syzkaller login: [ 30.428087] BUG: Bad rss-counter state mm:00000000fdf15bd9 type:MM_FILEPAGES val:33 [ 30.429133] BUG: Bad rss-counter state mm:00000000fdf15bd9 type:MM_ANONPAGES val:22 [ 30.608426] ================================================================== [ 30.609450] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.610485] Read of size 8 at addr ffff888015bb9310 by task sshd/220 [ 30.611442] [ 30.611709] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.612666] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.613761] Call Trace: [ 30.614117] [ 30.614430] dump_stack_lvl+0x91/0xf0 [ 30.614976] print_report+0xcc/0x620 [ 30.615509] ? __virt_addr_valid+0x102/0x340 [ 30.616134] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.616815] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.617493] kasan_report+0xbe/0xf0 [ 30.618013] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.618703] vma_interval_tree_remove+0xc75/0xec0 [ 30.619373] vma_prepare+0xc54/0x11a0 [ 30.619910] __split_vma+0x5af/0x950 [ 30.620427] ? __pfx___split_vma+0x10/0x10 [ 30.621013] ? find_held_lock+0x2c/0x110 [ 30.621588] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.622213] ? lock_is_held_type+0x9f/0x120 [ 30.622804] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.623475] ? mtree_range_walk+0x632/0x900 [ 30.624115] ? mas_walk+0x5c7/0x7c0 [ 30.624637] do_vmi_munmap+0x1f1/0x2b0 [ 30.625177] mmap_region+0x1f9/0x2660 [ 30.625704] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.626276] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.627065] ? __pfx_lock_acquire+0x10/0x10 [ 30.627658] ? __pfx_mmap_region+0x10/0x10 [ 30.628244] ? security_mmap_addr+0x7d/0xa0 [ 30.628828] ? get_unmapped_area+0x1f5/0x3f0 [ 30.629440] do_mmap+0x854/0xf00 [ 30.629925] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.630473] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.631090] ksys_mmap_pgoff+0x3af/0x500 [ 30.631662] do_syscall_64+0x3f/0x90 [ 30.632191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.632915] RIP: 0033:0x7f16b2e13d82 [ 30.633421] 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 [ 30.635788] RSP: 002b:00007fffe55230a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.636788] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16b2e13d82 [ 30.637719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16b224d000 [ 30.638659] RBP: 00007f16b224d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.639600] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597f8118ec0 [ 30.640544] R13: 00007fffe55230c0 R14: 00007fffe55230f0 R15: 00007fffe5523450 [ 30.641487] [ 30.641812] [ 30.642050] Allocated by task 213: [ 30.642523] kasan_save_stack+0x22/0x50 [ 30.643086] kasan_set_track+0x25/0x30 [ 30.643635] __kasan_slab_alloc+0x59/0x70 [ 30.644215] kmem_cache_alloc+0x16b/0x370 [ 30.644789] vm_area_dup+0x20/0x160 [ 30.645291] __split_vma+0x170/0x950 [ 30.645810] split_vma+0xc6/0x110 [ 30.646300] mprotect_fixup+0x8d2/0xb30 [ 30.646850] do_mprotect_pkey+0x87e/0xd40 [ 30.647425] __x64_sys_mprotect+0x78/0xc0 [ 30.648014] do_syscall_64+0x3f/0x90 [ 30.648539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.649253] [ 30.649490] Freed by task 213: [ 30.649928] kasan_save_stack+0x22/0x50 [ 30.650485] kasan_set_track+0x25/0x30 [ 30.651034] kasan_save_free_info+0x2b/0x50 [ 30.651635] __kasan_slab_free+0x10a/0x190 [ 30.652225] kmem_cache_free+0x10d/0x4d0 [ 30.652788] rcu_core+0x8c8/0x2860 [ 30.653281] __do_softirq+0x1b7/0x7d4 [ 30.653812] [ 30.654047] Last potentially related work creation: [ 30.654696] kasan_save_stack+0x22/0x50 [ 30.655254] __kasan_record_aux_stack+0x8e/0xa0 [ 30.655904] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.656615] remove_vma+0x139/0x170 [ 30.657114] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.657737] do_vmi_munmap+0x1f1/0x2b0 [ 30.658272] __vm_munmap+0x138/0x3a0 [ 30.658790] __x64_sys_munmap+0x59/0x80 [ 30.659339] do_syscall_64+0x3f/0x90 [ 30.659845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.660492] [ 30.660713] The buggy address belongs to the object at ffff888015bb92b8 [ 30.660713] which belongs to the cache vm_area_struct of size 168 [ 30.662180] The buggy address is located 88 bytes inside of [ 30.662180] freed 168-byte region [ffff888015bb92b8, ffff888015bb9360) [ 30.663601] [ 30.663827] The buggy address belongs to the physical page: [ 30.664484] page:00000000a005974f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15bb9 [ 30.665579] memcg:ffff888015a1d901 [ 30.666010] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.666654] page_type: 0xffffffff() [ 30.667111] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.668041] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a1d901 [ 30.668944] page dumped because: kasan: bad access detected [ 30.669607] [ 30.669833] Memory state around the buggy address: [ 30.670449] ffff888015bb9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.671359] ffff888015bb9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.672275] >ffff888015bb9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.673184] ^ [ 30.673678] ffff888015bb9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.674593] ffff888015bb9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.675498] ================================================================== [ 30.676801] Disabling lock debugging due to kernel taint [ 32.192521] BUG: Bad rss-counter state mm:00000000c307a66e type:MM_FILEPAGES val:33 [ 32.193248] BUG: Bad rss-counter state mm:00000000c307a66e type:MM_ANONPAGES val:22 [ 32.564615] BUG: Bad rss-counter state mm:00000000b3df2ce2 type:MM_FILEPAGES val:33 [ 32.565386] BUG: Bad rss-counter state mm:00000000b3df2ce2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56405' (ECDSA) to the list of known hosts. 2023/06/20 13:53:23 fuzzer started 2023/06/20 13:53:23 dialing manager at localhost:36067 2023/06/20 13:53:23 checking machine... 2023/06/20 13:53:23 checking revisions... [ 33.141966] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:53:24 testing simple program... [ 33.185978] cgroup: Unknown subsys name 'net' [ 33.239800] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:53:23 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=00007f8d934f2bd0 CR3=000000000e62a000 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=33353a3331203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303830 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8450cc8c RCX=0000000000000001 RDX=1ffff1100d9e135a RSI=ffff888018e8ff30 RDI=ffffffff8450cc8c RBP=ffff88806cf09ad0 RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b53d8 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff8880147d51c0 R15=ffff88800d476000 RIP=ffffffff811fc7a0 RFL=00000246 [---Z-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 00007f1685ab3900 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=00007ffc37617000 CR3=0000000018f30000 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