syzkaller login: [ 30.576082] BUG: Bad rss-counter state mm:00000000225d2068 type:MM_FILEPAGES val:33 [ 30.577052] BUG: Bad rss-counter state mm:00000000225d2068 type:MM_ANONPAGES val:22 [ 30.741419] ================================================================== [ 30.742420] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.743438] Read of size 8 at addr ffff88801a3ad3f8 by task sshd/221 [ 30.744258] [ 30.744499] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.745595] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.746689] Call Trace: [ 30.747040] [ 30.747343] dump_stack_lvl+0x91/0xf0 [ 30.747876] print_report+0xcc/0x620 [ 30.748384] ? __virt_addr_valid+0x102/0x340 [ 30.748978] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749625] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750294] kasan_report+0xbe/0xf0 [ 30.750803] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.751462] vma_interval_tree_remove+0xc75/0xec0 [ 30.752114] vma_prepare+0xc54/0x11a0 [ 30.752628] __split_vma+0x5af/0x950 [ 30.753124] ? __pfx___split_vma+0x10/0x10 [ 30.753695] ? find_held_lock+0x2c/0x110 [ 30.754260] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.754865] ? lock_is_held_type+0x9f/0x120 [ 30.755441] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.756091] ? mtree_range_walk+0x632/0x900 [ 30.756678] ? mas_walk+0x5c7/0x7c0 [ 30.757188] do_vmi_munmap+0x1f1/0x2b0 [ 30.757704] mmap_region+0x1f9/0x2660 [ 30.758229] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.758779] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.759552] ? __pfx_lock_acquire+0x10/0x10 [ 30.760129] ? __pfx_mmap_region+0x10/0x10 [ 30.760698] ? security_mmap_addr+0x7d/0xa0 [ 30.761268] ? get_unmapped_area+0x1f5/0x3f0 [ 30.761863] do_mmap+0x854/0xf00 [ 30.762326] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.762854] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.763439] ksys_mmap_pgoff+0x3af/0x500 [ 30.763984] do_syscall_64+0x3f/0x90 [ 30.764499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765196] RIP: 0033:0x7f3a2825ad82 [ 30.765686] 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 [ 30.768002] RSP: 002b:00007fffc4f072e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.768975] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a2825ad82 [ 30.769888] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a27694000 [ 30.770811] RBP: 00007f3a27694000 R08: 0000000000000009 R09: 0000000000001000 [ 30.771720] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f53df9fec0 [ 30.772629] R13: 00007fffc4f07300 R14: 00007fffc4f07330 R15: 00007fffc4f07690 [ 30.773552] [ 30.773889] [ 30.774109] Allocated by task 214: [ 30.774574] kasan_save_stack+0x22/0x50 [ 30.775108] kasan_set_track+0x25/0x30 [ 30.775636] __kasan_slab_alloc+0x59/0x70 [ 30.776197] kmem_cache_alloc+0x16b/0x370 [ 30.776746] vm_area_dup+0x20/0x160 [ 30.777227] __split_vma+0x170/0x950 [ 30.777725] split_vma+0xc6/0x110 [ 30.778207] mprotect_fixup+0x8d2/0xb30 [ 30.778747] do_mprotect_pkey+0x87e/0xd40 [ 30.779315] __x64_sys_mprotect+0x78/0xc0 [ 30.779869] do_syscall_64+0x3f/0x90 [ 30.780364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.781032] [ 30.781249] Freed by task 19: [ 30.781653] kasan_save_stack+0x22/0x50 [ 30.782192] kasan_set_track+0x25/0x30 [ 30.782707] kasan_save_free_info+0x2b/0x50 [ 30.783280] __kasan_slab_free+0x10a/0x190 [ 30.783836] kmem_cache_free+0x10d/0x4d0 [ 30.784367] rcu_core+0x8c8/0x2860 [ 30.784826] __do_softirq+0x1b7/0x7d4 [ 30.785319] [ 30.785544] Last potentially related work creation: [ 30.786173] kasan_save_stack+0x22/0x50 [ 30.786769] __kasan_record_aux_stack+0x8e/0xa0 [ 30.787370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.788047] remove_vma+0x139/0x170 [ 30.788527] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.789118] do_vmi_munmap+0x1f1/0x2b0 [ 30.789619] __vm_munmap+0x138/0x3a0 [ 30.790134] __x64_sys_munmap+0x59/0x80 [ 30.790653] do_syscall_64+0x3f/0x90 [ 30.791148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.791834] [ 30.792051] The buggy address belongs to the object at ffff88801a3ad3a0 [ 30.792051] which belongs to the cache vm_area_struct of size 168 [ 30.793613] The buggy address is located 88 bytes inside of [ 30.793613] freed 168-byte region [ffff88801a3ad3a0, ffff88801a3ad448) [ 30.795180] [ 30.795404] The buggy address belongs to the physical page: [ 30.796105] page:00000000c325b039 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3ad [ 30.797272] memcg:ffff88800e814f01 [ 30.797729] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.798435] page_type: 0xffffffff() [ 30.798901] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.799899] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e814f01 [ 30.800877] page dumped because: kasan: bad access detected [ 30.801570] [ 30.801806] Memory state around the buggy address: [ 30.802413] ffff88801a3ad280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.803297] ffff88801a3ad300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.804160] >ffff88801a3ad380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.805023] ^ [ 30.805891] ffff88801a3ad400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.806762] ffff88801a3ad480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.807615] ================================================================== [ 30.808751] Disabling lock debugging due to kernel taint [ 32.775948] BUG: Bad rss-counter state mm:000000008c344db3 type:MM_FILEPAGES val:33 [ 32.777123] BUG: Bad rss-counter state mm:000000008c344db3 type:MM_ANONPAGES val:22 [ 33.350458] BUG: Bad rss-counter state mm:000000008ffcb502 type:MM_FILEPAGES val:33 [ 33.351647] BUG: Bad rss-counter state mm:000000008ffcb502 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38950' (ECDSA) to the list of known hosts. 2023/06/21 01:10:37 fuzzer started 2023/06/21 01:10:37 dialing manager at localhost:36067 2023/06/21 01:10:37 checking machine... 2023/06/21 01:10:37 checking revisions... [ 34.012304] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:10:37 testing simple program... [ 34.061157] cgroup: Unknown subsys name 'net' [ 34.102286] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:10:37 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=00007ffc40633fc8 CR3=000000001823c000 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=2037333a30313a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a30313a3130203132 XMM08=3d64696720303d64697520612f6e3d64 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f3a96f1c120 CR3=000000000d6d2000 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=4781776f7f42fbbc60456fa763691250 XMM02=000000000011a7c0ec2efd57dc4c00df XMM03=00000000001220888256be5d047d9b9b XMM04=a0068d459296567700000000000ae988 XMM05=0156d10d2f2c78480000000000132938 XMM06=c291bd5c70af25b90000000000131d60 XMM07=e042d86d42eb936e0000000000122308 XMM08=8256be5d047d9b9b000000000011a820 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000