syzkaller login: [ 31.512593] BUG: Bad rss-counter state mm:00000000392e6266 type:MM_FILEPAGES val:33 [ 31.513878] BUG: Bad rss-counter state mm:00000000392e6266 type:MM_ANONPAGES val:22 [ 31.599120] ================================================================== [ 31.600161] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.601039] Read of size 8 at addr ffff88800feb0058 by task sshd/220 [ 31.601788] [ 31.602057] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.602871] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.603777] Call Trace: [ 31.604082] [ 31.604354] dump_stack_lvl+0x91/0xf0 [ 31.604822] print_report+0xcc/0x620 [ 31.605298] ? __virt_addr_valid+0x102/0x340 [ 31.605827] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.606409] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.606992] kasan_report+0xbe/0xf0 [ 31.607448] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.608040] vma_interval_tree_remove+0xc75/0xec0 [ 31.608610] vma_prepare+0xc54/0x11a0 [ 31.609062] __split_vma+0x5af/0x950 [ 31.609520] ? __pfx___split_vma+0x10/0x10 [ 31.610022] ? find_held_lock+0x2c/0x110 [ 31.610521] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.611071] ? lock_is_held_type+0x9f/0x120 [ 31.611608] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.612208] ? mtree_range_walk+0x632/0x900 [ 31.612754] ? mas_walk+0x5c7/0x7c0 [ 31.613233] do_vmi_munmap+0x1f1/0x2b0 [ 31.613722] mmap_region+0x1f9/0x2660 [ 31.614205] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.614708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.615409] ? __pfx_lock_acquire+0x10/0x10 [ 31.615944] ? __pfx_mmap_region+0x10/0x10 [ 31.616459] ? security_mmap_addr+0x7d/0xa0 [ 31.616980] ? get_unmapped_area+0x1f5/0x3f0 [ 31.617562] do_mmap+0x854/0xf00 [ 31.617999] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.618485] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.619035] ksys_mmap_pgoff+0x3af/0x500 [ 31.619533] do_syscall_64+0x3f/0x90 [ 31.620012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.620649] RIP: 0033:0x7ff9b59a5d82 [ 31.621098] 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 [ 31.623221] RSP: 002b:00007ffdd7056918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.624112] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9b59a5d82 [ 31.624945] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff9b4ddf000 [ 31.625786] RBP: 00007ff9b4ddf000 R08: 0000000000000009 R09: 0000000000001000 [ 31.626624] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f60c22b20 [ 31.627453] R13: 00007ffdd7056930 R14: 00007ffdd7056960 R15: 00007ffdd7056cc0 [ 31.628299] [ 31.628583] [ 31.628795] Allocated by task 213: [ 31.629221] kasan_save_stack+0x22/0x50 [ 31.629716] kasan_set_track+0x25/0x30 [ 31.630210] __kasan_slab_alloc+0x59/0x70 [ 31.630729] kmem_cache_alloc+0x16b/0x370 [ 31.631234] vm_area_dup+0x20/0x160 [ 31.631682] __split_vma+0x170/0x950 [ 31.632137] split_vma+0xc6/0x110 [ 31.632579] mprotect_fixup+0x8d2/0xb30 [ 31.633075] do_mprotect_pkey+0x87e/0xd40 [ 31.633595] __x64_sys_mprotect+0x78/0xc0 [ 31.634108] do_syscall_64+0x3f/0x90 [ 31.634584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.635224] [ 31.635441] Freed by task 213: [ 31.635835] kasan_save_stack+0x22/0x50 [ 31.636322] kasan_set_track+0x25/0x30 [ 31.636814] kasan_save_free_info+0x2b/0x50 [ 31.637343] __kasan_slab_free+0x10a/0x190 [ 31.637868] kmem_cache_free+0x10d/0x4d0 [ 31.638375] rcu_core+0x8c8/0x2860 [ 31.638820] __do_softirq+0x1b7/0x7d4 [ 31.639292] [ 31.639512] Last potentially related work creation: [ 31.640089] kasan_save_stack+0x22/0x50 [ 31.640596] __kasan_record_aux_stack+0x8e/0xa0 [ 31.641176] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.641814] remove_vma+0x139/0x170 [ 31.642256] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.642797] do_vmi_munmap+0x1f1/0x2b0 [ 31.643273] __vm_munmap+0x138/0x3a0 [ 31.643737] __x64_sys_munmap+0x59/0x80 [ 31.644223] do_syscall_64+0x3f/0x90 [ 31.644698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.645340] [ 31.645554] The buggy address belongs to the object at ffff88800feb0000 [ 31.645554] which belongs to the cache vm_area_struct of size 168 [ 31.647017] The buggy address is located 88 bytes inside of [ 31.647017] freed 168-byte region [ffff88800feb0000, ffff88800feb00a8) [ 31.648405] [ 31.648618] The buggy address belongs to the physical page: [ 31.649278] page:00000000dc8dc2e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfeb0 [ 31.650342] memcg:ffff8880097e0801 [ 31.650767] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.651436] page_type: 0xffffffff() [ 31.651883] raw: 0100000000000200 ffff8880087a0c80 ffffea00003db000 dead000000000005 [ 31.652780] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097e0801 [ 31.653691] page dumped because: kasan: bad access detected [ 31.654335] [ 31.654556] Memory state around the buggy address: [ 31.655126] ffff88800feaff00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.655968] ffff88800feaff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.656823] >ffff88800feb0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.657683] ^ [ 31.658410] ffff88800feb0080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.659264] ffff88800feb0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.660116] ================================================================== [ 31.661499] Disabling lock debugging due to kernel taint [ 34.019079] BUG: Bad rss-counter state mm:0000000052952878 type:MM_FILEPAGES val:33 [ 34.020345] BUG: Bad rss-counter state mm:0000000052952878 type:MM_ANONPAGES val:22 [ 34.406622] BUG: Bad rss-counter state mm:000000000f92bd5a type:MM_FILEPAGES val:33 [ 34.407902] BUG: Bad rss-counter state mm:000000000f92bd5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50488' (ECDSA) to the list of known hosts. 2023/06/20 18:47:51 fuzzer started 2023/06/20 18:47:52 dialing manager at localhost:36067 2023/06/20 18:47:52 checking machine... 2023/06/20 18:47:52 checking revisions... [ 35.142354] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:47:52 testing simple program... [ 35.190047] cgroup: Unknown subsys name 'net' [ 35.263673] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:47:51 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000002 RCX=00007ffd1e5569a0 RDX=0000000000000003 RSI=00007ffd1e556bf0 RDI=00007ffd1e556b30 RBP=0000000000000001 RSP=00007ffd1e5567c0 R8 =0000000000000000 R9 =0000000000000010 R10=0000000000000002 R11=0000000000656434 R12=0000000000000180 R13=00007ffd1e556c20 R14=00007ffd1e556b30 R15=0000000000000000 RIP=00007f28f9a84523 RFL=00000206 [-----P-] 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 00007f28f927c900 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=00007f28f8704938 CR3=000000000b382000 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=80f09f19808d26a300000000000aec68 XMM01=80f09f19808d26a300000000000aec68 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d68394d66cd0d3ee00000000000ae988 XMM05=bd3cfe54c69c605c0000000000132390 XMM06=39d2c2fd33dec58b0000000000131130 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffff88806cf09b18 RDX=1ffff1100d9e135a RSI=ffff88806cf09a48 RDI=ffff88806cf09a78 RBP=ffff88806cf09ad0 RSP=ffff88806cf099b8 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000006097 R12=ffffed100d9e1351 R13=ffffed100d9e1350 R14=ffff88806cf09ac0 R15=ffff88806cf09a78 RIP=ffffffff8113062c 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 00007f16d89b8900 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=00007f16d8f6f618 CR3=000000000e96c000 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=563412feff00545000000000000080fe 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