syzkaller login: [ 44.098956] BUG: Bad rss-counter state mm:00000000c17d8b8c type:MM_FILEPAGES val:33 [ 44.099633] BUG: Bad rss-counter state mm:00000000c17d8b8c type:MM_ANONPAGES val:22 [ 44.130593] ================================================================== [ 44.131322] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.132278] Read of size 8 at addr ffff88801812f228 by task sshd/220 [ 44.132971] [ 44.133155] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.133891] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.134535] Call Trace: [ 44.134744] [ 44.134928] dump_stack_lvl+0x91/0xf0 [ 44.135244] print_report+0xcc/0x620 [ 44.135554] ? __virt_addr_valid+0x102/0x340 [ 44.135930] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.136326] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.136720] kasan_report+0xbe/0xf0 [ 44.137025] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.137419] vma_interval_tree_remove+0xc75/0xec0 [ 44.137817] vma_prepare+0xc54/0x11a0 [ 44.138127] __split_vma+0x5af/0x950 [ 44.138430] ? __pfx___split_vma+0x10/0x10 [ 44.138790] ? find_held_lock+0x2c/0x110 [ 44.139127] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.139488] ? lock_is_held_type+0x9f/0x120 [ 44.139832] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.140220] ? mtree_range_walk+0x632/0x900 [ 44.140576] ? mas_walk+0x5c7/0x7c0 [ 44.140887] do_vmi_munmap+0x1f1/0x2b0 [ 44.141202] mmap_region+0x1f9/0x2660 [ 44.141513] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.141843] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.142303] ? __pfx_lock_acquire+0x10/0x10 [ 44.142651] ? __pfx_mmap_region+0x10/0x10 [ 44.142993] ? security_mmap_addr+0x7d/0xa0 [ 44.143333] ? get_unmapped_area+0x1f5/0x3f0 [ 44.143685] do_mmap+0x854/0xf00 [ 44.143968] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.144281] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.144648] ksys_mmap_pgoff+0x3af/0x500 [ 44.144975] do_syscall_64+0x3f/0x90 [ 44.145282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.145698] RIP: 0033:0x7ff1e541ed82 [ 44.145994] 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 [ 44.147349] RSP: 002b:00007ffdcb984568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.147930] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff1e541ed82 [ 44.148471] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1e4858000 [ 44.149128] RBP: 00007ff1e4858000 R08: 0000000000000009 R09: 0000000000001000 [ 44.149672] R10: 0000000000000812 R11: 0000000000000206 R12: 000055936db8cec0 [ 44.150209] R13: 00007ffdcb984580 R14: 00007ffdcb9845b0 R15: 00007ffdcb984910 [ 44.150781] [ 44.150969] [ 44.151107] Allocated by task 213: [ 44.151382] kasan_save_stack+0x22/0x50 [ 44.151706] kasan_set_track+0x25/0x30 [ 44.152023] __kasan_slab_alloc+0x59/0x70 [ 44.152358] kmem_cache_alloc+0x16b/0x370 [ 44.152689] vm_area_dup+0x20/0x160 [ 44.152981] __split_vma+0x170/0x950 [ 44.153278] split_vma+0xc6/0x110 [ 44.153561] mprotect_fixup+0x8d2/0xb30 [ 44.153884] do_mprotect_pkey+0x87e/0xd40 [ 44.154216] __x64_sys_mprotect+0x78/0xc0 [ 44.154564] do_syscall_64+0x3f/0x90 [ 44.154871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.155284] [ 44.155427] Freed by task 213: [ 44.155679] kasan_save_stack+0x22/0x50 [ 44.156002] kasan_set_track+0x25/0x30 [ 44.156320] kasan_save_free_info+0x2b/0x50 [ 44.156669] __kasan_slab_free+0x10a/0x190 [ 44.157016] kmem_cache_free+0x10d/0x4d0 [ 44.157343] rcu_core+0x8c8/0x2860 [ 44.157632] __do_softirq+0x1b7/0x7d4 [ 44.157939] [ 44.158080] Last potentially related work creation: [ 44.158460] kasan_save_stack+0x22/0x50 [ 44.158811] __kasan_record_aux_stack+0x8e/0xa0 [ 44.159183] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.159596] remove_vma+0x139/0x170 [ 44.159890] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.160247] do_vmi_munmap+0x1f1/0x2b0 [ 44.160558] __vm_munmap+0x138/0x3a0 [ 44.160858] __x64_sys_munmap+0x59/0x80 [ 44.161174] do_syscall_64+0x3f/0x90 [ 44.161476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.161893] [ 44.162030] The buggy address belongs to the object at ffff88801812f1d0 [ 44.162030] which belongs to the cache vm_area_struct of size 168 [ 44.162980] The buggy address is located 88 bytes inside of [ 44.162980] freed 168-byte region [ffff88801812f1d0, ffff88801812f278) [ 44.163879] [ 44.164019] The buggy address belongs to the physical page: [ 44.164439] page:00000000ec494d79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1812f [ 44.165142] memcg:ffff88800e017d01 [ 44.165417] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.165831] page_type: 0xffffffff() [ 44.166128] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.166733] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e017d01 [ 44.167308] page dumped because: kasan: bad access detected [ 44.167737] [ 44.167881] Memory state around the buggy address: [ 44.168254] ffff88801812f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.168802] ffff88801812f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 44.169351] >ffff88801812f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 44.169895] ^ [ 44.170252] ffff88801812f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 44.170824] ffff88801812f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 44.171473] ================================================================== [ 44.172104] Disabling lock debugging due to kernel taint [ 45.589130] BUG: Bad rss-counter state mm:00000000e21fc15f type:MM_FILEPAGES val:33 [ 45.590076] BUG: Bad rss-counter state mm:00000000e21fc15f type:MM_ANONPAGES val:22 [ 45.937956] BUG: Bad rss-counter state mm:000000003ea53661 type:MM_FILEPAGES val:33 [ 45.938697] BUG: Bad rss-counter state mm:000000003ea53661 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21595' (ECDSA) to the list of known hosts. 2023/06/20 09:38:18 fuzzer started 2023/06/20 09:38:18 dialing manager at localhost:44161 2023/06/20 09:38:18 checking machine... 2023/06/20 09:38:18 checking revisions... [ 46.431113] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:38:18 testing simple program... [ 46.467714] cgroup: Unknown subsys name 'net' [ 46.497253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:38:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffef6e32ff8 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=00007f78807d05100000564bcbe44790 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=0000000000000000 RBX=ffffffff87f94640 RCX=0000000000000000 RDX=ffff888016ddb680 RSI=ffffffff83ab3fa9 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88801c9f7508 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000007 R11=00000f5800000f58 R12=0000000000000000 R13=0000000000000007 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff83ab3fb1 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 00007fe54a863900 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=00007fe54ae1a618 CR3=00000000199ee000 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