syzkaller login: [ 31.166702] BUG: Bad rss-counter state mm:000000007bbbf4f1 type:MM_FILEPAGES val:33 [ 31.167948] BUG: Bad rss-counter state mm:000000007bbbf4f1 type:MM_ANONPAGES val:22 [ 31.212476] ================================================================== [ 31.213425] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.214538] Read of size 8 at addr ffff888015e6f5c8 by task sshd/221 [ 31.215409] [ 31.215642] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.216616] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.217784] Call Trace: [ 31.218106] [ 31.218418] dump_stack_lvl+0x91/0xf0 [ 31.218962] print_report+0xcc/0x620 [ 31.219544] ? __virt_addr_valid+0x102/0x340 [ 31.220395] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221217] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221978] kasan_report+0xbe/0xf0 [ 31.222544] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.223282] vma_interval_tree_remove+0xc75/0xec0 [ 31.224013] vma_prepare+0xc54/0x11a0 [ 31.224579] __split_vma+0x5af/0x950 [ 31.225143] ? __pfx___split_vma+0x10/0x10 [ 31.225773] ? find_held_lock+0x2c/0x110 [ 31.226396] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.227071] ? lock_is_held_type+0x9f/0x120 [ 31.227723] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.228444] ? mtree_range_walk+0x632/0x900 [ 31.229115] ? mas_walk+0x5c7/0x7c0 [ 31.229678] do_vmi_munmap+0x1f1/0x2b0 [ 31.230274] mmap_region+0x1f9/0x2660 [ 31.230848] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.231514] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.232308] ? __pfx_lock_acquire+0x10/0x10 [ 31.232836] ? __pfx_mmap_region+0x10/0x10 [ 31.233370] ? security_mmap_addr+0x7d/0xa0 [ 31.233902] ? get_unmapped_area+0x1f5/0x3f0 [ 31.234459] do_mmap+0x854/0xf00 [ 31.234902] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.235399] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.235973] ksys_mmap_pgoff+0x3af/0x500 [ 31.236486] do_syscall_64+0x3f/0x90 [ 31.236973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237616] RIP: 0033:0x7fc6d70f4d82 [ 31.238076] 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 [ 31.240250] RSP: 002b:00007ffd7d8cdca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.241163] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6d70f4d82 [ 31.242022] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6d652e000 [ 31.242885] RBP: 00007fc6d652e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.243768] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb3f617b20 [ 31.244623] R13: 00007ffd7d8cdcc0 R14: 00007ffd7d8cdcf0 R15: 00007ffd7d8ce050 [ 31.245492] [ 31.245794] [ 31.246010] Allocated by task 214: [ 31.246447] kasan_save_stack+0x22/0x50 [ 31.246955] kasan_set_track+0x25/0x30 [ 31.247454] __kasan_slab_alloc+0x59/0x70 [ 31.247979] kmem_cache_alloc+0x16b/0x370 [ 31.248497] vm_area_dup+0x20/0x160 [ 31.248954] __split_vma+0x170/0x950 [ 31.249429] split_vma+0xc6/0x110 [ 31.249870] mprotect_fixup+0x8d2/0xb30 [ 31.250377] do_mprotect_pkey+0x87e/0xd40 [ 31.250898] __x64_sys_mprotect+0x78/0xc0 [ 31.251441] do_syscall_64+0x3f/0x90 [ 31.251917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.252560] [ 31.252773] Freed by task 214: [ 31.253223] kasan_save_stack+0x22/0x50 [ 31.253734] kasan_set_track+0x25/0x30 [ 31.254241] kasan_save_free_info+0x2b/0x50 [ 31.254773] __kasan_slab_free+0x10a/0x190 [ 31.255307] kmem_cache_free+0x10d/0x4d0 [ 31.255834] rcu_core+0x8c8/0x2860 [ 31.256282] __do_softirq+0x1b7/0x7d4 [ 31.256775] [ 31.256990] Last potentially related work creation: [ 31.257597] kasan_save_stack+0x22/0x50 [ 31.258105] __kasan_record_aux_stack+0x8e/0xa0 [ 31.258694] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.259347] remove_vma+0x139/0x170 [ 31.259819] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.260380] do_vmi_munmap+0x1f1/0x2b0 [ 31.260882] __vm_munmap+0x138/0x3a0 [ 31.261354] __x64_sys_munmap+0x59/0x80 [ 31.261858] do_syscall_64+0x3f/0x90 [ 31.262348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.263000] [ 31.263222] The buggy address belongs to the object at ffff888015e6f570 [ 31.263222] which belongs to the cache vm_area_struct of size 168 [ 31.264736] The buggy address is located 88 bytes inside of [ 31.264736] freed 168-byte region [ffff888015e6f570, ffff888015e6f618) [ 31.266141] [ 31.266360] The buggy address belongs to the physical page: [ 31.267019] page:00000000d7246f05 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e6f [ 31.268121] memcg:ffff888016bb2701 [ 31.268550] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.269197] page_type: 0xffffffff() [ 31.269646] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.270566] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bb2701 [ 31.271494] page dumped because: kasan: bad access detected [ 31.272154] [ 31.272370] Memory state around the buggy address: [ 31.272949] ffff888015e6f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.273813] ffff888015e6f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.274689] >ffff888015e6f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.275553] ^ [ 31.276229] ffff888015e6f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.277103] ffff888015e6f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.277977] ================================================================== [ 31.278999] Disabling lock debugging due to kernel taint [ 33.913572] BUG: Bad rss-counter state mm:000000007c76e263 type:MM_FILEPAGES val:33 [ 33.914550] BUG: Bad rss-counter state mm:000000007c76e263 type:MM_ANONPAGES val:22 [ 34.301496] BUG: Bad rss-counter state mm:00000000b73712e2 type:MM_FILEPAGES val:33 [ 34.302481] BUG: Bad rss-counter state mm:00000000b73712e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50832' (ECDSA) to the list of known hosts. 2023/06/21 04:23:37 fuzzer started 2023/06/21 04:23:37 dialing manager at localhost:36067 2023/06/21 04:23:37 checking machine... 2023/06/21 04:23:37 checking revisions... [ 35.009045] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:23:37 testing simple program... [ 35.053141] cgroup: Unknown subsys name 'net' [ 35.091754] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:23:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000200 RCX=ffffffff813c9bf3 RDX=ffff88801875d1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff888016837ed0 RSP=ffff888016837e20 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000200 R11=0000000000000000 R12=0000000000000000 R13=000000001dcd6500 R14=1ffff11002d06fda R15=dffffc0000000000 RIP=ffffffff814c02c5 RFL=00000093 [--S-A-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 00007f495ddb8900 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=00007ffd39458000 CR3=000000001cdea000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88801b846940 RCX=ffffffff844f43f4 RDX=ffffed1003708d70 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88800f437030 R8 =0000000000000001 R9 =ffffed1003708d6f R10=ffff88801b846b7f R11=0000000000009293 R12=ffff88801b846b78 R13=dffffc0000000000 R14=ffff88800f4370d8 R15=0000000000000001 RIP=ffffffff814c03a8 RFL=00000046 [---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 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=00007f495dc87000 CR3=000000001cdea000 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=7c6bcec0bb439a71dbbec9888262dbb3 XMM02=2eff386134659ca9aabaf9f986e7603d XMM03=26ccb626ed0ac9e5efcef01ce2c44064 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000