syzkaller login: [ 35.681334] sshd (212) used greatest stack depth: 24128 bytes left [ 35.682491] BUG: Bad rss-counter state mm:0000000055638041 type:MM_FILEPAGES val:33 [ 35.684708] BUG: Bad rss-counter state mm:0000000055638041 type:MM_ANONPAGES val:22 [ 35.852211] ================================================================== [ 35.853301] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.854427] Read of size 8 at addr ffff888016cbfa50 by task sshd/219 [ 35.855520] [ 35.855785] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.856858] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.858004] Call Trace: [ 35.858328] <TASK> [ 35.858604] dump_stack_lvl+0x91/0xf0 [ 35.859068] print_report+0xcc/0x620 [ 35.859525] ? __virt_addr_valid+0x102/0x340 [ 35.860052] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.860635] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.861215] kasan_report+0xbe/0xf0 [ 35.861667] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.862251] vma_interval_tree_remove+0xc75/0xec0 [ 35.862826] vma_prepare+0xc54/0x11a0 [ 35.863277] __split_vma+0x5af/0x950 [ 35.863723] ? __pfx___split_vma+0x10/0x10 [ 35.864246] ? find_held_lock+0x2c/0x110 [ 35.864744] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.865282] ? lock_is_held_type+0x9f/0x120 [ 35.865810] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.866396] ? mtree_range_walk+0x632/0x900 [ 35.866943] ? mas_walk+0x5c7/0x7c0 [ 35.867410] do_vmi_munmap+0x1f1/0x2b0 [ 35.867910] mmap_region+0x1f9/0x2660 [ 35.868386] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.868894] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.869598] ? __pfx_lock_acquire+0x10/0x10 [ 35.870126] ? __pfx_mmap_region+0x10/0x10 [ 35.870652] ? security_mmap_addr+0x7d/0xa0 [ 35.871181] ? get_unmapped_area+0x1f5/0x3f0 [ 35.871735] do_mmap+0x854/0xf00 [ 35.872175] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.872668] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.873253] ksys_mmap_pgoff+0x3af/0x500 [ 35.873756] do_syscall_64+0x3f/0x90 [ 35.874231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.874879] RIP: 0033:0x7fc1f9e22d82 [ 35.875326] 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 [ 35.877434] RSP: 002b:00007ffe9257e2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.878328] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1f9e22d82 [ 35.879169] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1f925c000 [ 35.880026] RBP: 00007fc1f925c000 R08: 0000000000000009 R09: 0000000000001000 [ 35.880847] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cafe8c8ec0 [ 35.881697] R13: 00007ffe9257e2d0 R14: 00007ffe9257e300 R15: 00007ffe9257e660 [ 35.882533] </TASK> [ 35.882816] [ 35.883023] Allocated by task 212: [ 35.883442] kasan_save_stack+0x22/0x50 [ 35.883953] kasan_set_track+0x25/0x30 [ 35.884440] __kasan_slab_alloc+0x59/0x70 [ 35.884954] kmem_cache_alloc+0x16b/0x370 [ 35.885464] vm_area_dup+0x20/0x160 [ 35.885920] __split_vma+0x170/0x950 [ 35.886382] split_vma+0xc6/0x110 [ 35.886816] mprotect_fixup+0x8d2/0xb30 [ 35.887308] do_mprotect_pkey+0x87e/0xd40 [ 35.887827] __x64_sys_mprotect+0x78/0xc0 [ 35.888357] do_syscall_64+0x3f/0x90 [ 35.888824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.889444] [ 35.889656] Freed by task 212: [ 35.890039] kasan_save_stack+0x22/0x50 [ 35.890521] kasan_set_track+0x25/0x30 [ 35.891019] kasan_save_free_info+0x2b/0x50 [ 35.891553] __kasan_slab_free+0x10a/0x190 [ 35.892083] kmem_cache_free+0x10d/0x4d0 [ 35.892586] rcu_core+0x8c8/0x2860 [ 35.893034] __do_softirq+0x1b7/0x7d4 [ 35.893508] [ 35.893715] Last potentially related work creation: [ 35.894299] kasan_save_stack+0x22/0x50 [ 35.894793] __kasan_record_aux_stack+0x8e/0xa0 [ 35.895359] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.896062] remove_vma+0x139/0x170 [ 35.896549] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.897100] do_vmi_munmap+0x1f1/0x2b0 [ 35.897601] __vm_munmap+0x138/0x3a0 [ 35.898071] __x64_sys_munmap+0x59/0x80 [ 35.898569] do_syscall_64+0x3f/0x90 [ 35.899041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.899679] [ 35.899893] Second to last potentially related work creation: [ 35.900561] kasan_save_stack+0x22/0x50 [ 35.901047] __kasan_record_aux_stack+0x8e/0xa0 [ 35.901611] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.902245] remove_vma+0x139/0x170 [ 35.902700] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.903251] do_vmi_munmap+0x1f1/0x2b0 [ 35.903735] mmap_region+0x1f9/0x2660 [ 35.904213] do_mmap+0x854/0xf00 [ 35.904638] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.905105] ksys_mmap_pgoff+0x3af/0x500 [ 35.905618] do_syscall_64+0x3f/0x90 [ 35.906093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.906724] [ 35.906930] The buggy address belongs to the object at ffff888016cbf9f8 [ 35.906930] which belongs to the cache vm_area_struct of size 168 [ 35.908387] The buggy address is located 88 bytes inside of [ 35.908387] freed 168-byte region [ffff888016cbf9f8, ffff888016cbfaa0) [ 35.909785] [ 35.910001] The buggy address belongs to the physical page: [ 35.910656] page:000000004d82cb21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cbf [ 35.911746] memcg:ffff888019ff3401 [ 35.912177] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.912798] page_type: 0xffffffff() [ 35.913233] raw: 0100000000000200 ffff8880087a0c80 ffffea0000601040 0000000000000004 [ 35.914130] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ff3401 [ 35.915052] page dumped because: kasan: bad access detected [ 35.915706] [ 35.915924] Memory state around the buggy address: [ 35.916502] ffff888016cbf900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.917356] ffff888016cbf980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.918203] >ffff888016cbfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.919049] ^ [ 35.919752] ffff888016cbfa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 35.920630] ffff888016cbfb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.921492] ================================================================== [ 35.922415] Disabling lock debugging due to kernel taint [ 38.725106] BUG: Bad rss-counter state mm:00000000fd38a9e9 type:MM_FILEPAGES val:33 [ 38.726146] BUG: Bad rss-counter state mm:00000000fd38a9e9 type:MM_ANONPAGES val:22 [ 39.182835] BUG: Bad rss-counter state mm:0000000073370981 type:MM_FILEPAGES val:33 [ 39.183559] BUG: Bad rss-counter state mm:0000000073370981 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30974' (ECDSA) to the list of known hosts. 2023/06/20 18:41:47 fuzzer started 2023/06/20 18:41:47 dialing manager at localhost:36067 2023/06/20 18:41:48 checking machine... 2023/06/20 18:41:48 checking revisions... [ 39.858907] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:41:48 testing simple program... [ 39.901815] cgroup: Unknown subsys name 'net' [ 39.952123] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:41:47 Registers: info registers vcpu 0 RAX=ffffffffffffffa7 RBX=0000000000000058 RCX=00007fa16e5da320 RDX=00007fa16e5d9d4c RSI=00007ffda18473c8 RDI=000055ded91c3640 RBP=0000000000000006 RSP=00007ffda1847420 R8 =0000000000000058 R9 =0000000000134178 R10=0000000000000002 R11=000000000000ed1c R12=000055ded91c4290 R13=00007ffda1847538 R14=0000000000000058 R15=0000000000134178 RIP=00007fa16e56be1a RFL=00000207 [-----PC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa16d9e8900 00000000 00000000 GS =0000 0000000000000000 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=00007fa16cf07020 CR3=000000000c698000 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=97bb9b27f9a666b129404a5b476ec972 XMM02=000000000011aee8eff9b2d0a8fce9cb XMM03=000000000011afb82c67c8bc2e329bc3 XMM04=c1134c9195f6239100000000000ae988 XMM05=851d7f88f1e9c5610000000000133ee0 XMM06=7eee2d1b5575130a0000000000132910 XMM07=fb795ef6d65770560000000000121918 XMM08=2c67c8bc2e329bc3000000000011af58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002dc9f35 RSP=ffff888016e4f998 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88801cc0f4d8 R13=ffffffff818468a3 R14=ffffffff8366b8df R15=0000000000000000 RIP=ffffffff812d86f2 RFL=00000047 [---Z-PC] 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 00007f99b8e9a900 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=00007fff243d9000 CR3=000000000db9c000 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