syzkaller login: [ 31.050001] BUG: Bad rss-counter state mm:000000008b357fe4 type:MM_FILEPAGES val:33 [ 31.051011] BUG: Bad rss-counter state mm:000000008b357fe4 type:MM_ANONPAGES val:22 [ 31.210821] ================================================================== [ 31.211762] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.212752] Read of size 8 at addr ffff888018cf5228 by task sshd/220 [ 31.213800] [ 31.214106] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.215063] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.216103] Call Trace: [ 31.216434] [ 31.216739] dump_stack_lvl+0x91/0xf0 [ 31.217253] print_report+0xcc/0x620 [ 31.217826] ? __virt_addr_valid+0x102/0x340 [ 31.218406] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.219044] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.219677] kasan_report+0xbe/0xf0 [ 31.220173] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.220820] vma_interval_tree_remove+0xc75/0xec0 [ 31.221449] vma_prepare+0xc54/0x11a0 [ 31.221971] __split_vma+0x5af/0x950 [ 31.222461] ? __pfx___split_vma+0x10/0x10 [ 31.223006] ? find_held_lock+0x2c/0x110 [ 31.223541] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.224129] ? lock_is_held_type+0x9f/0x120 [ 31.224691] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.225317] ? mtree_range_walk+0x632/0x900 [ 31.225914] ? mas_walk+0x5c7/0x7c0 [ 31.226407] do_vmi_munmap+0x1f1/0x2b0 [ 31.226937] mmap_region+0x1f9/0x2660 [ 31.227444] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.227982] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.228742] ? __pfx_lock_acquire+0x10/0x10 [ 31.229304] ? __pfx_mmap_region+0x10/0x10 [ 31.229899] ? security_mmap_addr+0x7d/0xa0 [ 31.230459] ? get_unmapped_area+0x1f5/0x3f0 [ 31.231055] do_mmap+0x854/0xf00 [ 31.231510] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.232014] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.232613] ksys_mmap_pgoff+0x3af/0x500 [ 31.233133] do_syscall_64+0x3f/0x90 [ 31.233645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234329] RIP: 0033:0x7fa568491d82 [ 31.234818] 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 [ 31.236980] RSP: 002b:00007ffceed296c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.237913] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa568491d82 [ 31.238779] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5678cb000 [ 31.239646] RBP: 00007fa5678cb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.240501] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633ea4f5980 [ 31.241388] R13: 00007ffceed296e0 R14: 00007ffceed29710 R15: 00007ffceed29a70 [ 31.242329] [ 31.242653] [ 31.242880] Allocated by task 213: [ 31.243333] kasan_save_stack+0x22/0x50 [ 31.243877] kasan_set_track+0x25/0x30 [ 31.244396] __kasan_slab_alloc+0x59/0x70 [ 31.244958] kmem_cache_alloc+0x16b/0x370 [ 31.245507] vm_area_dup+0x20/0x160 [ 31.246017] __split_vma+0x170/0x950 [ 31.246503] split_vma+0xc6/0x110 [ 31.246988] mprotect_fixup+0x8d2/0xb30 [ 31.247520] do_mprotect_pkey+0x87e/0xd40 [ 31.248080] __x64_sys_mprotect+0x78/0xc0 [ 31.248652] do_syscall_64+0x3f/0x90 [ 31.249152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.249875] [ 31.250106] Freed by task 213: [ 31.250512] kasan_save_stack+0x22/0x50 [ 31.251062] kasan_set_track+0x25/0x30 [ 31.251588] kasan_save_free_info+0x2b/0x50 [ 31.252161] __kasan_slab_free+0x10a/0x190 [ 31.252736] kmem_cache_free+0x10d/0x4d0 [ 31.253278] rcu_core+0x8c8/0x2860 [ 31.253776] __do_softirq+0x1b7/0x7d4 [ 31.254289] [ 31.254512] Last potentially related work creation: [ 31.255300] kasan_save_stack+0x22/0x50 [ 31.255850] __kasan_record_aux_stack+0x8e/0xa0 [ 31.256454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.257142] remove_vma+0x139/0x170 [ 31.257644] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.258240] do_vmi_munmap+0x1f1/0x2b0 [ 31.258753] __vm_munmap+0x138/0x3a0 [ 31.259248] __x64_sys_munmap+0x59/0x80 [ 31.259777] do_syscall_64+0x3f/0x90 [ 31.260281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.260965] [ 31.261188] The buggy address belongs to the object at ffff888018cf51d0 [ 31.261188] which belongs to the cache vm_area_struct of size 168 [ 31.262775] The buggy address is located 88 bytes inside of [ 31.262775] freed 168-byte region [ffff888018cf51d0, ffff888018cf5278) [ 31.264319] [ 31.264542] The buggy address belongs to the physical page: [ 31.265246] page:0000000023c21ca5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18cf5 [ 31.266430] memcg:ffff888016701801 [ 31.266882] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.267557] page_type: 0xffffffff() [ 31.268035] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.269016] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016701801 [ 31.270002] page dumped because: kasan: bad access detected [ 31.270702] [ 31.270923] Memory state around the buggy address: [ 31.271541] ffff888018cf5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.272457] ffff888018cf5180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.273368] >ffff888018cf5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.274295] ^ [ 31.274882] ffff888018cf5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.275794] ffff888018cf5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.276696] ================================================================== [ 31.277829] Disabling lock debugging due to kernel taint [ 33.235822] BUG: Bad rss-counter state mm:000000008ca8aef9 type:MM_FILEPAGES val:33 [ 33.236802] BUG: Bad rss-counter state mm:000000008ca8aef9 type:MM_ANONPAGES val:22 [ 33.703850] BUG: Bad rss-counter state mm:000000001b8109bd type:MM_FILEPAGES val:33 [ 33.704843] BUG: Bad rss-counter state mm:000000001b8109bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36200' (ECDSA) to the list of known hosts. 2023/06/21 00:57:18 fuzzer started 2023/06/21 00:57:18 dialing manager at localhost:36067 2023/06/21 00:57:18 checking machine... 2023/06/21 00:57:18 checking revisions... [ 34.387141] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:57:18 testing simple program... [ 34.431830] cgroup: Unknown subsys name 'net' [ 34.478756] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:57:18 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=00007f79b0d16ac8 CR3=000000000ca22000 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=6cfb9767345f468a544040e193110519 XMM02=ec2efd57dc4c00df0000000000119fe8 XMM03=2a9e380627ecbc3e000000000011a0b8 XMM04=bc697106ce037d2400000000000ae988 XMM05=43f752682245613f00000000001321e8 XMM06=4fda316b135da52b0000000000131288 XMM07=e042d86d42eb936e0000000000121850 XMM08=2a9e380627ecbc3e000000000011a0b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb133f RBX=ffffffff85d899f8 RCX=ffffffff810bd06c RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff88806cf09998 R8 =ffffffff8608a556 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d899f8 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000216 [----AP-] 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 00007fab70034900 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=00007ffdcd9f5000 CR3=000000000f276000 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=563412feff00545000000000000080fe 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