syzkaller login: [ 36.238432] BUG: Bad rss-counter state mm:0000000096f4cc36 type:MM_FILEPAGES val:33 [ 36.239641] BUG: Bad rss-counter state mm:0000000096f4cc36 type:MM_ANONPAGES val:22 [ 36.275733] ================================================================== [ 36.276691] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.277717] Read of size 8 at addr ffff888015a7fdf0 by task sshd/222 [ 36.278513] [ 36.278732] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.279602] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.280604] Call Trace: [ 36.280929] [ 36.281217] dump_stack_lvl+0x91/0xf0 [ 36.281711] print_report+0xcc/0x620 [ 36.282204] ? __virt_addr_valid+0x102/0x340 [ 36.282766] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.283385] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.284015] kasan_report+0xbe/0xf0 [ 36.284494] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.285121] vma_interval_tree_remove+0xc75/0xec0 [ 36.285736] vma_prepare+0xc54/0x11a0 [ 36.286233] __split_vma+0x5af/0x950 [ 36.286710] ? __pfx___split_vma+0x10/0x10 [ 36.287246] ? find_held_lock+0x2c/0x110 [ 36.287776] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.288345] ? lock_is_held_type+0x9f/0x120 [ 36.288887] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.289497] ? mtree_range_walk+0x632/0x900 [ 36.290069] ? mas_walk+0x5c7/0x7c0 [ 36.290541] do_vmi_munmap+0x1f1/0x2b0 [ 36.291039] mmap_region+0x1f9/0x2660 [ 36.291527] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.292042] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.292758] ? __pfx_lock_acquire+0x10/0x10 [ 36.293302] ? __pfx_mmap_region+0x10/0x10 [ 36.293838] ? security_mmap_addr+0x7d/0xa0 [ 36.294373] ? get_unmapped_area+0x1f5/0x3f0 [ 36.294933] do_mmap+0x854/0xf00 [ 36.295380] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.295875] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.296447] ksys_mmap_pgoff+0x3af/0x500 [ 36.296963] do_syscall_64+0x3f/0x90 [ 36.297446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.298121] RIP: 0033:0x7f3044152d82 [ 36.298580] 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 [ 36.300710] RSP: 002b:00007ffdb77af918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.301616] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3044152d82 [ 36.302480] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f304358c000 [ 36.303325] RBP: 00007f304358c000 R08: 0000000000000009 R09: 0000000000001000 [ 36.304175] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c62c0f1ec0 [ 36.305015] R13: 00007ffdb77af930 R14: 00007ffdb77af960 R15: 00007ffdb77afcc0 [ 36.305865] [ 36.306158] [ 36.306379] Allocated by task 215: [ 36.306811] kasan_save_stack+0x22/0x50 [ 36.307322] kasan_set_track+0x25/0x30 [ 36.307814] __kasan_slab_alloc+0x59/0x70 [ 36.308341] kmem_cache_alloc+0x16b/0x370 [ 36.308859] vm_area_dup+0x20/0x160 [ 36.309325] __split_vma+0x170/0x950 [ 36.309796] split_vma+0xc6/0x110 [ 36.310259] mprotect_fixup+0x8d2/0xb30 [ 36.310771] do_mprotect_pkey+0x87e/0xd40 [ 36.311299] __x64_sys_mprotect+0x78/0xc0 [ 36.311827] do_syscall_64+0x3f/0x90 [ 36.312309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.312950] [ 36.313164] Freed by task 215: [ 36.313557] kasan_save_stack+0x22/0x50 [ 36.314066] kasan_set_track+0x25/0x30 [ 36.314564] kasan_save_free_info+0x2b/0x50 [ 36.315101] __kasan_slab_free+0x10a/0x190 [ 36.315635] kmem_cache_free+0x10d/0x4d0 [ 36.316141] rcu_core+0x8c8/0x2860 [ 36.316596] __do_softirq+0x1b7/0x7d4 [ 36.317075] [ 36.317288] Last potentially related work creation: [ 36.317892] kasan_save_stack+0x22/0x50 [ 36.318398] __kasan_record_aux_stack+0x8e/0xa0 [ 36.318972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.319619] remove_vma+0x139/0x170 [ 36.320072] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.320634] do_vmi_munmap+0x1f1/0x2b0 [ 36.321118] __vm_munmap+0x138/0x3a0 [ 36.321588] __x64_sys_munmap+0x59/0x80 [ 36.322109] do_syscall_64+0x3f/0x90 [ 36.322588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.323234] [ 36.323452] The buggy address belongs to the object at ffff888015a7fd98 [ 36.323452] which belongs to the cache vm_area_struct of size 168 [ 36.324919] The buggy address is located 88 bytes inside of [ 36.324919] freed 168-byte region [ffff888015a7fd98, ffff888015a7fe40) [ 36.326356] [ 36.326575] The buggy address belongs to the physical page: [ 36.327244] page:00000000f1f39235 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a7f [ 36.328346] memcg:ffff888015a7b201 [ 36.328777] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.329428] page_type: 0xffffffff() [ 36.329895] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.330832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a7b201 [ 36.331747] page dumped because: kasan: bad access detected [ 36.332420] [ 36.332639] Memory state around the buggy address: [ 36.333219] ffff888015a7fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.334108] ffff888015a7fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.335119] >ffff888015a7fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.336047] ^ [ 36.336861] ffff888015a7fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.337718] ffff888015a7fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.338583] ================================================================== [ 36.339623] Disabling lock debugging due to kernel taint [ 38.245642] BUG: Bad rss-counter state mm:000000000ca2a0b4 type:MM_FILEPAGES val:33 [ 38.247131] BUG: Bad rss-counter state mm:000000000ca2a0b4 type:MM_ANONPAGES val:22 [ 38.750198] BUG: Bad rss-counter state mm:0000000080c74884 type:MM_FILEPAGES val:33 [ 38.751204] BUG: Bad rss-counter state mm:0000000080c74884 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56532' (ECDSA) to the list of known hosts. 2023/06/20 02:45:23 fuzzer started 2023/06/20 02:45:23 dialing manager at localhost:44161 2023/06/20 02:45:23 checking machine... 2023/06/20 02:45:23 checking revisions... [ 39.494203] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:45:23 testing simple program... [ 39.534138] cgroup: Unknown subsys name 'net' [ 39.575868] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:45:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000800604 RCX=00007f46f6b75e60 RDX=00005631e450c2b0 RSI=0000000000000001 RDI=00005631e4509350 RBP=00005631e4509350 RSP=00007fff4bdead40 R8 =00005631e452f2c0 R9 =0000000000000000 R10=00007f46f6599e10 R11=0000000000000000 R12=0000000000000006 R13=00005631e4509350 R14=0000000000000000 R15=0000000000000001 RIP=00007f46f601c954 RFL=00000202 [-------] 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 00007f46f6047900 00000000 00000000 GS =0000 0000000000000000 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=00007f46f65fc650 CR3=000000000db52000 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=ffffffffffffffffffff000000000000 XMM01=01000101010101010100ffffffffffff XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010001 RBX=1ffff1100d9e5755 RCX=0000000000000000 RDX=ffff888014758000 RSI=ffffffff813cb448 RDI=ffff88806cf2b988 RBP=ffff88806cf2b988 RSP=ffff888014757e18 R8 =0000000000000001 R9 =ffffed10028eafbf R10=0000000000000003 R11=0000000000000000 R12=0000000000000046 R13=dffffc0000000000 R14=ffff88806cf2baa8 R15=ffff88806cf2b940 RIP=ffffffff813cb449 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f043dc82900 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=00007f043d0aa260 CR3=000000001457e000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=0000000000000000646873733d4d4d4f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=89e8e514b2a1f4e000000000000ae988 XMM05=107890e9d5934a5b00000000001341d0 XMM06=59d5b690e0af863b0000000000133318 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000