syzkaller login: [ 35.241832] BUG: Bad rss-counter state mm:0000000006c728ae type:MM_FILEPAGES val:33 [ 35.242897] BUG: Bad rss-counter state mm:0000000006c728ae type:MM_ANONPAGES val:22 [ 35.404543] ================================================================== [ 35.405472] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.406399] Read of size 8 at addr ffff88800e4dd5c8 by task sshd/219 [ 35.407164] [ 35.407382] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.408416] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.409448] Call Trace: [ 35.409767] [ 35.410070] dump_stack_lvl+0x91/0xf0 [ 35.410563] print_report+0xcc/0x620 [ 35.411059] ? __virt_addr_valid+0x102/0x340 [ 35.411619] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.412236] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.412874] kasan_report+0xbe/0xf0 [ 35.413355] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.413985] vma_interval_tree_remove+0xc75/0xec0 [ 35.414590] vma_prepare+0xc54/0x11a0 [ 35.415077] __split_vma+0x5af/0x950 [ 35.415547] ? __pfx___split_vma+0x10/0x10 [ 35.416081] ? find_held_lock+0x2c/0x110 [ 35.416618] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.417196] ? lock_is_held_type+0x9f/0x120 [ 35.417748] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.418360] ? mtree_range_walk+0x632/0x900 [ 35.418920] ? mas_walk+0x5c7/0x7c0 [ 35.419397] do_vmi_munmap+0x1f1/0x2b0 [ 35.419888] mmap_region+0x1f9/0x2660 [ 35.420399] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.420951] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.421682] ? __pfx_lock_acquire+0x10/0x10 [ 35.422219] ? __pfx_mmap_region+0x10/0x10 [ 35.422756] ? security_mmap_addr+0x7d/0xa0 [ 35.423294] ? get_unmapped_area+0x1f5/0x3f0 [ 35.423840] do_mmap+0x854/0xf00 [ 35.424281] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.424790] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.425351] ksys_mmap_pgoff+0x3af/0x500 [ 35.425879] do_syscall_64+0x3f/0x90 [ 35.426365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.427018] RIP: 0033:0x7f425a030d82 [ 35.427478] 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 [ 35.429617] RSP: 002b:00007fffb43dcf08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.430510] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f425a030d82 [ 35.431359] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f425946a000 [ 35.432192] RBP: 00007f425946a000 R08: 0000000000000009 R09: 0000000000001000 [ 35.433037] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559241e90d90 [ 35.433870] R13: 00007fffb43dcf20 R14: 00007fffb43dcf50 R15: 00007fffb43dd2b0 [ 35.434709] [ 35.434993] [ 35.435206] Allocated by task 212: [ 35.435627] kasan_save_stack+0x22/0x50 [ 35.436123] kasan_set_track+0x25/0x30 [ 35.436606] __kasan_slab_alloc+0x59/0x70 [ 35.437132] kmem_cache_alloc+0x16b/0x370 [ 35.437642] vm_area_dup+0x20/0x160 [ 35.438086] __split_vma+0x170/0x950 [ 35.438543] split_vma+0xc6/0x110 [ 35.438976] mprotect_fixup+0x8d2/0xb30 [ 35.439466] do_mprotect_pkey+0x87e/0xd40 [ 35.439975] __x64_sys_mprotect+0x78/0xc0 [ 35.440484] do_syscall_64+0x3f/0x90 [ 35.440954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.441593] [ 35.441803] Freed by task 212: [ 35.442189] kasan_save_stack+0x22/0x50 [ 35.442681] kasan_set_track+0x25/0x30 [ 35.443162] kasan_save_free_info+0x2b/0x50 [ 35.443683] __kasan_slab_free+0x10a/0x190 [ 35.444202] kmem_cache_free+0x10d/0x4d0 [ 35.444719] rcu_core+0x8c8/0x2860 [ 35.445155] __do_softirq+0x1b7/0x7d4 [ 35.445626] [ 35.445837] Last potentially related work creation: [ 35.446408] kasan_save_stack+0x22/0x50 [ 35.446903] __kasan_record_aux_stack+0x8e/0xa0 [ 35.447470] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.448097] remove_vma+0x139/0x170 [ 35.448594] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.449155] do_vmi_munmap+0x1f1/0x2b0 [ 35.449634] __vm_munmap+0x138/0x3a0 [ 35.450092] __x64_sys_munmap+0x59/0x80 [ 35.450580] do_syscall_64+0x3f/0x90 [ 35.451046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.451683] [ 35.451893] The buggy address belongs to the object at ffff88800e4dd570 [ 35.451893] which belongs to the cache vm_area_struct of size 168 [ 35.453347] The buggy address is located 88 bytes inside of [ 35.453347] freed 168-byte region [ffff88800e4dd570, ffff88800e4dd618) [ 35.454730] [ 35.454940] The buggy address belongs to the physical page: [ 35.455582] page:000000001ce140a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4dd [ 35.456646] memcg:ffff8880090ff601 [ 35.457085] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.457770] page_type: 0xffffffff() [ 35.458213] raw: 0100000000000200 ffff8880087a0c80 ffffea0000310fc0 dead000000000005 [ 35.459111] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880090ff601 [ 35.459998] page dumped because: kasan: bad access detected [ 35.460648] [ 35.460867] Memory state around the buggy address: [ 35.461444] ffff88800e4dd480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.462279] ffff88800e4dd500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 35.463128] >ffff88800e4dd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.464035] ^ [ 35.464739] ffff88800e4dd600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.465615] ffff88800e4dd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.466487] ================================================================== [ 35.467430] Disabling lock debugging due to kernel taint [ 37.456220] BUG: Bad rss-counter state mm:000000001b6f7c90 type:MM_FILEPAGES val:33 [ 37.457528] BUG: Bad rss-counter state mm:000000001b6f7c90 type:MM_ANONPAGES val:22 [ 37.921360] BUG: Bad rss-counter state mm:00000000c80aee86 type:MM_FILEPAGES val:33 [ 37.922588] BUG: Bad rss-counter state mm:00000000c80aee86 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44258' (ECDSA) to the list of known hosts. 2023/06/20 22:56:54 fuzzer started 2023/06/20 22:56:55 dialing manager at localhost:36067 2023/06/20 22:56:55 checking machine... 2023/06/20 22:56:55 checking revisions... [ 38.636386] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:56:55 testing simple program... [ 38.684834] cgroup: Unknown subsys name 'net' [ 38.741835] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:56:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100206fe4e RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88801037f258 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180feac RFL=00000246 [---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 00007efc0d0e3900 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=00007efc0c5267a0 CR3=000000000c698000 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=bca6e47117e848ec00000000000ae988 XMM05=f516036451a97a4a0000000000132780 XMM06=45700ffc4bc8349d00000000001314b8 XMM07=fb795ef6d657705600000000001219c8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f642000 RCX=0000000000000000 RDX=ffff888014669b40 RSI=ffffffff83c101bc RDI=ffff888014667000 RBP=ffff888014667000 RSP=ffff88801ca17d40 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff88800f642000 R11=0000000000000001 R12=ffff888014667650 R13=ffff88800f642650 R14=000000000000006e R15=ffff88800f642060 RIP=ffffffff814c0864 RFL=00000206 [-----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 00007f2de4ef8900 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=00007f2de54ad650 CR3=000000000ef18000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000