syzkaller login: [ 32.080393] BUG: Bad rss-counter state mm:0000000000a1d837 type:MM_FILEPAGES val:33 [ 32.081620] BUG: Bad rss-counter state mm:0000000000a1d837 type:MM_ANONPAGES val:22 [ 32.125020] ================================================================== [ 32.126129] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.127143] Read of size 8 at addr ffff888016e17798 by task sshd/222 [ 32.127998] [ 32.128217] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.129345] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.130410] Call Trace: [ 32.130782] [ 32.131086] dump_stack_lvl+0x91/0xf0 [ 32.131677] print_report+0xcc/0x620 [ 32.132210] ? __virt_addr_valid+0x102/0x340 [ 32.132780] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.133428] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.134050] kasan_report+0xbe/0xf0 [ 32.134531] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.135159] vma_interval_tree_remove+0xc75/0xec0 [ 32.135941] vma_prepare+0xc54/0x11a0 [ 32.136442] __split_vma+0x5af/0x950 [ 32.136917] ? __pfx___split_vma+0x10/0x10 [ 32.137452] ? find_held_lock+0x2c/0x110 [ 32.137994] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.138577] ? lock_is_held_type+0x9f/0x120 [ 32.139125] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.139747] ? mtree_range_walk+0x632/0x900 [ 32.140305] ? mas_walk+0x5c7/0x7c0 [ 32.140798] do_vmi_munmap+0x1f1/0x2b0 [ 32.141294] mmap_region+0x1f9/0x2660 [ 32.141792] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.142315] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.143036] ? __pfx_lock_acquire+0x10/0x10 [ 32.143585] ? __pfx_mmap_region+0x10/0x10 [ 32.144119] ? security_mmap_addr+0x7d/0xa0 [ 32.144672] ? get_unmapped_area+0x1f5/0x3f0 [ 32.145228] do_mmap+0x854/0xf00 [ 32.145677] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.146176] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.146751] ksys_mmap_pgoff+0x3af/0x500 [ 32.147262] do_syscall_64+0x3f/0x90 [ 32.147751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.148421] RIP: 0033:0x7f00085a2d82 [ 32.148878] 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 [ 32.151029] RSP: 002b:00007ffc0e217238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.151944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f00085a2d82 [ 32.152818] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f00079dc000 [ 32.153678] RBP: 00007f00079dc000 R08: 0000000000000009 R09: 0000000000001000 [ 32.154527] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563edcbfaf70 [ 32.155387] R13: 00007ffc0e217250 R14: 00007ffc0e217280 R15: 00007ffc0e2175e0 [ 32.156257] [ 32.156580] [ 32.156799] Allocated by task 215: [ 32.157231] kasan_save_stack+0x22/0x50 [ 32.157754] kasan_set_track+0x25/0x30 [ 32.158249] __kasan_slab_alloc+0x59/0x70 [ 32.158778] kmem_cache_alloc+0x16b/0x370 [ 32.159296] vm_area_dup+0x20/0x160 [ 32.159752] __split_vma+0x170/0x950 [ 32.160228] split_vma+0xc6/0x110 [ 32.160681] mprotect_fixup+0x8d2/0xb30 [ 32.161191] do_mprotect_pkey+0x87e/0xd40 [ 32.161722] __x64_sys_mprotect+0x78/0xc0 [ 32.162247] do_syscall_64+0x3f/0x90 [ 32.162726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.163378] [ 32.163602] Freed by task 215: [ 32.164000] kasan_save_stack+0x22/0x50 [ 32.164530] kasan_set_track+0x25/0x30 [ 32.165026] kasan_save_free_info+0x2b/0x50 [ 32.165560] __kasan_slab_free+0x10a/0x190 [ 32.166094] kmem_cache_free+0x10d/0x4d0 [ 32.166607] rcu_core+0x8c8/0x2860 [ 32.167045] __do_softirq+0x1b7/0x7d4 [ 32.167533] [ 32.167748] Last potentially related work creation: [ 32.168341] kasan_save_stack+0x22/0x50 [ 32.168849] __kasan_record_aux_stack+0x8e/0xa0 [ 32.169424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.170073] remove_vma+0x139/0x170 [ 32.170528] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.171095] do_vmi_munmap+0x1f1/0x2b0 [ 32.171588] __vm_munmap+0x138/0x3a0 [ 32.172055] __x64_sys_munmap+0x59/0x80 [ 32.172564] do_syscall_64+0x3f/0x90 [ 32.173046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.173704] [ 32.173926] The buggy address belongs to the object at ffff888016e17740 [ 32.173926] which belongs to the cache vm_area_struct of size 168 [ 32.175435] The buggy address is located 88 bytes inside of [ 32.175435] freed 168-byte region [ffff888016e17740, ffff888016e177e8) [ 32.176872] [ 32.177096] The buggy address belongs to the physical page: [ 32.177766] page:000000000f280854 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e17 [ 32.178880] memcg:ffff88801313e101 [ 32.179312] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.180035] page_type: 0xffffffff() [ 32.180508] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.181446] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801313e101 [ 32.182368] page dumped because: kasan: bad access detected [ 32.183052] [ 32.183273] Memory state around the buggy address: [ 32.183856] ffff888016e17680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.184772] ffff888016e17700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.185677] >ffff888016e17780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.186570] ^ [ 32.187094] ffff888016e17800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.188003] ffff888016e17880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.188928] ================================================================== [ 32.189891] Disabling lock debugging due to kernel taint [ 34.109677] BUG: Bad rss-counter state mm:00000000e7680d60 type:MM_FILEPAGES val:33 [ 34.110393] BUG: Bad rss-counter state mm:00000000e7680d60 type:MM_ANONPAGES val:22 [ 34.628797] BUG: Bad rss-counter state mm:0000000085ed002e type:MM_FILEPAGES val:33 [ 34.630021] BUG: Bad rss-counter state mm:0000000085ed002e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13209' (ECDSA) to the list of known hosts. 2023/06/20 15:06:03 fuzzer started 2023/06/20 15:06:03 dialing manager at localhost:36067 2023/06/20 15:06:03 checking machine... 2023/06/20 15:06:03 checking revisions... [ 35.325073] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:06:04 testing simple program... [ 35.378032] cgroup: Unknown subsys name 'net' [ 35.418030] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:06:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880193de7e8 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff8880193de7ec RBP=1ffff11002d9cf9f RSP=ffff888016ce7cf0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880193de7e8 R13=ffffffff818cf389 R14=00000000ffffffff R15=ffff888019171200 RIP=ffffffff812e004c RFL=00000216 [----AP-] 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 00007fd774795900 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=00007ffe268dd000 CR3=000000000df2e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007fd774d4c618 CR3=000000000e874000 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=2033303a36303a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a36303a3531203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000