syzkaller login: [ 35.419083] BUG: Bad rss-counter state mm:00000000601be2df type:MM_FILEPAGES val:33 [ 35.420272] BUG: Bad rss-counter state mm:00000000601be2df type:MM_ANONPAGES val:22 [ 35.482866] ================================================================== [ 35.483867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.484933] Read of size 8 at addr ffff888018d25880 by task sshd/221 [ 35.486042] [ 35.486281] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.487242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.488364] Call Trace: [ 35.488734] [ 35.489058] dump_stack_lvl+0x91/0xf0 [ 35.489621] print_report+0xcc/0x620 [ 35.490167] ? __virt_addr_valid+0x102/0x340 [ 35.490798] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.491495] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.492184] kasan_report+0xbe/0xf0 [ 35.492744] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.493440] vma_interval_tree_remove+0xc75/0xec0 [ 35.494111] vma_prepare+0xc54/0x11a0 [ 35.494651] __split_vma+0x5af/0x950 [ 35.495177] ? __pfx___split_vma+0x10/0x10 [ 35.495762] ? find_held_lock+0x2c/0x110 [ 35.496336] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.496972] ? lock_is_held_type+0x9f/0x120 [ 35.497563] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.498228] ? mtree_range_walk+0x632/0x900 [ 35.498840] ? mas_walk+0x5c7/0x7c0 [ 35.499360] do_vmi_munmap+0x1f1/0x2b0 [ 35.499910] mmap_region+0x1f9/0x2660 [ 35.500443] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.501011] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.501798] ? __pfx_lock_acquire+0x10/0x10 [ 35.502387] ? __pfx_mmap_region+0x10/0x10 [ 35.502972] ? security_mmap_addr+0x7d/0xa0 [ 35.503559] ? get_unmapped_area+0x1f5/0x3f0 [ 35.504166] do_mmap+0x854/0xf00 [ 35.504657] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.505207] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.505834] ksys_mmap_pgoff+0x3af/0x500 [ 35.506393] do_syscall_64+0x3f/0x90 [ 35.506930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.507647] RIP: 0033:0x7f44501d4d82 [ 35.508149] 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 [ 35.510505] RSP: 002b:00007ffe61a09748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.511486] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f44501d4d82 [ 35.512413] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f444f60e000 [ 35.513341] RBP: 00007f444f60e000 R08: 0000000000000009 R09: 0000000000001000 [ 35.514254] R10: 0000000000000812 R11: 0000000000000206 R12: 000055feb8e49ec0 [ 35.515176] R13: 00007ffe61a09760 R14: 00007ffe61a09790 R15: 00007ffe61a09af0 [ 35.516109] [ 35.516429] [ 35.516680] Allocated by task 214: [ 35.517155] kasan_save_stack+0x22/0x50 [ 35.517708] kasan_set_track+0x25/0x30 [ 35.518248] __kasan_slab_alloc+0x59/0x70 [ 35.518821] kmem_cache_alloc+0x16b/0x370 [ 35.519382] vm_area_dup+0x20/0x160 [ 35.519876] __split_vma+0x170/0x950 [ 35.520386] split_vma+0xc6/0x110 [ 35.520882] mprotect_fixup+0x8d2/0xb30 [ 35.521450] do_mprotect_pkey+0x87e/0xd40 [ 35.522040] __x64_sys_mprotect+0x78/0xc0 [ 35.522625] do_syscall_64+0x3f/0x90 [ 35.523157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.523875] [ 35.524120] Freed by task 214: [ 35.524561] kasan_save_stack+0x22/0x50 [ 35.525133] kasan_set_track+0x25/0x30 [ 35.525688] kasan_save_free_info+0x2b/0x50 [ 35.526290] __kasan_slab_free+0x10a/0x190 [ 35.526889] kmem_cache_free+0x10d/0x4d0 [ 35.527459] rcu_core+0x8c8/0x2860 [ 35.527963] __do_softirq+0x1b7/0x7d4 [ 35.528496] [ 35.528766] Last potentially related work creation: [ 35.529460] kasan_save_stack+0x22/0x50 [ 35.530042] __kasan_record_aux_stack+0x8e/0xa0 [ 35.530711] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.531459] remove_vma+0x139/0x170 [ 35.531990] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.532644] do_vmi_munmap+0x1f1/0x2b0 [ 35.533211] __vm_munmap+0x138/0x3a0 [ 35.533758] __x64_sys_munmap+0x59/0x80 [ 35.534335] do_syscall_64+0x3f/0x90 [ 35.534895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.535643] [ 35.535899] The buggy address belongs to the object at ffff888018d25828 [ 35.535899] which belongs to the cache vm_area_struct of size 168 [ 35.537639] The buggy address is located 88 bytes inside of [ 35.537639] freed 168-byte region [ffff888018d25828, ffff888018d258d0) [ 35.539272] [ 35.539521] The buggy address belongs to the physical page: [ 35.540289] page:00000000c18fcb84 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d25 [ 35.541582] memcg:ffff88801652b501 [ 35.542073] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.542823] page_type: 0xffffffff() [ 35.543356] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.544442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801652b501 [ 35.545515] page dumped because: kasan: bad access detected [ 35.546284] [ 35.546548] Memory state around the buggy address: [ 35.547223] ffff888018d25780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.548211] ffff888018d25800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.549212] >ffff888018d25880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.550161] ^ [ 35.550625] ffff888018d25900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.551587] ffff888018d25980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.552533] ================================================================== [ 35.553822] Disabling lock debugging due to kernel taint [ 37.550537] BUG: Bad rss-counter state mm:0000000091c37510 type:MM_FILEPAGES val:33 [ 37.551780] BUG: Bad rss-counter state mm:0000000091c37510 type:MM_ANONPAGES val:22 [ 38.010769] BUG: Bad rss-counter state mm:000000005a1bd84f type:MM_FILEPAGES val:33 [ 38.011689] BUG: Bad rss-counter state mm:000000005a1bd84f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64503' (ECDSA) to the list of known hosts. 2023/06/19 13:33:56 fuzzer started 2023/06/19 13:33:57 dialing manager at localhost:44161 2023/06/19 13:33:57 checking machine... 2023/06/19 13:33:57 checking revisions... [ 38.701812] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:33:57 testing simple program... [ 38.747333] cgroup: Unknown subsys name 'net' [ 38.818978] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:33:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888017c5f5e8 RCX=ffffffff8613751a RDX=1ffff11002f8bebd RSI=ffff888017c5f930 RDI=ffff888017c5f5e8 RBP=ffff888017c5f930 RSP=ffff888017c5f540 R8 =ffffffff8613751e R9 =ffff888017c5f628 R10=0000000000038001 R11=0000000000020d8a R12=0000000000000008 R13=ffff888017c5f630 R14=ffff888017c5f938 R15=ffff888017c5f5e8 RIP=ffffffff8113041a RFL=00000282 [--S----] 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 00007fc0057ed900 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=00007fc005da50b0 CR3=000000000f602000 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=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 info registers vcpu 1 RAX=ffffffff84601450 RBX=ffffffff860546c8 RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864baff8 RDI=ffffffff8605469c RBP=ffffffff860546bc RSP=ffff88806cf099e0 R8 =ffffffff864baff8 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffffffff860546d8 R13=ffffffff8605469c R14=ffffffff860546b8 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000287 [--S--PC] 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 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=0000557789208040 CR3=0000000005482000 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=00007f8b1f6fb510000055c439bb0790 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