syzkaller login: [ 30.837975] BUG: Bad rss-counter state mm:000000005e4f25ba type:MM_FILEPAGES val:33 [ 30.839195] BUG: Bad rss-counter state mm:000000005e4f25ba type:MM_ANONPAGES val:22 [ 30.879310] ================================================================== [ 30.880582] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.881960] Read of size 8 at addr ffff88800eb65058 by task sshd/220 [ 30.882824] [ 30.883117] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.884081] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.885228] Call Trace: [ 30.885558] [ 30.885852] dump_stack_lvl+0x91/0xf0 [ 30.886342] print_report+0xcc/0x620 [ 30.886828] ? __virt_addr_valid+0x102/0x340 [ 30.887400] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.888026] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.888652] kasan_report+0xbe/0xf0 [ 30.889151] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.889782] vma_interval_tree_remove+0xc75/0xec0 [ 30.890388] vma_prepare+0xc54/0x11a0 [ 30.890870] __split_vma+0x5af/0x950 [ 30.891350] ? __pfx___split_vma+0x10/0x10 [ 30.891880] ? find_held_lock+0x2c/0x110 [ 30.892402] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.892975] ? lock_is_held_type+0x9f/0x120 [ 30.893513] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.894123] ? mtree_range_walk+0x632/0x900 [ 30.894678] ? mas_walk+0x5c7/0x7c0 [ 30.895158] do_vmi_munmap+0x1f1/0x2b0 [ 30.895649] mmap_region+0x1f9/0x2660 [ 30.896130] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.896677] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.897412] ? __pfx_lock_acquire+0x10/0x10 [ 30.897950] ? __pfx_mmap_region+0x10/0x10 [ 30.898489] ? security_mmap_addr+0x7d/0xa0 [ 30.899036] ? get_unmapped_area+0x1f5/0x3f0 [ 30.899596] do_mmap+0x854/0xf00 [ 30.900034] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.900547] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.901131] ksys_mmap_pgoff+0x3af/0x500 [ 30.901641] do_syscall_64+0x3f/0x90 [ 30.902127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.902778] RIP: 0033:0x7fd968adbd82 [ 30.903235] 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 [ 30.905549] RSP: 002b:00007ffcf89925e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.906473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd968adbd82 [ 30.907329] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd967f15000 [ 30.908197] RBP: 00007fd967f15000 R08: 0000000000000009 R09: 0000000000001000 [ 30.909063] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c221236d90 [ 30.909923] R13: 00007ffcf8992600 R14: 00007ffcf8992630 R15: 00007ffcf8992990 [ 30.910781] [ 30.911084] [ 30.911297] Allocated by task 213: [ 30.911724] kasan_save_stack+0x22/0x50 [ 30.912241] kasan_set_track+0x25/0x30 [ 30.912754] __kasan_slab_alloc+0x59/0x70 [ 30.913279] kmem_cache_alloc+0x16b/0x370 [ 30.913800] vm_area_dup+0x20/0x160 [ 30.914258] __split_vma+0x170/0x950 [ 30.914730] split_vma+0xc6/0x110 [ 30.915181] mprotect_fixup+0x8d2/0xb30 [ 30.915687] do_mprotect_pkey+0x87e/0xd40 [ 30.916210] __x64_sys_mprotect+0x78/0xc0 [ 30.916731] do_syscall_64+0x3f/0x90 [ 30.917238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.917887] [ 30.918109] Freed by task 203: [ 30.918502] kasan_save_stack+0x22/0x50 [ 30.919009] kasan_set_track+0x25/0x30 [ 30.919506] kasan_save_free_info+0x2b/0x50 [ 30.920036] __kasan_slab_free+0x10a/0x190 [ 30.920572] kmem_cache_free+0x10d/0x4d0 [ 30.921104] rcu_core+0x8c8/0x2860 [ 30.921561] __do_softirq+0x1b7/0x7d4 [ 30.922050] [ 30.922267] Last potentially related work creation: [ 30.922861] kasan_save_stack+0x22/0x50 [ 30.923370] __kasan_record_aux_stack+0x8e/0xa0 [ 30.923948] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.924596] remove_vma+0x139/0x170 [ 30.925065] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.925622] do_vmi_munmap+0x1f1/0x2b0 [ 30.926115] __vm_munmap+0x138/0x3a0 [ 30.926586] __x64_sys_munmap+0x59/0x80 [ 30.927082] do_syscall_64+0x3f/0x90 [ 30.927561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.928209] [ 30.928423] The buggy address belongs to the object at ffff88800eb65000 [ 30.928423] which belongs to the cache vm_area_struct of size 168 [ 30.929904] The buggy address is located 88 bytes inside of [ 30.929904] freed 168-byte region [ffff88800eb65000, ffff88800eb650a8) [ 30.931307] [ 30.931527] The buggy address belongs to the physical page: [ 30.932193] page:00000000ad412cab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb65 [ 30.933297] memcg:ffff88800e9b9701 [ 30.933734] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.934383] page_type: 0xffffffff() [ 30.934838] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.935764] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9b9701 [ 30.936672] page dumped because: kasan: bad access detected [ 30.937364] [ 30.937583] Memory state around the buggy address: [ 30.938162] ffff88800eb64f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 30.939030] ffff88800eb64f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.939892] >ffff88800eb65000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.940764] ^ [ 30.941490] ffff88800eb65080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.942365] ffff88800eb65100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.943237] ================================================================== [ 30.944256] Disabling lock debugging due to kernel taint [ 32.762762] BUG: Bad rss-counter state mm:00000000f6029066 type:MM_FILEPAGES val:33 [ 32.763951] BUG: Bad rss-counter state mm:00000000f6029066 type:MM_ANONPAGES val:22 [ 33.267736] BUG: Bad rss-counter state mm:0000000098815225 type:MM_FILEPAGES val:33 [ 33.268812] BUG: Bad rss-counter state mm:0000000098815225 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37120' (ECDSA) to the list of known hosts. 2023/06/20 11:56:55 fuzzer started 2023/06/20 11:56:55 dialing manager at localhost:36067 2023/06/20 11:56:55 checking machine... 2023/06/20 11:56:55 checking revisions... [ 33.960173] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:56:55 testing simple program... [ 34.010956] cgroup: Unknown subsys name 'net' [ 34.062223] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:56:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fff948f9f88 CR3=000000000e756000 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=2035353a36353a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a36353a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880161472b8 RCX=0000000000000001 RDX=1ffff11002c28e58 RSI=ffffffff83871c52 RDI=ffff8880161472c0 RBP=000000000000000a RSP=ffff8880161471d0 R8 =0000000000000001 R9 =ffff888016147230 R10=0000000000038001 R11=0000000000091be9 R12=ffff8880161472b8 R13=0000000000000000 R14=ffff888016f81b40 R15=0000000000001000 RIP=ffffffff813ad4cf RFL=00000287 [--S--PC] 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 00007f5dc9eba900 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=00007f5dca471618 CR3=000000000e6a8000 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