syzkaller login: [ 31.770169] BUG: Bad rss-counter state mm:00000000f8d1446d type:MM_FILEPAGES val:33 [ 31.772364] BUG: Bad rss-counter state mm:00000000f8d1446d type:MM_ANONPAGES val:22 [ 31.949191] ================================================================== [ 31.950278] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.951533] Read of size 8 at addr ffff88800da8b968 by task sshd/220 [ 31.952569] [ 31.952830] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.953849] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.955015] Call Trace: [ 31.955394] [ 31.955731] dump_stack_lvl+0x91/0xf0 [ 31.956317] print_report+0xcc/0x620 [ 31.956891] ? __virt_addr_valid+0x102/0x340 [ 31.957542] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.958286] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.959041] kasan_report+0xbe/0xf0 [ 31.959613] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.960377] vma_interval_tree_remove+0xc75/0xec0 [ 31.961124] vma_prepare+0xc54/0x11a0 [ 31.961712] __split_vma+0x5af/0x950 [ 31.962290] ? __pfx___split_vma+0x10/0x10 [ 31.962964] ? find_held_lock+0x2c/0x110 [ 31.963606] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.964192] ? lock_is_held_type+0x9f/0x120 [ 31.964735] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.965339] ? mtree_range_walk+0x632/0x900 [ 31.965889] ? mas_walk+0x5c7/0x7c0 [ 31.966370] do_vmi_munmap+0x1f1/0x2b0 [ 31.966876] mmap_region+0x1f9/0x2660 [ 31.967363] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.967875] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.968587] ? __pfx_lock_acquire+0x10/0x10 [ 31.969121] ? __pfx_mmap_region+0x10/0x10 [ 31.969651] ? security_mmap_addr+0x7d/0xa0 [ 31.970186] ? get_unmapped_area+0x1f5/0x3f0 [ 31.970732] do_mmap+0x854/0xf00 [ 31.971193] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.971684] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.972245] ksys_mmap_pgoff+0x3af/0x500 [ 31.972751] do_syscall_64+0x3f/0x90 [ 31.973236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.973882] RIP: 0033:0x7f6ad5343d82 [ 31.974341] 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 [ 31.976477] RSP: 002b:00007ffd68cb1788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.977390] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ad5343d82 [ 31.978231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ad477d000 [ 31.979096] RBP: 00007f6ad477d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.979946] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611cb0cbd90 [ 31.980789] R13: 00007ffd68cb17a0 R14: 00007ffd68cb17d0 R15: 00007ffd68cb1b30 [ 31.981644] [ 31.981933] [ 31.982150] Allocated by task 213: [ 31.982575] kasan_save_stack+0x22/0x50 [ 31.983106] kasan_set_track+0x25/0x30 [ 31.983599] __kasan_slab_alloc+0x59/0x70 [ 31.984162] kmem_cache_alloc+0x16b/0x370 [ 31.984719] vm_area_dup+0x20/0x160 [ 31.985208] __split_vma+0x170/0x950 [ 31.985707] split_vma+0xc6/0x110 [ 31.986184] mprotect_fixup+0x8d2/0xb30 [ 31.986724] do_mprotect_pkey+0x87e/0xd40 [ 31.987286] __x64_sys_mprotect+0x78/0xc0 [ 31.987839] do_syscall_64+0x3f/0x90 [ 31.988343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.989036] [ 31.989260] Freed by task 213: [ 31.989682] kasan_save_stack+0x22/0x50 [ 31.990218] kasan_set_track+0x25/0x30 [ 31.990742] kasan_save_free_info+0x2b/0x50 [ 31.991316] __kasan_slab_free+0x10a/0x190 [ 31.991886] kmem_cache_free+0x10d/0x4d0 [ 31.992418] rcu_core+0x8c8/0x2860 [ 31.992879] __do_softirq+0x1b7/0x7d4 [ 31.993368] [ 31.993590] Last potentially related work creation: [ 31.994204] kasan_save_stack+0x22/0x50 [ 31.994741] __kasan_record_aux_stack+0x8e/0xa0 [ 31.995369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.996035] remove_vma+0x139/0x170 [ 31.996508] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.997094] do_vmi_munmap+0x1f1/0x2b0 [ 31.997605] __vm_munmap+0x138/0x3a0 [ 31.998095] __x64_sys_munmap+0x59/0x80 [ 31.998613] do_syscall_64+0x3f/0x90 [ 31.999116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.999796] [ 32.000023] The buggy address belongs to the object at ffff88800da8b910 [ 32.000023] which belongs to the cache vm_area_struct of size 168 [ 32.001561] The buggy address is located 88 bytes inside of [ 32.001561] freed 168-byte region [ffff88800da8b910, ffff88800da8b9b8) [ 32.003045] [ 32.003267] The buggy address belongs to the physical page: [ 32.003958] page:00000000345cde36 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda8b [ 32.005086] memcg:ffff888018c3cf01 [ 32.005536] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.006219] page_type: 0xffffffff() [ 32.006684] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.007663] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c3cf01 [ 32.008600] page dumped because: kasan: bad access detected [ 32.009291] [ 32.009519] Memory state around the buggy address: [ 32.010139] ffff88800da8b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.011056] ffff88800da8b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.011961] >ffff88800da8b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.012852] ^ [ 32.013665] ffff88800da8b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.014562] ffff88800da8ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.015466] ================================================================== [ 32.016678] Disabling lock debugging due to kernel taint [ 34.131481] BUG: Bad rss-counter state mm:000000004fc4717b type:MM_FILEPAGES val:33 [ 34.132489] BUG: Bad rss-counter state mm:000000004fc4717b type:MM_ANONPAGES val:22 [ 34.589338] BUG: Bad rss-counter state mm:00000000c33f1110 type:MM_FILEPAGES val:33 [ 34.590704] BUG: Bad rss-counter state mm:00000000c33f1110 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30281' (ECDSA) to the list of known hosts. 2023/06/19 17:11:25 fuzzer started 2023/06/19 17:11:25 dialing manager at localhost:44161 2023/06/19 17:11:25 checking machine... 2023/06/19 17:11:25 checking revisions... [ 35.288617] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:11:25 testing simple program... [ 35.335320] cgroup: Unknown subsys name 'net' [ 35.376977] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:11:24 Registers: info registers vcpu 0 RAX=ffff88806ce3de00 RBX=0000000000092c40 RCX=ffffffff812d869a RDX=dffffc0000000000 RSI=0000000000092c40 RDI=00000000024771c0 RBP=ffff88801450f838 RSP=ffff88801450f7f0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000000 R15=ffffffff818470dc RIP=ffffffff81807e24 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f50c7979900 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=00007f50c6df1a00 CR3=000000000d600000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e51d8a5252c3297d00000000000ae988 XMM05=3a314c9847a0970300000000001354a0 XMM06=4fda316b135da52b0000000000134540 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff888016717800 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff88800f783180 RIP=ffffffff8180ef24 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 00007f729edae900 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=00007f729f365618 CR3=0000000015eba000 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