syzkaller login: [ 32.827424] BUG: Bad rss-counter state mm:000000001dbb4d64 type:MM_FILEPAGES val:33 [ 32.829151] BUG: Bad rss-counter state mm:000000001dbb4d64 type:MM_ANONPAGES val:22 [ 32.998760] ================================================================== [ 32.999783] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.000840] Read of size 8 at addr ffff888010339058 by task sshd/220 [ 33.001772] [ 33.002017] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.003017] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.004142] Call Trace: [ 33.004503] [ 33.004820] dump_stack_lvl+0x91/0xf0 [ 33.005355] print_report+0xcc/0x620 [ 33.005905] ? __virt_addr_valid+0x102/0x340 [ 33.006509] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.007133] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.007763] kasan_report+0xbe/0xf0 [ 33.008272] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.008921] vma_interval_tree_remove+0xc75/0xec0 [ 33.009538] vma_prepare+0xc54/0x11a0 [ 33.010036] __split_vma+0x5af/0x950 [ 33.010543] ? __pfx___split_vma+0x10/0x10 [ 33.011097] ? find_held_lock+0x2c/0x110 [ 33.011649] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.012242] ? lock_is_held_type+0x9f/0x120 [ 33.012797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.013430] ? mtree_range_walk+0x632/0x900 [ 33.014006] ? mas_walk+0x5c7/0x7c0 [ 33.014497] do_vmi_munmap+0x1f1/0x2b0 [ 33.015007] mmap_region+0x1f9/0x2660 [ 33.015512] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.016069] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.016816] ? __pfx_lock_acquire+0x10/0x10 [ 33.017377] ? __pfx_mmap_region+0x10/0x10 [ 33.017930] ? security_mmap_addr+0x7d/0xa0 [ 33.018482] ? get_unmapped_area+0x1f5/0x3f0 [ 33.019060] do_mmap+0x854/0xf00 [ 33.019508] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.020028] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.020607] ksys_mmap_pgoff+0x3af/0x500 [ 33.021124] do_syscall_64+0x3f/0x90 [ 33.021631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.022283] RIP: 0033:0x7f0962556d82 [ 33.022743] 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 [ 33.024926] RSP: 002b:00007ffe188a0e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.025838] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0962556d82 [ 33.026693] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0961990000 [ 33.027550] RBP: 00007f0961990000 R08: 0000000000000009 R09: 0000000000001000 [ 33.028423] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ec3d86ec0 [ 33.029303] R13: 00007ffe188a0e40 R14: 00007ffe188a0e70 R15: 00007ffe188a11d0 [ 33.030165] [ 33.030466] [ 33.030684] Allocated by task 213: [ 33.031109] kasan_save_stack+0x22/0x50 [ 33.031610] kasan_set_track+0x25/0x30 [ 33.032123] __kasan_slab_alloc+0x59/0x70 [ 33.032655] kmem_cache_alloc+0x16b/0x370 [ 33.033178] vm_area_dup+0x20/0x160 [ 33.033641] __split_vma+0x170/0x950 [ 33.034121] split_vma+0xc6/0x110 [ 33.034575] mprotect_fixup+0x8d2/0xb30 [ 33.035096] do_mprotect_pkey+0x87e/0xd40 [ 33.035627] __x64_sys_mprotect+0x78/0xc0 [ 33.036185] do_syscall_64+0x3f/0x90 [ 33.036669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.037320] [ 33.037544] Freed by task 213: [ 33.037952] kasan_save_stack+0x22/0x50 [ 33.038466] kasan_set_track+0x25/0x30 [ 33.038960] kasan_save_free_info+0x2b/0x50 [ 33.039501] __kasan_slab_free+0x10a/0x190 [ 33.040043] kmem_cache_free+0x10d/0x4d0 [ 33.040572] rcu_core+0x8c8/0x2860 [ 33.041033] __do_softirq+0x1b7/0x7d4 [ 33.041514] [ 33.041730] Last potentially related work creation: [ 33.042325] kasan_save_stack+0x22/0x50 [ 33.042829] __kasan_record_aux_stack+0x8e/0xa0 [ 33.043420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.044095] remove_vma+0x139/0x170 [ 33.044550] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.045118] do_vmi_munmap+0x1f1/0x2b0 [ 33.045615] __vm_munmap+0x138/0x3a0 [ 33.046095] __x64_sys_munmap+0x59/0x80 [ 33.046607] do_syscall_64+0x3f/0x90 [ 33.047095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.047739] [ 33.047961] The buggy address belongs to the object at ffff888010339000 [ 33.047961] which belongs to the cache vm_area_struct of size 168 [ 33.049466] The buggy address is located 88 bytes inside of [ 33.049466] freed 168-byte region [ffff888010339000, ffff8880103390a8) [ 33.050899] [ 33.051123] The buggy address belongs to the physical page: [ 33.051790] page:000000005332aa24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10339 [ 33.052894] memcg:ffff8880158dae01 [ 33.053320] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.053963] page_type: 0xffffffff() [ 33.054417] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.055346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880158dae01 [ 33.056273] page dumped because: kasan: bad access detected [ 33.056939] [ 33.057157] Memory state around the buggy address: [ 33.057740] ffff888010338f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 33.058600] ffff888010338f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.059466] >ffff888010339000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.060350] ^ [ 33.061092] ffff888010339080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.061986] ffff888010339100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.062862] ================================================================== [ 33.063848] Disabling lock debugging due to kernel taint [ 35.050546] BUG: Bad rss-counter state mm:000000005d490147 type:MM_FILEPAGES val:33 [ 35.051707] BUG: Bad rss-counter state mm:000000005d490147 type:MM_ANONPAGES val:22 [ 35.518265] BUG: Bad rss-counter state mm:00000000b65aae99 type:MM_FILEPAGES val:33 [ 35.519265] BUG: Bad rss-counter state mm:00000000b65aae99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37898' (ECDSA) to the list of known hosts. 2023/06/19 14:46:20 fuzzer started 2023/06/19 14:46:21 dialing manager at localhost:44161 2023/06/19 14:46:21 checking machine... 2023/06/19 14:46:21 checking revisions... [ 36.250409] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:46:21 testing simple program... [ 36.312016] cgroup: Unknown subsys name 'net' [ 36.366580] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:46:19 Registers: info registers vcpu 0 RAX=0000000000020d8a RBX=0000000000000001 RCX=ffffffff8180c521 RDX=0000000000020d9a RSI=00000000000080c5 RDI=ffffffff86507ed8 RBP=ffff88801a007920 RSP=ffff88801a007858 R8 =0000000000000000 R9 =ffff88801a007908 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801a007928 R13=ffff88801a007910 R14=ffff88801a007909 R15=ffff88801a0078c8 RIP=ffffffff81130837 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 00007eff75ef7900 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=00007eff764ae618 CR3=000000000fd7c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff110028e3eeb RCX=ffffffff812e0423 RDX=dffffc0000000000 RSI=0000000000000004 RDI=ffff88800ff0a450 RBP=ffff888019e0fb68 RSP=ffff88801471f758 R8 =0000000000000000 R9 =ffffed1001fe148a R10=ffff88800ff0a453 R11=0000000000000000 R12=00000000000000c3 R13=0000000000000001 R14=0000000000000010 R15=0000000000000001 RIP=ffffffff818bef64 RFL=00000082 [--S----] 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 00007f4e7b9fb900 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=00007f4e7ae02eb8 CR3=000000000d656000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=74264179b35a523200000000000ae988 XMM05=b34fd1d887f52a5900000000001353c8 XMM06=4fda316b135da52b00000000001341b8 XMM07=fb795ef6d65770560000000000124728 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000