syzkaller login: [ 32.094818] BUG: Bad rss-counter state mm:0000000061e514f4 type:MM_FILEPAGES val:33 [ 32.096337] BUG: Bad rss-counter state mm:0000000061e514f4 type:MM_ANONPAGES val:22 [ 32.245148] ================================================================== [ 32.246091] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.247186] Read of size 8 at addr ffff88800eee2968 by task sshd/221 [ 32.248093] [ 32.248426] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.249401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.250411] Call Trace: [ 32.250744] [ 32.251025] dump_stack_lvl+0x91/0xf0 [ 32.251523] print_report+0xcc/0x620 [ 32.252014] ? __virt_addr_valid+0x102/0x340 [ 32.252594] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.253250] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.253887] kasan_report+0xbe/0xf0 [ 32.254361] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.254984] vma_interval_tree_remove+0xc75/0xec0 [ 32.255584] vma_prepare+0xc54/0x11a0 [ 32.256083] __split_vma+0x5af/0x950 [ 32.256582] ? __pfx___split_vma+0x10/0x10 [ 32.257134] ? find_held_lock+0x2c/0x110 [ 32.257703] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.258275] ? lock_is_held_type+0x9f/0x120 [ 32.258813] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.259421] ? mtree_range_walk+0x632/0x900 [ 32.259980] ? mas_walk+0x5c7/0x7c0 [ 32.260493] do_vmi_munmap+0x1f1/0x2b0 [ 32.260987] mmap_region+0x1f9/0x2660 [ 32.261464] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.262030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.262752] ? __pfx_lock_acquire+0x10/0x10 [ 32.263285] ? __pfx_mmap_region+0x10/0x10 [ 32.263823] ? security_mmap_addr+0x7d/0xa0 [ 32.264349] ? get_unmapped_area+0x1f5/0x3f0 [ 32.264904] do_mmap+0x854/0xf00 [ 32.265347] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.265852] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.266411] ksys_mmap_pgoff+0x3af/0x500 [ 32.266923] do_syscall_64+0x3f/0x90 [ 32.267432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.268096] RIP: 0033:0x7fd52e2fdd82 [ 32.268570] 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 [ 32.270720] RSP: 002b:00007ffec0d66158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.271662] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd52e2fdd82 [ 32.272543] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd52d737000 [ 32.273392] RBP: 00007fd52d737000 R08: 0000000000000009 R09: 0000000000001000 [ 32.274268] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559cda588ec0 [ 32.275156] R13: 00007ffec0d66170 R14: 00007ffec0d661a0 R15: 00007ffec0d66500 [ 32.276031] [ 32.276322] [ 32.276537] Allocated by task 214: [ 32.277006] kasan_save_stack+0x22/0x50 [ 32.277520] kasan_set_track+0x25/0x30 [ 32.278053] __kasan_slab_alloc+0x59/0x70 [ 32.278585] kmem_cache_alloc+0x16b/0x370 [ 32.279115] vm_area_dup+0x20/0x160 [ 32.279597] __split_vma+0x170/0x950 [ 32.280072] split_vma+0xc6/0x110 [ 32.280563] mprotect_fixup+0x8d2/0xb30 [ 32.281101] do_mprotect_pkey+0x87e/0xd40 [ 32.281626] __x64_sys_mprotect+0x78/0xc0 [ 32.282180] do_syscall_64+0x3f/0x90 [ 32.282657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.283319] [ 32.283538] Freed by task 214: [ 32.283939] kasan_save_stack+0x22/0x50 [ 32.284441] kasan_set_track+0x25/0x30 [ 32.284937] kasan_save_free_info+0x2b/0x50 [ 32.285508] __kasan_slab_free+0x10a/0x190 [ 32.286072] kmem_cache_free+0x10d/0x4d0 [ 32.286615] rcu_core+0x8c8/0x2860 [ 32.287092] __do_softirq+0x1b7/0x7d4 [ 32.287576] [ 32.287805] Last potentially related work creation: [ 32.288426] kasan_save_stack+0x22/0x50 [ 32.288937] __kasan_record_aux_stack+0x8e/0xa0 [ 32.289543] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.290230] remove_vma+0x139/0x170 [ 32.290684] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.291302] do_vmi_munmap+0x1f1/0x2b0 [ 32.291799] __vm_munmap+0x138/0x3a0 [ 32.292305] __x64_sys_munmap+0x59/0x80 [ 32.292816] do_syscall_64+0x3f/0x90 [ 32.293294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.293965] [ 32.294180] The buggy address belongs to the object at ffff88800eee2910 [ 32.294180] which belongs to the cache vm_area_struct of size 168 [ 32.295690] The buggy address is located 88 bytes inside of [ 32.295690] freed 168-byte region [ffff88800eee2910, ffff88800eee29b8) [ 32.297137] [ 32.297355] The buggy address belongs to the physical page: [ 32.298043] page:00000000e6b28ff8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeee2 [ 32.299184] memcg:ffff888019ebce01 [ 32.299614] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.300276] page_type: 0xffffffff() [ 32.300733] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.301665] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ebce01 [ 32.302610] page dumped because: kasan: bad access detected [ 32.303297] [ 32.303517] Memory state around the buggy address: [ 32.304117] ffff88800eee2800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.304997] ffff88800eee2880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.305901] >ffff88800eee2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.306767] ^ [ 32.307578] ffff88800eee2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.308453] ffff88800eee2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.309321] ================================================================== [ 32.310543] Disabling lock debugging due to kernel taint [ 34.276771] BUG: Bad rss-counter state mm:00000000ca5df02a type:MM_FILEPAGES val:33 [ 34.278002] BUG: Bad rss-counter state mm:00000000ca5df02a type:MM_ANONPAGES val:22 [ 34.718944] BUG: Bad rss-counter state mm:00000000f76e958a type:MM_FILEPAGES val:33 [ 34.720051] BUG: Bad rss-counter state mm:00000000f76e958a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20728' (ECDSA) to the list of known hosts. 2023/06/20 00:46:59 fuzzer started 2023/06/20 00:47:00 dialing manager at localhost:44161 2023/06/20 00:47:00 checking machine... 2023/06/20 00:47:00 checking revisions... [ 35.453680] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:47:00 testing simple program... [ 35.506120] cgroup: Unknown subsys name 'net' [ 35.542821] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:46:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801676f9c0 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88801676f928 RBP=ffff888017e09b40 RSP=ffff88801676f8d0 R8 =0000000000000002 R9 =0000000000000000 R10=ffff88801676f928 R11=00000000000b6996 R12=0000000000000000 R13=ffff88801676f950 R14=ffff888017e09b40 R15=ffff88801676f928 RIP=ffffffff8450d40a RFL=00000247 [---Z-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 00007f180a0fb900 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=00007f180a6b0650 CR3=000000000cbd6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffe9ee39c88 CR3=00000000192f6000 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=2039353a36343a3030203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a36343a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000