syzkaller login: [ 30.997668] BUG: Bad rss-counter state mm:000000003b5cd01d type:MM_FILEPAGES val:33 [ 30.999030] BUG: Bad rss-counter state mm:000000003b5cd01d type:MM_ANONPAGES val:22 [ 31.148081] ================================================================== [ 31.148932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.149810] Read of size 8 at addr ffff88801786a880 by task sshd/220 [ 31.150546] [ 31.150756] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.151675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.152581] Call Trace: [ 31.152885] [ 31.153171] dump_stack_lvl+0x91/0xf0 [ 31.153638] print_report+0xcc/0x620 [ 31.154118] ? __virt_addr_valid+0x102/0x340 [ 31.154643] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.155223] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.155801] kasan_report+0xbe/0xf0 [ 31.156252] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.156837] vma_interval_tree_remove+0xc75/0xec0 [ 31.157406] vma_prepare+0xc54/0x11a0 [ 31.157857] __split_vma+0x5af/0x950 [ 31.158310] ? __pfx___split_vma+0x10/0x10 [ 31.158811] ? find_held_lock+0x2c/0x110 [ 31.159307] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.159842] ? lock_is_held_type+0x9f/0x120 [ 31.160355] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.160925] ? mtree_range_walk+0x632/0x900 [ 31.161447] ? mas_walk+0x5c7/0x7c0 [ 31.161897] do_vmi_munmap+0x1f1/0x2b0 [ 31.162371] mmap_region+0x1f9/0x2660 [ 31.162832] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.163336] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.164050] ? __pfx_lock_acquire+0x10/0x10 [ 31.164581] ? __pfx_mmap_region+0x10/0x10 [ 31.165107] ? security_mmap_addr+0x7d/0xa0 [ 31.165633] ? get_unmapped_area+0x1f5/0x3f0 [ 31.166213] do_mmap+0x854/0xf00 [ 31.166646] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.167133] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.167692] ksys_mmap_pgoff+0x3af/0x500 [ 31.168198] do_syscall_64+0x3f/0x90 [ 31.168659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.169304] RIP: 0033:0x7f2de22ccd82 [ 31.169759] 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 [ 31.171863] RSP: 002b:00007ffcccb7c098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.172752] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2de22ccd82 [ 31.173589] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2de1706000 [ 31.174449] RBP: 00007f2de1706000 R08: 0000000000000009 R09: 0000000000001000 [ 31.175298] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd48865b20 [ 31.176132] R13: 00007ffcccb7c0b0 R14: 00007ffcccb7c0e0 R15: 00007ffcccb7c440 [ 31.176981] [ 31.177264] [ 31.177474] Allocated by task 213: [ 31.177907] kasan_save_stack+0x22/0x50 [ 31.178404] kasan_set_track+0x25/0x30 [ 31.178897] __kasan_slab_alloc+0x59/0x70 [ 31.179414] kmem_cache_alloc+0x16b/0x370 [ 31.179930] vm_area_dup+0x20/0x160 [ 31.180490] __split_vma+0x170/0x950 [ 31.180957] split_vma+0xc6/0x110 [ 31.181402] mprotect_fixup+0x8d2/0xb30 [ 31.181909] do_mprotect_pkey+0x87e/0xd40 [ 31.182657] __x64_sys_mprotect+0x78/0xc0 [ 31.183369] do_syscall_64+0x3f/0x90 [ 31.183878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.184544] [ 31.184765] Freed by task 213: [ 31.185188] kasan_save_stack+0x22/0x50 [ 31.185687] kasan_set_track+0x25/0x30 [ 31.186221] kasan_save_free_info+0x2b/0x50 [ 31.186752] __kasan_slab_free+0x10a/0x190 [ 31.187329] kmem_cache_free+0x10d/0x4d0 [ 31.187853] rcu_core+0x8c8/0x2860 [ 31.188338] __do_softirq+0x1b7/0x7d4 [ 31.188832] [ 31.189088] Last potentially related work creation: [ 31.189684] kasan_save_stack+0x22/0x50 [ 31.190255] __kasan_record_aux_stack+0x8e/0xa0 [ 31.190845] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.191502] remove_vma+0x139/0x170 [ 31.191984] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.192556] do_vmi_munmap+0x1f1/0x2b0 [ 31.193067] __vm_munmap+0x138/0x3a0 [ 31.193533] __x64_sys_munmap+0x59/0x80 [ 31.194094] do_syscall_64+0x3f/0x90 [ 31.194570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.195253] [ 31.195469] The buggy address belongs to the object at ffff88801786a828 [ 31.195469] which belongs to the cache vm_area_struct of size 168 [ 31.196923] The buggy address is located 88 bytes inside of [ 31.196923] freed 168-byte region [ffff88801786a828, ffff88801786a8d0) [ 31.198340] [ 31.198559] The buggy address belongs to the physical page: [ 31.199223] page:0000000002f29ea6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1786a [ 31.200324] memcg:ffff888019c76c01 [ 31.200750] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.201388] page_type: 0xffffffff() [ 31.201835] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.202761] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c76c01 [ 31.203655] page dumped because: kasan: bad access detected [ 31.204316] [ 31.204538] Memory state around the buggy address: [ 31.205121] ffff88801786a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.205966] ffff88801786a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.206841] >ffff88801786a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.207681] ^ [ 31.208079] ffff88801786a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.208930] ffff88801786a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.209766] ================================================================== [ 31.210754] Disabling lock debugging due to kernel taint [ 33.032705] BUG: Bad rss-counter state mm:0000000032d6e9d6 type:MM_FILEPAGES val:33 [ 33.033586] BUG: Bad rss-counter state mm:0000000032d6e9d6 type:MM_ANONPAGES val:22 [ 33.461563] BUG: Bad rss-counter state mm:0000000082219b57 type:MM_FILEPAGES val:33 [ 33.462455] BUG: Bad rss-counter state mm:0000000082219b57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39862' (ECDSA) to the list of known hosts. 2023/06/20 11:07:56 fuzzer started 2023/06/20 11:07:56 dialing manager at localhost:36067 2023/06/20 11:07:56 checking machine... 2023/06/20 11:07:56 checking revisions... [ 34.162845] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:07:56 testing simple program... [ 34.202999] cgroup: Unknown subsys name 'net' [ 34.239996] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:07:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad720 RCX=ffff88806ce09b38 RDX=1ffff1100d9c135e RSI=ffff88806ce09b30 RDI=ffffffff813ad720 RBP=ffffffff813ad720 RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000001 R13=0000000000000000 R14=ffff888015c09b40 R15=ffff888009a7e380 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 00007f56136a1900 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=00007fad61319650 CR3=000000000d86c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5875ade8f34c4e1f00000000000ae988 XMM05=6d69034fd9882d200000000000133d60 XMM06=19e9129bd510f2350000000000132bf8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002178d11 RBX=ffff888017969488 RCX=0000000000000000 RDX=ffff888015e31b40 RSI=ffffffff81452212 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff888016b57cf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888010bc6800 R13=ffff888015e31b40 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff81452227 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 00007fad60d64900 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=00007fad6131b618 CR3=000000000c9c2000 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=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