syzkaller login: [ 33.181582] BUG: Bad rss-counter state mm:000000001b7a399f type:MM_FILEPAGES val:33 [ 33.182587] BUG: Bad rss-counter state mm:000000001b7a399f type:MM_ANONPAGES val:22 [ 33.226495] ================================================================== [ 33.227386] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.228340] Read of size 8 at addr ffff88800d8c2228 by task sshd/219 [ 33.229122] [ 33.229340] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.230220] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.231196] Call Trace: [ 33.231513] [ 33.231796] dump_stack_lvl+0x91/0xf0 [ 33.232288] print_report+0xcc/0x620 [ 33.232773] ? __virt_addr_valid+0x102/0x340 [ 33.233327] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.233975] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.234589] kasan_report+0xbe/0xf0 [ 33.235057] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.235681] vma_interval_tree_remove+0xc75/0xec0 [ 33.236282] vma_prepare+0xc54/0x11a0 [ 33.236774] __split_vma+0x5af/0x950 [ 33.237253] ? __pfx___split_vma+0x10/0x10 [ 33.237802] ? find_held_lock+0x2c/0x110 [ 33.238320] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.238888] ? lock_is_held_type+0x9f/0x120 [ 33.239428] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.240061] ? mtree_range_walk+0x632/0x900 [ 33.240615] ? mas_walk+0x5c7/0x7c0 [ 33.241083] do_vmi_munmap+0x1f1/0x2b0 [ 33.241586] mmap_region+0x1f9/0x2660 [ 33.242082] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.242592] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.243348] ? __pfx_lock_acquire+0x10/0x10 [ 33.243886] ? __pfx_mmap_region+0x10/0x10 [ 33.244429] ? security_mmap_addr+0x7d/0xa0 [ 33.244971] ? get_unmapped_area+0x1f5/0x3f0 [ 33.245556] do_mmap+0x854/0xf00 [ 33.246001] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.246509] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.247084] ksys_mmap_pgoff+0x3af/0x500 [ 33.247595] do_syscall_64+0x3f/0x90 [ 33.248082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.248741] RIP: 0033:0x7fddda401d82 [ 33.249216] 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 [ 33.251397] RSP: 002b:00007ffcf3dd8ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.252319] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fddda401d82 [ 33.253182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fddd983b000 [ 33.254063] RBP: 00007fddd983b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.254937] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cbd9df0ec0 [ 33.255805] R13: 00007ffcf3dd8f10 R14: 00007ffcf3dd8f40 R15: 00007ffcf3dd92a0 [ 33.256676] [ 33.256975] [ 33.257199] Allocated by task 212: [ 33.257661] kasan_save_stack+0x22/0x50 [ 33.258174] kasan_set_track+0x25/0x30 [ 33.258679] __kasan_slab_alloc+0x59/0x70 [ 33.259212] kmem_cache_alloc+0x16b/0x370 [ 33.259742] vm_area_dup+0x20/0x160 [ 33.260208] __split_vma+0x170/0x950 [ 33.260691] split_vma+0xc6/0x110 [ 33.261143] mprotect_fixup+0x8d2/0xb30 [ 33.261660] do_mprotect_pkey+0x87e/0xd40 [ 33.262196] __x64_sys_mprotect+0x78/0xc0 [ 33.262733] do_syscall_64+0x3f/0x90 [ 33.263211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.263865] [ 33.264082] Freed by task 19: [ 33.264474] kasan_save_stack+0x22/0x50 [ 33.264994] kasan_set_track+0x25/0x30 [ 33.265521] kasan_save_free_info+0x2b/0x50 [ 33.266064] __kasan_slab_free+0x10a/0x190 [ 33.266608] kmem_cache_free+0x10d/0x4d0 [ 33.267123] rcu_core+0x8c8/0x2860 [ 33.267573] __do_softirq+0x1b7/0x7d4 [ 33.268062] [ 33.268278] Last potentially related work creation: [ 33.268865] kasan_save_stack+0x22/0x50 [ 33.269376] __kasan_record_aux_stack+0x8e/0xa0 [ 33.269977] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.270637] remove_vma+0x139/0x170 [ 33.271097] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.271674] do_vmi_munmap+0x1f1/0x2b0 [ 33.272176] __vm_munmap+0x138/0x3a0 [ 33.272647] __x64_sys_munmap+0x59/0x80 [ 33.273151] do_syscall_64+0x3f/0x90 [ 33.273656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.274316] [ 33.274539] The buggy address belongs to the object at ffff88800d8c21d0 [ 33.274539] which belongs to the cache vm_area_struct of size 168 [ 33.276038] The buggy address is located 88 bytes inside of [ 33.276038] freed 168-byte region [ffff88800d8c21d0, ffff88800d8c2278) [ 33.277479] [ 33.277706] The buggy address belongs to the physical page: [ 33.278376] page:00000000f904dd59 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8c2 [ 33.279484] memcg:ffff888012c93c01 [ 33.279923] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.280580] page_type: 0xffffffff() [ 33.281047] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 33.282011] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888012c93c01 [ 33.282936] page dumped because: kasan: bad access detected [ 33.283613] [ 33.283838] Memory state around the buggy address: [ 33.284431] ffff88800d8c2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.285327] ffff88800d8c2180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.286218] >ffff88800d8c2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.287084] ^ [ 33.287657] ffff88800d8c2280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.288521] ffff88800d8c2300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.289390] ================================================================== [ 33.290596] Disabling lock debugging due to kernel taint [ 35.167088] BUG: Bad rss-counter state mm:0000000023be5e0c type:MM_FILEPAGES val:33 [ 35.168429] BUG: Bad rss-counter state mm:0000000023be5e0c type:MM_ANONPAGES val:22 [ 35.621949] BUG: Bad rss-counter state mm:00000000fc40631c type:MM_FILEPAGES val:33 [ 35.623091] BUG: Bad rss-counter state mm:00000000fc40631c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30501' (ECDSA) to the list of known hosts. 2023/06/19 10:51:50 fuzzer started 2023/06/19 10:51:50 dialing manager at localhost:44161 2023/06/19 10:51:50 checking machine... 2023/06/19 10:51:50 checking revisions... [ 36.362857] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:51:50 testing simple program... [ 36.417123] cgroup: Unknown subsys name 'net' [ 36.458028] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:51:47 Registers: info registers vcpu 0 RAX=1ffff11002c19f27 RBX=0000000000000003 RCX=0000000000000001 RDX=0000000000092cc0 RSI=0000000000000012 RDI=ffff8880160cf938 RBP=dffffc0000000000 RSP=ffff8880160cf890 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000012 R13=0000000000092cc0 R14=ffff8880160cf920 R15=0000000000092cc0 RIP=ffffffff813ad5ca 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 00007f22a016e900 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=00007ffff456d000 CR3=000000000d6fe000 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=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 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=ffff888008c58400 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=00007f31109f6510 CR3=000000000c550000 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=2030353a31353a3031203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a31353a3031203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000