syzkaller login: [ 31.999671] BUG: Bad rss-counter state mm:000000009fc984b1 type:MM_FILEPAGES val:33 [ 32.000928] BUG: Bad rss-counter state mm:000000009fc984b1 type:MM_ANONPAGES val:22 [ 32.149255] ================================================================== [ 32.150351] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.151458] Read of size 8 at addr ffff888015c82058 by task sshd/222 [ 32.152476] [ 32.152736] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.153619] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.154625] Call Trace: [ 32.154952] [ 32.155236] dump_stack_lvl+0x91/0xf0 [ 32.155728] print_report+0xcc/0x620 [ 32.156223] ? __virt_addr_valid+0x102/0x340 [ 32.156789] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.157419] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.158051] kasan_report+0xbe/0xf0 [ 32.158529] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.159149] vma_interval_tree_remove+0xc75/0xec0 [ 32.159750] vma_prepare+0xc54/0x11a0 [ 32.160228] __split_vma+0x5af/0x950 [ 32.160709] ? __pfx___split_vma+0x10/0x10 [ 32.161246] ? find_held_lock+0x2c/0x110 [ 32.161768] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.162349] ? lock_is_held_type+0x9f/0x120 [ 32.162886] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.163487] ? mtree_range_walk+0x632/0x900 [ 32.164043] ? mas_walk+0x5c7/0x7c0 [ 32.164525] do_vmi_munmap+0x1f1/0x2b0 [ 32.165025] mmap_region+0x1f9/0x2660 [ 32.165502] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.166038] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.166760] ? __pfx_lock_acquire+0x10/0x10 [ 32.167301] ? __pfx_mmap_region+0x10/0x10 [ 32.167832] ? security_mmap_addr+0x7d/0xa0 [ 32.168362] ? get_unmapped_area+0x1f5/0x3f0 [ 32.168906] do_mmap+0x854/0xf00 [ 32.169345] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.169841] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.170418] ksys_mmap_pgoff+0x3af/0x500 [ 32.170925] do_syscall_64+0x3f/0x90 [ 32.171406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.172054] RIP: 0033:0x7f369a270d82 [ 32.172511] 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 [ 32.174639] RSP: 002b:00007fff55029568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.175545] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f369a270d82 [ 32.176408] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36996aa000 [ 32.177264] RBP: 00007f36996aa000 R08: 0000000000000009 R09: 0000000000001000 [ 32.178128] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564af3af5ec0 [ 32.178982] R13: 00007fff55029580 R14: 00007fff550295b0 R15: 00007fff55029910 [ 32.179851] [ 32.180141] [ 32.180354] Allocated by task 215: [ 32.180789] kasan_save_stack+0x22/0x50 [ 32.181302] kasan_set_track+0x25/0x30 [ 32.181802] __kasan_slab_alloc+0x59/0x70 [ 32.182364] kmem_cache_alloc+0x16b/0x370 [ 32.182910] vm_area_dup+0x20/0x160 [ 32.183367] __split_vma+0x170/0x950 [ 32.183842] split_vma+0xc6/0x110 [ 32.184288] mprotect_fixup+0x8d2/0xb30 [ 32.184805] do_mprotect_pkey+0x87e/0xd40 [ 32.185336] __x64_sys_mprotect+0x78/0xc0 [ 32.185868] do_syscall_64+0x3f/0x90 [ 32.186370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.187034] [ 32.187249] Freed by task 215: [ 32.187645] kasan_save_stack+0x22/0x50 [ 32.188153] kasan_set_track+0x25/0x30 [ 32.188656] kasan_save_free_info+0x2b/0x50 [ 32.189194] __kasan_slab_free+0x10a/0x190 [ 32.189736] kmem_cache_free+0x10d/0x4d0 [ 32.190267] rcu_core+0x8c8/0x2860 [ 32.190709] __do_softirq+0x1b7/0x7d4 [ 32.191191] [ 32.191408] Last potentially related work creation: [ 32.191989] kasan_save_stack+0x22/0x50 [ 32.192495] __kasan_record_aux_stack+0x8e/0xa0 [ 32.193075] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.193722] remove_vma+0x139/0x170 [ 32.194208] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.194764] do_vmi_munmap+0x1f1/0x2b0 [ 32.195253] __vm_munmap+0x138/0x3a0 [ 32.195715] __x64_sys_munmap+0x59/0x80 [ 32.196212] do_syscall_64+0x3f/0x90 [ 32.196689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.197325] [ 32.197545] The buggy address belongs to the object at ffff888015c82000 [ 32.197545] which belongs to the cache vm_area_struct of size 168 [ 32.199032] The buggy address is located 88 bytes inside of [ 32.199032] freed 168-byte region [ffff888015c82000, ffff888015c820a8) [ 32.200421] [ 32.200641] The buggy address belongs to the physical page: [ 32.201295] page:000000004fc8f84c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c82 [ 32.202405] memcg:ffff88800c559901 [ 32.202829] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.203481] page_type: 0xffffffff() [ 32.203933] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.204853] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c559901 [ 32.205753] page dumped because: kasan: bad access detected [ 32.206437] [ 32.206653] Memory state around the buggy address: [ 32.207236] ffff888015c81f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.208088] ffff888015c81f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.208954] >ffff888015c82000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.209815] ^ [ 32.210547] ffff888015c82080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.211408] ffff888015c82100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.212269] ================================================================== [ 32.213240] Disabling lock debugging due to kernel taint [ 34.066873] BUG: Bad rss-counter state mm:000000004766f1cf type:MM_FILEPAGES val:33 [ 34.067873] BUG: Bad rss-counter state mm:000000004766f1cf type:MM_ANONPAGES val:22 [ 34.361859] BUG: Bad rss-counter state mm:0000000054c46d74 type:MM_FILEPAGES val:33 [ 34.362885] BUG: Bad rss-counter state mm:0000000054c46d74 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13912' (ECDSA) to the list of known hosts. 2023/06/20 13:24:05 fuzzer started 2023/06/20 13:24:06 dialing manager at localhost:36067 2023/06/20 13:24:06 checking machine... 2023/06/20 13:24:06 checking revisions... [ 35.065233] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:24:06 testing simple program... [ 35.112256] cgroup: Unknown subsys name 'net' [ 35.202901] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:24:05 Registers: info registers vcpu 0 RAX=ffffed1002dc26f0 RBX=ffff888016e13780 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffed1002dc270d RBP=00000000000000e8 RSP=ffff88801cd576d0 R8 =0000000000042a50 R9 =0000000000000000 R10=ffffed1002dc26f0 R11=ffff888016e13780 R12=ffff888016e13780 R13=00000000000128c0 R14=00000000000128c0 R15=00000000000128c0 RIP=ffffffff81810107 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 00007f63f16c2900 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=00007ffe7e0e3000 CR3=0000000016e66000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f89d0dbab60 CR3=0000000013bf6000 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=fdb9423b02d9efa58b4738a79c6ce785 XMM02=000000000011dea8eff9b2d0a8fce9cb XMM03=000000000011df782c67c8bc2e329bc3 XMM04=c80e9e0ea8379c9500000000000ae988 XMM05=59d5b690e0af863b0000000000132440 XMM06=4db41cd50846951300000000001312a8 XMM07=e042d86d42eb936e0000000000122880 XMM08=d88f1281f94885ab000000000011df78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000