syzkaller login: [ 31.453108] BUG: Bad rss-counter state mm:000000000a4cb452 type:MM_FILEPAGES val:33 [ 31.454499] BUG: Bad rss-counter state mm:000000000a4cb452 type:MM_ANONPAGES val:22 [ 31.607116] ================================================================== [ 31.608038] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.608983] Read of size 8 at addr ffff88801a09d798 by task sshd/219 [ 31.609862] [ 31.610100] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.610971] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.611968] Call Trace: [ 31.612292] [ 31.612579] dump_stack_lvl+0x91/0xf0 [ 31.613072] print_report+0xcc/0x620 [ 31.613558] ? __virt_addr_valid+0x102/0x340 [ 31.614128] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.614750] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.615367] kasan_report+0xbe/0xf0 [ 31.615846] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.616471] vma_interval_tree_remove+0xc75/0xec0 [ 31.617077] vma_prepare+0xc54/0x11a0 [ 31.617560] __split_vma+0x5af/0x950 [ 31.618065] ? __pfx___split_vma+0x10/0x10 [ 31.618615] ? find_held_lock+0x2c/0x110 [ 31.619147] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.619716] ? lock_is_held_type+0x9f/0x120 [ 31.620272] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.620894] ? mtree_range_walk+0x632/0x900 [ 31.621460] ? mas_walk+0x5c7/0x7c0 [ 31.621956] do_vmi_munmap+0x1f1/0x2b0 [ 31.622480] mmap_region+0x1f9/0x2660 [ 31.622978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.623499] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.624229] ? __pfx_lock_acquire+0x10/0x10 [ 31.624780] ? __pfx_mmap_region+0x10/0x10 [ 31.625327] ? security_mmap_addr+0x7d/0xa0 [ 31.625875] ? get_unmapped_area+0x1f5/0x3f0 [ 31.626450] do_mmap+0x854/0xf00 [ 31.626896] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.627394] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.627964] ksys_mmap_pgoff+0x3af/0x500 [ 31.628483] do_syscall_64+0x3f/0x90 [ 31.628979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.629649] RIP: 0033:0x7f5948b62d82 [ 31.630148] 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 [ 31.632334] RSP: 002b:00007ffc221e3368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.633261] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5948b62d82 [ 31.634147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5947f9c000 [ 31.635020] RBP: 00007f5947f9c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.635876] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604a7d43f60 [ 31.636732] R13: 00007ffc221e3380 R14: 00007ffc221e33b0 R15: 00007ffc221e3710 [ 31.637626] [ 31.637924] [ 31.638154] Allocated by task 212: [ 31.638602] kasan_save_stack+0x22/0x50 [ 31.639108] kasan_set_track+0x25/0x30 [ 31.639616] __kasan_slab_alloc+0x59/0x70 [ 31.640159] kmem_cache_alloc+0x16b/0x370 [ 31.640689] vm_area_dup+0x20/0x160 [ 31.641158] __split_vma+0x170/0x950 [ 31.641637] split_vma+0xc6/0x110 [ 31.642113] mprotect_fixup+0x8d2/0xb30 [ 31.642625] do_mprotect_pkey+0x87e/0xd40 [ 31.643151] __x64_sys_mprotect+0x78/0xc0 [ 31.643677] do_syscall_64+0x3f/0x90 [ 31.644166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.644838] [ 31.645059] Freed by task 212: [ 31.645473] kasan_save_stack+0x22/0x50 [ 31.645999] kasan_set_track+0x25/0x30 [ 31.646511] kasan_save_free_info+0x2b/0x50 [ 31.647080] __kasan_slab_free+0x10a/0x190 [ 31.647628] kmem_cache_free+0x10d/0x4d0 [ 31.648150] rcu_core+0x8c8/0x2860 [ 31.648602] __do_softirq+0x1b7/0x7d4 [ 31.649090] [ 31.649309] Last potentially related work creation: [ 31.649894] kasan_save_stack+0x22/0x50 [ 31.650437] __kasan_record_aux_stack+0x8e/0xa0 [ 31.651016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.651664] remove_vma+0x139/0x170 [ 31.652118] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.652679] do_vmi_munmap+0x1f1/0x2b0 [ 31.653167] __vm_munmap+0x138/0x3a0 [ 31.653637] __x64_sys_munmap+0x59/0x80 [ 31.654149] do_syscall_64+0x3f/0x90 [ 31.654634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.655281] [ 31.655497] The buggy address belongs to the object at ffff88801a09d740 [ 31.655497] which belongs to the cache vm_area_struct of size 168 [ 31.656968] The buggy address is located 88 bytes inside of [ 31.656968] freed 168-byte region [ffff88801a09d740, ffff88801a09d7e8) [ 31.658392] [ 31.658619] The buggy address belongs to the physical page: [ 31.659310] page:00000000d1502b31 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a09d [ 31.660481] memcg:ffff88801a16f401 [ 31.660934] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.661616] page_type: 0xffffffff() [ 31.662098] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.663091] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a16f401 [ 31.664050] page dumped because: kasan: bad access detected [ 31.664747] [ 31.664972] Memory state around the buggy address: [ 31.665587] ffff88801a09d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.666509] ffff88801a09d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.667424] >ffff88801a09d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.668327] ^ [ 31.668847] ffff88801a09d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.669748] ffff88801a09d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.670666] ================================================================== [ 31.671766] Disabling lock debugging due to kernel taint [ 33.707106] BUG: Bad rss-counter state mm:00000000e2b6ace5 type:MM_FILEPAGES val:33 [ 33.708270] BUG: Bad rss-counter state mm:00000000e2b6ace5 type:MM_ANONPAGES val:22 [ 34.073218] BUG: Bad rss-counter state mm:0000000041825aa5 type:MM_FILEPAGES val:33 [ 34.074418] BUG: Bad rss-counter state mm:0000000041825aa5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46610' (ECDSA) to the list of known hosts. 2023/06/20 18:52:46 fuzzer started 2023/06/20 18:52:46 dialing manager at localhost:36067 2023/06/20 18:52:46 checking machine... 2023/06/20 18:52:46 checking revisions... [ 34.775438] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:52:46 testing simple program... [ 34.832459] cgroup: Unknown subsys name 'net' [ 34.877501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:52:46 Registers: info registers vcpu 0 RAX=1ffffffff0c0abff RBX=ffffffff86055ff8 RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864bcdf6 RDI=ffffffff86055fb8 RBP=ffffffff86055fb8 RSP=ffff88806ce099b8 R8 =ffffffff864bcdf6 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b6d7d R12=ffffffff86056038 R13=ffffffff86055fb8 R14=ffffffff86055fb8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f6d7a47e900 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=00007f7cd3a81650 CR3=0000000013a6c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=7f23f866aa32584800000000000ae988 XMM05=e9f5d924faaac20b0000000000133158 XMM06=19e9129bd510f2350000000000132010 XMM07=fb795ef6d657705600000000001221e8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000079ae3e6b RBX=00007fc0523aca70 RCX=000055d11db98c80 RDX=0000000000000000 RSI=000055d11db98e30 RDI=00007fc04c007ee0 RBP=00007fc04c007ee0 RSP=00007fc0523aca30 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000000 R12=000055d11d555a50 R13=00007fc0523aca70 R14=0000000000000001 R15=000055d11db98e30 RIP=000055d11d4f2614 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 00007fc0523ad700 00000000 00000000 GS =0000 0000000000000000 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=000055cbd8844218 CR3=000000000ffa8000 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=2036343a32353a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a32353a3831203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000