syzkaller login: [ 38.001255] BUG: Bad rss-counter state mm:000000000c9666af type:MM_FILEPAGES val:33 [ 38.002836] BUG: Bad rss-counter state mm:000000000c9666af type:MM_ANONPAGES val:22 [ 38.182672] ================================================================== [ 38.183830] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.185162] Read of size 8 at addr ffff888016cc0798 by task sshd/219 [ 38.186186] [ 38.186465] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.187636] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.188958] Call Trace: [ 38.189382] [ 38.189755] dump_stack_lvl+0x91/0xf0 [ 38.190387] print_report+0xcc/0x620 [ 38.191010] ? __virt_addr_valid+0x102/0x340 [ 38.191720] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.192532] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.193333] kasan_report+0xbe/0xf0 [ 38.193935] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.194754] vma_interval_tree_remove+0xc75/0xec0 [ 38.195545] vma_prepare+0xc54/0x11a0 [ 38.196172] __split_vma+0x5af/0x950 [ 38.196807] ? __pfx___split_vma+0x10/0x10 [ 38.197495] ? find_held_lock+0x2c/0x110 [ 38.198161] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.198902] ? lock_is_held_type+0x9f/0x120 [ 38.199605] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.200406] ? mtree_range_walk+0x632/0x900 [ 38.201164] ? mas_walk+0x5c7/0x7c0 [ 38.201782] do_vmi_munmap+0x1f1/0x2b0 [ 38.202420] mmap_region+0x1f9/0x2660 [ 38.203041] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.203708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.204654] ? __pfx_lock_acquire+0x10/0x10 [ 38.205385] ? __pfx_mmap_region+0x10/0x10 [ 38.206063] ? security_mmap_addr+0x7d/0xa0 [ 38.206759] ? get_unmapped_area+0x1f5/0x3f0 [ 38.207478] do_mmap+0x854/0xf00 [ 38.208053] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.208720] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.209459] ksys_mmap_pgoff+0x3af/0x500 [ 38.210138] do_syscall_64+0x3f/0x90 [ 38.210770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.211623] RIP: 0033:0x7fe14c73bd82 [ 38.212230] 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 [ 38.214805] RSP: 002b:00007ffd162b2f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.215775] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe14c73bd82 [ 38.216698] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe14bb75000 [ 38.217603] RBP: 00007fe14bb75000 R08: 0000000000000009 R09: 0000000000001000 [ 38.218508] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e70883ec0 [ 38.219404] R13: 00007ffd162b2f30 R14: 00007ffd162b2f60 R15: 00007ffd162b32c0 [ 38.220317] [ 38.220632] [ 38.220888] Allocated by task 212: [ 38.221348] kasan_save_stack+0x22/0x50 [ 38.221886] kasan_set_track+0x25/0x30 [ 38.222424] __kasan_slab_alloc+0x59/0x70 [ 38.222996] kmem_cache_alloc+0x16b/0x370 [ 38.223546] vm_area_dup+0x20/0x160 [ 38.224037] __split_vma+0x170/0x950 [ 38.224544] split_vma+0xc6/0x110 [ 38.225042] mprotect_fixup+0x8d2/0xb30 [ 38.225639] do_mprotect_pkey+0x87e/0xd40 [ 38.226262] __x64_sys_mprotect+0x78/0xc0 [ 38.226885] do_syscall_64+0x3f/0x90 [ 38.227450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.228222] [ 38.228475] Freed by task 203: [ 38.228973] kasan_save_stack+0x22/0x50 [ 38.229570] kasan_set_track+0x25/0x30 [ 38.230156] kasan_save_free_info+0x2b/0x50 [ 38.230794] __kasan_slab_free+0x10a/0x190 [ 38.231437] kmem_cache_free+0x10d/0x4d0 [ 38.232042] rcu_core+0x8c8/0x2860 [ 38.232573] __do_softirq+0x1b7/0x7d4 [ 38.233192] [ 38.233449] Last potentially related work creation: [ 38.234150] kasan_save_stack+0x22/0x50 [ 38.234746] __kasan_record_aux_stack+0x8e/0xa0 [ 38.235430] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.236195] remove_vma+0x139/0x170 [ 38.236746] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.237406] do_vmi_munmap+0x1f1/0x2b0 [ 38.237988] __vm_munmap+0x138/0x3a0 [ 38.238542] __x64_sys_munmap+0x59/0x80 [ 38.239135] do_syscall_64+0x3f/0x90 [ 38.239702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.240471] [ 38.240754] The buggy address belongs to the object at ffff888016cc0740 [ 38.240754] which belongs to the cache vm_area_struct of size 168 [ 38.242507] The buggy address is located 88 bytes inside of [ 38.242507] freed 168-byte region [ffff888016cc0740, ffff888016cc07e8) [ 38.244183] [ 38.244444] The buggy address belongs to the physical page: [ 38.245249] page:0000000031e9d158 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cc0 [ 38.246554] memcg:ffff88800e4a0d01 [ 38.247065] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.247837] page_type: 0xffffffff() [ 38.248372] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.249491] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4a0d01 [ 38.250574] page dumped because: kasan: bad access detected [ 38.251359] [ 38.251614] Memory state around the buggy address: [ 38.252304] ffff888016cc0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.253347] ffff888016cc0700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.254367] >ffff888016cc0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.255381] ^ [ 38.255971] ffff888016cc0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.257006] ffff888016cc0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.258027] ================================================================== [ 38.259185] Disabling lock debugging due to kernel taint [ 40.288139] BUG: Bad rss-counter state mm:00000000c3cf0b00 type:MM_FILEPAGES val:33 [ 40.289322] BUG: Bad rss-counter state mm:00000000c3cf0b00 type:MM_ANONPAGES val:22 [ 40.726125] BUG: Bad rss-counter state mm:00000000a650a87d type:MM_FILEPAGES val:33 [ 40.727373] BUG: Bad rss-counter state mm:00000000a650a87d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11857' (ECDSA) to the list of known hosts. 2023/06/21 00:23:30 fuzzer started 2023/06/21 00:23:30 dialing manager at localhost:36067 2023/06/21 00:23:30 checking machine... 2023/06/21 00:23:30 checking revisions... [ 41.467895] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:23:30 testing simple program... [ 41.506890] cgroup: Unknown subsys name 'net' [ 41.546113] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:23:30 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffee4e64918 CR3=0000000005482000 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=00007f9d1d9535100000556cac3d7790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000a0 RBX=00000000000000a0 RCX=0000000000000000 RDX=0000000000010176 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800f348000 RSP=ffff888008e47420 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010176 R11=0000000000000128 R12=0000000000010176 R13=ffffed1001e69001 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff82191d9e RFL=00000093 [--S-A-C] 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=00007fc8124e5008 CR3=000000000e9e2000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000