syzkaller login: [ 39.063031] BUG: Bad rss-counter state mm:00000000c9ac3442 type:MM_FILEPAGES val:33 [ 39.064621] BUG: Bad rss-counter state mm:00000000c9ac3442 type:MM_ANONPAGES val:22 [ 39.225569] ================================================================== [ 39.226629] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.227848] Read of size 8 at addr ffff888016eeddf0 by task sshd/228 [ 39.228573] [ 39.228784] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.229621] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.230527] Call Trace: [ 39.230831] [ 39.231099] dump_stack_lvl+0x91/0xf0 [ 39.231561] print_report+0xcc/0x620 [ 39.232018] ? __virt_addr_valid+0x102/0x340 [ 39.232557] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.233137] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.233721] kasan_report+0xbe/0xf0 [ 39.234171] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.234759] vma_interval_tree_remove+0xc75/0xec0 [ 39.235361] vma_prepare+0xc54/0x11a0 [ 39.235841] __split_vma+0x5af/0x950 [ 39.236348] ? __pfx___split_vma+0x10/0x10 [ 39.236872] ? find_held_lock+0x2c/0x110 [ 39.237395] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.237959] ? lock_is_held_type+0x9f/0x120 [ 39.238500] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.239106] ? mtree_range_walk+0x632/0x900 [ 39.239656] ? mas_walk+0x5c7/0x7c0 [ 39.240135] do_vmi_munmap+0x1f1/0x2b0 [ 39.240631] mmap_region+0x1f9/0x2660 [ 39.241112] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.241618] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.242324] ? __pfx_lock_acquire+0x10/0x10 [ 39.242865] ? __pfx_mmap_region+0x10/0x10 [ 39.243398] ? security_mmap_addr+0x7d/0xa0 [ 39.243933] ? get_unmapped_area+0x1f5/0x3f0 [ 39.244478] do_mmap+0x854/0xf00 [ 39.244911] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.245406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.245959] ksys_mmap_pgoff+0x3af/0x500 [ 39.246463] do_syscall_64+0x3f/0x90 [ 39.246945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.247580] RIP: 0033:0x7ff8bd399d82 [ 39.248033] 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 [ 39.250158] RSP: 002b:00007ffd95269fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.251064] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8bd399d82 [ 39.251910] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8bc7d3000 [ 39.252767] RBP: 00007ff8bc7d3000 R08: 0000000000000009 R09: 0000000000001000 [ 39.253607] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560aab9d4ec0 [ 39.254450] R13: 00007ffd95269ff0 R14: 00007ffd9526a020 R15: 00007ffd9526a380 [ 39.255295] [ 39.255589] [ 39.255803] Allocated by task 221: [ 39.256233] kasan_save_stack+0x22/0x50 [ 39.256759] kasan_set_track+0x25/0x30 [ 39.257252] __kasan_slab_alloc+0x59/0x70 [ 39.257778] kmem_cache_alloc+0x16b/0x370 [ 39.258284] vm_area_dup+0x20/0x160 [ 39.258735] __split_vma+0x170/0x950 [ 39.259198] split_vma+0xc6/0x110 [ 39.259627] mprotect_fixup+0x8d2/0xb30 [ 39.260130] do_mprotect_pkey+0x87e/0xd40 [ 39.260654] __x64_sys_mprotect+0x78/0xc0 [ 39.261175] do_syscall_64+0x3f/0x90 [ 39.261642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.262275] [ 39.262486] Freed by task 221: [ 39.262883] kasan_save_stack+0x22/0x50 [ 39.263390] kasan_set_track+0x25/0x30 [ 39.263874] kasan_save_free_info+0x2b/0x50 [ 39.264405] __kasan_slab_free+0x10a/0x190 [ 39.264930] kmem_cache_free+0x10d/0x4d0 [ 39.265423] rcu_core+0x8c8/0x2860 [ 39.265854] __do_softirq+0x1b7/0x7d4 [ 39.266329] [ 39.266546] Last potentially related work creation: [ 39.267124] kasan_save_stack+0x22/0x50 [ 39.267629] __kasan_record_aux_stack+0x8e/0xa0 [ 39.268198] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.268865] remove_vma+0x139/0x170 [ 39.269308] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.269864] do_vmi_munmap+0x1f1/0x2b0 [ 39.270351] __vm_munmap+0x138/0x3a0 [ 39.270810] __x64_sys_munmap+0x59/0x80 [ 39.271300] do_syscall_64+0x3f/0x90 [ 39.271771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.272414] [ 39.272629] The buggy address belongs to the object at ffff888016eedd98 [ 39.272629] which belongs to the cache vm_area_struct of size 168 [ 39.274093] The buggy address is located 88 bytes inside of [ 39.274093] freed 168-byte region [ffff888016eedd98, ffff888016eede40) [ 39.275484] [ 39.275696] The buggy address belongs to the physical page: [ 39.276376] page:00000000fee25fdd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16eed [ 39.277457] memcg:ffff88800cf5cf01 [ 39.277878] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.278510] page_type: 0xffffffff() [ 39.278960] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.279871] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf5cf01 [ 39.280781] page dumped because: kasan: bad access detected [ 39.281444] [ 39.281657] Memory state around the buggy address: [ 39.282236] ffff888016eedc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.283078] ffff888016eedd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.283928] >ffff888016eedd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.284795] ^ [ 39.285604] ffff888016eede00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.286450] ffff888016eede80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.287291] ================================================================== [ 39.288298] Disabling lock debugging due to kernel taint [ 41.200162] BUG: Bad rss-counter state mm:00000000547aae47 type:MM_FILEPAGES val:33 [ 41.201079] BUG: Bad rss-counter state mm:00000000547aae47 type:MM_ANONPAGES val:22 [ 41.713867] BUG: Bad rss-counter state mm:000000006a090636 type:MM_FILEPAGES val:33 [ 41.715055] BUG: Bad rss-counter state mm:000000006a090636 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3217' (ECDSA) to the list of known hosts. 2023/06/19 21:15:54 fuzzer started 2023/06/19 21:15:54 dialing manager at localhost:44161 2023/06/19 21:15:54 checking machine... 2023/06/19 21:15:54 checking revisions... [ 42.355856] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:15:54 testing simple program... [ 42.403071] cgroup: Unknown subsys name 'net' [ 42.455221] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:15:53 Registers: info registers vcpu 0 RAX=ffff888019d90001 RBX=ffff888019d8efe8 RCX=0000000000000001 RDX=ffff888019d8ff01 RSI=ffff888019d8ff50 RDI=ffff888019d8eff8 RBP=ffff888019d8ff50 RSP=ffff888019d8ef40 R8 =ffffffff864b024a R9 =ffff888019d8f028 R10=0000000000038001 R11=00000000000b4fb9 R12=0000000000000008 R13=ffff888019d88000 R14=ffff888019d8ff58 R15=ffff888019d8efe8 RIP=ffffffff8113048d 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6b2c882900 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=00007f6b2c84c008 CR3=000000001a23e000 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=00000000000000000000000000000000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd95652e820 CR3=000000000edbe000 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=2033353a35313a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3833 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3833325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a35313a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000