syzkaller login: [ 37.376743] BUG: Bad rss-counter state mm:00000000e5723173 type:MM_FILEPAGES val:33 [ 37.378053] BUG: Bad rss-counter state mm:00000000e5723173 type:MM_ANONPAGES val:22 [ 37.535613] ================================================================== [ 37.536576] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.537579] Read of size 8 at addr ffff88800e7acb38 by task sshd/222 [ 37.538517] [ 37.538767] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.539673] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.540722] Call Trace: [ 37.541061] [ 37.541367] dump_stack_lvl+0x91/0xf0 [ 37.541891] print_report+0xcc/0x620 [ 37.542404] ? __virt_addr_valid+0x102/0x340 [ 37.543008] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.543674] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.544330] kasan_report+0xbe/0xf0 [ 37.544832] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.545499] vma_interval_tree_remove+0xc75/0xec0 [ 37.546167] vma_prepare+0xc54/0x11a0 [ 37.546695] __split_vma+0x5af/0x950 [ 37.547210] ? __pfx___split_vma+0x10/0x10 [ 37.547794] ? find_held_lock+0x2c/0x110 [ 37.548352] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.548964] ? lock_is_held_type+0x9f/0x120 [ 37.549551] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.550207] ? mtree_range_walk+0x632/0x900 [ 37.550824] ? mas_walk+0x5c7/0x7c0 [ 37.551338] do_vmi_munmap+0x1f1/0x2b0 [ 37.551875] mmap_region+0x1f9/0x2660 [ 37.552398] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.552954] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.553744] ? __pfx_lock_acquire+0x10/0x10 [ 37.554322] ? __pfx_mmap_region+0x10/0x10 [ 37.554928] ? security_mmap_addr+0x7d/0xa0 [ 37.555508] ? get_unmapped_area+0x1f5/0x3f0 [ 37.556106] do_mmap+0x854/0xf00 [ 37.556584] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.557126] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.557741] ksys_mmap_pgoff+0x3af/0x500 [ 37.558295] do_syscall_64+0x3f/0x90 [ 37.558823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.559527] RIP: 0033:0x7f6dc6c3ed82 [ 37.560024] 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 [ 37.562303] RSP: 002b:00007fff0890b988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.563273] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6dc6c3ed82 [ 37.564176] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6dc6078000 [ 37.565067] RBP: 00007f6dc6078000 R08: 0000000000000009 R09: 0000000000001000 [ 37.565966] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648b3830ec0 [ 37.566885] R13: 00007fff0890b9a0 R14: 00007fff0890b9d0 R15: 00007fff0890bd30 [ 37.567812] [ 37.568129] [ 37.568367] Allocated by task 215: [ 37.568838] kasan_save_stack+0x22/0x50 [ 37.569397] kasan_set_track+0x25/0x30 [ 37.569933] __kasan_slab_alloc+0x59/0x70 [ 37.570507] kmem_cache_alloc+0x16b/0x370 [ 37.571084] vm_area_dup+0x20/0x160 [ 37.571585] __split_vma+0x170/0x950 [ 37.572096] split_vma+0xc6/0x110 [ 37.572582] mprotect_fixup+0x8d2/0xb30 [ 37.573135] do_mprotect_pkey+0x87e/0xd40 [ 37.573707] __x64_sys_mprotect+0x78/0xc0 [ 37.574276] do_syscall_64+0x3f/0x90 [ 37.574800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.575504] [ 37.575741] Freed by task 215: [ 37.576169] kasan_save_stack+0x22/0x50 [ 37.576725] kasan_set_track+0x25/0x30 [ 37.577264] kasan_save_free_info+0x2b/0x50 [ 37.577850] __kasan_slab_free+0x10a/0x190 [ 37.578435] kmem_cache_free+0x10d/0x4d0 [ 37.579011] rcu_core+0x8c8/0x2860 [ 37.579502] __do_softirq+0x1b7/0x7d4 [ 37.580021] [ 37.580255] Last potentially related work creation: [ 37.580901] kasan_save_stack+0x22/0x50 [ 37.581459] __kasan_record_aux_stack+0x8e/0xa0 [ 37.582083] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.582797] remove_vma+0x139/0x170 [ 37.583295] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.583912] do_vmi_munmap+0x1f1/0x2b0 [ 37.584452] __vm_munmap+0x138/0x3a0 [ 37.584958] __x64_sys_munmap+0x59/0x80 [ 37.585503] do_syscall_64+0x3f/0x90 [ 37.586015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.586727] [ 37.586962] The buggy address belongs to the object at ffff88800e7acae0 [ 37.586962] which belongs to the cache vm_area_struct of size 168 [ 37.588574] The buggy address is located 88 bytes inside of [ 37.588574] freed 168-byte region [ffff88800e7acae0, ffff88800e7acb88) [ 37.590109] [ 37.590343] The buggy address belongs to the physical page: [ 37.591093] page:0000000002674c0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7ac [ 37.592270] memcg:ffff888019c54c01 [ 37.592741] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.593450] page_type: 0xffffffff() [ 37.593937] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.594953] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c54c01 [ 37.595945] page dumped because: kasan: bad access detected [ 37.596669] [ 37.596903] Memory state around the buggy address: [ 37.597542] ffff88800e7aca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.598485] ffff88800e7aca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 37.599423] >ffff88800e7acb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.600348] ^ [ 37.601020] ffff88800e7acb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 37.601955] ffff88800e7acc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.602907] ================================================================== [ 37.604258] Disabling lock debugging due to kernel taint [ 39.783383] BUG: Bad rss-counter state mm:00000000241df1b8 type:MM_FILEPAGES val:33 [ 39.784584] BUG: Bad rss-counter state mm:00000000241df1b8 type:MM_ANONPAGES val:22 [ 40.263453] BUG: Bad rss-counter state mm:000000001fd80fcb type:MM_FILEPAGES val:33 [ 40.264855] BUG: Bad rss-counter state mm:000000001fd80fcb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39847' (ECDSA) to the list of known hosts. 2023/06/19 18:35:43 fuzzer started 2023/06/19 18:35:43 dialing manager at localhost:44161 2023/06/19 18:35:43 checking machine... 2023/06/19 18:35:43 checking revisions... [ 40.991517] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:35:43 testing simple program... [ 41.022237] cgroup: Unknown subsys name 'net' [ 41.096959] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:35:37 Registers: info registers vcpu 0 RAX=ffffffff83634883 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001e12f30 RSI=ffffffff83634883 RDI=ffff88800f0979f0 RBP=ffff88800f0979c0 RSP=ffff88800f097920 R8 =0000000000000001 R9 =ffff88800f097968 R10=0000000000038001 R11=00000000000229dc R12=ffff88800f0979f0 R13=0000000000000000 R14=ffff888014739b40 R15=0000000000000cc0 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 00007f0744426900 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=00007f07449de0b0 CR3=000000000c524000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f51bd63cfe0 CR3=000000000c426000 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=0651d58c96ebff994b4674c7472b61d6 XMM02=ec2efd57dc4c00df000000000011bba0 XMM03=bf3e909f9c22b574000000000011bc70 XMM04=a90989f7d13ff87700000000000ae988 XMM05=125958a252404f310000000000134108 XMM06=00c3ffa147b8d85700000000001331a8 XMM07=e042d86d42eb936e00000000001239d8 XMM08=bf3e909f9c22b574000000000011bc70 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000