syzkaller login: [ 31.196430] BUG: Bad rss-counter state mm:0000000018f9dd0b type:MM_FILEPAGES val:33 [ 31.197450] BUG: Bad rss-counter state mm:0000000018f9dd0b type:MM_ANONPAGES val:22 [ 31.379031] ================================================================== [ 31.380020] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.381017] Read of size 8 at addr ffff888016df55c8 by task sshd/219 [ 31.382008] [ 31.382240] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.383190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.384242] Call Trace: [ 31.384578] <TASK> [ 31.384879] dump_stack_lvl+0x91/0xf0 [ 31.385395] print_report+0xcc/0x620 [ 31.385910] ? __virt_addr_valid+0x102/0x340 [ 31.386503] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.387170] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.387829] kasan_report+0xbe/0xf0 [ 31.388336] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.388987] vma_interval_tree_remove+0xc75/0xec0 [ 31.389621] vma_prepare+0xc54/0x11a0 [ 31.390126] __split_vma+0x5af/0x950 [ 31.390626] ? __pfx___split_vma+0x10/0x10 [ 31.391208] ? find_held_lock+0x2c/0x110 [ 31.391765] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.392374] ? lock_is_held_type+0x9f/0x120 [ 31.392971] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.393641] ? mtree_range_walk+0x632/0x900 [ 31.394229] ? mas_walk+0x5c7/0x7c0 [ 31.394753] do_vmi_munmap+0x1f1/0x2b0 [ 31.395314] mmap_region+0x1f9/0x2660 [ 31.395839] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.396392] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.397157] ? __pfx_lock_acquire+0x10/0x10 [ 31.397724] ? __pfx_mmap_region+0x10/0x10 [ 31.398287] ? security_mmap_addr+0x7d/0xa0 [ 31.398856] ? get_unmapped_area+0x1f5/0x3f0 [ 31.399442] do_mmap+0x854/0xf00 [ 31.399912] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.400439] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.401039] ksys_mmap_pgoff+0x3af/0x500 [ 31.401618] do_syscall_64+0x3f/0x90 [ 31.402131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.402853] RIP: 0033:0x7fc9e3796d82 [ 31.403353] 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 [ 31.405667] RSP: 002b:00007ffe5850c988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.406625] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc9e3796d82 [ 31.407533] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc9e2bd0000 [ 31.408428] RBP: 00007fc9e2bd0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.409322] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9ce9e8ec0 [ 31.410217] R13: 00007ffe5850c9a0 R14: 00007ffe5850c9d0 R15: 00007ffe5850cd30 [ 31.411132] </TASK> [ 31.411452] [ 31.411690] Allocated by task 212: [ 31.412159] kasan_save_stack+0x22/0x50 [ 31.412716] kasan_set_track+0x25/0x30 [ 31.413269] __kasan_slab_alloc+0x59/0x70 [ 31.413846] kmem_cache_alloc+0x16b/0x370 [ 31.414420] vm_area_dup+0x20/0x160 [ 31.414940] __split_vma+0x170/0x950 [ 31.415455] split_vma+0xc6/0x110 [ 31.415940] mprotect_fixup+0x8d2/0xb30 [ 31.416497] do_mprotect_pkey+0x87e/0xd40 [ 31.417073] __x64_sys_mprotect+0x78/0xc0 [ 31.417657] do_syscall_64+0x3f/0x90 [ 31.418188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.418921] [ 31.419155] Freed by task 202: [ 31.419588] kasan_save_stack+0x22/0x50 [ 31.420146] kasan_set_track+0x25/0x30 [ 31.420705] kasan_save_free_info+0x2b/0x50 [ 31.421295] __kasan_slab_free+0x10a/0x190 [ 31.421886] kmem_cache_free+0x10d/0x4d0 [ 31.422447] rcu_core+0x8c8/0x2860 [ 31.422949] __do_softirq+0x1b7/0x7d4 [ 31.423537] [ 31.423782] Last potentially related work creation: [ 31.424419] kasan_save_stack+0x22/0x50 [ 31.424977] __kasan_record_aux_stack+0x8e/0xa0 [ 31.425614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.426319] remove_vma+0x139/0x170 [ 31.426832] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.427455] do_vmi_munmap+0x1f1/0x2b0 [ 31.427991] __vm_munmap+0x138/0x3a0 [ 31.428511] __x64_sys_munmap+0x59/0x80 [ 31.429059] do_syscall_64+0x3f/0x90 [ 31.429583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.430300] [ 31.430542] The buggy address belongs to the object at ffff888016df5570 [ 31.430542] which belongs to the cache vm_area_struct of size 168 [ 31.432176] The buggy address is located 88 bytes inside of [ 31.432176] freed 168-byte region [ffff888016df5570, ffff888016df5618) [ 31.433731] [ 31.433972] The buggy address belongs to the physical page: [ 31.434717] page:000000000ed35fbf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16df5 [ 31.435903] memcg:ffff88800eb5c901 [ 31.436360] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.437106] page_type: 0xffffffff() [ 31.437589] raw: 0100000000000200 ffff8880087a0c80 ffffea0000388200 dead000000000005 [ 31.438568] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb5c901 [ 31.439552] page dumped because: kasan: bad access detected [ 31.440253] [ 31.440483] Memory state around the buggy address: [ 31.441100] ffff888016df5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.442012] ffff888016df5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.442942] >ffff888016df5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.443844] ^ [ 31.444547] ffff888016df5600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.445455] ffff888016df5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.446396] ================================================================== [ 31.447433] Disabling lock debugging due to kernel taint [ 33.991707] BUG: Bad rss-counter state mm:000000005e3f64f9 type:MM_FILEPAGES val:33 [ 33.993203] BUG: Bad rss-counter state mm:000000005e3f64f9 type:MM_ANONPAGES val:22 [ 34.546838] BUG: Bad rss-counter state mm:000000009452edbc type:MM_FILEPAGES val:33 [ 34.548056] BUG: Bad rss-counter state mm:000000009452edbc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61011' (ECDSA) to the list of known hosts. 2023/06/20 16:39:19 fuzzer started 2023/06/20 16:39:19 dialing manager at localhost:36067 2023/06/20 16:39:19 checking machine... 2023/06/20 16:39:19 checking revisions... [ 35.143105] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:39:19 testing simple program... [ 35.201416] cgroup: Unknown subsys name 'net' [ 35.246472] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:39:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800fac3680 RSI=ffffffff816579a8 RDI=0000000000000007 RBP=ffffea00005c4f80 RSP=ffff88801478fcd8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=ffffea000014ee08 R13=000000001be8fa00 R14=ffff888013facae0 R15=0000000000000001 RIP=ffffffff814c0860 RFL=00000293 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fca57a01900 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=00007fca56f1f000 CR3=000000000cb2c000 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=000000000011af20b3285ca56c489dff XMM01=000000000011b138d59e07bde36eea69 XMM02=000000000011b260ec2efd57dc4c00df XMM03=0000000000121c38ed418403dce950a5 XMM04=b34894624a8a6ff800000000000ae988 XMM05=dfcdbad4f1609c370000000000131a10 XMM06=d397f1e53eddbf850000000000130878 XMM07=e042d86d42eb936e0000000000121eb8 XMM08=ed418403dce950a5000000000011b2c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001fb4f14 RCX=ffffffff818bf9c5 RDX=ffff88800eed3680 RSI=0000000000000000 RDI=0000000000000006 RBP=000000000000c350 RSP=ffff88800fda7890 R8 =0000000000000006 R9 =000000000000c350 R10=000000000007a11d R11=0000000000000000 R12=0000000000000064 R13=000000000007a11d R14=000000001dcd5cfb R15=00000000000f4240 RIP=ffffffff814c0860 RFL=00000297 [--S-APC] 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 00007f24835b9900 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=00007ffdfd5f1000 CR3=0000000015c96000 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=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