syzkaller login: [ 32.270865] BUG: Bad rss-counter state mm:00000000192ebe8b type:MM_FILEPAGES val:33 [ 32.272343] BUG: Bad rss-counter state mm:00000000192ebe8b type:MM_ANONPAGES val:22 [ 32.423717] ================================================================== [ 32.424530] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.425372] Read of size 8 at addr ffff88800e075968 by task sshd/221 [ 32.426205] [ 32.426410] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.427197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.428091] Call Trace: [ 32.428391] [ 32.428655] dump_stack_lvl+0x91/0xf0 [ 32.429109] print_report+0xcc/0x620 [ 32.429558] ? __virt_addr_valid+0x102/0x340 [ 32.430078] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.430638] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.431194] kasan_report+0xbe/0xf0 [ 32.431634] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.432205] vma_interval_tree_remove+0xc75/0xec0 [ 32.432762] vma_prepare+0xc54/0x11a0 [ 32.433203] __split_vma+0x5af/0x950 [ 32.433628] ? __pfx___split_vma+0x10/0x10 [ 32.434138] ? find_held_lock+0x2c/0x110 [ 32.434621] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.435149] ? lock_is_held_type+0x9f/0x120 [ 32.435645] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.436190] ? mtree_range_walk+0x632/0x900 [ 32.436686] ? mas_walk+0x5c7/0x7c0 [ 32.437118] do_vmi_munmap+0x1f1/0x2b0 [ 32.437565] mmap_region+0x1f9/0x2660 [ 32.438006] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.438471] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.439116] ? __pfx_lock_acquire+0x10/0x10 [ 32.439602] ? __pfx_mmap_region+0x10/0x10 [ 32.440083] ? security_mmap_addr+0x7d/0xa0 [ 32.440564] ? get_unmapped_area+0x1f5/0x3f0 [ 32.441063] do_mmap+0x854/0xf00 [ 32.441465] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.441927] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.442441] ksys_mmap_pgoff+0x3af/0x500 [ 32.442907] do_syscall_64+0x3f/0x90 [ 32.443344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.443937] RIP: 0033:0x7f16f865ad82 [ 32.444350] 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 [ 32.446661] RSP: 002b:00007fffaa4828f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.447891] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16f865ad82 [ 32.449048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16f7a94000 [ 32.450213] RBP: 00007f16f7a94000 R08: 0000000000000009 R09: 0000000000001000 [ 32.451372] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644150a2d90 [ 32.452523] R13: 00007fffaa482910 R14: 00007fffaa482940 R15: 00007fffaa482ca0 [ 32.453736] [ 32.454124] [ 32.454372] Allocated by task 213: [ 32.454866] kasan_save_stack+0x22/0x50 [ 32.455435] kasan_set_track+0x25/0x30 [ 32.455995] __kasan_slab_alloc+0x59/0x70 [ 32.456591] kmem_cache_alloc+0x16b/0x370 [ 32.457206] vm_area_dup+0x20/0x160 [ 32.457727] __split_vma+0x170/0x950 [ 32.458261] split_vma+0xc6/0x110 [ 32.458753] mprotect_fixup+0x8d2/0xb30 [ 32.459317] do_mprotect_pkey+0x87e/0xd40 [ 32.459910] __x64_sys_mprotect+0x78/0xc0 [ 32.460509] do_syscall_64+0x3f/0x90 [ 32.461029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.461773] [ 32.462017] Freed by task 213: [ 32.462477] kasan_save_stack+0x22/0x50 [ 32.463034] kasan_set_track+0x25/0x30 [ 32.463589] kasan_save_free_info+0x2b/0x50 [ 32.464187] __kasan_slab_free+0x10a/0x190 [ 32.464793] kmem_cache_free+0x10d/0x4d0 [ 32.465374] rcu_core+0x8c8/0x2860 [ 32.465896] __do_softirq+0x1b7/0x7d4 [ 32.466437] [ 32.466682] Last potentially related work creation: [ 32.467358] kasan_save_stack+0x22/0x50 [ 32.467927] __kasan_record_aux_stack+0x8e/0xa0 [ 32.468569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.469298] remove_vma+0x139/0x170 [ 32.469819] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.470428] do_vmi_munmap+0x1f1/0x2b0 [ 32.470980] __vm_munmap+0x138/0x3a0 [ 32.471525] __x64_sys_munmap+0x59/0x80 [ 32.472106] do_syscall_64+0x3f/0x90 [ 32.472651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.473390] [ 32.473630] The buggy address belongs to the object at ffff88800e075910 [ 32.473630] which belongs to the cache vm_area_struct of size 168 [ 32.475330] The buggy address is located 88 bytes inside of [ 32.475330] freed 168-byte region [ffff88800e075910, ffff88800e0759b8) [ 32.476902] [ 32.477146] The buggy address belongs to the physical page: [ 32.477933] page:00000000d45f8ab1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe075 [ 32.479203] memcg:ffff88800da29601 [ 32.479699] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.480458] page_type: 0xffffffff() [ 32.480986] raw: 0100000000000200 ffff88800879fc80 ffffea00003ad3c0 dead000000000002 [ 32.482102] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da29601 [ 32.483151] page dumped because: kasan: bad access detected [ 32.483956] [ 32.484206] Memory state around the buggy address: [ 32.484888] ffff88800e075800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.485899] ffff88800e075880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.486908] >ffff88800e075900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.487906] ^ [ 32.488832] ffff88800e075980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.489856] ffff88800e075a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.490845] ================================================================== [ 32.492049] Disabling lock debugging due to kernel taint [ 34.427768] BUG: Bad rss-counter state mm:000000005ef47f17 type:MM_FILEPAGES val:33 [ 34.428682] BUG: Bad rss-counter state mm:000000005ef47f17 type:MM_ANONPAGES val:22 [ 34.883916] BUG: Bad rss-counter state mm:00000000a58bdec5 type:MM_FILEPAGES val:33 [ 34.884898] BUG: Bad rss-counter state mm:00000000a58bdec5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52265' (ECDSA) to the list of known hosts. 2023/06/19 11:50:11 fuzzer started 2023/06/19 11:50:12 dialing manager at localhost:44161 2023/06/19 11:50:12 checking machine... 2023/06/19 11:50:12 checking revisions... [ 35.643130] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:50:12 testing simple program... [ 35.699984] cgroup: Unknown subsys name 'net' [ 35.738722] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:50:09 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002f9af17 RSP=ffff888017cd78a8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff888009cb3000 RIP=ffffffff812d86a2 RFL=00000247 [---Z-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 00007f96734e9900 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=00007ffe99a24000 CR3=0000000015ab2000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fb8a5cbeae0 CR3=000000001a0ea000 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=2031313a30353a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a30353a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000