syzkaller login: [ 30.540007] BUG: Bad rss-counter state mm:0000000027438f1e type:MM_FILEPAGES val:33 [ 30.541052] BUG: Bad rss-counter state mm:0000000027438f1e type:MM_ANONPAGES val:22 [ 30.574603] ================================================================== [ 30.575578] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.576638] Read of size 8 at addr ffff88800f17a310 by task sshd/220 [ 30.577515] [ 30.577789] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.578662] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.579764] Call Trace: [ 30.580081] [ 30.580364] dump_stack_lvl+0x91/0xf0 [ 30.580862] print_report+0xcc/0x620 [ 30.581376] ? __virt_addr_valid+0x102/0x340 [ 30.581933] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.582557] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.583170] kasan_report+0xbe/0xf0 [ 30.583645] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.584270] vma_interval_tree_remove+0xc75/0xec0 [ 30.584867] vma_prepare+0xc54/0x11a0 [ 30.585352] __split_vma+0x5af/0x950 [ 30.585817] ? __pfx___split_vma+0x10/0x10 [ 30.586353] ? find_held_lock+0x2c/0x110 [ 30.586865] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.587430] ? lock_is_held_type+0x9f/0x120 [ 30.587962] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.588571] ? mtree_range_walk+0x632/0x900 [ 30.589137] ? mas_walk+0x5c7/0x7c0 [ 30.589610] do_vmi_munmap+0x1f1/0x2b0 [ 30.590110] mmap_region+0x1f9/0x2660 [ 30.590612] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.591114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.591820] ? __pfx_lock_acquire+0x10/0x10 [ 30.592343] ? __pfx_mmap_region+0x10/0x10 [ 30.592864] ? security_mmap_addr+0x7d/0xa0 [ 30.593408] ? get_unmapped_area+0x1f5/0x3f0 [ 30.593953] do_mmap+0x854/0xf00 [ 30.594389] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.594878] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.595436] ksys_mmap_pgoff+0x3af/0x500 [ 30.595936] do_syscall_64+0x3f/0x90 [ 30.596419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.597073] RIP: 0033:0x7f54eb427d82 [ 30.597532] 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 [ 30.599622] RSP: 002b:00007fffda10b6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.600513] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54eb427d82 [ 30.601374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54ea861000 [ 30.602220] RBP: 00007f54ea861000 R08: 0000000000000009 R09: 0000000000001000 [ 30.603201] R10: 0000000000000812 R11: 0000000000000206 R12: 000056384af79ec0 [ 30.604054] R13: 00007fffda10b6f0 R14: 00007fffda10b720 R15: 00007fffda10ba80 [ 30.604900] [ 30.605228] [ 30.605444] Allocated by task 213: [ 30.605871] kasan_save_stack+0x22/0x50 [ 30.606377] kasan_set_track+0x25/0x30 [ 30.606874] __kasan_slab_alloc+0x59/0x70 [ 30.607400] kmem_cache_alloc+0x16b/0x370 [ 30.607920] vm_area_dup+0x20/0x160 [ 30.608377] __split_vma+0x170/0x950 [ 30.608840] split_vma+0xc6/0x110 [ 30.609312] mprotect_fixup+0x8d2/0xb30 [ 30.609805] do_mprotect_pkey+0x87e/0xd40 [ 30.610329] __x64_sys_mprotect+0x78/0xc0 [ 30.610847] do_syscall_64+0x3f/0x90 [ 30.611328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.611959] [ 30.612179] Freed by task 13: [ 30.612566] kasan_save_stack+0x22/0x50 [ 30.613077] kasan_set_track+0x25/0x30 [ 30.613568] kasan_save_free_info+0x2b/0x50 [ 30.614092] __kasan_slab_free+0x10a/0x190 [ 30.614619] kmem_cache_free+0x10d/0x4d0 [ 30.615121] rcu_core+0x8c8/0x2860 [ 30.615566] __do_softirq+0x1b7/0x7d4 [ 30.616039] [ 30.616250] Last potentially related work creation: [ 30.616830] kasan_save_stack+0x22/0x50 [ 30.617340] __kasan_record_aux_stack+0x8e/0xa0 [ 30.617905] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.618550] remove_vma+0x139/0x170 [ 30.619001] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.619557] do_vmi_munmap+0x1f1/0x2b0 [ 30.620040] __vm_munmap+0x138/0x3a0 [ 30.620513] __x64_sys_munmap+0x59/0x80 [ 30.621024] do_syscall_64+0x3f/0x90 [ 30.621496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.622131] [ 30.622352] The buggy address belongs to the object at ffff88800f17a2b8 [ 30.622352] which belongs to the cache vm_area_struct of size 168 [ 30.623803] The buggy address is located 88 bytes inside of [ 30.623803] freed 168-byte region [ffff88800f17a2b8, ffff88800f17a360) [ 30.625206] [ 30.625432] The buggy address belongs to the physical page: [ 30.626085] page:00000000953e1628 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf17a [ 30.627154] memcg:ffff888009641001 [ 30.627584] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.628223] page_type: 0xffffffff() [ 30.628668] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b5480 dead000000000008 [ 30.629596] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009641001 [ 30.630495] page dumped because: kasan: bad access detected [ 30.631149] [ 30.631363] Memory state around the buggy address: [ 30.631937] ffff88800f17a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.632786] ffff88800f17a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.633639] >ffff88800f17a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.634478] ^ [ 30.634946] ffff88800f17a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.635783] ffff88800f17a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.636620] ================================================================== [ 30.637629] Disabling lock debugging due to kernel taint [ 32.967586] BUG: Bad rss-counter state mm:00000000de75cb00 type:MM_FILEPAGES val:33 [ 32.968750] BUG: Bad rss-counter state mm:00000000de75cb00 type:MM_ANONPAGES val:22 [ 33.436584] BUG: Bad rss-counter state mm:00000000c10cf7a9 type:MM_FILEPAGES val:33 [ 33.437754] BUG: Bad rss-counter state mm:00000000c10cf7a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17156' (ECDSA) to the list of known hosts. 2023/06/20 21:35:17 fuzzer started 2023/06/20 21:35:17 dialing manager at localhost:36067 2023/06/20 21:35:17 checking machine... 2023/06/20 21:35:17 checking revisions... [ 34.063755] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:35:17 testing simple program... [ 34.122094] cgroup: Unknown subsys name 'net' [ 34.198101] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:35:17 Registers: info registers vcpu 0 RAX=1ffffffff0bc04ae RBX=ffffffff85e02570 RCX=ffffffff8184725b RDX=0000000000000000 RSI=ffffffff8613f678 RDI=ffffffff85e02564 RBP=ffffffff85e02564 RSP=ffff888017dc77c0 R8 =ffffffff8613f678 R9 =ffff888017dc78b8 R10=0000000000038001 R11=0000000000021ee8 R12=ffffffff85e02580 R13=ffffffff85e02564 R14=ffffffff85e02564 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f1bdbaa0900 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=00007f1bdc055650 CR3=000000000e3cc000 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=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff813782f8 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a88 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888010309b40 R15=ffff88800e61ab30 RIP=ffffffff813ad47f RFL=00000282 [--S----] 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 00007f40e61bc900 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=00007f40e5640f10 CR3=000000000cc90000 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=7c758387403810b0094b7b1b29cee323 XMM02=000000000011ac40eff9b2d0a8fce9cb XMM03=000000000011ad102c67c8bc2e329bc3 XMM04=032833422842439d00000000000ae988 XMM05=57d5af13d9de539f00000000001330e0 XMM06=19e9129bd510f2350000000000131f78 XMM07=fb795ef6d65770560000000000122150 XMM08=2c67c8bc2e329bc3000000000011acb0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000