syzkaller login: [ 46.003994] BUG: Bad rss-counter state mm:0000000007820224 type:MM_FILEPAGES val:33 [ 46.005093] BUG: Bad rss-counter state mm:0000000007820224 type:MM_ANONPAGES val:22 [ 46.197052] ================================================================== [ 46.198074] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.199085] Read of size 8 at addr ffff888018f8ed08 by task sshd/220 [ 46.200201] [ 46.200504] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.201479] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.202565] Call Trace: [ 46.202922] [ 46.203229] dump_stack_lvl+0x91/0xf0 [ 46.203762] print_report+0xcc/0x620 [ 46.204283] ? __virt_addr_valid+0x102/0x340 [ 46.204890] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.205578] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.206255] kasan_report+0xbe/0xf0 [ 46.206786] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.207455] vma_interval_tree_remove+0xc75/0xec0 [ 46.208097] vma_prepare+0xc54/0x11a0 [ 46.208604] __split_vma+0x5af/0x950 [ 46.209101] ? __pfx___split_vma+0x10/0x10 [ 46.209668] ? find_held_lock+0x2c/0x110 [ 46.210223] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.210826] ? lock_is_held_type+0x9f/0x120 [ 46.211393] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.212041] ? mtree_range_walk+0x632/0x900 [ 46.212622] ? mas_walk+0x5c7/0x7c0 [ 46.213126] do_vmi_munmap+0x1f1/0x2b0 [ 46.213661] mmap_region+0x1f9/0x2660 [ 46.214174] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.214716] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.215476] ? __pfx_lock_acquire+0x10/0x10 [ 46.216048] ? __pfx_mmap_region+0x10/0x10 [ 46.216606] ? security_mmap_addr+0x7d/0xa0 [ 46.217170] ? get_unmapped_area+0x1f5/0x3f0 [ 46.217778] do_mmap+0x854/0xf00 [ 46.218244] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.218772] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.219373] ksys_mmap_pgoff+0x3af/0x500 [ 46.219912] do_syscall_64+0x3f/0x90 [ 46.220419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.221115] RIP: 0033:0x7f2ef6fe9d82 [ 46.221607] 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 [ 46.223887] RSP: 002b:00007ffe2a8b8c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.224855] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ef6fe9d82 [ 46.225773] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ef6423000 [ 46.226691] RBP: 00007f2ef6423000 R08: 0000000000000009 R09: 0000000000001000 [ 46.227602] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ddfdab9ec0 [ 46.228510] R13: 00007ffe2a8b8c80 R14: 00007ffe2a8b8cb0 R15: 00007ffe2a8b9010 [ 46.229423] [ 46.229736] [ 46.229966] Allocated by task 213: [ 46.230431] kasan_save_stack+0x22/0x50 [ 46.230972] kasan_set_track+0x25/0x30 [ 46.231506] __kasan_slab_alloc+0x59/0x70 [ 46.232061] kmem_cache_alloc+0x16b/0x370 [ 46.232613] vm_area_dup+0x20/0x160 [ 46.233096] __split_vma+0x170/0x950 [ 46.233596] split_vma+0xc6/0x110 [ 46.234064] mprotect_fixup+0x8d2/0xb30 [ 46.234598] do_mprotect_pkey+0x87e/0xd40 [ 46.235159] __x64_sys_mprotect+0x78/0xc0 [ 46.235724] do_syscall_64+0x3f/0x90 [ 46.236228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.236915] [ 46.237144] Freed by task 210: [ 46.237581] kasan_save_stack+0x22/0x50 [ 46.238121] kasan_set_track+0x25/0x30 [ 46.238642] kasan_save_free_info+0x2b/0x50 [ 46.239213] __kasan_slab_free+0x10a/0x190 [ 46.239786] kmem_cache_free+0x10d/0x4d0 [ 46.240332] rcu_core+0x8c8/0x2860 [ 46.240814] __do_softirq+0x1b7/0x7d4 [ 46.241436] [ 46.241669] Last potentially related work creation: [ 46.242294] kasan_save_stack+0x22/0x50 [ 46.242837] __kasan_record_aux_stack+0x8e/0xa0 [ 46.243449] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.244134] remove_vma+0x139/0x170 [ 46.244612] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.245202] do_vmi_munmap+0x1f1/0x2b0 [ 46.245727] __vm_munmap+0x138/0x3a0 [ 46.246231] __x64_sys_munmap+0x59/0x80 [ 46.246760] do_syscall_64+0x3f/0x90 [ 46.247264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.247946] [ 46.248198] The buggy address belongs to the object at ffff888018f8ecb0 [ 46.248198] which belongs to the cache vm_area_struct of size 168 [ 46.249802] The buggy address is located 88 bytes inside of [ 46.249802] freed 168-byte region [ffff888018f8ecb0, ffff888018f8ed58) [ 46.251326] [ 46.251554] The buggy address belongs to the physical page: [ 46.252274] page:00000000c24d0eb9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f8e [ 46.253460] memcg:ffff88800f078b01 [ 46.253921] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.254603] page_type: 0xffffffff() [ 46.255090] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.256065] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f078b01 [ 46.257026] page dumped because: kasan: bad access detected [ 46.257744] [ 46.257971] Memory state around the buggy address: [ 46.258591] ffff888018f8ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 46.259506] ffff888018f8ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 46.260443] >ffff888018f8ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 46.261367] ^ [ 46.261832] ffff888018f8ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 46.262750] ffff888018f8ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 46.263680] ================================================================== [ 46.264682] Disabling lock debugging due to kernel taint [ 48.162610] BUG: Bad rss-counter state mm:00000000cb75385e type:MM_FILEPAGES val:33 [ 48.163670] BUG: Bad rss-counter state mm:00000000cb75385e type:MM_ANONPAGES val:22 [ 48.715212] BUG: Bad rss-counter state mm:0000000043b824d2 type:MM_FILEPAGES val:33 [ 48.716453] BUG: Bad rss-counter state mm:0000000043b824d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25848' (ECDSA) to the list of known hosts. 2023/06/19 22:45:06 fuzzer started 2023/06/19 22:45:06 dialing manager at localhost:44161 2023/06/19 22:45:06 checking machine... 2023/06/19 22:45:06 checking revisions... [ 49.420210] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:45:07 testing simple program... [ 49.477803] cgroup: Unknown subsys name 'net' [ 49.532642] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:44:51 Registers: info registers vcpu 0 RAX=1ffffffff0bf4d62 RBX=ffffffff85fa6b10 RCX=ffffffff8366cd3b RDX=0000000000000000 RSI=ffffffff863b66a0 RDI=ffffffff85fa6b0c RBP=ffffffff85fa6b0c RSP=ffff88800cbaf690 R8 =ffffffff863b66a0 R9 =ffff88800cbaf788 R10=0000000000038001 R11=000000000008b5ce R12=ffffffff85fa6b14 R13=ffffffff85fa6b0c R14=ffffffff85fa6b0c 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 00007f4dd485b900 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=00007f4dd4e12618 CR3=000000000ca42000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=1ffff1100d9e135a RDX=dffffc0000000000 RSI=ffffffff813782a8 RDI=ffff88806cf09a78 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000244c3 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff81130706 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 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=00007f52220e3830 CR3=000000000f406000 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=2036303a35343a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a35343a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000