syzkaller login: [ 39.127943] BUG: Bad rss-counter state mm:000000001468632b type:MM_FILEPAGES val:33 [ 39.129221] BUG: Bad rss-counter state mm:000000001468632b type:MM_ANONPAGES val:22 [ 39.275451] ================================================================== [ 39.276479] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.277448] Read of size 8 at addr ffff888018050ed8 by task sshd/219 [ 39.278337] [ 39.278562] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.279475] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.280494] Call Trace: [ 39.280826] [ 39.281115] dump_stack_lvl+0x91/0xf0 [ 39.281615] print_report+0xcc/0x620 [ 39.282108] ? __virt_addr_valid+0x102/0x340 [ 39.282669] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.283330] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.283959] kasan_report+0xbe/0xf0 [ 39.284440] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.285068] vma_interval_tree_remove+0xc75/0xec0 [ 39.285678] vma_prepare+0xc54/0x11a0 [ 39.286165] __split_vma+0x5af/0x950 [ 39.286643] ? __pfx___split_vma+0x10/0x10 [ 39.287182] ? find_held_lock+0x2c/0x110 [ 39.287711] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.288283] ? lock_is_held_type+0x9f/0x120 [ 39.288833] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.289444] ? mtree_range_walk+0x632/0x900 [ 39.290002] ? mas_walk+0x5c7/0x7c0 [ 39.290486] do_vmi_munmap+0x1f1/0x2b0 [ 39.290985] mmap_region+0x1f9/0x2660 [ 39.291493] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.292009] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.292741] ? __pfx_lock_acquire+0x10/0x10 [ 39.293283] ? __pfx_mmap_region+0x10/0x10 [ 39.293820] ? security_mmap_addr+0x7d/0xa0 [ 39.294357] ? get_unmapped_area+0x1f5/0x3f0 [ 39.294911] do_mmap+0x854/0xf00 [ 39.295377] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.295876] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.296449] ksys_mmap_pgoff+0x3af/0x500 [ 39.296961] do_syscall_64+0x3f/0x90 [ 39.297444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.298107] RIP: 0033:0x7fdfa14c1d82 [ 39.298587] 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 [ 39.300716] RSP: 002b:00007ffe9886b9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.301613] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdfa14c1d82 [ 39.302454] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdfa08fb000 [ 39.303303] RBP: 00007fdfa08fb000 R08: 0000000000000009 R09: 0000000000001000 [ 39.304144] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585c266dec0 [ 39.304979] R13: 00007ffe9886ba10 R14: 00007ffe9886ba40 R15: 00007ffe9886bda0 [ 39.305838] [ 39.306125] [ 39.306339] Allocated by task 212: [ 39.306761] kasan_save_stack+0x22/0x50 [ 39.307272] kasan_set_track+0x25/0x30 [ 39.307766] __kasan_slab_alloc+0x59/0x70 [ 39.308285] kmem_cache_alloc+0x16b/0x370 [ 39.308804] vm_area_dup+0x20/0x160 [ 39.309256] __split_vma+0x170/0x950 [ 39.309725] split_vma+0xc6/0x110 [ 39.310164] mprotect_fixup+0x8d2/0xb30 [ 39.310664] do_mprotect_pkey+0x87e/0xd40 [ 39.311205] __x64_sys_mprotect+0x78/0xc0 [ 39.311736] do_syscall_64+0x3f/0x90 [ 39.312208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.312844] [ 39.313058] Freed by task 212: [ 39.313450] kasan_save_stack+0x22/0x50 [ 39.313950] kasan_set_track+0x25/0x30 [ 39.314439] kasan_save_free_info+0x2b/0x50 [ 39.314982] __kasan_slab_free+0x10a/0x190 [ 39.315530] kmem_cache_free+0x10d/0x4d0 [ 39.316034] rcu_core+0x8c8/0x2860 [ 39.316479] __do_softirq+0x1b7/0x7d4 [ 39.316949] [ 39.317163] Last potentially related work creation: [ 39.317745] kasan_save_stack+0x22/0x50 [ 39.318245] __kasan_record_aux_stack+0x8e/0xa0 [ 39.318816] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.319466] remove_vma+0x139/0x170 [ 39.319912] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.320462] do_vmi_munmap+0x1f1/0x2b0 [ 39.320941] __vm_munmap+0x138/0x3a0 [ 39.321415] __x64_sys_munmap+0x59/0x80 [ 39.321914] do_syscall_64+0x3f/0x90 [ 39.322383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.323022] [ 39.323249] Second to last potentially related work creation: [ 39.323928] kasan_save_stack+0x22/0x50 [ 39.324433] __kasan_record_aux_stack+0x8e/0xa0 [ 39.325005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.325655] remove_vma+0x139/0x170 [ 39.326103] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.326661] do_vmi_munmap+0x1f1/0x2b0 [ 39.327162] mmap_region+0x1f9/0x2660 [ 39.327643] do_mmap+0x854/0xf00 [ 39.328071] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.328556] ksys_mmap_pgoff+0x3af/0x500 [ 39.329055] do_syscall_64+0x3f/0x90 [ 39.329537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.330172] [ 39.330386] The buggy address belongs to the object at ffff888018050e80 [ 39.330386] which belongs to the cache vm_area_struct of size 168 [ 39.331846] The buggy address is located 88 bytes inside of [ 39.331846] freed 168-byte region [ffff888018050e80, ffff888018050f28) [ 39.333235] [ 39.333454] The buggy address belongs to the physical page: [ 39.334109] page:00000000d8c61032 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18050 [ 39.335198] memcg:ffff88800f25a701 [ 39.335618] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.336274] page_type: 0xffffffff() [ 39.336720] raw: 0100000000000200 ffff88800879fc80 ffffea00003af080 dead000000000004 [ 39.337626] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f25a701 [ 39.338527] page dumped because: kasan: bad access detected [ 39.339197] [ 39.339409] Memory state around the buggy address: [ 39.339988] ffff888018050d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.340856] ffff888018050e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.341715] >ffff888018050e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.342613] ^ [ 39.343373] ffff888018050f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.344240] ffff888018050f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.345111] ================================================================== [ 39.346079] Disabling lock debugging due to kernel taint [ 41.219681] BUG: Bad rss-counter state mm:0000000046b9fed2 type:MM_FILEPAGES val:33 [ 41.220717] BUG: Bad rss-counter state mm:0000000046b9fed2 type:MM_ANONPAGES val:22 [ 41.684589] BUG: Bad rss-counter state mm:00000000b504299c type:MM_FILEPAGES val:33 [ 41.685714] BUG: Bad rss-counter state mm:00000000b504299c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52165' (ECDSA) to the list of known hosts. 2023/06/19 18:58:39 fuzzer started 2023/06/19 18:58:39 dialing manager at localhost:44161 2023/06/19 18:58:39 checking machine... 2023/06/19 18:58:39 checking revisions... [ 42.446041] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:58:39 testing simple program... [ 42.506155] cgroup: Unknown subsys name 'net' [ 42.551278] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:58:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180f43a RDX=00000000000080f4 RSI=00000000000080f4 RDI=ffffffff86507f90 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =0000000000000000 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020d8a R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7f9b9 R15=ffff888008d7f978 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 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=00007f06a6329618 CR3=000000000daa4000 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=ffffffff81807ebb RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100304bf00 RSI=ffffffff81807ebb RDI=ffff88801825f870 RBP=ffff88801825f840 RSP=ffff88801825f7a0 R8 =0000000000000001 R9 =ffff88801825f7e8 R10=0000000000038001 R11=0000000000020de7 R12=ffff88801825f870 R13=0000000000000000 R14=ffff8880159351c0 R15=0000000000092cc0 RIP=ffffffff813ad424 RFL=00000286 [--S--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 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=00007fb78ae24a30 CR3=000000000dbcc000 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=756e696c2d34365f3638782f62696c2f XMM01=00362e6f732e6362696c2f756e672d78 XMM02=ffffffffffffffffffffffffffffffff XMM03=ffffffffffffffffffffffffffffffff XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000