221 [ 39.563732] [ 39.563973] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.564929] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.566040] Call Trace: [ 39.566392] [ 39.566702] dump_stack_lvl+0x91/0xf0 [ 39.567238] print_report+0xcc/0x620 [ 39.567770] ? __virt_addr_valid+0x102/0x340 [ 39.568374] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.569055] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.569739] kasan_report+0xbe/0xf0 [ 39.570263] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.570940] vma_interval_tree_remove+0xc75/0xec0 [ 39.571598] vma_prepare+0xc54/0x11a0 [ 39.572133] __split_vma+0x5af/0x950 [ 39.572647] ? __pfx___split_vma+0x10/0x10 [ 39.573247] ? find_held_lock+0x2c/0x110 [ 39.573820] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.574439] ? lock_is_held_type+0x9f/0x120 [ 39.575037] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.575700] ? mtree_range_walk+0x632/0x900 [ 39.576308] ? mas_walk+0x5c7/0x7c0 [ 39.576830] do_vmi_munmap+0x1f1/0x2b0 [ 39.577388] mmap_region+0x1f9/0x2660 [ 39.577920] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.578485] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.579271] ? __pfx_lock_acquire+0x10/0x10 [ 39.579857] ? __pfx_mmap_region+0x10/0x10 [ 39.580439] ? security_mmap_addr+0x7d/0xa0 [ 39.581016] ? get_unmapped_area+0x1f5/0x3f0 [ 39.581628] do_mmap+0x854/0xf00 [ 39.582119] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.582659] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.583272] ksys_mmap_pgoff+0x3af/0x500 [ 39.583826] do_syscall_64+0x3f/0x90 [ 39.584347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.585060] RIP: 0033:0x7f7c73e0ed82 [ 39.585585] 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 [ 39.587917] RSP: 002b:00007fffc45849c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.588911] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c73e0ed82 [ 39.589850] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c73248000 [ 39.590780] RBP: 00007f7c73248000 R08: 0000000000000009 R09: 0000000000001000 [ 39.591706] R10: 0000000000000812 R11: 0000000000000206 R12: 00005642ce026ec0 [ 39.592639] R13: 00007fffc45849e0 R14: 00007fffc4584a10 R15: 00007fffc4584d70 [ 39.593600] [ 39.593928] [ 39.594164] Allocated by task 214: [ 39.594638] kasan_save_stack+0x22/0x50 [ 39.595197] kasan_set_track+0x25/0x30 [ 39.595742] __kasan_slab_alloc+0x59/0x70 [ 39.596320] kmem_cache_alloc+0x16b/0x370 [ 39.596892] vm_area_dup+0x20/0x160 [ 39.597403] __split_vma+0x170/0x950 [ 39.597920] split_vma+0xc6/0x110 [ 39.598403] mprotect_fixup+0x8d2/0xb30 [ 39.598960] do_mprotect_pkey+0x87e/0xd40 [ 39.599536] __x64_sys_mprotect+0x78/0xc0 [ 39.600116] do_syscall_64+0x3f/0x90 [ 39.600637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.601357] [ 39.601592] Freed by task 204: [ 39.602022] kasan_save_stack+0x22/0x50 [ 39.602579] kasan_set_track+0x25/0x30 [ 39.603119] kasan_save_free_info+0x2b/0x50 [ 39.603706] __kasan_slab_free+0x10a/0x190 [ 39.604293] kmem_cache_free+0x10d/0x4d0 [ 39.604848] rcu_core+0x8c8/0x2860 [ 39.605353] __do_softirq+0x1b7/0x7d4 [ 39.605877] [ 39.606114] Last potentially related work creation: [ 39.606758] kasan_save_stack+0x22/0x50 [ 39.607309] __kasan_record_aux_stack+0x8e/0xa0 [ 39.607936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.608645] remove_vma+0x139/0x170 [ 39.609153] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.609772] do_vmi_munmap+0x1f1/0x2b0 [ 39.610309] __vm_munmap+0x138/0x3a0 [ 39.610822] __x64_sys_munmap+0x59/0x80 [ 39.611372] do_syscall_64+0x3f/0x90 [ 39.611897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.612608] [ 39.612847] Second to last potentially related work creation: [ 39.613607] kasan_save_stack+0x22/0x50 [ 39.614159] __kasan_record_aux_stack+0x8e/0xa0 [ 39.614787] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.615493] remove_vma+0x139/0x170 [ 39.615991] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.616603] do_vmi_munmap+0x1f1/0x2b0 [ 39.617139] mmap_region+0x1f9/0x2660 [ 39.617689] do_mmap+0x854/0xf00 [ 39.618161] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.618701] ksys_mmap_pgoff+0x3af/0x500 [ 39.619252] do_syscall_64+0x3f/0x90 [ 39.619770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.620475] [ 39.620713] The buggy address belongs to the object at ffff888016a8fcb0 [ 39.620713] which belongs to the cache vm_area_struct of size 168 [ 39.622334] The buggy address is located 88 bytes inside of [ 39.622334] freed 168-byte region [ffff888016a8fcb0, ffff888016a8fd58) [ 39.623893] [ 39.624130] The buggy address belongs to the physical page: [ 39.624855] page:00000000fb15c344 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a8f [ 39.626063] memcg:ffff888016a89001 [ 39.626535] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.627255] page_type: 0xffffffff() [ 39.627749] raw: 0100000000000200 ffff88800879fc80 ffffea00005aa300 0000000000000004 [ 39.628765] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a89001 [ 39.629777] page dumped because: kasan: bad access detected [ 39.630504] [ 39.630739] Memory state around the buggy address: [ 39.631377] ffff888016a8fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.632317] ffff888016a8fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.633269] >ffff888016a8fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.634205] ^ [ 39.634687] ffff888016a8fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.635624] ffff888016a8fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.636565] ================================================================== [ 39.637810] Disabling lock debugging due to kernel taint [ 41.578529] BUG: Bad rss-counter state mm:00000000632b4e41 type:MM_FILEPAGES val:33 [ 41.579517] BUG: Bad rss-counter state mm:00000000632b4e41 type:MM_ANONPAGES val:22 [ 42.045551] BUG: Bad rss-counter state mm:000000005092b28c type:MM_FILEPAGES val:33 [ 42.046941] BUG: Bad rss-counter state mm:000000005092b28c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55271' (ECDSA) to the list of known hosts. 2023/06/19 16:26:09 fuzzer started 2023/06/19 16:26:09 dialing manager at localhost:44161 2023/06/19 16:26:09 checking machine... 2023/06/19 16:26:09 checking revisions... [ 42.687833] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:26:09 testing simple program... [ 42.731675] cgroup: Unknown subsys name 'net' [ 42.769335] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:26:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce361a0 RCX=0000000000000000 RDX=1ffff11002d7fc02 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff888016bfe010 RSP=ffff88800cc9f4b0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff88806ce361d0 R13=ffff88806ce361d8 R14=000000000000003f R15=ffff88800f44e000 RIP=ffffffff81827531 RFL=00000046 [---Z-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 00007f111cc9e900 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=00007fb88f2a5650 CR3=000000000ce84000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e69ea53b2d6d78a200000000000ae988 XMM05=94b388a94d239e0900000000001365d0 XMM06=e4cb8bb95a7664b60000000000134ab8 XMM07=fb795ef6d65770560000000000123f50 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff818c86c0 RDX=0000000000008c86 RSI=0000000000008c86 RDI=ffffffff8650add8 RBP=ffff888019dcf980 RSP=ffff888019dcf8b8 R8 =0000000000000000 R9 =ffff888019dcf968 R10=0000000000038001 R11=0000000000020c55 R12=ffff888019dcf988 R13=ffff888019dcf970 R14=ffff888019dcf969 R15=ffff888019dcf928 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007fb88ecf0900 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=00007fb88f2a7618 CR3=00000000183ca000 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=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