syzkaller login: [ 30.628883] BUG: Bad rss-counter state mm:00000000a37ca1b7 type:MM_FILEPAGES val:33 [ 30.629887] BUG: Bad rss-counter state mm:00000000a37ca1b7 type:MM_ANONPAGES val:22 [ 30.789184] ================================================================== [ 30.790123] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.791051] Read of size 8 at addr ffff888016b18228 by task sshd/220 [ 30.791809] [ 30.792024] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.793096] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.794083] Call Trace: [ 30.794402] [ 30.794690] dump_stack_lvl+0x91/0xf0 [ 30.795210] print_report+0xcc/0x620 [ 30.795697] ? __virt_addr_valid+0x102/0x340 [ 30.796238] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.796850] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.797462] kasan_report+0xbe/0xf0 [ 30.797934] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.798573] vma_interval_tree_remove+0xc75/0xec0 [ 30.799183] vma_prepare+0xc54/0x11a0 [ 30.799658] __split_vma+0x5af/0x950 [ 30.800128] ? __pfx___split_vma+0x10/0x10 [ 30.800663] ? find_held_lock+0x2c/0x110 [ 30.801188] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.801753] ? lock_is_held_type+0x9f/0x120 [ 30.802310] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.802920] ? mtree_range_walk+0x632/0x900 [ 30.803471] ? mas_walk+0x5c7/0x7c0 [ 30.803946] do_vmi_munmap+0x1f1/0x2b0 [ 30.804441] mmap_region+0x1f9/0x2660 [ 30.804918] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.805422] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.806132] ? __pfx_lock_acquire+0x10/0x10 [ 30.806660] ? __pfx_mmap_region+0x10/0x10 [ 30.807191] ? security_mmap_addr+0x7d/0xa0 [ 30.807723] ? get_unmapped_area+0x1f5/0x3f0 [ 30.808267] do_mmap+0x854/0xf00 [ 30.808707] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.809194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.809751] ksys_mmap_pgoff+0x3af/0x500 [ 30.810273] do_syscall_64+0x3f/0x90 [ 30.810751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.811407] RIP: 0033:0x7f1929fe1d82 [ 30.811867] 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 [ 30.813981] RSP: 002b:00007ffea761d1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.814889] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1929fe1d82 [ 30.815744] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f192941b000 [ 30.816585] RBP: 00007f192941b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.817424] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564bb62aeec0 [ 30.818283] R13: 00007ffea761d1c0 R14: 00007ffea761d1f0 R15: 00007ffea761d550 [ 30.819132] [ 30.819421] [ 30.819637] Allocated by task 213: [ 30.820062] kasan_save_stack+0x22/0x50 [ 30.820563] kasan_set_track+0x25/0x30 [ 30.821054] __kasan_slab_alloc+0x59/0x70 [ 30.821575] kmem_cache_alloc+0x16b/0x370 [ 30.822094] vm_area_dup+0x20/0x160 [ 30.822546] __split_vma+0x170/0x950 [ 30.823011] split_vma+0xc6/0x110 [ 30.823444] mprotect_fixup+0x8d2/0xb30 [ 30.823943] do_mprotect_pkey+0x87e/0xd40 [ 30.824461] __x64_sys_mprotect+0x78/0xc0 [ 30.824980] do_syscall_64+0x3f/0x90 [ 30.825461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.826116] [ 30.826331] Freed by task 213: [ 30.826719] kasan_save_stack+0x22/0x50 [ 30.827218] kasan_set_track+0x25/0x30 [ 30.827705] kasan_save_free_info+0x2b/0x50 [ 30.828235] __kasan_slab_free+0x10a/0x190 [ 30.828771] kmem_cache_free+0x10d/0x4d0 [ 30.829271] rcu_core+0x8c8/0x2860 [ 30.829714] __do_softirq+0x1b7/0x7d4 [ 30.830213] [ 30.830429] Last potentially related work creation: [ 30.831009] kasan_save_stack+0x22/0x50 [ 30.831510] __kasan_record_aux_stack+0x8e/0xa0 [ 30.832091] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.832732] remove_vma+0x139/0x170 [ 30.833193] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.833746] do_vmi_munmap+0x1f1/0x2b0 [ 30.834331] __vm_munmap+0x138/0x3a0 [ 30.834797] __x64_sys_munmap+0x59/0x80 [ 30.835290] do_syscall_64+0x3f/0x90 [ 30.835769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.836413] [ 30.836627] The buggy address belongs to the object at ffff888016b181d0 [ 30.836627] which belongs to the cache vm_area_struct of size 168 [ 30.838104] The buggy address is located 88 bytes inside of [ 30.838104] freed 168-byte region [ffff888016b181d0, ffff888016b18278) [ 30.839489] [ 30.839705] The buggy address belongs to the physical page: [ 30.840366] page:000000001344f8eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b18 [ 30.841456] memcg:ffff88800cab6001 [ 30.841880] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.842532] page_type: 0xffffffff() [ 30.842984] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.843894] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cab6001 [ 30.844797] page dumped because: kasan: bad access detected [ 30.845450] [ 30.845666] Memory state around the buggy address: [ 30.846249] ffff888016b18100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.847097] ffff888016b18180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.847943] >ffff888016b18200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.848790] ^ [ 30.849343] ffff888016b18280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.850261] ffff888016b18300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.851175] ================================================================== [ 30.852083] Disabling lock debugging due to kernel taint [ 33.339812] BUG: Bad rss-counter state mm:0000000085c3928a type:MM_FILEPAGES val:33 [ 33.340984] BUG: Bad rss-counter state mm:0000000085c3928a type:MM_ANONPAGES val:22 [ 33.811165] BUG: Bad rss-counter state mm:00000000e7311fe5 type:MM_FILEPAGES val:33 [ 33.812286] BUG: Bad rss-counter state mm:00000000e7311fe5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3700' (ECDSA) to the list of known hosts. 2023/06/21 05:56:37 fuzzer started 2023/06/21 05:56:38 dialing manager at localhost:36067 2023/06/21 05:56:38 checking machine... 2023/06/21 05:56:38 checking revisions... [ 34.467539] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:56:38 testing simple program... [ 34.530919] cgroup: Unknown subsys name 'net' [ 34.610098] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:56:37 Registers: info registers vcpu 0 RAX=ffff88800fde8000 RBX=ffff88800fde7a38 RCX=0000000000000001 RDX=ffff88800fde7a40 RSI=ffff88800fde7a28 RDI=ffff88800fde75b0 RBP=ffff88800fde0000 RSP=ffff88800fde7530 R8 =0000000000000001 R9 =ffff88800fde75e0 R10=0000000000038001 R11=0000000000091bde R12=ffff88800fde7600 R13=ffff88800fde75e8 R14=ffff88800fde7a28 R15=ffff88800fde75a0 RIP=ffffffff81131296 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 00007f0a206ce900 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=00007ffc9f205000 CR3=000000001a30c000 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=2037333a36353a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a36353a3530203132 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007f90b288d620 CR3=000000000d6e4000 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=be5226153ec9af8ea2467babc6f8dc76 XMM02=000000000011cf00eff9b2d0a8fce9cb XMM03=000000000011cfd02c67c8bc2e329bc3 XMM04=3db3358abbc1f46500000000000ae988 XMM05=19e9129bd510f2350000000000131400 XMM06=28b37908a59533c50000000000130268 XMM07=e042d86d42eb936e00000000001215e8 XMM08=60926613559b9c9d000000000011cfd0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000