syzkaller login: [ 30.372799] BUG: Bad rss-counter state mm:00000000ad8802d8 type:MM_FILEPAGES val:33 [ 30.374624] BUG: Bad rss-counter state mm:00000000ad8802d8 type:MM_ANONPAGES val:22 [ 30.549834] ================================================================== [ 30.550914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.551989] Read of size 8 at addr ffff8880167a8140 by task sshd/221 [ 30.552862] [ 30.553090] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.553954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.554960] Call Trace: [ 30.555297] [ 30.555583] dump_stack_lvl+0x91/0xf0 [ 30.556091] print_report+0xcc/0x620 [ 30.556587] ? __virt_addr_valid+0x102/0x340 [ 30.557146] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.557773] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.558404] kasan_report+0xbe/0xf0 [ 30.558893] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.559548] vma_interval_tree_remove+0xc75/0xec0 [ 30.560164] vma_prepare+0xc54/0x11a0 [ 30.560655] __split_vma+0x5af/0x950 [ 30.561131] ? __pfx___split_vma+0x10/0x10 [ 30.561659] ? find_held_lock+0x2c/0x110 [ 30.562184] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.562758] ? lock_is_held_type+0x9f/0x120 [ 30.563441] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.564201] ? mtree_range_walk+0x632/0x900 [ 30.564907] ? mas_walk+0x5c7/0x7c0 [ 30.565526] do_vmi_munmap+0x1f1/0x2b0 [ 30.566135] mmap_region+0x1f9/0x2660 [ 30.566743] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.567438] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.568339] ? __pfx_lock_acquire+0x10/0x10 [ 30.569012] ? __pfx_mmap_region+0x10/0x10 [ 30.569696] ? security_mmap_addr+0x7d/0xa0 [ 30.570378] ? get_unmapped_area+0x1f5/0x3f0 [ 30.571072] do_mmap+0x854/0xf00 [ 30.571658] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.572287] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.573000] ksys_mmap_pgoff+0x3af/0x500 [ 30.573645] do_syscall_64+0x3f/0x90 [ 30.574247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.575069] RIP: 0033:0x7f1780ecbd82 [ 30.575667] 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 [ 30.577866] RSP: 002b:00007ffd941c4db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.578795] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1780ecbd82 [ 30.579678] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1780305000 [ 30.580567] RBP: 00007f1780305000 R08: 0000000000000009 R09: 0000000000001000 [ 30.581450] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bfbdf00b20 [ 30.582321] R13: 00007ffd941c4dd0 R14: 00007ffd941c4e00 R15: 00007ffd941c5160 [ 30.583206] [ 30.583515] [ 30.583741] Allocated by task 214: [ 30.584175] kasan_save_stack+0x22/0x50 [ 30.584709] kasan_set_track+0x25/0x30 [ 30.585217] __kasan_slab_alloc+0x59/0x70 [ 30.585763] kmem_cache_alloc+0x16b/0x370 [ 30.586289] vm_area_dup+0x20/0x160 [ 30.586757] __split_vma+0x170/0x950 [ 30.587253] split_vma+0xc6/0x110 [ 30.587715] mprotect_fixup+0x8d2/0xb30 [ 30.588224] do_mprotect_pkey+0x87e/0xd40 [ 30.588774] __x64_sys_mprotect+0x78/0xc0 [ 30.589315] do_syscall_64+0x3f/0x90 [ 30.589806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.590486] [ 30.590706] Freed by task 214: [ 30.591095] kasan_save_stack+0x22/0x50 [ 30.591631] kasan_set_track+0x25/0x30 [ 30.592130] kasan_save_free_info+0x2b/0x50 [ 30.592677] __kasan_slab_free+0x10a/0x190 [ 30.593214] kmem_cache_free+0x10d/0x4d0 [ 30.593744] rcu_core+0x8c8/0x2860 [ 30.594192] __do_softirq+0x1b7/0x7d4 [ 30.594687] [ 30.594905] Last potentially related work creation: [ 30.595529] kasan_save_stack+0x22/0x50 [ 30.596043] __kasan_record_aux_stack+0x8e/0xa0 [ 30.596638] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.597283] remove_vma+0x139/0x170 [ 30.597762] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.598334] do_vmi_munmap+0x1f1/0x2b0 [ 30.598829] __vm_munmap+0x138/0x3a0 [ 30.599323] __x64_sys_munmap+0x59/0x80 [ 30.599829] do_syscall_64+0x3f/0x90 [ 30.600324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.600986] [ 30.601203] The buggy address belongs to the object at ffff8880167a80e8 [ 30.601203] which belongs to the cache vm_area_struct of size 168 [ 30.602713] The buggy address is located 88 bytes inside of [ 30.602713] freed 168-byte region [ffff8880167a80e8, ffff8880167a8190) [ 30.604159] [ 30.604389] The buggy address belongs to the physical page: [ 30.605057] page:00000000691f075a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167a8 [ 30.606184] memcg:ffff88800f21d501 [ 30.606631] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.607317] page_type: 0xffffffff() [ 30.607780] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.608726] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f21d501 [ 30.609692] page dumped because: kasan: bad access detected [ 30.610389] [ 30.610607] Memory state around the buggy address: [ 30.611200] ffff8880167a8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.612081] ffff8880167a8080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.612962] >ffff8880167a8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.613842] ^ [ 30.614505] ffff8880167a8180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.615408] ffff8880167a8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.616272] ================================================================== [ 30.617317] Disabling lock debugging due to kernel taint [ 32.519722] BUG: Bad rss-counter state mm:00000000b7050012 type:MM_FILEPAGES val:33 [ 32.520692] BUG: Bad rss-counter state mm:00000000b7050012 type:MM_ANONPAGES val:22 [ 32.971570] BUG: Bad rss-counter state mm:00000000d35be52c type:MM_FILEPAGES val:33 [ 32.972658] BUG: Bad rss-counter state mm:00000000d35be52c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29314' (ECDSA) to the list of known hosts. 2023/06/21 01:59:25 fuzzer started 2023/06/21 01:59:25 dialing manager at localhost:36067 2023/06/21 01:59:25 checking machine... 2023/06/21 01:59:25 checking revisions... [ 33.676226] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:59:25 testing simple program... [ 33.728987] cgroup: Unknown subsys name 'net' [ 33.766009] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:59:25 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800dcc6000 RCX=ffffffff83669fa0 RDX=ffff888014750000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000200 RSP=ffff88801474f6e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000200 R11=00000000000b6a61 R12=ffff88800dcc6000 R13=ffff88800f14e000 R14=0000000000400cc0 R15=ffff888008fae000 RIP=ffffffff814c086b RFL=00000206 [-----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 00007f3d1db73900 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=00007f3d1cfc1420 CR3=000000000d5f6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=519f8afb46c145d200000000000ae988 XMM05=e0a4b66832125cb800000000001328d8 XMM06=c291bd5c70af25b900000000001316c8 XMM07=fb795ef6d65770560000000000121a08 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85fa80c8 RCX=ffffffff8366a63b RDX=0000000000000000 RSI=ffffffff863b7f8e RDI=ffffffff85fa80c8 RBP=ffffffff85fa80c8 RSP=ffff888017b170a0 R8 =ffffffff863b7f8e R9 =ffff888017b17198 R10=0000000000038001 R11=000000000008b5c1 R12=ffffffff85fa80c8 R13=ffffffff85fa80c8 R14=ffffffff85fa80c8 R15=dffffc0000000000 RIP=ffffffff8112fc85 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 00007f12d3ce1900 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=00007ffede072000 CR3=000000000b3da000 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=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