syzkaller login: [ 43.997039] BUG: Bad rss-counter state mm:000000007b7aa44f type:MM_FILEPAGES val:33 [ 43.998054] BUG: Bad rss-counter state mm:000000007b7aa44f type:MM_ANONPAGES val:22 [ 44.169277] ================================================================== [ 44.170442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.171751] Read of size 8 at addr ffff88800d7dd228 by task sshd/220 [ 44.172590] [ 44.172828] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.173789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.174854] Call Trace: [ 44.175204] [ 44.175517] dump_stack_lvl+0x91/0xf0 [ 44.176055] print_report+0xcc/0x620 [ 44.176584] ? __virt_addr_valid+0x102/0x340 [ 44.177193] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.177878] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.178555] kasan_report+0xbe/0xf0 [ 44.179079] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.179762] vma_interval_tree_remove+0xc75/0xec0 [ 44.180443] vma_prepare+0xc54/0x11a0 [ 44.180985] __split_vma+0x5af/0x950 [ 44.181518] ? __pfx___split_vma+0x10/0x10 [ 44.182124] ? find_held_lock+0x2c/0x110 [ 44.182690] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.183337] ? lock_is_held_type+0x9f/0x120 [ 44.183953] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.184630] ? mtree_range_walk+0x632/0x900 [ 44.185253] ? mas_walk+0x5c7/0x7c0 [ 44.185769] do_vmi_munmap+0x1f1/0x2b0 [ 44.186315] mmap_region+0x1f9/0x2660 [ 44.186837] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.187393] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.188169] ? __pfx_lock_acquire+0x10/0x10 [ 44.188749] ? __pfx_mmap_region+0x10/0x10 [ 44.189320] ? security_mmap_addr+0x7d/0xa0 [ 44.189910] ? get_unmapped_area+0x1f5/0x3f0 [ 44.190515] do_mmap+0x854/0xf00 [ 44.190991] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.191527] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.192140] ksys_mmap_pgoff+0x3af/0x500 [ 44.192691] do_syscall_64+0x3f/0x90 [ 44.193218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.193926] RIP: 0033:0x7f1892bc4d82 [ 44.194422] 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 [ 44.196719] RSP: 002b:00007fffcd16cdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.197692] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1892bc4d82 [ 44.198630] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1891ffe000 [ 44.199557] RBP: 00007f1891ffe000 R08: 0000000000000009 R09: 0000000000001000 [ 44.200478] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d42033ec0 [ 44.201399] R13: 00007fffcd16ce10 R14: 00007fffcd16ce40 R15: 00007fffcd16d1a0 [ 44.202337] [ 44.202654] [ 44.202887] Allocated by task 212: [ 44.203345] kasan_save_stack+0x22/0x50 [ 44.203893] kasan_set_track+0x25/0x30 [ 44.204427] __kasan_slab_alloc+0x59/0x70 [ 44.204991] kmem_cache_alloc+0x16b/0x370 [ 44.205545] vm_area_dup+0x20/0x160 [ 44.206048] __split_vma+0x170/0x950 [ 44.206551] split_vma+0xc6/0x110 [ 44.207031] mprotect_fixup+0x8d2/0xb30 [ 44.207572] do_mprotect_pkey+0x87e/0xd40 [ 44.208135] __x64_sys_mprotect+0x78/0xc0 [ 44.208696] do_syscall_64+0x3f/0x90 [ 44.209209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.209923] [ 44.210154] Freed by task 210: [ 44.210576] kasan_save_stack+0x22/0x50 [ 44.211118] kasan_set_track+0x25/0x30 [ 44.211649] kasan_save_free_info+0x2b/0x50 [ 44.212216] __kasan_slab_free+0x10a/0x190 [ 44.212783] kmem_cache_free+0x10d/0x4d0 [ 44.213415] rcu_core+0x8c8/0x2860 [ 44.213901] __do_softirq+0x1b7/0x7d4 [ 44.214413] [ 44.214645] Last potentially related work creation: [ 44.215269] kasan_save_stack+0x22/0x50 [ 44.215804] __kasan_record_aux_stack+0x8e/0xa0 [ 44.216422] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.217106] remove_vma+0x139/0x170 [ 44.217593] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.218193] do_vmi_munmap+0x1f1/0x2b0 [ 44.218715] __vm_munmap+0x138/0x3a0 [ 44.219212] __x64_sys_munmap+0x59/0x80 [ 44.219741] do_syscall_64+0x3f/0x90 [ 44.220249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.220933] [ 44.221163] The buggy address belongs to the object at ffff88800d7dd1d0 [ 44.221163] which belongs to the cache vm_area_struct of size 168 [ 44.222747] The buggy address is located 88 bytes inside of [ 44.222747] freed 168-byte region [ffff88800d7dd1d0, ffff88800d7dd278) [ 44.224243] [ 44.224472] The buggy address belongs to the physical page: [ 44.225180] page:0000000080616e13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7dd [ 44.226339] memcg:ffff88800d8e8f01 [ 44.226791] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.227527] page_type: 0xffffffff() [ 44.228007] raw: 0100000000000200 ffff88800879fc80 ffffea00003b1680 dead000000000003 [ 44.228984] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8e8f01 [ 44.229966] page dumped because: kasan: bad access detected [ 44.230668] [ 44.230895] Memory state around the buggy address: [ 44.231509] ffff88800d7dd100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.232421] ffff88800d7dd180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 44.233334] >ffff88800d7dd200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 44.234243] ^ [ 44.234837] ffff88800d7dd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 44.235745] ffff88800d7dd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 44.236650] ================================================================== [ 44.237718] Disabling lock debugging due to kernel taint [ 46.863823] BUG: Bad rss-counter state mm:000000008854c064 type:MM_FILEPAGES val:33 [ 46.864913] BUG: Bad rss-counter state mm:000000008854c064 type:MM_ANONPAGES val:22 [ 47.454087] BUG: Bad rss-counter state mm:00000000f7551704 type:MM_FILEPAGES val:33 [ 47.455434] BUG: Bad rss-counter state mm:00000000f7551704 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13531' (ECDSA) to the list of known hosts. 2023/06/19 23:10:37 fuzzer started 2023/06/19 23:10:37 dialing manager at localhost:44161 2023/06/19 23:10:37 checking machine... 2023/06/19 23:10:37 checking revisions... [ 48.046406] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:10:37 testing simple program... [ 48.089203] cgroup: Unknown subsys name 'net' [ 48.122882] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:10:21 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=00007fe2a5040000 CR3=000000000cd0e000 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=f6f3adc0c4a5448c47430c5bea304e0e XMM02=2c67c8bc2e329bc3000000000011f788 XMM03=fb795ef6d65770560000000000123700 XMM04=db3c11465b1e596100000000000ae988 XMM05=19e9129bd510f2350000000000133a68 XMM06=7ae4ba9514926c6500000000001328d0 XMM07=e042d86d42eb936e0000000000123980 XMM08=e2a05e9f18ecf0a6000000000011f7e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff818df7fc RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800ea17c01 RSI=ffff88800ea17cf0 RDI=ffff88800ea17cf0 RBP=ffff88800ea17920 RSP=ffff88800ea17858 R8 =ffffffff8614cbfc R9 =ffff88800ea17908 R10=0000000000038001 R11=00000000000246b2 R12=ffff88800ea17928 R13=ffff88800ea17910 R14=ffff88800ea17cf8 R15=ffff88800ea178c8 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007ff9c1458900 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=00007ffd2bf5b000 CR3=000000001ca54000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000