syzkaller login: [ 42.994094] BUG: Bad rss-counter state mm:0000000062195a8e type:MM_FILEPAGES val:33 [ 42.995598] BUG: Bad rss-counter state mm:0000000062195a8e type:MM_ANONPAGES val:22 [ 43.155386] ================================================================== [ 43.156549] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.157861] Read of size 8 at addr ffff888010148140 by task sshd/219 [ 43.158910] [ 43.159194] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.160296] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.161544] Call Trace: [ 43.161991] [ 43.162357] dump_stack_lvl+0x91/0xf0 [ 43.163022] print_report+0xcc/0x620 [ 43.163575] ? __virt_addr_valid+0x102/0x340 [ 43.164200] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.164882] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.165573] kasan_report+0xbe/0xf0 [ 43.166133] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.166863] vma_interval_tree_remove+0xc75/0xec0 [ 43.167542] vma_prepare+0xc54/0x11a0 [ 43.168078] __split_vma+0x5af/0x950 [ 43.168601] ? __pfx___split_vma+0x10/0x10 [ 43.169186] ? find_held_lock+0x2c/0x110 [ 43.169769] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.170421] ? lock_is_held_type+0x9f/0x120 [ 43.171064] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.171739] ? mtree_range_walk+0x632/0x900 [ 43.172356] ? mas_walk+0x5c7/0x7c0 [ 43.172890] do_vmi_munmap+0x1f1/0x2b0 [ 43.173444] mmap_region+0x1f9/0x2660 [ 43.173999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.174568] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.175401] ? __pfx_lock_acquire+0x10/0x10 [ 43.176005] ? __pfx_mmap_region+0x10/0x10 [ 43.176598] ? security_mmap_addr+0x7d/0xa0 [ 43.177205] ? get_unmapped_area+0x1f5/0x3f0 [ 43.177821] do_mmap+0x854/0xf00 [ 43.178336] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.178923] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.179562] ksys_mmap_pgoff+0x3af/0x500 [ 43.180132] do_syscall_64+0x3f/0x90 [ 43.180668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.181392] RIP: 0033:0x7f79f49b2d82 [ 43.181937] 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 [ 43.184516] RSP: 002b:00007ffffbff11e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.185660] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79f49b2d82 [ 43.186748] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79f3dec000 [ 43.187822] RBP: 00007f79f3dec000 R08: 0000000000000009 R09: 0000000000001000 [ 43.188852] R10: 0000000000000812 R11: 0000000000000206 R12: 000055820cbe8b20 [ 43.189927] R13: 00007ffffbff1200 R14: 00007ffffbff1230 R15: 00007ffffbff1590 [ 43.191009] [ 43.191364] [ 43.191624] Allocated by task 212: [ 43.192150] kasan_save_stack+0x22/0x50 [ 43.192762] kasan_set_track+0x25/0x30 [ 43.193371] __kasan_slab_alloc+0x59/0x70 [ 43.194033] kmem_cache_alloc+0x16b/0x370 [ 43.194655] vm_area_dup+0x20/0x160 [ 43.195243] __split_vma+0x170/0x950 [ 43.195812] split_vma+0xc6/0x110 [ 43.196340] mprotect_fixup+0x8d2/0xb30 [ 43.196971] do_mprotect_pkey+0x87e/0xd40 [ 43.197602] __x64_sys_mprotect+0x78/0xc0 [ 43.198253] do_syscall_64+0x3f/0x90 [ 43.198901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.199685] [ 43.199943] Freed by task 212: [ 43.200421] kasan_save_stack+0x22/0x50 [ 43.201027] kasan_set_track+0x25/0x30 [ 43.201620] kasan_save_free_info+0x2b/0x50 [ 43.202288] __kasan_slab_free+0x10a/0x190 [ 43.202925] kmem_cache_free+0x10d/0x4d0 [ 43.203490] rcu_core+0x8c8/0x2860 [ 43.203980] __do_softirq+0x1b7/0x7d4 [ 43.204513] [ 43.204751] Last potentially related work creation: [ 43.205395] kasan_save_stack+0x22/0x50 [ 43.205964] __kasan_record_aux_stack+0x8e/0xa0 [ 43.206601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.207346] remove_vma+0x139/0x170 [ 43.207846] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.208466] do_vmi_munmap+0x1f1/0x2b0 [ 43.209007] __vm_munmap+0x138/0x3a0 [ 43.209526] __x64_sys_munmap+0x59/0x80 [ 43.210104] do_syscall_64+0x3f/0x90 [ 43.210627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.211395] [ 43.211644] Second to last potentially related work creation: [ 43.212448] kasan_save_stack+0x22/0x50 [ 43.213022] __kasan_record_aux_stack+0x8e/0xa0 [ 43.213677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.214420] remove_vma+0x139/0x170 [ 43.214935] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.215576] do_vmi_munmap+0x1f1/0x2b0 [ 43.216165] mmap_region+0x1f9/0x2660 [ 43.216716] do_mmap+0x854/0xf00 [ 43.217204] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.217772] ksys_mmap_pgoff+0x3af/0x500 [ 43.218359] do_syscall_64+0x3f/0x90 [ 43.218893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.219615] [ 43.219898] The buggy address belongs to the object at ffff8880101480e8 [ 43.219898] which belongs to the cache vm_area_struct of size 168 [ 43.221533] The buggy address is located 88 bytes inside of [ 43.221533] freed 168-byte region [ffff8880101480e8, ffff888010148190) [ 43.223116] [ 43.223353] The buggy address belongs to the physical page: [ 43.224129] page:000000002b996ca1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10148 [ 43.225351] memcg:ffff88800d2eed01 [ 43.225834] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.226579] page_type: 0xffffffff() [ 43.227095] raw: 0100000000000200 ffff88800879fc80 ffffea00003961c0 dead000000000006 [ 43.228153] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2eed01 [ 43.229166] page dumped because: kasan: bad access detected [ 43.229914] [ 43.230159] Memory state around the buggy address: [ 43.230808] ffff888010148000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.231791] ffff888010148080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 43.232752] >ffff888010148100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.233700] ^ [ 43.234430] ffff888010148180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 43.235385] ffff888010148200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 43.236393] ================================================================== [ 43.237505] Disabling lock debugging due to kernel taint [ 45.573842] BUG: Bad rss-counter state mm:00000000d964aa73 type:MM_FILEPAGES val:33 [ 45.575106] BUG: Bad rss-counter state mm:00000000d964aa73 type:MM_ANONPAGES val:22 [ 45.983583] BUG: Bad rss-counter state mm:00000000555b48a9 type:MM_FILEPAGES val:33 [ 45.984331] BUG: Bad rss-counter state mm:00000000555b48a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36191' (ECDSA) to the list of known hosts. 2023/06/19 18:12:45 fuzzer started 2023/06/19 18:12:45 dialing manager at localhost:44161 2023/06/19 18:12:45 checking machine... 2023/06/19 18:12:45 checking revisions... [ 46.669557] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:12:45 testing simple program... [ 46.720491] cgroup: Unknown subsys name 'net' [ 46.758280] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:12:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018297e60 RCX=ffffffff83642845 RDX=ffff888010318000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888018297bf8 RSP=ffff888018297ba8 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000000c R11=0000000000000000 R12=ffff888018297cf8 R13=00007ffdce675ed4 R14=000000000000000c R15=ffff888018297cd8 RIP=ffffffff83642845 RFL=00000293 [--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 00007f881e31e900 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=00007f881e8d5618 CR3=0000000019e84000 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=ffffffff85d3d010 RBX=1ffff1100d9e13b1 RCX=ffffffff85d3d010 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806cf09d78 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b520 R15=0000000000000000 RIP=ffffffff812d8eea RFL=00000202 [-------] 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=00007f7a3587a000 CR3=000000000c9c2000 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=2a49951799732999f44460fa1f61b24e XMM02=000000000011e798eff9b2d0a8fce9cb XMM03=000000000011e8682c67c8bc2e329bc3 XMM04=78205ee70e9c844300000000000ae988 XMM05=dfcdbad4f1609c370000000000135630 XMM06=5051e74eb07408470000000000134808 XMM07=e042d86d42eb936e0000000000124ce8 XMM08=9b2f2f58b9caec9d000000000011e868 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000