syzkaller login: [ 38.831187] BUG: Bad rss-counter state mm:00000000d60e9961 type:MM_FILEPAGES val:33 [ 38.832304] BUG: Bad rss-counter state mm:00000000d60e9961 type:MM_ANONPAGES val:22 [ 38.872192] ================================================================== [ 38.873260] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.874301] Read of size 8 at addr ffff888016fd7d08 by task sshd/225 [ 38.875113] [ 38.875349] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.876330] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.877414] Call Trace: [ 38.877762] [ 38.878065] dump_stack_lvl+0x91/0xf0 [ 38.878584] print_report+0xcc/0x620 [ 38.879094] ? __virt_addr_valid+0x102/0x340 [ 38.879710] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880411] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.881071] kasan_report+0xbe/0xf0 [ 38.881667] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882336] vma_interval_tree_remove+0xc75/0xec0 [ 38.883001] vma_prepare+0xc54/0x11a0 [ 38.883493] __split_vma+0x5af/0x950 [ 38.884064] ? __pfx___split_vma+0x10/0x10 [ 38.884628] ? find_held_lock+0x2c/0x110 [ 38.885201] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.885796] ? lock_is_held_type+0x9f/0x120 [ 38.886385] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.887024] ? mtree_range_walk+0x632/0x900 [ 38.887628] ? mas_walk+0x5c7/0x7c0 [ 38.888189] do_vmi_munmap+0x1f1/0x2b0 [ 38.888692] mmap_region+0x1f9/0x2660 [ 38.889197] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.889723] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.890479] ? __pfx_lock_acquire+0x10/0x10 [ 38.891048] ? __pfx_mmap_region+0x10/0x10 [ 38.891624] ? security_mmap_addr+0x7d/0xa0 [ 38.892212] ? get_unmapped_area+0x1f5/0x3f0 [ 38.892799] do_mmap+0x854/0xf00 [ 38.893291] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.893815] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.894413] ksys_mmap_pgoff+0x3af/0x500 [ 38.894965] do_syscall_64+0x3f/0x90 [ 38.895481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896247] RIP: 0033:0x7f644f5b9d82 [ 38.896727] 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 [ 38.899072] RSP: 002b:00007ffca35f5ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.900071] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f644f5b9d82 [ 38.900978] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f644e9f3000 [ 38.901875] RBP: 00007f644e9f3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.902800] R10: 0000000000000812 R11: 0000000000000206 R12: 000055630fe35ec0 [ 38.903733] R13: 00007ffca35f5f00 R14: 00007ffca35f5f30 R15: 00007ffca35f6290 [ 38.904697] [ 38.905015] [ 38.905237] Allocated by task 218: [ 38.905686] kasan_save_stack+0x22/0x50 [ 38.906231] kasan_set_track+0x25/0x30 [ 38.906756] __kasan_slab_alloc+0x59/0x70 [ 38.907306] kmem_cache_alloc+0x16b/0x370 [ 38.907880] vm_area_dup+0x20/0x160 [ 38.908378] __split_vma+0x170/0x950 [ 38.908875] split_vma+0xc6/0x110 [ 38.909338] mprotect_fixup+0x8d2/0xb30 [ 38.909861] do_mprotect_pkey+0x87e/0xd40 [ 38.910421] __x64_sys_mprotect+0x78/0xc0 [ 38.910982] do_syscall_64+0x3f/0x90 [ 38.911491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912235] [ 38.912456] Freed by task 218: [ 38.912887] kasan_save_stack+0x22/0x50 [ 38.913412] kasan_set_track+0x25/0x30 [ 38.913945] kasan_save_free_info+0x2b/0x50 [ 38.914500] __kasan_slab_free+0x10a/0x190 [ 38.915070] kmem_cache_free+0x10d/0x4d0 [ 38.915606] rcu_core+0x8c8/0x2860 [ 38.916137] __do_softirq+0x1b7/0x7d4 [ 38.916635] [ 38.916864] Last potentially related work creation: [ 38.917517] kasan_save_stack+0x22/0x50 [ 38.918047] __kasan_record_aux_stack+0x8e/0xa0 [ 38.918659] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.919338] remove_vma+0x139/0x170 [ 38.919845] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.920490] do_vmi_munmap+0x1f1/0x2b0 [ 38.920997] __vm_munmap+0x138/0x3a0 [ 38.921470] __x64_sys_munmap+0x59/0x80 [ 38.921996] do_syscall_64+0x3f/0x90 [ 38.922508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923204] [ 38.923428] The buggy address belongs to the object at ffff888016fd7cb0 [ 38.923428] which belongs to the cache vm_area_struct of size 168 [ 38.925103] The buggy address is located 88 bytes inside of [ 38.925103] freed 168-byte region [ffff888016fd7cb0, ffff888016fd7d58) [ 38.926636] [ 38.926865] The buggy address belongs to the physical page: [ 38.927575] page:000000006f6e6458 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fd7 [ 38.928804] memcg:ffff888016b97d01 [ 38.929264] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.929959] page_type: 0xffffffff() [ 38.930433] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.931430] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b97d01 [ 38.932451] page dumped because: kasan: bad access detected [ 38.933182] [ 38.933406] Memory state around the buggy address: [ 38.934033] ffff888016fd7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.934946] ffff888016fd7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.935954] >ffff888016fd7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.936865] ^ [ 38.937329] ffff888016fd7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.938268] ffff888016fd7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.939167] ================================================================== [ 38.940425] Disabling lock debugging due to kernel taint [ 40.807466] BUG: Bad rss-counter state mm:000000007476f55a type:MM_FILEPAGES val:33 [ 40.808441] BUG: Bad rss-counter state mm:000000007476f55a type:MM_ANONPAGES val:22 [ 41.398153] BUG: Bad rss-counter state mm:0000000024c101b1 type:MM_FILEPAGES val:33 [ 41.399305] BUG: Bad rss-counter state mm:0000000024c101b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3080' (ECDSA) to the list of known hosts. 2023/06/21 03:01:19 fuzzer started 2023/06/21 03:01:19 dialing manager at localhost:36067 2023/06/21 03:01:19 checking machine... 2023/06/21 03:01:19 checking revisions... [ 42.043567] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:01:19 testing simple program... [ 42.091175] cgroup: Unknown subsys name 'net' [ 42.143785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:01:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffe30381f78 CR3=0000000005482000 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=00007f7b081c351000005585d8be2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff85652c60 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=00007fee7db5d366 RSP=ffff8880180570d0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007fee7db5d366 R13=0000000000000000 R14=ffff88800f200000 R15=0000000000092cc0 RIP=ffffffff812d8e70 RFL=00000246 [---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 00007fee7d66a900 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=00007fee7dc21618 CR3=000000000db84000 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