syzkaller login: [ 30.785429] BUG: Bad rss-counter state mm:00000000905e927a type:MM_FILEPAGES val:33 [ 30.786511] BUG: Bad rss-counter state mm:00000000905e927a type:MM_ANONPAGES val:22 [ 30.962436] ================================================================== [ 30.963447] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.964527] Read of size 8 at addr ffff88800e6aad08 by task sshd/221 [ 30.965305] [ 30.965527] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.966415] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.967527] Call Trace: [ 30.967889] [ 30.968235] dump_stack_lvl+0x91/0xf0 [ 30.968799] print_report+0xcc/0x620 [ 30.969370] ? __virt_addr_valid+0x102/0x340 [ 30.970004] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.970737] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.971453] kasan_report+0xbe/0xf0 [ 30.972012] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.972762] vma_interval_tree_remove+0xc75/0xec0 [ 30.973475] vma_prepare+0xc54/0x11a0 [ 30.974064] __split_vma+0x5af/0x950 [ 30.974667] ? __pfx___split_vma+0x10/0x10 [ 30.975309] ? find_held_lock+0x2c/0x110 [ 30.975922] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.976616] ? lock_is_held_type+0x9f/0x120 [ 30.977264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.978004] ? mtree_range_walk+0x632/0x900 [ 30.978687] ? mas_walk+0x5c7/0x7c0 [ 30.979265] do_vmi_munmap+0x1f1/0x2b0 [ 30.979837] mmap_region+0x1f9/0x2660 [ 30.980414] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.981005] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.981878] ? __pfx_lock_acquire+0x10/0x10 [ 30.982546] ? __pfx_mmap_region+0x10/0x10 [ 30.983179] ? security_mmap_addr+0x7d/0xa0 [ 30.983803] ? get_unmapped_area+0x1f5/0x3f0 [ 30.984474] do_mmap+0x854/0xf00 [ 30.984986] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.985599] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.986305] ksys_mmap_pgoff+0x3af/0x500 [ 30.986903] do_syscall_64+0x3f/0x90 [ 30.987499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.988277] RIP: 0033:0x7fd4eb50cd82 [ 30.988826] 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 [ 30.991410] RSP: 002b:00007fff12373688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.992479] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4eb50cd82 [ 30.993470] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4ea946000 [ 30.994530] RBP: 00007fd4ea946000 R08: 0000000000000009 R09: 0000000000001000 [ 30.995529] R10: 0000000000000812 R11: 0000000000000206 R12: 000055954d3c2ec0 [ 30.996530] R13: 00007fff123736a0 R14: 00007fff123736d0 R15: 00007fff12373a30 [ 30.997530] [ 30.997875] [ 30.998144] Allocated by task 214: [ 30.998660] kasan_save_stack+0x22/0x50 [ 30.999262] kasan_set_track+0x25/0x30 [ 30.999835] __kasan_slab_alloc+0x59/0x70 [ 31.000457] kmem_cache_alloc+0x16b/0x370 [ 31.001051] vm_area_dup+0x20/0x160 [ 31.001584] __split_vma+0x170/0x950 [ 31.002167] split_vma+0xc6/0x110 [ 31.002678] mprotect_fixup+0x8d2/0xb30 [ 31.003272] do_mprotect_pkey+0x87e/0xd40 [ 31.003864] __x64_sys_mprotect+0x78/0xc0 [ 31.004481] do_syscall_64+0x3f/0x90 [ 31.005023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.005778] [ 31.006050] Freed by task 214: [ 31.006521] kasan_save_stack+0x22/0x50 [ 31.007111] kasan_set_track+0x25/0x30 [ 31.007688] kasan_save_free_info+0x2b/0x50 [ 31.008322] __kasan_slab_free+0x10a/0x190 [ 31.008939] kmem_cache_free+0x10d/0x4d0 [ 31.009542] rcu_core+0x8c8/0x2860 [ 31.010067] __do_softirq+0x1b7/0x7d4 [ 31.010645] [ 31.010890] Last potentially related work creation: [ 31.011565] kasan_save_stack+0x22/0x50 [ 31.012141] __kasan_record_aux_stack+0x8e/0xa0 [ 31.012785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.013505] remove_vma+0x139/0x170 [ 31.014023] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.014671] do_vmi_munmap+0x1f1/0x2b0 [ 31.015228] __vm_munmap+0x138/0x3a0 [ 31.015743] __x64_sys_munmap+0x59/0x80 [ 31.016306] do_syscall_64+0x3f/0x90 [ 31.016828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.017547] [ 31.017783] The buggy address belongs to the object at ffff88800e6aacb0 [ 31.017783] which belongs to the cache vm_area_struct of size 168 [ 31.019454] The buggy address is located 88 bytes inside of [ 31.019454] freed 168-byte region [ffff88800e6aacb0, ffff88800e6aad58) [ 31.021018] [ 31.021274] The buggy address belongs to the physical page: [ 31.022003] page:0000000079937cbb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6aa [ 31.023231] memcg:ffff888014422001 [ 31.023697] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.024479] page_type: 0xffffffff() [ 31.024977] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.026017] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014422001 [ 31.027037] page dumped because: kasan: bad access detected [ 31.027767] [ 31.028004] Memory state around the buggy address: [ 31.028645] ffff88800e6aac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.029626] ffff88800e6aac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.030613] >ffff88800e6aad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.031566] ^ [ 31.032044] ffff88800e6aad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.032996] ffff88800e6aae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.033990] ================================================================== [ 31.035184] Disabling lock debugging due to kernel taint [ 33.159825] BUG: Bad rss-counter state mm:00000000d5d103e0 type:MM_FILEPAGES val:33 [ 33.161126] BUG: Bad rss-counter state mm:00000000d5d103e0 type:MM_ANONPAGES val:22 [ 33.539092] BUG: Bad rss-counter state mm:0000000017a4dffa type:MM_FILEPAGES val:33 [ 33.540018] BUG: Bad rss-counter state mm:0000000017a4dffa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32744' (ECDSA) to the list of known hosts. 2023/06/20 17:58:12 fuzzer started 2023/06/20 17:58:13 dialing manager at localhost:36067 2023/06/20 17:58:13 checking machine... 2023/06/20 17:58:13 checking revisions... [ 34.198719] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:58:13 testing simple program... [ 34.253574] cgroup: Unknown subsys name 'net' [ 34.299178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:58:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880160d0488 RCX=0000000000000000 RDX=1ffff11002c2d7a2 RSI=ffffffff81c672ad RDI=ffff88801616bd10 RBP=ffff8880160d0488 RSP=ffff88801478f6d8 R8 =0000000000000007 R9 =0000000000000fff R10=ffff88801616bd10 R11=0000000000000000 R12=ffff88801616bd10 R13=0000000000000000 R14=ffff8880162ae5c0 R15=ffff88801616bd34 RIP=ffffffff81c672c2 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0490cc6900 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=00007f049010f3e0 CR3=000000000d602000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=87c1e7e3cac0995e00000000000ae988 XMM05=e51863b507df98d20000000000132f78 XMM06=c291bd5c70af25b90000000000131d68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffe493b6d58 CR3=000000000c9c6000 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=2032313a38353a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a38353a3731203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000