syzkaller login: [ 52.237935] BUG: Bad rss-counter state mm:000000000862b26e type:MM_FILEPAGES val:33 [ 52.239200] BUG: Bad rss-counter state mm:000000000862b26e type:MM_ANONPAGES val:22 [ 52.274373] ================================================================== [ 52.275225] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.276164] Read of size 8 at addr ffff88800e2725c8 by task sshd/222 [ 52.276818] [ 52.277005] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.277746] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.278744] Call Trace: [ 52.279104] [ 52.279431] dump_stack_lvl+0x91/0xf0 [ 52.279996] print_report+0xcc/0x620 [ 52.280462] ? __virt_addr_valid+0x102/0x340 [ 52.280942] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.281489] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.282023] kasan_report+0xbe/0xf0 [ 52.282449] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.283106] vma_interval_tree_remove+0xc75/0xec0 [ 52.283644] vma_prepare+0xc54/0x11a0 [ 52.284055] __split_vma+0x5af/0x950 [ 52.284474] ? __pfx___split_vma+0x10/0x10 [ 52.284928] ? find_held_lock+0x2c/0x110 [ 52.285363] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.285840] ? lock_is_held_type+0x9f/0x120 [ 52.286286] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.286801] ? mtree_range_walk+0x632/0x900 [ 52.287260] ? mas_walk+0x5c7/0x7c0 [ 52.287658] do_vmi_munmap+0x1f1/0x2b0 [ 52.288071] mmap_region+0x1f9/0x2660 [ 52.288469] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.288891] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.289484] ? __pfx_lock_acquire+0x10/0x10 [ 52.289925] ? __pfx_mmap_region+0x10/0x10 [ 52.290367] ? security_mmap_addr+0x7d/0xa0 [ 52.290816] ? get_unmapped_area+0x1f5/0x3f0 [ 52.291271] do_mmap+0x854/0xf00 [ 52.291636] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.292045] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.292519] ksys_mmap_pgoff+0x3af/0x500 [ 52.292939] do_syscall_64+0x3f/0x90 [ 52.293341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.293880] RIP: 0033:0x7f17ecbbfd82 [ 52.294261] 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 [ 52.296050] RSP: 002b:00007ffde3bded78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.296817] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17ecbbfd82 [ 52.297539] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17ebff9000 [ 52.298243] RBP: 00007f17ebff9000 R08: 0000000000000009 R09: 0000000000001000 [ 52.299074] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ece5fb5ec0 [ 52.299823] R13: 00007ffde3bded90 R14: 00007ffde3bdedc0 R15: 00007ffde3bdf120 [ 52.300556] [ 52.300806] [ 52.300994] Allocated by task 215: [ 52.301375] kasan_save_stack+0x22/0x50 [ 52.301811] kasan_set_track+0x25/0x30 [ 52.302228] __kasan_slab_alloc+0x59/0x70 [ 52.302689] kmem_cache_alloc+0x16b/0x370 [ 52.303130] vm_area_dup+0x20/0x160 [ 52.303544] __split_vma+0x170/0x950 [ 52.303955] split_vma+0xc6/0x110 [ 52.304320] mprotect_fixup+0x8d2/0xb30 [ 52.304761] do_mprotect_pkey+0x87e/0xd40 [ 52.305206] __x64_sys_mprotect+0x78/0xc0 [ 52.305669] do_syscall_64+0x3f/0x90 [ 52.306074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.306633] [ 52.306821] Freed by task 215: [ 52.307152] kasan_save_stack+0x22/0x50 [ 52.307609] kasan_set_track+0x25/0x30 [ 52.308049] kasan_save_free_info+0x2b/0x50 [ 52.308506] __kasan_slab_free+0x10a/0x190 [ 52.308955] kmem_cache_free+0x10d/0x4d0 [ 52.309387] rcu_core+0x8c8/0x2860 [ 52.309761] __do_softirq+0x1b7/0x7d4 [ 52.310170] [ 52.310351] Last potentially related work creation: [ 52.310849] kasan_save_stack+0x22/0x50 [ 52.311276] __kasan_record_aux_stack+0x8e/0xa0 [ 52.311767] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.312310] remove_vma+0x139/0x170 [ 52.312693] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.313167] do_vmi_munmap+0x1f1/0x2b0 [ 52.313580] __vm_munmap+0x138/0x3a0 [ 52.313976] __x64_sys_munmap+0x59/0x80 [ 52.314399] do_syscall_64+0x3f/0x90 [ 52.314803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.315350] [ 52.315538] The buggy address belongs to the object at ffff88800e272570 [ 52.315538] which belongs to the cache vm_area_struct of size 168 [ 52.316806] The buggy address is located 88 bytes inside of [ 52.316806] freed 168-byte region [ffff88800e272570, ffff88800e272618) [ 52.317990] [ 52.318175] The buggy address belongs to the physical page: [ 52.318737] page:00000000e3bf3a9f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe272 [ 52.319676] memcg:ffff888018c6e401 [ 52.320040] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.320594] page_type: 0xffffffff() [ 52.320977] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 52.321762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c6e401 [ 52.322532] page dumped because: kasan: bad access detected [ 52.323096] [ 52.323278] Memory state around the buggy address: [ 52.323775] ffff88800e272480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 52.324501] ffff88800e272500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 52.325218] >ffff88800e272580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.325933] ^ [ 52.326493] ffff88800e272600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 52.327216] ffff88800e272680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.327946] ================================================================== [ 52.328843] Disabling lock debugging due to kernel taint [ 54.485843] BUG: Bad rss-counter state mm:0000000001a4f661 type:MM_FILEPAGES val:33 [ 54.486926] BUG: Bad rss-counter state mm:0000000001a4f661 type:MM_ANONPAGES val:22 [ 54.911732] BUG: Bad rss-counter state mm:0000000016cde5be type:MM_FILEPAGES val:33 [ 54.912832] BUG: Bad rss-counter state mm:0000000016cde5be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53030' (ECDSA) to the list of known hosts. 2023/06/19 18:01:25 fuzzer started 2023/06/19 18:01:25 dialing manager at localhost:44161 2023/06/19 18:01:25 checking machine... 2023/06/19 18:01:25 checking revisions... [ 55.565196] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:01:25 testing simple program... [ 55.609895] cgroup: Unknown subsys name 'net' [ 55.660716] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:01:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a2954 RDI=ffff88801582fd28 RBP=ffff88801582fd28 RSP=ffff88801582fc60 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=00000000000000ac R13=1ffff11002b05fa7 R14=ffff88801582fe30 R15=ffffc90000646048 RIP=ffffffff815a2975 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 00007f5ae4d03900 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=000055d850a142a8 CR3=000000000f5ae000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3da1b47b2c31237000000000000ae988 XMM05=d9193e6e1db18b6c0000000000134c10 XMM06=59d5b690e0af863b0000000000133d58 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=ffff88800f28cb30 RCX=ffffffff818465f5 RDX=1ffff11001e51966 RSI=0000000000000000 RDI=ffff88800f28cb30 RBP=ffff888017ee7880 RSP=ffff888017ee77f0 R8 =0000000000000001 R9 =ffffed1001e51968 R10=ffff88800f28cb43 R11=0000000000000000 R12=ffffffff81845c80 R13=ffffea000066fcc0 R14=ffffffff81c63f2c R15=0000000000000000 RIP=ffffffff8180edf2 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 00007f9177fff700 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=000055d850a06f98 CR3=000000000fc14000 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=2035323a31303a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31303a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000