syzkaller login: [ 38.728005] BUG: Bad rss-counter state mm:000000005a917eb9 type:MM_FILEPAGES val:33 [ 38.729414] BUG: Bad rss-counter state mm:000000005a917eb9 type:MM_ANONPAGES val:22 [ 38.878085] ================================================================== [ 38.878979] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.879860] Read of size 8 at addr ffff88800f64cb38 by task sshd/225 [ 38.880714] [ 38.880922] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.881752] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.882679] Call Trace: [ 38.882984] [ 38.883255] dump_stack_lvl+0x91/0xf0 [ 38.883718] print_report+0xcc/0x620 [ 38.884181] ? __virt_addr_valid+0x102/0x340 [ 38.884702] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885283] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885894] kasan_report+0xbe/0xf0 [ 38.886345] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.886928] vma_interval_tree_remove+0xc75/0xec0 [ 38.887493] vma_prepare+0xc54/0x11a0 [ 38.887944] __split_vma+0x5af/0x950 [ 38.888421] ? __pfx___split_vma+0x10/0x10 [ 38.888937] ? find_held_lock+0x2c/0x110 [ 38.889455] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.890014] ? lock_is_held_type+0x9f/0x120 [ 38.890555] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.891150] ? mtree_range_walk+0x632/0x900 [ 38.891701] ? mas_walk+0x5c7/0x7c0 [ 38.892172] do_vmi_munmap+0x1f1/0x2b0 [ 38.892661] mmap_region+0x1f9/0x2660 [ 38.893134] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.893638] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.894350] ? __pfx_lock_acquire+0x10/0x10 [ 38.894875] ? __pfx_mmap_region+0x10/0x10 [ 38.895401] ? security_mmap_addr+0x7d/0xa0 [ 38.895924] ? get_unmapped_area+0x1f5/0x3f0 [ 38.896473] do_mmap+0x854/0xf00 [ 38.896905] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.897403] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.897986] ksys_mmap_pgoff+0x3af/0x500 [ 38.898493] do_syscall_64+0x3f/0x90 [ 38.898973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899609] RIP: 0033:0x7fb9f9211d82 [ 38.900062] 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 [ 38.902207] RSP: 002b:00007fff91436598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.903142] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9f9211d82 [ 38.904016] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9f864b000 [ 38.904882] RBP: 00007fb9f864b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.905748] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d3092df70 [ 38.906616] R13: 00007fff914365b0 R14: 00007fff914365e0 R15: 00007fff91436940 [ 38.907482] [ 38.907779] [ 38.908003] Allocated by task 218: [ 38.908432] kasan_save_stack+0x22/0x50 [ 38.908940] kasan_set_track+0x25/0x30 [ 38.909438] __kasan_slab_alloc+0x59/0x70 [ 38.909995] kmem_cache_alloc+0x16b/0x370 [ 38.910511] vm_area_dup+0x20/0x160 [ 38.910972] __split_vma+0x170/0x950 [ 38.911442] split_vma+0xc6/0x110 [ 38.911886] mprotect_fixup+0x8d2/0xb30 [ 38.912390] do_mprotect_pkey+0x87e/0xd40 [ 38.912918] __x64_sys_mprotect+0x78/0xc0 [ 38.913464] do_syscall_64+0x3f/0x90 [ 38.913960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.914626] [ 38.914851] Freed by task 218: [ 38.915264] kasan_save_stack+0x22/0x50 [ 38.915787] kasan_set_track+0x25/0x30 [ 38.916302] kasan_save_free_info+0x2b/0x50 [ 38.916858] __kasan_slab_free+0x10a/0x190 [ 38.917407] kmem_cache_free+0x10d/0x4d0 [ 38.917957] rcu_core+0x8c8/0x2860 [ 38.918415] __do_softirq+0x1b7/0x7d4 [ 38.918908] [ 38.919132] Last potentially related work creation: [ 38.919739] kasan_save_stack+0x22/0x50 [ 38.920258] __kasan_record_aux_stack+0x8e/0xa0 [ 38.920856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.921671] remove_vma+0x139/0x170 [ 38.922146] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.922724] do_vmi_munmap+0x1f1/0x2b0 [ 38.923225] __vm_munmap+0x138/0x3a0 [ 38.923711] __x64_sys_munmap+0x59/0x80 [ 38.924229] do_syscall_64+0x3f/0x90 [ 38.924717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.925385] [ 38.925613] The buggy address belongs to the object at ffff88800f64cae0 [ 38.925613] which belongs to the cache vm_area_struct of size 168 [ 38.927131] The buggy address is located 88 bytes inside of [ 38.927131] freed 168-byte region [ffff88800f64cae0, ffff88800f64cb88) [ 38.928580] [ 38.928807] The buggy address belongs to the physical page: [ 38.929496] page:00000000ae42f17e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf64c [ 38.930617] memcg:ffff88800e7f5c01 [ 38.931049] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.931715] page_type: 0xffffffff() [ 38.932181] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.933131] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7f5c01 [ 38.934068] page dumped because: kasan: bad access detected [ 38.934750] [ 38.934971] Memory state around the buggy address: [ 38.935559] ffff88800f64ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.936431] ffff88800f64ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.937306] >ffff88800f64cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.938197] ^ [ 38.938828] ffff88800f64cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.939709] ffff88800f64cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.940580] ================================================================== [ 38.941523] Disabling lock debugging due to kernel taint [ 41.121654] BUG: Bad rss-counter state mm:00000000d3bbd235 type:MM_FILEPAGES val:33 [ 41.122747] BUG: Bad rss-counter state mm:00000000d3bbd235 type:MM_ANONPAGES val:22 [ 41.580648] BUG: Bad rss-counter state mm:00000000458f19f7 type:MM_FILEPAGES val:33 [ 41.581679] BUG: Bad rss-counter state mm:00000000458f19f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43901' (ECDSA) to the list of known hosts. 2023/06/20 19:33:26 fuzzer started 2023/06/20 19:33:27 dialing manager at localhost:36067 2023/06/20 19:33:27 checking machine... 2023/06/20 19:33:27 checking revisions... [ 42.311324] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:33:27 testing simple program... [ 42.359908] cgroup: Unknown subsys name 'net' [ 42.427189] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:33:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000003f9 RCX=0000000000000000 RDX=00000000000003f9 RSI=ffffffff825054a5 RDI=ffffffff87f6f0a0 RBP=ffffffff87f6f060 RSP=ffff88806ce09cb8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000001 R12=0000000000000000 R13=ffffffff87f6f13c R14=0000000000000005 R15=0000000000000246 RIP=ffffffff825054fd RFL=00000006 [-----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 00007fefeb588900 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=00007fefebb3f618 CR3=0000000018388000 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=ffff88800e93e000 RBX=ffff88806cf09ee8 RCX=1ffff11001d27c00 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff88806cf09ef8 RBP=0000000000000045 RSP=ffff88806cf09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff888008d951c0 R15=ffff88800e8fbb30 RIP=ffffffff8137fcd4 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 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=00007f842a8f0000 CR3=000000000caba000 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=ef2cb8c7136088bd9046e2d1f82650bd XMM02=000000000011c638ec2efd57dc4c00df XMM03=000000000012243811faa57d106a9e11 XMM04=53cdc32b2ed64fba00000000000ae988 XMM05=e7a3b750822471340000000000131fe0 XMM06=bd563814a4a47a9000000000001311b8 XMM07=e042d86d42eb936e0000000000122710 XMM08=11faa57d106a9e11000000000011c698 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000