syzkaller login: [ 28.940862] BUG: Bad rss-counter state mm:00000000df0bd0ee type:MM_FILEPAGES val:33 [ 28.942091] BUG: Bad rss-counter state mm:00000000df0bd0ee type:MM_ANONPAGES val:22 [ 28.981334] ================================================================== [ 28.982519] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.983625] Read of size 8 at addr ffff8880096584e0 by task sshd/220 [ 28.984463] [ 28.984705] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.985676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.986736] Call Trace: [ 28.987057] [ 28.987389] dump_stack_lvl+0x91/0xf0 [ 28.987972] print_report+0xcc/0x620 [ 28.988467] ? __virt_addr_valid+0x102/0x340 [ 28.989010] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.989635] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.990241] kasan_report+0xbe/0xf0 [ 28.990718] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.991337] vma_interval_tree_remove+0xc75/0xec0 [ 28.991936] vma_prepare+0xc54/0x11a0 [ 28.992412] __split_vma+0x5af/0x950 [ 28.992880] ? __pfx___split_vma+0x10/0x10 [ 28.993405] ? find_held_lock+0x2c/0x110 [ 28.993921] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.994501] ? lock_is_held_type+0x9f/0x120 [ 28.995047] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.995650] ? mtree_range_walk+0x632/0x900 [ 28.996203] ? mas_walk+0x5c7/0x7c0 [ 28.996674] do_vmi_munmap+0x1f1/0x2b0 [ 28.997167] mmap_region+0x1f9/0x2660 [ 28.997644] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.998159] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.998872] ? __pfx_lock_acquire+0x10/0x10 [ 28.999408] ? __pfx_mmap_region+0x10/0x10 [ 28.999937] ? security_mmap_addr+0x7d/0xa0 [ 29.000466] ? get_unmapped_area+0x1f5/0x3f0 [ 29.001011] do_mmap+0x854/0xf00 [ 29.001449] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.001943] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.002526] ksys_mmap_pgoff+0x3af/0x500 [ 29.003033] do_syscall_64+0x3f/0x90 [ 29.003507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.004152] RIP: 0033:0x7f4f51593d82 [ 29.004609] 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 [ 29.006733] RSP: 002b:00007fff32434e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.007632] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f51593d82 [ 29.008474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f509cd000 [ 29.009316] RBP: 00007f4f509cd000 R08: 0000000000000009 R09: 0000000000001000 [ 29.010169] R10: 0000000000000812 R11: 0000000000000206 R12: 000055934c9d6ec0 [ 29.011017] R13: 00007fff32434e50 R14: 00007fff32434e80 R15: 00007fff324351e0 [ 29.011863] [ 29.012156] [ 29.012374] Allocated by task 213: [ 29.012796] kasan_save_stack+0x22/0x50 [ 29.013307] kasan_set_track+0x25/0x30 [ 29.013800] __kasan_slab_alloc+0x59/0x70 [ 29.014340] kmem_cache_alloc+0x16b/0x370 [ 29.014850] vm_area_dup+0x20/0x160 [ 29.015305] __split_vma+0x170/0x950 [ 29.015767] split_vma+0xc6/0x110 [ 29.016208] mprotect_fixup+0x8d2/0xb30 [ 29.016706] do_mprotect_pkey+0x87e/0xd40 [ 29.017228] __x64_sys_mprotect+0x78/0xc0 [ 29.017745] do_syscall_64+0x3f/0x90 [ 29.018215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.018870] [ 29.019086] Freed by task 213: [ 29.019475] kasan_save_stack+0x22/0x50 [ 29.019983] kasan_set_track+0x25/0x30 [ 29.020475] kasan_save_free_info+0x2b/0x50 [ 29.021001] __kasan_slab_free+0x10a/0x190 [ 29.021539] kmem_cache_free+0x10d/0x4d0 [ 29.022045] rcu_core+0x8c8/0x2860 [ 29.022507] __do_softirq+0x1b7/0x7d4 [ 29.022988] [ 29.023205] Last potentially related work creation: [ 29.023798] kasan_save_stack+0x22/0x50 [ 29.024301] __kasan_record_aux_stack+0x8e/0xa0 [ 29.024875] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.025519] remove_vma+0x139/0x170 [ 29.026003] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.026580] do_vmi_munmap+0x1f1/0x2b0 [ 29.027071] __vm_munmap+0x138/0x3a0 [ 29.027549] __x64_sys_munmap+0x59/0x80 [ 29.028048] do_syscall_64+0x3f/0x90 [ 29.028527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.029184] [ 29.029397] The buggy address belongs to the object at ffff888009658488 [ 29.029397] which belongs to the cache vm_area_struct of size 168 [ 29.030882] The buggy address is located 88 bytes inside of [ 29.030882] freed 168-byte region [ffff888009658488, ffff888009658530) [ 29.032292] [ 29.032507] The buggy address belongs to the physical page: [ 29.033166] page:00000000e2c263f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9658 [ 29.034252] memcg:ffff88800d6a3301 [ 29.034696] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.035355] page_type: 0xffffffff() [ 29.035808] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.036734] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6a3301 [ 29.037651] page dumped because: kasan: bad access detected [ 29.038319] [ 29.038536] Memory state around the buggy address: [ 29.039124] ffff888009658380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.039997] ffff888009658400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 29.040862] >ffff888009658480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.041734] ^ [ 29.042500] ffff888009658500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 29.043360] ffff888009658580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.044221] ================================================================== [ 29.045191] Disabling lock debugging due to kernel taint [ 31.559582] BUG: Bad rss-counter state mm:000000008a159f6b type:MM_FILEPAGES val:33 [ 31.560568] BUG: Bad rss-counter state mm:000000008a159f6b type:MM_ANONPAGES val:22 [ 32.051739] BUG: Bad rss-counter state mm:00000000c583a95f type:MM_FILEPAGES val:33 [ 32.052746] BUG: Bad rss-counter state mm:00000000c583a95f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12740' (ECDSA) to the list of known hosts. 2023/06/20 16:12:18 fuzzer started 2023/06/20 16:12:18 dialing manager at localhost:36067 2023/06/20 16:12:18 checking machine... 2023/06/20 16:12:18 checking revisions... [ 32.818729] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:12:19 testing simple program... [ 32.874312] cgroup: Unknown subsys name 'net' [ 32.927664] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:12:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180effe RCX=ffffffff86138e01 RDX=1ffff1100d9c1359 RSI=0000000000000000 RDI=ffffffff8180effe RBP=ffffffff8180effe RSP=ffff88806ce09a20 R8 =ffffffff86138e90 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020d8f R12=0000000000000001 R13=0000000000000000 R14=ffff888014493680 R15=ffff888016bae450 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007fca760b0900 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=00007fca754cd530 CR3=0000000008eda000 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=9eeb7740c3999687c24b6049679c7828 XMM02=000000000011bdb8d59e07bde36eea69 XMM03=000000000011bee0ec2efd57dc4c00df XMM04=70995ce2aa42d5a100000000000ae988 XMM05=f2dffa76ffbadc940000000000133858 XMM06=c0efd06825aeabf80000000000132900 XMM07=fb795ef6d65770560000000000122b80 XMM08=2c67c8bc2e329bc3000000000011bee0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffffffff85fa44a4 RCX=ffffffff83632182 RDX=0000000000000000 RSI=ffffffff863b252e RDI=ffffffff85fa4488 RBP=ffffffff85fa44a4 RSP=ffff88801810f7c0 R8 =ffffffff863b252e R9 =ffff88801810f8b8 R10=0000000000038001 R11=000000000008a6b1 R12=ffffffff85fa44a4 R13=ffffffff85fa4488 R14=ffffffff85fa44a0 R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 00007fe47c59e900 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=00007fe47cb560b0 CR3=000000000eee2000 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