syzkaller login: [ 43.041465] BUG: Bad rss-counter state mm:00000000c8dde62c type:MM_FILEPAGES val:33 [ 43.042707] BUG: Bad rss-counter state mm:00000000c8dde62c type:MM_ANONPAGES val:22 [ 43.200901] ================================================================== [ 43.201970] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.203105] Read of size 8 at addr ffff88800ddad058 by task sshd/220 [ 43.204046] [ 43.204267] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.205128] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.206117] Call Trace: [ 43.206434] [ 43.206721] dump_stack_lvl+0x91/0xf0 [ 43.207225] print_report+0xcc/0x620 [ 43.207709] ? __virt_addr_valid+0x102/0x340 [ 43.208265] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.208883] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.209499] kasan_report+0xbe/0xf0 [ 43.209977] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.210599] vma_interval_tree_remove+0xc75/0xec0 [ 43.211208] vma_prepare+0xc54/0x11a0 [ 43.211695] __split_vma+0x5af/0x950 [ 43.212170] ? __pfx___split_vma+0x10/0x10 [ 43.212701] ? find_held_lock+0x2c/0x110 [ 43.213219] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.213805] ? lock_is_held_type+0x9f/0x120 [ 43.214338] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.214969] ? mtree_range_walk+0x632/0x900 [ 43.215515] ? mas_walk+0x5c7/0x7c0 [ 43.215989] do_vmi_munmap+0x1f1/0x2b0 [ 43.216482] mmap_region+0x1f9/0x2660 [ 43.216959] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.217472] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.218189] ? __pfx_lock_acquire+0x10/0x10 [ 43.218728] ? __pfx_mmap_region+0x10/0x10 [ 43.219271] ? security_mmap_addr+0x7d/0xa0 [ 43.219803] ? get_unmapped_area+0x1f5/0x3f0 [ 43.220354] do_mmap+0x854/0xf00 [ 43.220802] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.221306] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.221873] ksys_mmap_pgoff+0x3af/0x500 [ 43.222385] do_syscall_64+0x3f/0x90 [ 43.222867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.223536] RIP: 0033:0x7f1bab693d82 [ 43.223992] 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 [ 43.226081] RSP: 002b:00007ffc3bf97938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.226993] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bab693d82 [ 43.227842] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1baaacd000 [ 43.228685] RBP: 00007f1baaacd000 R08: 0000000000000009 R09: 0000000000001000 [ 43.229534] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617f260aec0 [ 43.230375] R13: 00007ffc3bf97950 R14: 00007ffc3bf97980 R15: 00007ffc3bf97ce0 [ 43.231243] [ 43.231537] [ 43.231757] Allocated by task 213: [ 43.232182] kasan_save_stack+0x22/0x50 [ 43.232690] kasan_set_track+0x25/0x30 [ 43.233186] __kasan_slab_alloc+0x59/0x70 [ 43.233711] kmem_cache_alloc+0x16b/0x370 [ 43.234224] vm_area_dup+0x20/0x160 [ 43.234681] __split_vma+0x170/0x950 [ 43.235171] split_vma+0xc6/0x110 [ 43.235612] mprotect_fixup+0x8d2/0xb30 [ 43.236115] do_mprotect_pkey+0x87e/0xd40 [ 43.236647] __x64_sys_mprotect+0x78/0xc0 [ 43.237165] do_syscall_64+0x3f/0x90 [ 43.237641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.238287] [ 43.238507] Freed by task 213: [ 43.238911] kasan_save_stack+0x22/0x50 [ 43.239420] kasan_set_track+0x25/0x30 [ 43.239910] kasan_save_free_info+0x2b/0x50 [ 43.240441] __kasan_slab_free+0x10a/0x190 [ 43.240971] kmem_cache_free+0x10d/0x4d0 [ 43.241478] rcu_core+0x8c8/0x2860 [ 43.241925] __do_softirq+0x1b7/0x7d4 [ 43.242423] [ 43.242655] Last potentially related work creation: [ 43.243337] kasan_save_stack+0x22/0x50 [ 43.243852] __kasan_record_aux_stack+0x8e/0xa0 [ 43.244431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.245082] remove_vma+0x139/0x170 [ 43.245540] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.246092] do_vmi_munmap+0x1f1/0x2b0 [ 43.246574] __vm_munmap+0x138/0x3a0 [ 43.247065] __x64_sys_munmap+0x59/0x80 [ 43.247559] do_syscall_64+0x3f/0x90 [ 43.248039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.248691] [ 43.248911] Second to last potentially related work creation: [ 43.249603] kasan_save_stack+0x22/0x50 [ 43.250109] __kasan_record_aux_stack+0x8e/0xa0 [ 43.250685] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.251341] remove_vma+0x139/0x170 [ 43.251792] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.252350] do_vmi_munmap+0x1f1/0x2b0 [ 43.252839] mmap_region+0x1f9/0x2660 [ 43.253312] do_mmap+0x854/0xf00 [ 43.253750] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.254234] ksys_mmap_pgoff+0x3af/0x500 [ 43.254735] do_syscall_64+0x3f/0x90 [ 43.255231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.255886] [ 43.256103] The buggy address belongs to the object at ffff88800ddad000 [ 43.256103] which belongs to the cache vm_area_struct of size 168 [ 43.257569] The buggy address is located 88 bytes inside of [ 43.257569] freed 168-byte region [ffff88800ddad000, ffff88800ddad0a8) [ 43.258982] [ 43.259199] The buggy address belongs to the physical page: [ 43.259863] page:00000000b5220b98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddad [ 43.260954] memcg:ffff8880095ab901 [ 43.261381] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.262022] page_type: 0xffffffff() [ 43.262474] raw: 0100000000000200 ffff88800879fc80 ffffea0000363480 dead000000000006 [ 43.263395] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095ab901 [ 43.264299] page dumped because: kasan: bad access detected [ 43.264956] [ 43.265172] Memory state around the buggy address: [ 43.265747] ffff88800ddacf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.266590] ffff88800ddacf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.267457] >ffff88800ddad000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.268300] ^ [ 43.269021] ffff88800ddad080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 43.269872] ffff88800ddad100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.270715] ================================================================== [ 43.271689] Disabling lock debugging due to kernel taint [ 45.212354] BUG: Bad rss-counter state mm:000000009cf2d3cd type:MM_FILEPAGES val:33 [ 45.213107] BUG: Bad rss-counter state mm:000000009cf2d3cd type:MM_ANONPAGES val:22 [ 45.661433] BUG: Bad rss-counter state mm:00000000e08aca83 type:MM_FILEPAGES val:33 [ 45.662492] BUG: Bad rss-counter state mm:00000000e08aca83 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11362' (ECDSA) to the list of known hosts. 2023/06/20 08:29:52 fuzzer started 2023/06/20 08:29:52 dialing manager at localhost:44161 2023/06/20 08:29:52 checking machine... 2023/06/20 08:29:52 checking revisions... [ 46.403343] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:29:52 testing simple program... [ 46.463810] cgroup: Unknown subsys name 'net' [ 46.503035] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:29:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8614cd06 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8614cd0a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000246df R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=0000000000000004 R15=ffff88806ce09a98 RIP=ffffffff81130b1f 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fca71982900 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=00007fca70dfa350 CR3=000000000d55e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=44157fc28612250200000000000ae988 XMM05=61dec4d64e61c21700000000001362f8 XMM06=4fda316b135da52b0000000000134a20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860ab102 RDX=1ffff11002ca9f5c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801654faf0 RSP=ffff88801654fa28 R8 =ffffffff860ab106 R9 =ffff88801654fad8 R10=0000000000038001 R11=0000000000009789 R12=ffff88801654faf8 R13=ffff88801654fae0 R14=0000000000000005 R15=ffff88801654fa98 RIP=ffffffff81130b54 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 00007f8265c6a900 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=00007f8266221618 CR3=0000000017e74000 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=563412feff00545000000000000080fe 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