syzkaller login: [ 30.600369] BUG: Bad rss-counter state mm:00000000547bcd01 type:MM_FILEPAGES val:31 [ 30.600995] BUG: Bad rss-counter state mm:00000000547bcd01 type:MM_ANONPAGES val:22 [ 30.770614] ================================================================== [ 30.771228] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.772625] Read of size 8 at addr ffff888009d75798 by task sshd/224 [ 30.773257] [ 30.773416] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.774006] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.774661] Call Trace: [ 30.774870] [ 30.775056] dump_stack_lvl+0x91/0xf0 [ 30.775376] print_report+0xcc/0x620 [ 30.776483] ? __virt_addr_valid+0x102/0x340 [ 30.777004] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.778764] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779166] kasan_report+0xbe/0xf0 [ 30.779520] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779939] vma_interval_tree_remove+0xc75/0xec0 [ 30.780341] vma_prepare+0xc54/0x11a0 [ 30.780698] __split_vma+0x5af/0x950 [ 30.781147] ? __pfx___split_vma+0x10/0x10 [ 30.781520] ? find_held_lock+0x2c/0x110 [ 30.781870] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.782237] ? lock_is_held_type+0x9f/0x120 [ 30.782588] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.782977] ? mtree_range_walk+0x632/0x900 [ 30.783331] ? mas_walk+0x5c7/0x7c0 [ 30.783685] do_vmi_munmap+0x1f1/0x2b0 [ 30.784155] mmap_region+0x1f9/0x2660 [ 30.784479] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.784811] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.785443] ? __pfx_lock_acquire+0x10/0x10 [ 30.785786] ? __pfx_mmap_region+0x10/0x10 [ 30.786122] ? security_mmap_addr+0x7d/0xa0 [ 30.786485] ? get_unmapped_area+0x1f5/0x3f0 [ 30.786860] do_mmap+0x854/0xf00 [ 30.787145] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.787493] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.787878] ksys_mmap_pgoff+0x3af/0x500 [ 30.788201] do_syscall_64+0x3f/0x90 [ 30.788543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789233] RIP: 0033:0x7fe002a07d82 [ 30.791912] 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 [ 30.793458] RSP: 002b:00007ffeeb1d0cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.794037] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe002a07d82 [ 30.794610] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe001e41000 [ 30.795143] RBP: 00007fe001e41000 R08: 0000000000000009 R09: 0000000000001000 [ 30.795728] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585f8b66b20 [ 30.796294] R13: 00007ffeeb1d0cf0 R14: 00007ffeeb1d0d20 R15: 00007ffeeb1d1080 [ 30.796995] [ 30.797197] [ 30.797335] Allocated by task 215: [ 30.797658] kasan_save_stack+0x22/0x50 [ 30.797986] kasan_set_track+0x25/0x30 [ 30.798327] __kasan_slab_alloc+0x59/0x70 [ 30.798710] kmem_cache_alloc+0x16b/0x370 [ 30.799059] vm_area_dup+0x20/0x160 [ 30.799371] __split_vma+0x170/0x950 [ 30.799749] split_vma+0xc6/0x110 [ 30.800049] mprotect_fixup+0x8d2/0xb30 [ 30.800413] do_mprotect_pkey+0x87e/0xd40 [ 30.800784] __x64_sys_mprotect+0x78/0xc0 [ 30.801258] do_syscall_64+0x3f/0x90 [ 30.801630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802069] [ 30.802215] Freed by task 215: [ 30.802484] kasan_save_stack+0x22/0x50 [ 30.802833] kasan_set_track+0x25/0x30 [ 30.803161] kasan_save_free_info+0x2b/0x50 [ 30.803532] __kasan_slab_free+0x10a/0x190 [ 30.803894] kmem_cache_free+0x10d/0x4d0 [ 30.804219] rcu_core+0x8c8/0x2860 [ 30.804529] __do_softirq+0x1b7/0x7d4 [ 30.804857] [ 30.805001] Last potentially related work creation: [ 30.805378] kasan_save_stack+0x22/0x50 [ 30.805708] __kasan_record_aux_stack+0x8e/0xa0 [ 30.806095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.806566] remove_vma+0x139/0x170 [ 30.806878] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.807242] do_vmi_munmap+0x1f1/0x2b0 [ 30.807595] __vm_munmap+0x138/0x3a0 [ 30.807928] __x64_sys_munmap+0x59/0x80 [ 30.808265] do_syscall_64+0x3f/0x90 [ 30.808631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809053] [ 30.809198] The buggy address belongs to the object at ffff888009d75740 [ 30.809198] which belongs to the cache vm_area_struct of size 168 [ 30.810146] The buggy address is located 88 bytes inside of [ 30.810146] freed 168-byte region [ffff888009d75740, ffff888009d757e8) [ 30.811079] [ 30.811222] The buggy address belongs to the physical page: [ 30.811702] page:00000000c3e7fe89 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d75 [ 30.814386] memcg:ffff88800e1e8c01 [ 30.815188] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.816504] page_type: 0xffffffff() [ 30.817359] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.818404] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1e8c01 [ 30.819017] page dumped because: kasan: bad access detected [ 30.819464] [ 30.819613] Memory state around the buggy address: [ 30.820019] ffff888009d75680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.820611] ffff888009d75700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.821182] >ffff888009d75780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.821802] ^ [ 30.822146] ffff888009d75800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.822768] ffff888009d75880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.823341] ================================================================== [ 30.827034] Disabling lock debugging due to kernel taint [ 36.891680] BUG: Bad rss-counter state mm:00000000b2575e3e type:MM_FILEPAGES val:33 [ 36.892651] BUG: Bad rss-counter state mm:00000000b2575e3e type:MM_ANONPAGES val:22 [ 37.610822] BUG: Bad rss-counter state mm:000000007a3cf86b type:MM_FILEPAGES val:33 [ 37.611484] BUG: Bad rss-counter state mm:000000007a3cf86b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43733' (ECDSA) to the list of known hosts. 2023/06/21 10:00:22 fuzzer started 2023/06/21 10:00:22 dialing manager at localhost:36067 2023/06/21 10:00:22 checking machine... 2023/06/21 10:00:22 checking revisions... [ 38.434241] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:00:23 testing simple program... [ 38.472208] cgroup: Unknown subsys name 'net' [ 38.519690] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:00:22 Registers: info registers vcpu 0 RAX=ffffed10031f7e89 RBX=1ffff110031f7e89 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888018fbf438 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ec6 RFL=00000282 [--S----] 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 00007fc120e0e900 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=00007f9290e55328 CR3=000000000f2ae000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8161a62a RDI=0000000000000001 RBP=ffffffff848ced00 RSP=ffff888008e07d40 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=000000000001ba84 R15=0000000000000001 RIP=ffffffff8161a62f RFL=00000082 [--S----] 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=00007f1a900b2980 CR3=000000000d5cc000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=679093e9ac80bd7d00000000001328f0 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=6d636efdb4407be400000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000