syzkaller login: [ 31.011179] BUG: Bad rss-counter state mm:000000009ec8e075 type:MM_FILEPAGES val:33 [ 31.012583] BUG: Bad rss-counter state mm:000000009ec8e075 type:MM_ANONPAGES val:22 [ 31.159422] ================================================================== [ 31.160550] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.161784] Read of size 8 at addr ffff8880166664e0 by task sshd/219 [ 31.162695] [ 31.162958] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.164031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.165226] Call Trace: [ 31.165577] [ 31.165863] dump_stack_lvl+0x91/0xf0 [ 31.166369] print_report+0xcc/0x620 [ 31.166860] ? __virt_addr_valid+0x102/0x340 [ 31.167412] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.168027] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.168643] kasan_report+0xbe/0xf0 [ 31.169138] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.169774] vma_interval_tree_remove+0xc75/0xec0 [ 31.170388] vma_prepare+0xc54/0x11a0 [ 31.170863] __split_vma+0x5af/0x950 [ 31.171344] ? __pfx___split_vma+0x10/0x10 [ 31.171886] ? find_held_lock+0x2c/0x110 [ 31.172411] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.172994] ? lock_is_held_type+0x9f/0x120 [ 31.173546] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.174159] ? mtree_range_walk+0x632/0x900 [ 31.174724] ? mas_walk+0x5c7/0x7c0 [ 31.175204] do_vmi_munmap+0x1f1/0x2b0 [ 31.175701] mmap_region+0x1f9/0x2660 [ 31.176191] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.176719] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.177453] ? __pfx_lock_acquire+0x10/0x10 [ 31.178002] ? __pfx_mmap_region+0x10/0x10 [ 31.178537] ? security_mmap_addr+0x7d/0xa0 [ 31.179073] ? get_unmapped_area+0x1f5/0x3f0 [ 31.179636] do_mmap+0x854/0xf00 [ 31.180075] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.180571] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.181153] ksys_mmap_pgoff+0x3af/0x500 [ 31.181663] do_syscall_64+0x3f/0x90 [ 31.182143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.182810] RIP: 0033:0x7f4a349ccd82 [ 31.183273] 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 [ 31.185435] RSP: 002b:00007ffc2dc2dc58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.186367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a349ccd82 [ 31.187227] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a33e06000 [ 31.188094] RBP: 00007f4a33e06000 R08: 0000000000000009 R09: 0000000000001000 [ 31.188958] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645d494dec0 [ 31.189814] R13: 00007ffc2dc2dc70 R14: 00007ffc2dc2dca0 R15: 00007ffc2dc2e000 [ 31.190684] [ 31.190974] [ 31.191195] Allocated by task 212: [ 31.191633] kasan_save_stack+0x22/0x50 [ 31.192143] kasan_set_track+0x25/0x30 [ 31.192639] __kasan_slab_alloc+0x59/0x70 [ 31.193179] kmem_cache_alloc+0x16b/0x370 [ 31.193709] vm_area_dup+0x20/0x160 [ 31.194168] __split_vma+0x170/0x950 [ 31.194639] split_vma+0xc6/0x110 [ 31.195086] mprotect_fixup+0x8d2/0xb30 [ 31.195587] do_mprotect_pkey+0x87e/0xd40 [ 31.196116] __x64_sys_mprotect+0x78/0xc0 [ 31.196644] do_syscall_64+0x3f/0x90 [ 31.197125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.197778] [ 31.197992] Freed by task 212: [ 31.198384] kasan_save_stack+0x22/0x50 [ 31.198897] kasan_set_track+0x25/0x30 [ 31.199388] kasan_save_free_info+0x2b/0x50 [ 31.199921] __kasan_slab_free+0x10a/0x190 [ 31.200455] kmem_cache_free+0x10d/0x4d0 [ 31.200987] rcu_core+0x8c8/0x2860 [ 31.201439] __do_softirq+0x1b7/0x7d4 [ 31.201921] [ 31.202137] Last potentially related work creation: [ 31.202735] kasan_save_stack+0x22/0x50 [ 31.203242] __kasan_record_aux_stack+0x8e/0xa0 [ 31.203828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.204477] remove_vma+0x139/0x170 [ 31.204946] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.205506] do_vmi_munmap+0x1f1/0x2b0 [ 31.205989] __vm_munmap+0x138/0x3a0 [ 31.206454] __x64_sys_munmap+0x59/0x80 [ 31.206957] do_syscall_64+0x3f/0x90 [ 31.207437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208084] [ 31.208302] The buggy address belongs to the object at ffff888016666488 [ 31.208302] which belongs to the cache vm_area_struct of size 168 [ 31.209795] The buggy address is located 88 bytes inside of [ 31.209795] freed 168-byte region [ffff888016666488, ffff888016666530) [ 31.211221] [ 31.211435] The buggy address belongs to the physical page: [ 31.212097] page:000000001f90bf56 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16666 [ 31.213215] memcg:ffff88800e7cd401 [ 31.213642] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.214286] page_type: 0xffffffff() [ 31.214735] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.215658] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7cd401 [ 31.216562] page dumped because: kasan: bad access detected [ 31.217246] [ 31.217462] Memory state around the buggy address: [ 31.218050] ffff888016666380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.218921] ffff888016666400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.219788] >ffff888016666480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.220654] ^ [ 31.221437] ffff888016666500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.222310] ffff888016666580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.223168] ================================================================== [ 31.224164] Disabling lock debugging due to kernel taint [ 33.206501] BUG: Bad rss-counter state mm:0000000036dc9af9 type:MM_FILEPAGES val:33 [ 33.207685] BUG: Bad rss-counter state mm:0000000036dc9af9 type:MM_ANONPAGES val:22 [ 33.694553] BUG: Bad rss-counter state mm:000000002a000701 type:MM_FILEPAGES val:33 [ 33.695724] BUG: Bad rss-counter state mm:000000002a000701 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21060' (ECDSA) to the list of known hosts. 2023/06/21 04:33:44 fuzzer started 2023/06/21 04:33:44 dialing manager at localhost:36067 2023/06/21 04:33:44 checking machine... 2023/06/21 04:33:44 checking revisions... [ 34.369760] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:33:44 testing simple program... [ 34.416473] cgroup: Unknown subsys name 'net' [ 34.475945] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:33:44 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=00007f41918290b0 CR3=000000000ee34000 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=33333a3430203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323939 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=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff814c8584 RDI=ffff888015be55b4 RBP=0000000000000000 RSP=ffff88800f177060 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000092cc0 RIP=ffffffff814c0871 RFL=00000293 [--S-A-C] 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 00007f4191271900 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=00007ffcd4a20000 CR3=000000001ab86000 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