syzkaller login: [ 39.018201] BUG: Bad rss-counter state mm:00000000cb966e7e type:MM_FILEPAGES val:33 [ 39.019894] BUG: Bad rss-counter state mm:00000000cb966e7e type:MM_ANONPAGES val:22 [ 39.188146] ================================================================== [ 39.189048] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.190001] Read of size 8 at addr ffff888015ef0058 by task sshd/219 [ 39.190831] [ 39.191045] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.191992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.193004] Call Trace: [ 39.193327] [ 39.193611] dump_stack_lvl+0x91/0xf0 [ 39.194097] print_report+0xcc/0x620 [ 39.194579] ? __virt_addr_valid+0x102/0x340 [ 39.195131] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.195777] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.196394] kasan_report+0xbe/0xf0 [ 39.196867] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.197485] vma_interval_tree_remove+0xc75/0xec0 [ 39.198092] vma_prepare+0xc54/0x11a0 [ 39.198571] __split_vma+0x5af/0x950 [ 39.199039] ? __pfx___split_vma+0x10/0x10 [ 39.199583] ? find_held_lock+0x2c/0x110 [ 39.200112] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.200676] ? lock_is_held_type+0x9f/0x120 [ 39.201211] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.201815] ? mtree_range_walk+0x632/0x900 [ 39.202379] ? mas_walk+0x5c7/0x7c0 [ 39.202854] do_vmi_munmap+0x1f1/0x2b0 [ 39.203396] mmap_region+0x1f9/0x2660 [ 39.203903] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.204415] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.205140] ? __pfx_lock_acquire+0x10/0x10 [ 39.205672] ? __pfx_mmap_region+0x10/0x10 [ 39.206203] ? security_mmap_addr+0x7d/0xa0 [ 39.206735] ? get_unmapped_area+0x1f5/0x3f0 [ 39.207284] do_mmap+0x854/0xf00 [ 39.207745] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.208239] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.208797] ksys_mmap_pgoff+0x3af/0x500 [ 39.209313] do_syscall_64+0x3f/0x90 [ 39.209786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.210430] RIP: 0033:0x7f64472d5d82 [ 39.210882] 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 [ 39.212988] RSP: 002b:00007ffc4b7f0018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.213883] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64472d5d82 [ 39.214720] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f644670f000 [ 39.215567] RBP: 00007f644670f000 R08: 0000000000000009 R09: 0000000000001000 [ 39.216418] R10: 0000000000000812 R11: 0000000000000206 R12: 000056163ecdcb20 [ 39.217263] R13: 00007ffc4b7f0030 R14: 00007ffc4b7f0060 R15: 00007ffc4b7f03c0 [ 39.218112] [ 39.218404] [ 39.218618] Allocated by task 212: [ 39.219047] kasan_save_stack+0x22/0x50 [ 39.219587] kasan_set_track+0x25/0x30 [ 39.220077] __kasan_slab_alloc+0x59/0x70 [ 39.220600] kmem_cache_alloc+0x16b/0x370 [ 39.221118] vm_area_dup+0x20/0x160 [ 39.221571] __split_vma+0x170/0x950 [ 39.222037] split_vma+0xc6/0x110 [ 39.222472] mprotect_fixup+0x8d2/0xb30 [ 39.222975] do_mprotect_pkey+0x87e/0xd40 [ 39.223508] __x64_sys_mprotect+0x78/0xc0 [ 39.224037] do_syscall_64+0x3f/0x90 [ 39.224505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.225148] [ 39.225364] Freed by task 212: [ 39.225752] kasan_save_stack+0x22/0x50 [ 39.226255] kasan_set_track+0x25/0x30 [ 39.226745] kasan_save_free_info+0x2b/0x50 [ 39.227281] __kasan_slab_free+0x10a/0x190 [ 39.227827] kmem_cache_free+0x10d/0x4d0 [ 39.228335] rcu_core+0x8c8/0x2860 [ 39.228780] __do_softirq+0x1b7/0x7d4 [ 39.229260] [ 39.229477] Last potentially related work creation: [ 39.230056] kasan_save_stack+0x22/0x50 [ 39.230559] __kasan_record_aux_stack+0x8e/0xa0 [ 39.231127] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.231793] remove_vma+0x139/0x170 [ 39.232246] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.232803] do_vmi_munmap+0x1f1/0x2b0 [ 39.233285] __vm_munmap+0x138/0x3a0 [ 39.233751] __x64_sys_munmap+0x59/0x80 [ 39.234248] do_syscall_64+0x3f/0x90 [ 39.234720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.235362] [ 39.235591] The buggy address belongs to the object at ffff888015ef0000 [ 39.235591] which belongs to the cache vm_area_struct of size 168 [ 39.237045] The buggy address is located 88 bytes inside of [ 39.237045] freed 168-byte region [ffff888015ef0000, ffff888015ef00a8) [ 39.238437] [ 39.238650] The buggy address belongs to the physical page: [ 39.239296] page:00000000e48f868b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ef0 [ 39.240398] memcg:ffff88800c812601 [ 39.240818] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.241513] page_type: 0xffffffff() [ 39.241959] raw: 0100000000000200 ffff88800879fc80 ffffea000037ef40 dead000000000007 [ 39.242895] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c812601 [ 39.243815] page dumped because: kasan: bad access detected [ 39.244477] [ 39.244692] Memory state around the buggy address: [ 39.245282] ffff888015eeff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.246139] ffff888015eeff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.247003] >ffff888015ef0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.247882] ^ [ 39.248610] ffff888015ef0080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.249472] ffff888015ef0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.250326] ================================================================== [ 39.251298] Disabling lock debugging due to kernel taint [ 41.247729] BUG: Bad rss-counter state mm:00000000bf8e19c1 type:MM_FILEPAGES val:33 [ 41.248903] BUG: Bad rss-counter state mm:00000000bf8e19c1 type:MM_ANONPAGES val:22 [ 41.650416] BUG: Bad rss-counter state mm:0000000053b40658 type:MM_FILEPAGES val:33 [ 41.651410] BUG: Bad rss-counter state mm:0000000053b40658 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12611' (ECDSA) to the list of known hosts. 2023/06/20 04:11:06 fuzzer started 2023/06/20 04:11:07 dialing manager at localhost:44161 2023/06/20 04:11:07 checking machine... 2023/06/20 04:11:07 checking revisions... [ 42.390954] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:11:07 testing simple program... [ 42.446391] cgroup: Unknown subsys name 'net' [ 42.520210] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:11:06 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=00007fffd73595c8 CR3=000000000fcd8000 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=2036303a31313a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a31313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf3a2c0 RCX=ffffffff81377add RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88806cf3a2d8 RSP=ffff88800dae7db0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffffffff85616740 R13=0000000000000001 R14=0000000000000080 R15=0000000000000009 RIP=ffffffff81378c02 RFL=00000283 [--S---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2f56e96900 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=00007f2f5744e0b0 CR3=000000000f612000 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=2f3a746f6f723a303a303a3a746f6f72 XMM01=0a687361622f6e69622f3a746f6f722f XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000