syzkaller login: [ 31.159691] BUG: Bad rss-counter state mm:0000000007436105 type:MM_FILEPAGES val:33 [ 31.160907] BUG: Bad rss-counter state mm:0000000007436105 type:MM_ANONPAGES val:22 [ 31.221373] ================================================================== [ 31.222267] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.223211] Read of size 8 at addr ffff88801a020d08 by task sshd/220 [ 31.223984] [ 31.224199] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.225058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.226024] Call Trace: [ 31.226343] [ 31.226623] dump_stack_lvl+0x91/0xf0 [ 31.227109] print_report+0xcc/0x620 [ 31.227596] ? __virt_addr_valid+0x102/0x340 [ 31.228147] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.228768] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.229384] kasan_report+0xbe/0xf0 [ 31.229860] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.230482] vma_interval_tree_remove+0xc75/0xec0 [ 31.231077] vma_prepare+0xc54/0x11a0 [ 31.231551] __split_vma+0x5af/0x950 [ 31.232056] ? __pfx___split_vma+0x10/0x10 [ 31.232583] ? find_held_lock+0x2c/0x110 [ 31.233231] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.233838] ? lock_is_held_type+0x9f/0x120 [ 31.234375] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.234984] ? mtree_range_walk+0x632/0x900 [ 31.235552] ? mas_walk+0x5c7/0x7c0 [ 31.236032] do_vmi_munmap+0x1f1/0x2b0 [ 31.236516] mmap_region+0x1f9/0x2660 [ 31.236995] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.237503] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.238212] ? __pfx_lock_acquire+0x10/0x10 [ 31.238744] ? __pfx_mmap_region+0x10/0x10 [ 31.239269] ? security_mmap_addr+0x7d/0xa0 [ 31.239817] ? get_unmapped_area+0x1f5/0x3f0 [ 31.240365] do_mmap+0x854/0xf00 [ 31.240799] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.241292] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.241853] ksys_mmap_pgoff+0x3af/0x500 [ 31.242359] do_syscall_64+0x3f/0x90 [ 31.242831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.243475] RIP: 0033:0x7f61f26a0d82 [ 31.243940] 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 [ 31.246044] RSP: 002b:00007ffe07d7bab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.246948] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f61f26a0d82 [ 31.247841] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61f1ada000 [ 31.248687] RBP: 00007f61f1ada000 R08: 0000000000000009 R09: 0000000000001000 [ 31.249538] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619f019ff70 [ 31.250381] R13: 00007ffe07d7bad0 R14: 00007ffe07d7bb00 R15: 00007ffe07d7be60 [ 31.251235] [ 31.251529] [ 31.251755] Allocated by task 213: [ 31.252184] kasan_save_stack+0x22/0x50 [ 31.252699] kasan_set_track+0x25/0x30 [ 31.253189] __kasan_slab_alloc+0x59/0x70 [ 31.253714] kmem_cache_alloc+0x16b/0x370 [ 31.254234] vm_area_dup+0x20/0x160 [ 31.254690] __split_vma+0x170/0x950 [ 31.255157] split_vma+0xc6/0x110 [ 31.255592] mprotect_fixup+0x8d2/0xb30 [ 31.256105] do_mprotect_pkey+0x87e/0xd40 [ 31.256629] __x64_sys_mprotect+0x78/0xc0 [ 31.257144] do_syscall_64+0x3f/0x90 [ 31.257612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.258251] [ 31.258471] Freed by task 210: [ 31.258868] kasan_save_stack+0x22/0x50 [ 31.259366] kasan_set_track+0x25/0x30 [ 31.259860] kasan_save_free_info+0x2b/0x50 [ 31.260390] __kasan_slab_free+0x10a/0x190 [ 31.260914] kmem_cache_free+0x10d/0x4d0 [ 31.261422] rcu_core+0x8c8/0x2860 [ 31.261861] __do_softirq+0x1b7/0x7d4 [ 31.262336] [ 31.262555] Last potentially related work creation: [ 31.263131] kasan_save_stack+0x22/0x50 [ 31.263628] __kasan_record_aux_stack+0x8e/0xa0 [ 31.264221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.264861] remove_vma+0x139/0x170 [ 31.265306] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.265854] do_vmi_munmap+0x1f1/0x2b0 [ 31.266330] __vm_munmap+0x138/0x3a0 [ 31.266791] __x64_sys_munmap+0x59/0x80 [ 31.267283] do_syscall_64+0x3f/0x90 [ 31.267756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.268390] [ 31.268609] The buggy address belongs to the object at ffff88801a020cb0 [ 31.268609] which belongs to the cache vm_area_struct of size 168 [ 31.270059] The buggy address is located 88 bytes inside of [ 31.270059] freed 168-byte region [ffff88801a020cb0, ffff88801a020d58) [ 31.271441] [ 31.271663] The buggy address belongs to the physical page: [ 31.272323] page:00000000ea1e1527 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a020 [ 31.273414] memcg:ffff888018660c01 [ 31.273832] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.274471] page_type: 0xffffffff() [ 31.274918] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.275843] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018660c01 [ 31.276743] page dumped because: kasan: bad access detected [ 31.277497] [ 31.277714] Memory state around the buggy address: [ 31.278282] ffff88801a020c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.279136] ffff88801a020c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.279992] >ffff88801a020d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.280837] ^ [ 31.281268] ffff88801a020d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.282112] ffff88801a020e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.282946] ================================================================== [ 31.283880] Disabling lock debugging due to kernel taint [ 33.310358] BUG: Bad rss-counter state mm:000000006ab27b5a type:MM_FILEPAGES val:33 [ 33.311363] BUG: Bad rss-counter state mm:000000006ab27b5a type:MM_ANONPAGES val:22 [ 33.798610] BUG: Bad rss-counter state mm:00000000d0971599 type:MM_FILEPAGES val:33 [ 33.799616] BUG: Bad rss-counter state mm:00000000d0971599 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49652' (ECDSA) to the list of known hosts. 2023/06/19 15:47:06 fuzzer started 2023/06/19 15:47:06 dialing manager at localhost:44161 2023/06/19 15:47:06 checking machine... 2023/06/19 15:47:06 checking revisions... [ 34.504412] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:47:06 testing simple program... [ 34.557563] cgroup: Unknown subsys name 'net' [ 34.610589] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:47:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016f9f3a0 RCX=0000000000000001 RDX=1ffff11002df3e76 RSI=ffffffff81807ebb RDI=ffff888016f9f3b0 RBP=ffff888016f9f370 RSP=ffff888016f9f2b8 R8 =0000000000000001 R9 =ffff888016f9f318 R10=0000000000038001 R11=0000000000020de7 R12=ffff888016f9f3a0 R13=0000000000000000 R14=ffff88801000b680 R15=00000000000928c0 RIP=ffffffff813ad446 RFL=00000296 [--S-AP-] 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 00007f9c15f97900 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=00007f9c1654e618 CR3=000000001cd06000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f1801a72060 CR3=0000000010128000 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=2036303a37343a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a37343a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000