syzkaller login: [ 28.748762] BUG: Bad rss-counter state mm:000000002619969d type:MM_FILEPAGES val:33 [ 28.750019] BUG: Bad rss-counter state mm:000000002619969d type:MM_ANONPAGES val:22 [ 28.897083] ================================================================== [ 28.897990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.898938] Read of size 8 at addr ffff888015a81310 by task sshd/221 [ 28.899707] [ 28.899922] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.900930] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.901910] Call Trace: [ 28.902230] [ 28.902515] dump_stack_lvl+0x91/0xf0 [ 28.903033] print_report+0xcc/0x620 [ 28.903518] ? __virt_addr_valid+0x102/0x340 [ 28.904079] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.904701] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.905349] kasan_report+0xbe/0xf0 [ 28.905840] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.906469] vma_interval_tree_remove+0xc75/0xec0 [ 28.907078] vma_prepare+0xc54/0x11a0 [ 28.907563] __split_vma+0x5af/0x950 [ 28.908040] ? __pfx___split_vma+0x10/0x10 [ 28.908577] ? find_held_lock+0x2c/0x110 [ 28.909108] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.909686] ? lock_is_held_type+0x9f/0x120 [ 28.910246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.910857] ? mtree_range_walk+0x632/0x900 [ 28.911418] ? mas_walk+0x5c7/0x7c0 [ 28.911906] do_vmi_munmap+0x1f1/0x2b0 [ 28.912406] mmap_region+0x1f9/0x2660 [ 28.912902] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.913425] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.914149] ? __pfx_lock_acquire+0x10/0x10 [ 28.914687] ? __pfx_mmap_region+0x10/0x10 [ 28.915221] ? security_mmap_addr+0x7d/0xa0 [ 28.915752] ? get_unmapped_area+0x1f5/0x3f0 [ 28.916311] do_mmap+0x854/0xf00 [ 28.916752] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.917264] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.917839] ksys_mmap_pgoff+0x3af/0x500 [ 28.918353] do_syscall_64+0x3f/0x90 [ 28.918843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.919501] RIP: 0033:0x7f6359784d82 [ 28.919965] 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 [ 28.922153] RSP: 002b:00007fffa53e8488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.923069] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6359784d82 [ 28.923921] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6358bbe000 [ 28.924778] RBP: 00007f6358bbe000 R08: 0000000000000009 R09: 0000000000001000 [ 28.925646] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b21f107ec0 [ 28.926487] R13: 00007fffa53e84a0 R14: 00007fffa53e84d0 R15: 00007fffa53e8830 [ 28.927351] [ 28.927643] [ 28.927860] Allocated by task 213: [ 28.928290] kasan_save_stack+0x22/0x50 [ 28.928796] kasan_set_track+0x25/0x30 [ 28.929306] __kasan_slab_alloc+0x59/0x70 [ 28.929839] kmem_cache_alloc+0x16b/0x370 [ 28.930360] vm_area_dup+0x20/0x160 [ 28.930816] __split_vma+0x170/0x950 [ 28.931284] split_vma+0xc6/0x110 [ 28.931725] mprotect_fixup+0x8d2/0xb30 [ 28.932233] do_mprotect_pkey+0x87e/0xd40 [ 28.932758] __x64_sys_mprotect+0x78/0xc0 [ 28.933286] do_syscall_64+0x3f/0x90 [ 28.933765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.934419] [ 28.934640] Freed by task 213: [ 28.935032] kasan_save_stack+0x22/0x50 [ 28.935535] kasan_set_track+0x25/0x30 [ 28.936035] kasan_save_free_info+0x2b/0x50 [ 28.936568] __kasan_slab_free+0x10a/0x190 [ 28.937128] kmem_cache_free+0x10d/0x4d0 [ 28.937642] rcu_core+0x8c8/0x2860 [ 28.938093] __do_softirq+0x1b7/0x7d4 [ 28.938578] [ 28.938795] Last potentially related work creation: [ 28.939382] kasan_save_stack+0x22/0x50 [ 28.939894] __kasan_record_aux_stack+0x8e/0xa0 [ 28.940478] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.941140] remove_vma+0x139/0x170 [ 28.941599] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.942162] do_vmi_munmap+0x1f1/0x2b0 [ 28.942650] __vm_munmap+0x138/0x3a0 [ 28.943121] __x64_sys_munmap+0x59/0x80 [ 28.943626] do_syscall_64+0x3f/0x90 [ 28.944109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.944765] [ 28.944991] The buggy address belongs to the object at ffff888015a812b8 [ 28.944991] which belongs to the cache vm_area_struct of size 168 [ 28.946465] The buggy address is located 88 bytes inside of [ 28.946465] freed 168-byte region [ffff888015a812b8, ffff888015a81360) [ 28.947885] [ 28.948102] The buggy address belongs to the physical page: [ 28.948773] page:00000000d080f8c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a81 [ 28.949900] memcg:ffff888015a82001 [ 28.950328] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.951030] page_type: 0xffffffff() [ 28.951485] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c6080 dead000000000003 [ 28.952416] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a82001 [ 28.953348] page dumped because: kasan: bad access detected [ 28.954014] [ 28.954233] Memory state around the buggy address: [ 28.954815] ffff888015a81200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.955677] ffff888015a81280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.956531] >ffff888015a81300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.957412] ^ [ 28.957882] ffff888015a81380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.958736] ffff888015a81400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 28.959587] ================================================================== [ 28.960583] Disabling lock debugging due to kernel taint [ 31.612536] BUG: Bad rss-counter state mm:0000000069a5d092 type:MM_FILEPAGES val:33 [ 31.613515] BUG: Bad rss-counter state mm:0000000069a5d092 type:MM_ANONPAGES val:22 [ 32.094781] BUG: Bad rss-counter state mm:00000000f32f83c3 type:MM_FILEPAGES val:33 [ 32.095797] BUG: Bad rss-counter state mm:00000000f32f83c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31793' (ECDSA) to the list of known hosts. 2023/06/20 17:42:26 fuzzer started 2023/06/20 17:42:27 dialing manager at localhost:36067 2023/06/20 17:42:27 checking machine... 2023/06/20 17:42:27 checking revisions... [ 32.772384] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:42:27 testing simple program... [ 32.822220] cgroup: Unknown subsys name 'net' [ 32.884864] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:42:26 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=000055ab081e1050 CR3=000000000ebf0000 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=2036323a32343a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a32343a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff815a65b5 RDI=ffffffff852bf9a0 RBP=ffff88801427fd28 RSP=ffff88801427fc58 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=00000000000000ac R13=ffff88801427fd28 R14=00000000000000ac R15=ffffc9000063c050 RIP=ffffffff814c0871 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 00007f95bedbc900 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=00007f0a52b18650 CR3=000000000c640000 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=6d8ad5944bad327200000000000ae988 XMM05=a3bf02d19fe7f2d50000000000132970 XMM06=1821810245b9f85b0000000000131710 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000