syzkaller login: [ 31.046950] BUG: Bad rss-counter state mm:000000001c87a5e9 type:MM_FILEPAGES val:33 [ 31.047969] BUG: Bad rss-counter state mm:000000001c87a5e9 type:MM_ANONPAGES val:22 [ 31.207544] ================================================================== [ 31.208452] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.209409] Read of size 8 at addr ffff888015e60058 by task sshd/219 [ 31.210183] [ 31.210549] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.211420] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.212405] Call Trace: [ 31.212818] [ 31.213139] dump_stack_lvl+0x91/0xf0 [ 31.213639] print_report+0xcc/0x620 [ 31.214115] ? __virt_addr_valid+0x102/0x340 [ 31.214668] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.215293] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.215918] kasan_report+0xbe/0xf0 [ 31.216395] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217033] vma_interval_tree_remove+0xc75/0xec0 [ 31.217646] vma_prepare+0xc54/0x11a0 [ 31.218222] __split_vma+0x5af/0x950 [ 31.218797] ? __pfx___split_vma+0x10/0x10 [ 31.219447] ? find_held_lock+0x2c/0x110 [ 31.220082] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.220774] ? lock_is_held_type+0x9f/0x120 [ 31.221462] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.222123] ? mtree_range_walk+0x632/0x900 [ 31.222675] ? mas_walk+0x5c7/0x7c0 [ 31.223151] do_vmi_munmap+0x1f1/0x2b0 [ 31.223647] mmap_region+0x1f9/0x2660 [ 31.224126] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.224635] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.225370] ? __pfx_lock_acquire+0x10/0x10 [ 31.225908] ? __pfx_mmap_region+0x10/0x10 [ 31.226435] ? security_mmap_addr+0x7d/0xa0 [ 31.226968] ? get_unmapped_area+0x1f5/0x3f0 [ 31.227524] do_mmap+0x854/0xf00 [ 31.227960] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.228452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.229024] ksys_mmap_pgoff+0x3af/0x500 [ 31.229540] do_syscall_64+0x3f/0x90 [ 31.230023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.230684] RIP: 0033:0x7f5fc590bd82 [ 31.231148] 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 [ 31.233312] RSP: 002b:00007fff57907d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.234223] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5fc590bd82 [ 31.235081] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5fc4d45000 [ 31.235947] RBP: 00007f5fc4d45000 R08: 0000000000000009 R09: 0000000000001000 [ 31.236803] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca4f56bec0 [ 31.237656] R13: 00007fff57907d40 R14: 00007fff57907d70 R15: 00007fff579080d0 [ 31.238535] [ 31.238832] [ 31.239053] Allocated by task 212: [ 31.239496] kasan_save_stack+0x22/0x50 [ 31.240007] kasan_set_track+0x25/0x30 [ 31.240502] __kasan_slab_alloc+0x59/0x70 [ 31.241036] kmem_cache_alloc+0x16b/0x370 [ 31.241554] vm_area_dup+0x20/0x160 [ 31.242013] __split_vma+0x170/0x950 [ 31.242482] split_vma+0xc6/0x110 [ 31.242918] mprotect_fixup+0x8d2/0xb30 [ 31.243419] do_mprotect_pkey+0x87e/0xd40 [ 31.243938] __x64_sys_mprotect+0x78/0xc0 [ 31.244465] do_syscall_64+0x3f/0x90 [ 31.244942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245605] [ 31.245825] Freed by task 212: [ 31.246229] kasan_save_stack+0x22/0x50 [ 31.246729] kasan_set_track+0x25/0x30 [ 31.247227] kasan_save_free_info+0x2b/0x50 [ 31.247757] __kasan_slab_free+0x10a/0x190 [ 31.248287] kmem_cache_free+0x10d/0x4d0 [ 31.248804] rcu_core+0x8c8/0x2860 [ 31.249263] __do_softirq+0x1b7/0x7d4 [ 31.249739] [ 31.249957] Last potentially related work creation: [ 31.250548] kasan_save_stack+0x22/0x50 [ 31.251049] __kasan_record_aux_stack+0x8e/0xa0 [ 31.251627] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.252271] remove_vma+0x139/0x170 [ 31.252728] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.253310] do_vmi_munmap+0x1f1/0x2b0 [ 31.253803] __vm_munmap+0x138/0x3a0 [ 31.254274] __x64_sys_munmap+0x59/0x80 [ 31.254785] do_syscall_64+0x3f/0x90 [ 31.255348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.256023] [ 31.256242] The buggy address belongs to the object at ffff888015e60000 [ 31.256242] which belongs to the cache vm_area_struct of size 168 [ 31.257741] The buggy address is located 88 bytes inside of [ 31.257741] freed 168-byte region [ffff888015e60000, ffff888015e600a8) [ 31.259167] [ 31.259383] The buggy address belongs to the physical page: [ 31.260086] page:000000001dfcd107 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e60 [ 31.261222] memcg:ffff8880166f5501 [ 31.261655] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.262311] page_type: 0xffffffff() [ 31.262776] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.263705] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166f5501 [ 31.264617] page dumped because: kasan: bad access detected [ 31.265307] [ 31.265523] Memory state around the buggy address: [ 31.266108] ffff888015e5ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.266971] ffff888015e5ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.267841] >ffff888015e60000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.268701] ^ [ 31.269471] ffff888015e60080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.270343] ffff888015e60100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.271192] ================================================================== [ 31.272437] Disabling lock debugging due to kernel taint [ 33.804190] BUG: Bad rss-counter state mm:000000009ceacecd type:MM_FILEPAGES val:33 [ 33.805253] BUG: Bad rss-counter state mm:000000009ceacecd type:MM_ANONPAGES val:22 [ 34.380469] BUG: Bad rss-counter state mm:00000000eee18525 type:MM_FILEPAGES val:33 [ 34.381521] BUG: Bad rss-counter state mm:00000000eee18525 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62724' (ECDSA) to the list of known hosts. 2023/06/20 21:07:33 fuzzer started 2023/06/20 21:07:34 dialing manager at localhost:36067 2023/06/20 21:07:34 checking machine... 2023/06/20 21:07:34 checking revisions... [ 35.014656] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:07:34 testing simple program... [ 35.061557] cgroup: Unknown subsys name 'net' [ 35.098886] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:07:33 Registers: info registers vcpu 0 RAX=ffff888009eb6060 RBX=ffff888009eb6000 RCX=0000000000000000 RDX=1ffff11002c8a800 RSI=ffffffff8164fcd6 RDI=ffff8880146f0018 RBP=0000000000000000 RSP=ffff888014757b60 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff8880146f0000 R14=ffff888016454000 R15=ffff888014723680 RIP=ffffffff814c0860 RFL=00000206 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fce35c85900 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=00007fce350fcfd0 CR3=0000000010226000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8f6265f56d13f1c800000000000ae988 XMM05=389f0883deaf66230000000000132730 XMM06=806171799158d9670000000000131520 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800db9d000 RCX=ffffffff8386035b RDX=ffffed1001b73a43 RSI=0000000000000004 RDI=ffff88800db9d210 RBP=ffff88801682db40 RSP=ffff88801c997800 R8 =0000000000000001 R9 =ffffed1001b73a42 R10=ffff88800db9d213 R11=00000000000b6a61 R12=ffff88801682dc18 R13=0000000000002100 R14=ffff88800db9d210 R15=ffff88800db9d600 RIP=ffffffff83860363 RFL=00000206 [-----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 00007fd73a927900 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=00007fd73aede618 CR3=0000000016bc0000 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