syzkaller login: [ 31.513923] BUG: Bad rss-counter state mm:000000006ca4c12c type:MM_FILEPAGES val:33 [ 31.515164] BUG: Bad rss-counter state mm:000000006ca4c12c type:MM_ANONPAGES val:22 [ 31.688692] ================================================================== [ 31.689599] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.690564] Read of size 8 at addr ffff88800e513058 by task sshd/221 [ 31.691329] [ 31.691550] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.692409] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.693416] Call Trace: [ 31.693757] [ 31.694042] dump_stack_lvl+0x91/0xf0 [ 31.694567] print_report+0xcc/0x620 [ 31.695069] ? __virt_addr_valid+0x102/0x340 [ 31.695634] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.696261] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.696894] kasan_report+0xbe/0xf0 [ 31.697373] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.697998] vma_interval_tree_remove+0xc75/0xec0 [ 31.698622] vma_prepare+0xc54/0x11a0 [ 31.699108] __split_vma+0x5af/0x950 [ 31.699583] ? __pfx___split_vma+0x10/0x10 [ 31.700128] ? find_held_lock+0x2c/0x110 [ 31.700649] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.701221] ? lock_is_held_type+0x9f/0x120 [ 31.701766] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.702372] ? mtree_range_walk+0x632/0x900 [ 31.702948] ? mas_walk+0x5c7/0x7c0 [ 31.703429] do_vmi_munmap+0x1f1/0x2b0 [ 31.703926] mmap_region+0x1f9/0x2660 [ 31.704412] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.704930] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.705659] ? __pfx_lock_acquire+0x10/0x10 [ 31.706222] ? __pfx_mmap_region+0x10/0x10 [ 31.706760] ? security_mmap_addr+0x7d/0xa0 [ 31.707292] ? get_unmapped_area+0x1f5/0x3f0 [ 31.707852] do_mmap+0x854/0xf00 [ 31.708296] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.708809] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.709374] ksys_mmap_pgoff+0x3af/0x500 [ 31.709883] do_syscall_64+0x3f/0x90 [ 31.710364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.711034] RIP: 0033:0x7eff48fafd82 [ 31.711487] 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 [ 31.713836] RSP: 002b:00007ffd68bf9048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.714768] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff48fafd82 [ 31.715629] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff483e9000 [ 31.716504] RBP: 00007eff483e9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.717366] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558457c23ec0 [ 31.718227] R13: 00007ffd68bf9060 R14: 00007ffd68bf9090 R15: 00007ffd68bf93f0 [ 31.719109] [ 31.719399] [ 31.719613] Allocated by task 214: [ 31.720048] kasan_save_stack+0x22/0x50 [ 31.720552] kasan_set_track+0x25/0x30 [ 31.721050] __kasan_slab_alloc+0x59/0x70 [ 31.721574] kmem_cache_alloc+0x16b/0x370 [ 31.722104] vm_area_dup+0x20/0x160 [ 31.722569] __split_vma+0x170/0x950 [ 31.723046] split_vma+0xc6/0x110 [ 31.723488] mprotect_fixup+0x8d2/0xb30 [ 31.724001] do_mprotect_pkey+0x87e/0xd40 [ 31.724520] __x64_sys_mprotect+0x78/0xc0 [ 31.725040] do_syscall_64+0x3f/0x90 [ 31.725514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.726154] [ 31.726371] Freed by task 214: [ 31.726771] kasan_save_stack+0x22/0x50 [ 31.727274] kasan_set_track+0x25/0x30 [ 31.727768] kasan_save_free_info+0x2b/0x50 [ 31.728297] __kasan_slab_free+0x10a/0x190 [ 31.728833] kmem_cache_free+0x10d/0x4d0 [ 31.729344] rcu_core+0x8c8/0x2860 [ 31.729800] __do_softirq+0x1b7/0x7d4 [ 31.730276] [ 31.730504] Last potentially related work creation: [ 31.731104] kasan_save_stack+0x22/0x50 [ 31.731607] __kasan_record_aux_stack+0x8e/0xa0 [ 31.732186] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.732845] remove_vma+0x139/0x170 [ 31.733295] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.733860] do_vmi_munmap+0x1f1/0x2b0 [ 31.734347] __vm_munmap+0x138/0x3a0 [ 31.734834] __x64_sys_munmap+0x59/0x80 [ 31.735328] do_syscall_64+0x3f/0x90 [ 31.735810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.736458] [ 31.736680] The buggy address belongs to the object at ffff88800e513000 [ 31.736680] which belongs to the cache vm_area_struct of size 168 [ 31.738151] The buggy address is located 88 bytes inside of [ 31.738151] freed 168-byte region [ffff88800e513000, ffff88800e5130a8) [ 31.739581] [ 31.739799] The buggy address belongs to the physical page: [ 31.740464] page:00000000a948a6fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe513 [ 31.741549] memcg:ffff88800e576101 [ 31.741972] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.742641] page_type: 0xffffffff() [ 31.743099] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.744023] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e576101 [ 31.744935] page dumped because: kasan: bad access detected [ 31.745594] [ 31.745811] Memory state around the buggy address: [ 31.746395] ffff88800e512f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.747273] ffff88800e512f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.748141] >ffff88800e513000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.749002] ^ [ 31.749743] ffff88800e513080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.750664] ffff88800e513100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.751534] ================================================================== [ 31.752549] Disabling lock debugging due to kernel taint [ 33.396408] BUG: Bad rss-counter state mm:00000000a7b142fd type:MM_FILEPAGES val:33 [ 33.397427] BUG: Bad rss-counter state mm:00000000a7b142fd type:MM_ANONPAGES val:22 [ 33.889638] BUG: Bad rss-counter state mm:0000000089a0517a type:MM_FILEPAGES val:33 [ 33.890660] BUG: Bad rss-counter state mm:0000000089a0517a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14074' (ECDSA) to the list of known hosts. 2023/06/20 13:18:32 fuzzer started 2023/06/20 13:18:33 dialing manager at localhost:36067 2023/06/20 13:18:33 checking machine... 2023/06/20 13:18:33 checking revisions... [ 34.586124] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:18:33 testing simple program... [ 34.644048] cgroup: Unknown subsys name 'net' [ 34.690052] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:18:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc7c6afa78 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f54f12b55100000563cf34a4790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110012c9743 RBX=ffff88800964b9e8 RCX=1ffff11001ae8544 RDX=dffffc0000000000 RSI=ffff888019afbd20 RDI=ffff88800964ba18 RBP=ffff88800d7429f0 RSP=ffff8880146675f8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888019afbbe8 R13=0000000000000000 R14=ffff88800d617048 R15=ffff88800d617000 RIP=ffffffff8184767e 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 00007f359e0ba900 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=00007f15cb6a1650 CR3=000000000c69a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=85a4441c48b4217400000000000ae988 XMM05=504736a27a6588b50000000000133340 XMM06=c291bd5c70af25b90000000000132130 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000