syzkaller login: [ 36.166862] BUG: Bad rss-counter state mm:00000000a04f532d type:MM_FILEPAGES val:33 [ 36.167665] BUG: Bad rss-counter state mm:00000000a04f532d type:MM_ANONPAGES val:22 [ 36.196117] ================================================================== [ 36.196802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.197436] Read of size 8 at addr ffff888013e3c5c8 by task sshd/220 [ 36.197942] [ 36.198087] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.198652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.199305] Call Trace: [ 36.199584] [ 36.199775] dump_stack_lvl+0x91/0xf0 [ 36.200269] print_report+0xcc/0x620 [ 36.200587] ? __virt_addr_valid+0x102/0x340 [ 36.200953] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.201359] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.201792] kasan_report+0xbe/0xf0 [ 36.202131] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.202561] vma_interval_tree_remove+0xc75/0xec0 [ 36.202975] vma_prepare+0xc54/0x11a0 [ 36.203288] __split_vma+0x5af/0x950 [ 36.203625] ? __pfx___split_vma+0x10/0x10 [ 36.204028] ? find_held_lock+0x2c/0x110 [ 36.204382] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.204770] ? lock_is_held_type+0x9f/0x120 [ 36.205155] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.205620] ? mtree_range_walk+0x632/0x900 [ 36.205999] ? mas_walk+0x5c7/0x7c0 [ 36.206317] do_vmi_munmap+0x1f1/0x2b0 [ 36.206653] mmap_region+0x1f9/0x2660 [ 36.206993] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.207361] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.207921] ? __pfx_lock_acquire+0x10/0x10 [ 36.208270] ? __pfx_mmap_region+0x10/0x10 [ 36.208619] ? security_mmap_addr+0x7d/0xa0 [ 36.209009] ? get_unmapped_area+0x1f5/0x3f0 [ 36.209373] do_mmap+0x854/0xf00 [ 36.209674] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.210021] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.210390] ksys_mmap_pgoff+0x3af/0x500 [ 36.210718] do_syscall_64+0x3f/0x90 [ 36.211060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.211504] RIP: 0033:0x7f83a2ab5d82 [ 36.211841] 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 [ 36.213284] RSP: 002b:00007ffc3183e0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.213876] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83a2ab5d82 [ 36.214426] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83a1eef000 [ 36.215026] RBP: 00007f83a1eef000 R08: 0000000000000009 R09: 0000000000001000 [ 36.215637] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d68e285ec0 [ 36.216249] R13: 00007ffc3183e0e0 R14: 00007ffc3183e110 R15: 00007ffc3183e470 [ 36.216818] [ 36.217009] [ 36.217149] Allocated by task 213: [ 36.217426] kasan_save_stack+0x22/0x50 [ 36.217762] kasan_set_track+0x25/0x30 [ 36.218076] __kasan_slab_alloc+0x59/0x70 [ 36.218421] kmem_cache_alloc+0x16b/0x370 [ 36.218784] vm_area_dup+0x20/0x160 [ 36.219104] __split_vma+0x170/0x950 [ 36.219411] split_vma+0xc6/0x110 [ 36.219725] mprotect_fixup+0x8d2/0xb30 [ 36.220067] do_mprotect_pkey+0x87e/0xd40 [ 36.220435] __x64_sys_mprotect+0x78/0xc0 [ 36.220779] do_syscall_64+0x3f/0x90 [ 36.221081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.221503] [ 36.221649] Freed by task 213: [ 36.221904] kasan_save_stack+0x22/0x50 [ 36.222232] kasan_set_track+0x25/0x30 [ 36.222547] kasan_save_free_info+0x2b/0x50 [ 36.222888] __kasan_slab_free+0x10a/0x190 [ 36.223214] kmem_cache_free+0x10d/0x4d0 [ 36.223581] rcu_core+0x8c8/0x2860 [ 36.223871] __do_softirq+0x1b7/0x7d4 [ 36.224182] [ 36.224321] Last potentially related work creation: [ 36.224701] kasan_save_stack+0x22/0x50 [ 36.225039] __kasan_record_aux_stack+0x8e/0xa0 [ 36.225432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.225906] remove_vma+0x139/0x170 [ 36.226199] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.226552] do_vmi_munmap+0x1f1/0x2b0 [ 36.226875] __vm_munmap+0x138/0x3a0 [ 36.227217] __x64_sys_munmap+0x59/0x80 [ 36.227571] do_syscall_64+0x3f/0x90 [ 36.227874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.228281] [ 36.228420] The buggy address belongs to the object at ffff888013e3c570 [ 36.228420] which belongs to the cache vm_area_struct of size 168 [ 36.229375] The buggy address is located 88 bytes inside of [ 36.229375] freed 168-byte region [ffff888013e3c570, ffff888013e3c618) [ 36.230346] [ 36.230482] The buggy address belongs to the physical page: [ 36.230907] page:0000000014132841 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13e3c [ 36.231702] memcg:ffff88800dcdae01 [ 36.231985] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.232411] page_type: 0xffffffff() [ 36.232713] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.233312] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcdae01 [ 36.233906] page dumped because: kasan: bad access detected [ 36.234330] [ 36.234469] Memory state around the buggy address: [ 36.234839] ffff888013e3c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.235404] ffff888013e3c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 36.235994] >ffff888013e3c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.236531] ^ [ 36.236969] ffff888013e3c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.237561] ffff888013e3c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.238163] ================================================================== [ 36.238917] Disabling lock debugging due to kernel taint [ 37.679124] BUG: Bad rss-counter state mm:00000000e976cee6 type:MM_FILEPAGES val:33 [ 37.680203] BUG: Bad rss-counter state mm:00000000e976cee6 type:MM_ANONPAGES val:22 [ 38.049904] BUG: Bad rss-counter state mm:00000000a6527f3b type:MM_FILEPAGES val:33 [ 38.050930] BUG: Bad rss-counter state mm:00000000a6527f3b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2951' (ECDSA) to the list of known hosts. 2023/06/20 09:48:30 fuzzer started 2023/06/20 09:48:30 dialing manager at localhost:44161 2023/06/20 09:48:30 checking machine... 2023/06/20 09:48:30 checking revisions... [ 38.629355] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:48:30 testing simple program... [ 38.677062] cgroup: Unknown subsys name 'net' [ 38.708376] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:48:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=000056357e794fe0 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=00007f53baf345100000561207781790 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=0000000000000000 RBX=ffff88801592f3a8 RCX=ffffffff860ee3fe RDX=1ffff11002b25e75 RSI=ffff88801592fb10 RDI=ffff88801592f3a8 RBP=ffff88801592fb10 RSP=ffff88801592f300 R8 =ffffffff860ee402 R9 =ffff88801592f3e8 R10=0000000000038001 R11=0000000000014ab3 R12=0000000000000008 R13=ffff88801592f3f0 R14=ffff88801592fb18 R15=ffff88801592f3a8 RIP=ffffffff8113041a RFL=00000286 [--S--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 00007f0aada83900 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=00007ffcdbcf3000 CR3=000000000fe0a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000