syzkaller login: [ 31.047906] BUG: Bad rss-counter state mm:0000000065b00a14 type:MM_FILEPAGES val:33 [ 31.049552] BUG: Bad rss-counter state mm:0000000065b00a14 type:MM_ANONPAGES val:22 [ 31.212951] ================================================================== [ 31.214183] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.215546] Read of size 8 at addr ffff88800fdc9df0 by task sshd/220 [ 31.216522] [ 31.216778] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.217740] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.218789] Call Trace: [ 31.219133] [ 31.219438] dump_stack_lvl+0x91/0xf0 [ 31.219970] print_report+0xcc/0x620 [ 31.220492] ? __virt_addr_valid+0x102/0x340 [ 31.221115] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221784] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.222452] kasan_report+0xbe/0xf0 [ 31.222963] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.223626] vma_interval_tree_remove+0xc75/0xec0 [ 31.224284] vma_prepare+0xc54/0x11a0 [ 31.224826] __split_vma+0x5af/0x950 [ 31.225338] ? __pfx___split_vma+0x10/0x10 [ 31.225909] ? find_held_lock+0x2c/0x110 [ 31.226469] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.227083] ? lock_is_held_type+0x9f/0x120 [ 31.227668] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.228334] ? mtree_range_walk+0x632/0x900 [ 31.228944] ? mas_walk+0x5c7/0x7c0 [ 31.229459] do_vmi_munmap+0x1f1/0x2b0 [ 31.229994] mmap_region+0x1f9/0x2660 [ 31.230527] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.231084] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.231869] ? __pfx_lock_acquire+0x10/0x10 [ 31.232448] ? __pfx_mmap_region+0x10/0x10 [ 31.233041] ? security_mmap_addr+0x7d/0xa0 [ 31.233614] ? get_unmapped_area+0x1f5/0x3f0 [ 31.234213] do_mmap+0x854/0xf00 [ 31.234684] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.235226] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.235837] ksys_mmap_pgoff+0x3af/0x500 [ 31.236399] do_syscall_64+0x3f/0x90 [ 31.236938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237646] RIP: 0033:0x7f1351730d82 [ 31.238141] 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 [ 31.240485] RSP: 002b:00007ffc4be79c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.241470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1351730d82 [ 31.242393] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1350b6a000 [ 31.243304] RBP: 00007f1350b6a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.244241] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2e1edef60 [ 31.245177] R13: 00007ffc4be79c30 R14: 00007ffc4be79c60 R15: 00007ffc4be79fc0 [ 31.246125] [ 31.246449] [ 31.246687] Allocated by task 213: [ 31.247171] kasan_save_stack+0x22/0x50 [ 31.247722] kasan_set_track+0x25/0x30 [ 31.248258] __kasan_slab_alloc+0x59/0x70 [ 31.248838] kmem_cache_alloc+0x16b/0x370 [ 31.249395] vm_area_dup+0x20/0x160 [ 31.249889] __split_vma+0x170/0x950 [ 31.250391] split_vma+0xc6/0x110 [ 31.250867] mprotect_fixup+0x8d2/0xb30 [ 31.251413] do_mprotect_pkey+0x87e/0xd40 [ 31.251976] __x64_sys_mprotect+0x78/0xc0 [ 31.252557] do_syscall_64+0x3f/0x90 [ 31.253075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.253773] [ 31.254004] Freed by task 204: [ 31.254422] kasan_save_stack+0x22/0x50 [ 31.254970] kasan_set_track+0x25/0x30 [ 31.255507] kasan_save_free_info+0x2b/0x50 [ 31.256086] __kasan_slab_free+0x10a/0x190 [ 31.256675] kmem_cache_free+0x10d/0x4d0 [ 31.257221] rcu_core+0x8c8/0x2860 [ 31.257705] __do_softirq+0x1b7/0x7d4 [ 31.258222] [ 31.258455] Last potentially related work creation: [ 31.259091] kasan_save_stack+0x22/0x50 [ 31.259638] __kasan_record_aux_stack+0x8e/0xa0 [ 31.260253] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.260959] remove_vma+0x139/0x170 [ 31.261445] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.262045] do_vmi_munmap+0x1f1/0x2b0 [ 31.262573] __vm_munmap+0x138/0x3a0 [ 31.263077] __x64_sys_munmap+0x59/0x80 [ 31.263619] do_syscall_64+0x3f/0x90 [ 31.264132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264841] [ 31.265073] The buggy address belongs to the object at ffff88800fdc9d98 [ 31.265073] which belongs to the cache vm_area_struct of size 168 [ 31.266651] The buggy address is located 88 bytes inside of [ 31.266651] freed 168-byte region [ffff88800fdc9d98, ffff88800fdc9e40) [ 31.268168] [ 31.268404] The buggy address belongs to the physical page: [ 31.269118] page:0000000030f939a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdc9 [ 31.270284] memcg:ffff888016a0c901 [ 31.270741] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.271499] page_type: 0xffffffff() [ 31.271987] raw: 0100000000000200 ffff8880087a0c80 ffffea0000391340 dead000000000003 [ 31.272994] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a0c901 [ 31.273966] page dumped because: kasan: bad access detected [ 31.274676] [ 31.274909] Memory state around the buggy address: [ 31.275534] ffff88800fdc9c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.276464] ffff88800fdc9d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.277413] >ffff88800fdc9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.278341] ^ [ 31.279220] ffff88800fdc9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.280136] ffff88800fdc9e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.281072] ================================================================== [ 31.282159] Disabling lock debugging due to kernel taint [ 33.460204] BUG: Bad rss-counter state mm:000000002142adca type:MM_FILEPAGES val:33 [ 33.461437] BUG: Bad rss-counter state mm:000000002142adca type:MM_ANONPAGES val:22 [ 33.830124] BUG: Bad rss-counter state mm:000000006ac5590d type:MM_FILEPAGES val:33 [ 33.831139] BUG: Bad rss-counter state mm:000000006ac5590d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8409' (ECDSA) to the list of known hosts. 2023/06/20 23:42:38 fuzzer started 2023/06/20 23:42:39 dialing manager at localhost:36067 2023/06/20 23:42:39 checking machine... 2023/06/20 23:42:39 checking revisions... [ 34.514003] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:42:39 testing simple program... [ 34.557342] cgroup: Unknown subsys name 'net' [ 34.603244] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:42:38 Registers: info registers vcpu 0 RAX=1ffff11001c33769 RBX=ffff88800e19bb18 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e19bb48 RBP=ffff8880093f6dd0 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff8880094017e8 R14=ffffffff813782f8 R15=ffff8880094017e8 RIP=ffffffff818464e2 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 00007fc128a7d900 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=00007fc127eee880 CR3=000000000c44c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=21d59cf371a656ff00000000000ae988 XMM05=2721a8e223e465e100000000001322a0 XMM06=4fda316b135da52b0000000000130d20 XMM07=fb795ef6d65770560000000000120fa0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff818088f7 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001d06f51 RSI=ffff88800e837c80 RDI=ffffffff818088f7 RBP=ffff88800e837ac8 RSP=ffff88800e837a30 R8 =0000000000000001 R9 =ffff88800e837a70 R10=0000000000038001 R11=0000000000021eef R12=ffff88800e837af8 R13=0000000000000000 R14=ffff888017da3680 R15=ffff88800fd0b260 RIP=ffffffff810bd06d 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 00007ffa478a5900 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=00007ffa47e5c618 CR3=000000000e664000 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