syzkaller login: [ 36.683354] BUG: Bad rss-counter state mm:000000009c0287cc type:MM_FILEPAGES val:33 [ 36.685139] BUG: Bad rss-counter state mm:000000009c0287cc type:MM_ANONPAGES val:22 [ 36.857867] ================================================================== [ 36.858900] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.860007] Read of size 8 at addr ffff88801810fdf0 by task sshd/221 [ 36.861260] [ 36.861510] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.862611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.863718] Call Trace: [ 36.864074] [ 36.864389] dump_stack_lvl+0x91/0xf0 [ 36.865042] print_report+0xcc/0x620 [ 36.865690] ? __virt_addr_valid+0x102/0x340 [ 36.866586] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.867548] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.868448] kasan_report+0xbe/0xf0 [ 36.869099] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.869846] vma_interval_tree_remove+0xc75/0xec0 [ 36.870711] vma_prepare+0xc54/0x11a0 [ 36.871309] __split_vma+0x5af/0x950 [ 36.871864] ? __pfx___split_vma+0x10/0x10 [ 36.872645] ? find_held_lock+0x2c/0x110 [ 36.873261] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.874086] ? lock_is_held_type+0x9f/0x120 [ 36.874853] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.875575] ? mtree_range_walk+0x632/0x900 [ 36.876213] ? mas_walk+0x5c7/0x7c0 [ 36.876761] do_vmi_munmap+0x1f1/0x2b0 [ 36.877339] mmap_region+0x1f9/0x2660 [ 36.877898] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.878496] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.879350] ? __pfx_lock_acquire+0x10/0x10 [ 36.879972] ? __pfx_mmap_region+0x10/0x10 [ 36.880657] ? security_mmap_addr+0x7d/0xa0 [ 36.881385] ? get_unmapped_area+0x1f5/0x3f0 [ 36.882131] do_mmap+0x854/0xf00 [ 36.882689] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.883269] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.883939] ksys_mmap_pgoff+0x3af/0x500 [ 36.884532] do_syscall_64+0x3f/0x90 [ 36.885236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.886000] RIP: 0033:0x7f00869e9d82 [ 36.886619] 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 [ 36.889402] RSP: 002b:00007ffe413c7c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.890629] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f00869e9d82 [ 36.891818] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0085e23000 [ 36.892961] RBP: 00007f0085e23000 R08: 0000000000000009 R09: 0000000000001000 [ 36.894110] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f374031b20 [ 36.895250] R13: 00007ffe413c7ca0 R14: 00007ffe413c7cd0 R15: 00007ffe413c8030 [ 36.896430] [ 36.896781] [ 36.897032] Allocated by task 214: [ 36.897532] kasan_save_stack+0x22/0x50 [ 36.898135] kasan_set_track+0x25/0x30 [ 36.898708] __kasan_slab_alloc+0x59/0x70 [ 36.899357] kmem_cache_alloc+0x16b/0x370 [ 36.899959] vm_area_dup+0x20/0x160 [ 36.900495] __split_vma+0x170/0x950 [ 36.901044] split_vma+0xc6/0x110 [ 36.901598] mprotect_fixup+0x8d2/0xb30 [ 36.902205] do_mprotect_pkey+0x87e/0xd40 [ 36.902810] __x64_sys_mprotect+0x78/0xc0 [ 36.903431] do_syscall_64+0x3f/0x90 [ 36.903990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.904742] [ 36.904996] Freed by task 214: [ 36.905461] kasan_save_stack+0x22/0x50 [ 36.906045] kasan_set_track+0x25/0x30 [ 36.906626] kasan_save_free_info+0x2b/0x50 [ 36.907251] __kasan_slab_free+0x10a/0x190 [ 36.907894] kmem_cache_free+0x10d/0x4d0 [ 36.908492] rcu_core+0x8c8/0x2860 [ 36.909010] __do_softirq+0x1b7/0x7d4 [ 36.909566] [ 36.909816] Last potentially related work creation: [ 36.910493] kasan_save_stack+0x22/0x50 [ 36.911081] __kasan_record_aux_stack+0x8e/0xa0 [ 36.911745] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.912397] remove_vma+0x139/0x170 [ 36.912860] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.913427] do_vmi_munmap+0x1f1/0x2b0 [ 36.913928] __vm_munmap+0x138/0x3a0 [ 36.914401] __x64_sys_munmap+0x59/0x80 [ 36.914903] do_syscall_64+0x3f/0x90 [ 36.915383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.916031] [ 36.916250] The buggy address belongs to the object at ffff88801810fd98 [ 36.916250] which belongs to the cache vm_area_struct of size 168 [ 36.917718] The buggy address is located 88 bytes inside of [ 36.917718] freed 168-byte region [ffff88801810fd98, ffff88801810fe40) [ 36.919122] [ 36.919353] The buggy address belongs to the physical page: [ 36.920021] page:0000000004b62610 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1810f [ 36.921109] memcg:ffff88801426e301 [ 36.921532] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.922184] page_type: 0xffffffff() [ 36.922636] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.923571] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801426e301 [ 36.924487] page dumped because: kasan: bad access detected [ 36.925150] [ 36.925372] Memory state around the buggy address: [ 36.925960] ffff88801810fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.926830] ffff88801810fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.927730] >ffff88801810fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.928600] ^ [ 36.929428] ffff88801810fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.930301] ffff88801810fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.931176] ================================================================== [ 36.932153] Disabling lock debugging due to kernel taint [ 38.858280] BUG: Bad rss-counter state mm:0000000074942362 type:MM_FILEPAGES val:33 [ 38.859549] BUG: Bad rss-counter state mm:0000000074942362 type:MM_ANONPAGES val:22 [ 39.277953] BUG: Bad rss-counter state mm:00000000c37a9901 type:MM_FILEPAGES val:33 [ 39.279545] BUG: Bad rss-counter state mm:00000000c37a9901 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44855' (ECDSA) to the list of known hosts. 2023/06/19 11:27:10 fuzzer started 2023/06/19 11:27:10 dialing manager at localhost:44161 2023/06/19 11:27:10 checking machine... 2023/06/19 11:27:10 checking revisions... [ 39.986294] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:27:10 testing simple program... [ 40.032433] cgroup: Unknown subsys name 'net' [ 40.075140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:27:04 Registers: info registers vcpu 0 RAX=1ffff110013352ab RBX=ffff8880099a9528 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880099a9558 RBP=ffff888009997e80 RSP=ffff888015f078e8 R8 =0000000000000001 R9 =ffffed1002be0f11 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff8880099a6500 R14=ffffffff8366dfdf R15=ffff88800d9f0980 RIP=ffffffff81846362 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 00007fb3ff54d700 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=00007f2f1fe91618 CR3=0000000009810000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732030313a3732 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323334 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=0000000000000001 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=00007f66a77af028 CR3=000000000f636000 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=84ae9a29b0615bb30d41e1192cf5b226 XMM02=000000000011cd58eff9b2d0a8fce9cb XMM03=000000000011ce282c67c8bc2e329bc3 XMM04=284e4d3f8073cc0000000000000ae988 XMM05=ca22766a344d67930000000000134710 XMM06=c291bd5c70af25b90000000000134108 XMM07=e042d86d42eb936e00000000001248f0 XMM08=4bc63cf966224fd0000000000011ce28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000