syzkaller login: [ 30.675468] BUG: Bad rss-counter state mm:00000000febe3400 type:MM_FILEPAGES val:33 [ 30.676803] BUG: Bad rss-counter state mm:00000000febe3400 type:MM_ANONPAGES val:22 [ 30.845815] ================================================================== [ 30.846818] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.847745] Read of size 8 at addr ffff888015cdf228 by task sshd/219 [ 30.848609] [ 30.848982] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.849880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.850913] Call Trace: [ 30.851248] [ 30.851561] dump_stack_lvl+0x91/0xf0 [ 30.852133] print_report+0xcc/0x620 [ 30.852640] ? __virt_addr_valid+0x102/0x340 [ 30.853177] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.853893] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854504] kasan_report+0xbe/0xf0 [ 30.854993] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855630] vma_interval_tree_remove+0xc75/0xec0 [ 30.856259] vma_prepare+0xc54/0x11a0 [ 30.856752] __split_vma+0x5af/0x950 [ 30.857238] ? __pfx___split_vma+0x10/0x10 [ 30.857822] ? find_held_lock+0x2c/0x110 [ 30.858462] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.859100] ? lock_is_held_type+0x9f/0x120 [ 30.859676] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.860403] ? mtree_range_walk+0x632/0x900 [ 30.860980] ? mas_walk+0x5c7/0x7c0 [ 30.861514] do_vmi_munmap+0x1f1/0x2b0 [ 30.862076] mmap_region+0x1f9/0x2660 [ 30.862683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.863222] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.864059] ? __pfx_lock_acquire+0x10/0x10 [ 30.864685] ? __pfx_mmap_region+0x10/0x10 [ 30.865238] ? security_mmap_addr+0x7d/0xa0 [ 30.865847] ? get_unmapped_area+0x1f5/0x3f0 [ 30.866459] do_mmap+0x854/0xf00 [ 30.866944] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.867465] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.868169] ksys_mmap_pgoff+0x3af/0x500 [ 30.868705] do_syscall_64+0x3f/0x90 [ 30.869233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.870018] RIP: 0033:0x7f0697691d82 [ 30.870583] 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 [ 30.873031] RSP: 002b:00007fffc00dc6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.874115] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0697691d82 [ 30.875114] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0696acb000 [ 30.876115] RBP: 00007f0696acb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.877078] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5fb70dd90 [ 30.878015] R13: 00007fffc00dc710 R14: 00007fffc00dc740 R15: 00007fffc00dcaa0 [ 30.879068] [ 30.879439] [ 30.879678] Allocated by task 212: [ 30.880143] kasan_save_stack+0x22/0x50 [ 30.880711] kasan_set_track+0x25/0x30 [ 30.881312] __kasan_slab_alloc+0x59/0x70 [ 30.881916] kmem_cache_alloc+0x16b/0x370 [ 30.882503] vm_area_dup+0x20/0x160 [ 30.883074] __split_vma+0x170/0x950 [ 30.883550] split_vma+0xc6/0x110 [ 30.884055] mprotect_fixup+0x8d2/0xb30 [ 30.884639] do_mprotect_pkey+0x87e/0xd40 [ 30.885272] __x64_sys_mprotect+0x78/0xc0 [ 30.885847] do_syscall_64+0x3f/0x90 [ 30.886433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887225] [ 30.887467] Freed by task 212: [ 30.887883] kasan_save_stack+0x22/0x50 [ 30.888489] kasan_set_track+0x25/0x30 [ 30.889040] kasan_save_free_info+0x2b/0x50 [ 30.889626] __kasan_slab_free+0x10a/0x190 [ 30.890200] kmem_cache_free+0x10d/0x4d0 [ 30.890865] rcu_core+0x8c8/0x2860 [ 30.891331] __do_softirq+0x1b7/0x7d4 [ 30.891889] [ 30.892154] Last potentially related work creation: [ 30.892869] kasan_save_stack+0x22/0x50 [ 30.893394] __kasan_record_aux_stack+0x8e/0xa0 [ 30.894056] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.894810] remove_vma+0x139/0x170 [ 30.895352] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.896011] do_vmi_munmap+0x1f1/0x2b0 [ 30.896534] __vm_munmap+0x138/0x3a0 [ 30.897035] __x64_sys_munmap+0x59/0x80 [ 30.897586] do_syscall_64+0x3f/0x90 [ 30.898207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.898942] [ 30.899165] The buggy address belongs to the object at ffff888015cdf1d0 [ 30.899165] which belongs to the cache vm_area_struct of size 168 [ 30.900887] The buggy address is located 88 bytes inside of [ 30.900887] freed 168-byte region [ffff888015cdf1d0, ffff888015cdf278) [ 30.902516] [ 30.902783] The buggy address belongs to the physical page: [ 30.903570] page:0000000042a94c75 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15cdf [ 30.904774] memcg:ffff888013f94801 [ 30.905335] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.906074] page_type: 0xffffffff() [ 30.906576] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.907634] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f94801 [ 30.908626] page dumped because: kasan: bad access detected [ 30.909439] [ 30.909677] Memory state around the buggy address: [ 30.910330] ffff888015cdf100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.911372] ffff888015cdf180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.912321] >ffff888015cdf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.913333] ^ [ 30.913966] ffff888015cdf280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.915019] ffff888015cdf300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.915906] ================================================================== [ 30.917006] Disabling lock debugging due to kernel taint [ 32.809294] BUG: Bad rss-counter state mm:00000000f60716be type:MM_FILEPAGES val:33 [ 32.810797] BUG: Bad rss-counter state mm:00000000f60716be type:MM_ANONPAGES val:22 [ 33.298186] BUG: Bad rss-counter state mm:000000000a9aa9f3 type:MM_FILEPAGES val:33 [ 33.299134] BUG: Bad rss-counter state mm:000000000a9aa9f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14040' (ECDSA) to the list of known hosts. 2023/06/21 03:53:42 fuzzer started 2023/06/21 03:53:42 dialing manager at localhost:36067 2023/06/21 03:53:42 checking machine... 2023/06/21 03:53:42 checking revisions... [ 34.006418] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:53:42 testing simple program... [ 34.056468] cgroup: Unknown subsys name 'net' [ 34.095819] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:53:42 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=00007ffe581f23c8 CR3=0000000005482000 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=00007fa744b84510000055f42e923790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888016bb79f0 RCX=ffffffff86138e01 RDX=1ffff11002d76f3f RSI=ffffffff8180c705 RDI=ffff888016bb79f8 RBP=0000000000000001 RSP=ffff888016bb7908 R8 =ffffffff86138e90 R9 =ffff888016bb7968 R10=0000000000038001 R11=0000000000020d8f R12=ffff888016bb79f0 R13=0000000000000000 R14=ffff8880164a9b40 R15=ffff888019f14000 RIP=ffffffff813ad4be 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 00007fd0b0add900 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=00007fd0b10950b0 CR3=000000000dde0000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000