syzkaller login: [ 38.739371] BUG: Bad rss-counter state mm:00000000b172f3f5 type:MM_FILEPAGES val:33 [ 38.740392] BUG: Bad rss-counter state mm:00000000b172f3f5 type:MM_ANONPAGES val:22 [ 38.775492] ================================================================== [ 38.776360] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.777151] Read of size 8 at addr ffff88800fe783f8 by task sshd/219 [ 38.777832] [ 38.778009] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.778702] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.779492] Call Trace: [ 38.779752] [ 38.779984] dump_stack_lvl+0x91/0xf0 [ 38.780387] print_report+0xcc/0x620 [ 38.780782] ? __virt_addr_valid+0x102/0x340 [ 38.781249] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.781746] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.782253] kasan_report+0xbe/0xf0 [ 38.782643] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.783149] vma_interval_tree_remove+0xc75/0xec0 [ 38.783643] vma_prepare+0xc54/0x11a0 [ 38.784028] __split_vma+0x5af/0x950 [ 38.784421] ? __pfx___split_vma+0x10/0x10 [ 38.784856] ? find_held_lock+0x2c/0x110 [ 38.785287] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.785747] ? lock_is_held_type+0x9f/0x120 [ 38.786188] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.786682] ? mtree_range_walk+0x632/0x900 [ 38.787136] ? mas_walk+0x5c7/0x7c0 [ 38.787523] do_vmi_munmap+0x1f1/0x2b0 [ 38.787918] mmap_region+0x1f9/0x2660 [ 38.788308] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.788728] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.789330] ? __pfx_lock_acquire+0x10/0x10 [ 38.789769] ? __pfx_mmap_region+0x10/0x10 [ 38.790208] ? security_mmap_addr+0x7d/0xa0 [ 38.790644] ? get_unmapped_area+0x1f5/0x3f0 [ 38.791102] do_mmap+0x854/0xf00 [ 38.791463] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.791870] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.792330] ksys_mmap_pgoff+0x3af/0x500 [ 38.792743] do_syscall_64+0x3f/0x90 [ 38.793140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.793686] RIP: 0033:0x7f2b6ccb6d82 [ 38.794064] 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 [ 38.795822] RSP: 002b:00007ffc6df3de78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.796578] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b6ccb6d82 [ 38.797300] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b6c0f0000 [ 38.798002] RBP: 00007f2b6c0f0000 R08: 0000000000000009 R09: 0000000000001000 [ 38.798692] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b058182ec0 [ 38.799392] R13: 00007ffc6df3de90 R14: 00007ffc6df3dec0 R15: 00007ffc6df3e220 [ 38.800096] [ 38.800337] [ 38.800517] Allocated by task 212: [ 38.800879] kasan_save_stack+0x22/0x50 [ 38.801300] kasan_set_track+0x25/0x30 [ 38.801699] __kasan_slab_alloc+0x59/0x70 [ 38.802133] kmem_cache_alloc+0x16b/0x370 [ 38.802559] vm_area_dup+0x20/0x160 [ 38.802934] __split_vma+0x170/0x950 [ 38.803318] split_vma+0xc6/0x110 [ 38.803681] mprotect_fixup+0x8d2/0xb30 [ 38.804092] do_mprotect_pkey+0x87e/0xd40 [ 38.804643] __x64_sys_mprotect+0x78/0xc0 [ 38.805070] do_syscall_64+0x3f/0x90 [ 38.805474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.806002] [ 38.806183] Freed by task 212: [ 38.806516] kasan_save_stack+0x22/0x50 [ 38.806930] kasan_set_track+0x25/0x30 [ 38.807336] kasan_save_free_info+0x2b/0x50 [ 38.807767] __kasan_slab_free+0x10a/0x190 [ 38.808220] kmem_cache_free+0x10d/0x4d0 [ 38.808648] rcu_core+0x8c8/0x2860 [ 38.809014] __do_softirq+0x1b7/0x7d4 [ 38.809436] [ 38.809614] Last potentially related work creation: [ 38.810100] kasan_save_stack+0x22/0x50 [ 38.810521] __kasan_record_aux_stack+0x8e/0xa0 [ 38.810990] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.811541] remove_vma+0x139/0x170 [ 38.811917] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.812382] do_vmi_munmap+0x1f1/0x2b0 [ 38.812783] __vm_munmap+0x138/0x3a0 [ 38.813183] __x64_sys_munmap+0x59/0x80 [ 38.813592] do_syscall_64+0x3f/0x90 [ 38.813988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.814513] [ 38.814695] The buggy address belongs to the object at ffff88800fe783a0 [ 38.814695] which belongs to the cache vm_area_struct of size 168 [ 38.815932] The buggy address is located 88 bytes inside of [ 38.815932] freed 168-byte region [ffff88800fe783a0, ffff88800fe78448) [ 38.817099] [ 38.817300] The buggy address belongs to the physical page: [ 38.817844] page:0000000029a854a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe78 [ 38.818737] memcg:ffff88801594ec01 [ 38.819091] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.819633] page_type: 0xffffffff() [ 38.820003] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.820793] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801594ec01 [ 38.821558] page dumped because: kasan: bad access detected [ 38.822088] [ 38.822263] Memory state around the buggy address: [ 38.822736] ffff88800fe78280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.823422] ffff88800fe78300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.824115] >ffff88800fe78380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.824815] ^ [ 38.825503] ffff88800fe78400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.826197] ffff88800fe78480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.826885] ================================================================== [ 38.827865] Disabling lock debugging due to kernel taint [ 41.083308] BUG: Bad rss-counter state mm:0000000044b5d0d6 type:MM_FILEPAGES val:33 [ 41.084291] BUG: Bad rss-counter state mm:0000000044b5d0d6 type:MM_ANONPAGES val:22 [ 41.575064] BUG: Bad rss-counter state mm:0000000045d45b3f type:MM_FILEPAGES val:33 [ 41.576225] BUG: Bad rss-counter state mm:0000000045d45b3f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28947' (ECDSA) to the list of known hosts. 2023/06/20 11:34:10 fuzzer started 2023/06/20 11:34:10 dialing manager at localhost:36067 2023/06/20 11:34:10 checking machine... 2023/06/20 11:34:10 checking revisions... [ 42.285954] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:34:10 testing simple program... [ 42.335457] cgroup: Unknown subsys name 'net' [ 42.375363] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:34:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c134f RSI=ffffffff83723dcf RDI=ffff88806ce09a78 RBP=ffff88806ce09b10 RSP=ffff88806ce09a50 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000009b1d9 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88800f9bd1c0 R15=ffff88806ce09a78 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007fba96843900 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=00007ffd45b75000 CR3=000000001cde2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fb7cc79c200 CR3=0000000018362000 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=2030313a34333a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a34333a3131203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000