syzkaller login: [ 51.587915] BUG: Bad rss-counter state mm:0000000001a2cf39 type:MM_FILEPAGES val:33 [ 51.589156] BUG: Bad rss-counter state mm:0000000001a2cf39 type:MM_ANONPAGES val:22 [ 51.629303] ================================================================== [ 51.630009] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.630735] Read of size 8 at addr ffff888019f8c880 by task sshd/220 [ 51.631336] [ 51.631507] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.632169] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.633093] Call Trace: [ 51.633345] [ 51.633560] dump_stack_lvl+0x91/0xf0 [ 51.633933] print_report+0xcc/0x620 [ 51.634301] ? __virt_addr_valid+0x102/0x340 [ 51.634730] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.635202] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.635695] kasan_report+0xbe/0xf0 [ 51.636060] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.636543] vma_interval_tree_remove+0xc75/0xec0 [ 51.637008] vma_prepare+0xc54/0x11a0 [ 51.637376] __split_vma+0x5af/0x950 [ 51.637744] ? __pfx___split_vma+0x10/0x10 [ 51.638148] ? find_held_lock+0x2c/0x110 [ 51.638550] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.638985] ? lock_is_held_type+0x9f/0x120 [ 51.639406] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.639869] ? mtree_range_walk+0x632/0x900 [ 51.640291] ? mas_walk+0x5c7/0x7c0 [ 51.640653] do_vmi_munmap+0x1f1/0x2b0 [ 51.641030] mmap_region+0x1f9/0x2660 [ 51.641402] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.641801] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.642351] ? __pfx_lock_acquire+0x10/0x10 [ 51.642766] ? __pfx_mmap_region+0x10/0x10 [ 51.643170] ? security_mmap_addr+0x7d/0xa0 [ 51.643585] ? get_unmapped_area+0x1f5/0x3f0 [ 51.644010] do_mmap+0x854/0xf00 [ 51.644346] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.644732] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.645164] ksys_mmap_pgoff+0x3af/0x500 [ 51.645552] do_syscall_64+0x3f/0x90 [ 51.645918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.646414] RIP: 0033:0x7f58ef628d82 [ 51.646781] 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 [ 51.648415] RSP: 002b:00007ffd60c7c338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.649019] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58ef628d82 [ 51.649581] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f58eea62000 [ 51.650151] RBP: 00007f58eea62000 R08: 0000000000000009 R09: 0000000000001000 [ 51.650716] R10: 0000000000000812 R11: 0000000000000206 R12: 000055850e83dec0 [ 51.651279] R13: 00007ffd60c7c350 R14: 00007ffd60c7c380 R15: 00007ffd60c7c6e0 [ 51.651845] [ 51.652032] [ 51.652170] Allocated by task 213: [ 51.652451] kasan_save_stack+0x22/0x50 [ 51.652778] kasan_set_track+0x25/0x30 [ 51.653101] __kasan_slab_alloc+0x59/0x70 [ 51.653446] kmem_cache_alloc+0x16b/0x370 [ 51.653782] vm_area_dup+0x20/0x160 [ 51.654076] __split_vma+0x170/0x950 [ 51.654378] split_vma+0xc6/0x110 [ 51.654665] mprotect_fixup+0x8d2/0xb30 [ 51.654990] do_mprotect_pkey+0x87e/0xd40 [ 51.655339] __x64_sys_mprotect+0x78/0xc0 [ 51.655680] do_syscall_64+0x3f/0x90 [ 51.655993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.656413] [ 51.656551] Freed by task 213: [ 51.656818] kasan_save_stack+0x22/0x50 [ 51.657150] kasan_set_track+0x25/0x30 [ 51.657472] kasan_save_free_info+0x2b/0x50 [ 51.657819] __kasan_slab_free+0x10a/0x190 [ 51.658177] kmem_cache_free+0x10d/0x4d0 [ 51.658511] rcu_core+0x8c8/0x2860 [ 51.658800] __do_softirq+0x1b7/0x7d4 [ 51.659108] [ 51.659244] Last potentially related work creation: [ 51.659658] kasan_save_stack+0x22/0x50 [ 51.659989] __kasan_record_aux_stack+0x8e/0xa0 [ 51.660366] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.660797] remove_vma+0x139/0x170 [ 51.661087] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.661456] do_vmi_munmap+0x1f1/0x2b0 [ 51.661777] __vm_munmap+0x138/0x3a0 [ 51.662079] __x64_sys_munmap+0x59/0x80 [ 51.662402] do_syscall_64+0x3f/0x90 [ 51.662707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.663123] [ 51.663261] Second to last potentially related work creation: [ 51.663725] kasan_save_stack+0x22/0x50 [ 51.664058] __kasan_record_aux_stack+0x8e/0xa0 [ 51.664441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.664856] remove_vma+0x139/0x170 [ 51.665147] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.665515] do_vmi_munmap+0x1f1/0x2b0 [ 51.665834] mmap_region+0x1f9/0x2660 [ 51.666142] do_mmap+0x854/0xf00 [ 51.666429] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.666758] ksys_mmap_pgoff+0x3af/0x500 [ 51.667090] do_syscall_64+0x3f/0x90 [ 51.667411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.667833] [ 51.667974] The buggy address belongs to the object at ffff888019f8c828 [ 51.667974] which belongs to the cache vm_area_struct of size 168 [ 51.668948] The buggy address is located 88 bytes inside of [ 51.668948] freed 168-byte region [ffff888019f8c828, ffff888019f8c8d0) [ 51.669879] [ 51.670020] The buggy address belongs to the physical page: [ 51.670455] page:0000000067103b4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f8c [ 51.671184] memcg:ffff888019f8b001 [ 51.671464] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.671884] page_type: 0xffffffff() [ 51.672180] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 51.672779] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f8b001 [ 51.673395] page dumped because: kasan: bad access detected [ 51.673841] [ 51.674068] Memory state around the buggy address: [ 51.674457] ffff888019f8c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 51.675018] ffff888019f8c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 51.675597] >ffff888019f8c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 51.676165] ^ [ 51.676445] ffff888019f8c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.677023] ffff888019f8c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 51.677589] ================================================================== [ 51.678206] Disabling lock debugging due to kernel taint [ 53.469888] BUG: Bad rss-counter state mm:000000006bc8ab0f type:MM_FILEPAGES val:33 [ 53.471012] BUG: Bad rss-counter state mm:000000006bc8ab0f type:MM_ANONPAGES val:22 [ 53.941779] BUG: Bad rss-counter state mm:00000000cfbde96e type:MM_FILEPAGES val:33 [ 53.942791] BUG: Bad rss-counter state mm:00000000cfbde96e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59871' (ECDSA) to the list of known hosts. 2023/06/19 18:57:31 fuzzer started 2023/06/19 18:57:32 dialing manager at localhost:44161 2023/06/19 18:57:32 checking machine... 2023/06/19 18:57:32 checking revisions... [ 54.645826] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:57:32 testing simple program... [ 54.690840] cgroup: Unknown subsys name 'net' [ 54.729624] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:57:10 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=ffff888008c58000 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=00007ff523b65f90 CR3=000000000e9ee000 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=266760ae494967a43e43694d9580be6e XMM02=000000000011c7e8eff9b2d0a8fce9cb XMM03=000000000011c8b82c67c8bc2e329bc3 XMM04=1e92f2d5f78d331e00000000000ae988 XMM05=005112987ddf5d0700000000001360c0 XMM06=4e3ce1e149cd10e80000000000134e60 XMM07=fb795ef6d65770560000000000124050 XMM08=2c67c8bc2e329bc3000000000011c858 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800c5a7368 RSP=ffff88800c5a72a0 R8 =ffffffff864b024a R9 =ffff88800c5a7350 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800c5a7370 R13=ffff88800c5a7358 R14=ffff88800c5a7f58 R15=ffff88800c5a7310 RIP=ffffffff81131162 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 00007f98a344e900 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=00007f98a3a05618 CR3=000000000f25e000 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