syzkaller login: [ 62.001782] BUG: Bad rss-counter state mm:000000007a35e3a6 type:MM_FILEPAGES val:33 [ 62.003356] BUG: Bad rss-counter state mm:000000007a35e3a6 type:MM_ANONPAGES val:22 [ 62.165355] ================================================================== [ 62.166294] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.167216] Read of size 8 at addr ffff88800f64b310 by task sshd/222 [ 62.167958] [ 62.168171] CPU: 1 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 62.169344] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.170329] Call Trace: [ 62.170641] [ 62.170934] dump_stack_lvl+0x91/0xf0 [ 62.171416] print_report+0xcc/0x620 [ 62.171898] ? __virt_addr_valid+0x102/0x340 [ 62.172445] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.173053] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.173673] kasan_report+0xbe/0xf0 [ 62.174141] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.174758] vma_interval_tree_remove+0xc75/0xec0 [ 62.175349] vma_prepare+0xc54/0x11a0 [ 62.175819] __split_vma+0x5af/0x950 [ 62.176281] ? __pfx___split_vma+0x10/0x10 [ 62.176806] ? find_held_lock+0x2c/0x110 [ 62.177319] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.177887] ? lock_is_held_type+0x9f/0x120 [ 62.178422] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.179023] ? mtree_range_walk+0x632/0x900 [ 62.179565] ? mas_walk+0x5c7/0x7c0 [ 62.180035] do_vmi_munmap+0x1f1/0x2b0 [ 62.180519] mmap_region+0x1f9/0x2660 [ 62.180996] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.181506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.182230] ? __pfx_lock_acquire+0x10/0x10 [ 62.182754] ? __pfx_mmap_region+0x10/0x10 [ 62.183280] ? security_mmap_addr+0x7d/0xa0 [ 62.183806] ? get_unmapped_area+0x1f5/0x3f0 [ 62.184351] do_mmap+0x854/0xf00 [ 62.184786] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.185278] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.185838] ksys_mmap_pgoff+0x3af/0x500 [ 62.186338] do_syscall_64+0x3f/0x90 [ 62.186807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.187438] RIP: 0033:0x7fdebbae9d82 [ 62.187892] 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 [ 62.189988] RSP: 002b:00007fffef04f988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.190878] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdebbae9d82 [ 62.191709] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdebaf23000 [ 62.192541] RBP: 00007fdebaf23000 R08: 0000000000000009 R09: 0000000000001000 [ 62.193371] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eab15d1ec0 [ 62.194216] R13: 00007fffef04f9a0 R14: 00007fffef04f9d0 R15: 00007fffef04fd30 [ 62.195059] [ 62.195354] [ 62.195568] Allocated by task 215: [ 62.195999] kasan_save_stack+0x22/0x50 [ 62.196506] kasan_set_track+0x25/0x30 [ 62.197001] __kasan_slab_alloc+0x59/0x70 [ 62.197527] kmem_cache_alloc+0x16b/0x370 [ 62.198068] vm_area_dup+0x20/0x160 [ 62.198529] __split_vma+0x170/0x950 [ 62.199004] split_vma+0xc6/0x110 [ 62.199449] mprotect_fixup+0x8d2/0xb30 [ 62.199968] do_mprotect_pkey+0x87e/0xd40 [ 62.200490] __x64_sys_mprotect+0x78/0xc0 [ 62.201157] do_syscall_64+0x3f/0x90 [ 62.201661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.202325] [ 62.202547] Freed by task 215: [ 62.202960] kasan_save_stack+0x22/0x50 [ 62.203483] kasan_set_track+0x25/0x30 [ 62.204000] kasan_save_free_info+0x2b/0x50 [ 62.204562] __kasan_slab_free+0x10a/0x190 [ 62.205130] kmem_cache_free+0x10d/0x4d0 [ 62.205682] rcu_core+0x8c8/0x2860 [ 62.206142] __do_softirq+0x1b7/0x7d4 [ 62.206639] [ 62.206864] Last potentially related work creation: [ 62.207478] kasan_save_stack+0x22/0x50 [ 62.208000] __kasan_record_aux_stack+0x8e/0xa0 [ 62.208597] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.209269] remove_vma+0x139/0x170 [ 62.209806] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.210399] do_vmi_munmap+0x1f1/0x2b0 [ 62.210897] __vm_munmap+0x138/0x3a0 [ 62.211385] __x64_sys_munmap+0x59/0x80 [ 62.211900] do_syscall_64+0x3f/0x90 [ 62.212389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.213068] [ 62.213288] The buggy address belongs to the object at ffff88800f64b2b8 [ 62.213288] which belongs to the cache vm_area_struct of size 168 [ 62.214860] The buggy address is located 88 bytes inside of [ 62.214860] freed 168-byte region [ffff88800f64b2b8, ffff88800f64b360) [ 62.216338] [ 62.216566] The buggy address belongs to the physical page: [ 62.217338] page:00000000a53abec2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf64b [ 62.218652] memcg:ffff888016583a01 [ 62.219161] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.219956] page_type: 0xffffffff() [ 62.220437] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.221530] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016583a01 [ 62.222576] page dumped because: kasan: bad access detected [ 62.223383] [ 62.223651] Memory state around the buggy address: [ 62.224276] ffff88800f64b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 62.225232] ffff88800f64b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 62.226239] >ffff88800f64b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 62.227131] ^ [ 62.227697] ffff88800f64b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 62.228734] ffff88800f64b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 62.229786] ================================================================== [ 62.230888] Disabling lock debugging due to kernel taint [ 64.272188] BUG: Bad rss-counter state mm:00000000a5077b9f type:MM_FILEPAGES val:33 [ 64.273384] BUG: Bad rss-counter state mm:00000000a5077b9f type:MM_ANONPAGES val:22 [ 64.762933] BUG: Bad rss-counter state mm:000000001d0d941f type:MM_FILEPAGES val:33 [ 64.764089] BUG: Bad rss-counter state mm:000000001d0d941f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11621' (ECDSA) to the list of known hosts. 2023/06/20 01:18:17 fuzzer started 2023/06/20 01:18:18 dialing manager at localhost:44161 2023/06/20 01:18:18 checking machine... 2023/06/20 01:18:18 checking revisions... [ 65.400592] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:18:18 testing simple program... [ 65.447480] cgroup: Unknown subsys name 'net' [ 65.508936] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:17:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffee50dcde8 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=00007f112d22a510000055bb8f89f790 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=0000000000000001 RBX=ffff88800d897418 RCX=0000000000000001 RDX=1ffff11001b12e83 RSI=ffff88800d897f48 RDI=ffff88800d897418 RBP=ffff88800d8974b0 RSP=ffff88800d897400 R8 =0000000000000001 R9 =ffff88800d897458 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800d8974e0 R13=0000000000000000 R14=ffff888015a3d1c0 R15=0000000000092cc0 RIP=ffffffff81130368 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 00007f1fe9057900 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=00007fcf09f45650 CR3=000000000d7e0000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=285863a12d8d401200000000000ae988 XMM05=02d1e33feb7fd2ab000000000013ed48 XMM06=00c3ffa147b8d857000000000013db38 XMM07=fb795ef6d6577056000000000012e220 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000