syzkaller login: [ 34.123650] BUG: Bad rss-counter state mm:000000007195597e type:MM_FILEPAGES val:33 [ 34.124413] BUG: Bad rss-counter state mm:000000007195597e type:MM_ANONPAGES val:22 [ 34.257246] ================================================================== [ 34.257879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.258528] Read of size 8 at addr ffff888019fe93f8 by task sshd/220 [ 34.259065] [ 34.259219] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.259834] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.260523] Call Trace: [ 34.260735] [ 34.260929] dump_stack_lvl+0x91/0xf0 [ 34.261256] print_report+0xcc/0x620 [ 34.261587] ? __virt_addr_valid+0x102/0x340 [ 34.262183] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.262617] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.263046] kasan_report+0xbe/0xf0 [ 34.263357] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.263769] vma_interval_tree_remove+0xc75/0xec0 [ 34.264195] vma_prepare+0xc54/0x11a0 [ 34.264526] __split_vma+0x5af/0x950 [ 34.264863] ? __pfx___split_vma+0x10/0x10 [ 34.265228] ? find_held_lock+0x2c/0x110 [ 34.265595] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.265977] ? lock_is_held_type+0x9f/0x120 [ 34.266338] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.266748] ? mtree_range_walk+0x632/0x900 [ 34.267127] ? mas_walk+0x5c7/0x7c0 [ 34.267447] do_vmi_munmap+0x1f1/0x2b0 [ 34.267788] mmap_region+0x1f9/0x2660 [ 34.268192] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.268543] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.269050] ? __pfx_lock_acquire+0x10/0x10 [ 34.269415] ? __pfx_mmap_region+0x10/0x10 [ 34.269774] ? security_mmap_addr+0x7d/0xa0 [ 34.270160] ? get_unmapped_area+0x1f5/0x3f0 [ 34.270548] do_mmap+0x854/0xf00 [ 34.270829] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.271168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.271560] ksys_mmap_pgoff+0x3af/0x500 [ 34.271920] do_syscall_64+0x3f/0x90 [ 34.272269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.272744] RIP: 0033:0x7f60a97d2d82 [ 34.273102] 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 [ 34.274522] RSP: 002b:00007ffd5561b758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.275151] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f60a97d2d82 [ 34.275766] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f60a8c0c000 [ 34.276382] RBP: 00007f60a8c0c000 R08: 0000000000000009 R09: 0000000000001000 [ 34.276966] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e8f50bec0 [ 34.277540] R13: 00007ffd5561b770 R14: 00007ffd5561b7a0 R15: 00007ffd5561bb00 [ 34.278133] [ 34.278335] [ 34.278488] Allocated by task 213: [ 34.278790] kasan_save_stack+0x22/0x50 [ 34.279150] kasan_set_track+0x25/0x30 [ 34.279488] __kasan_slab_alloc+0x59/0x70 [ 34.279862] kmem_cache_alloc+0x16b/0x370 [ 34.280275] vm_area_dup+0x20/0x160 [ 34.280591] __split_vma+0x170/0x950 [ 34.280925] split_vma+0xc6/0x110 [ 34.281232] mprotect_fixup+0x8d2/0xb30 [ 34.281590] do_mprotect_pkey+0x87e/0xd40 [ 34.281958] __x64_sys_mprotect+0x78/0xc0 [ 34.282318] do_syscall_64+0x3f/0x90 [ 34.282645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.283098] [ 34.283255] Freed by task 203: [ 34.283525] kasan_save_stack+0x22/0x50 [ 34.283884] kasan_set_track+0x25/0x30 [ 34.284261] kasan_save_free_info+0x2b/0x50 [ 34.284638] __kasan_slab_free+0x10a/0x190 [ 34.285005] kmem_cache_free+0x10d/0x4d0 [ 34.285361] rcu_core+0x8c8/0x2860 [ 34.285678] __do_softirq+0x1b7/0x7d4 [ 34.286017] [ 34.286174] Last potentially related work creation: [ 34.286582] kasan_save_stack+0x22/0x50 [ 34.286939] __kasan_record_aux_stack+0x8e/0xa0 [ 34.287338] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.287786] remove_vma+0x139/0x170 [ 34.288126] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.288515] do_vmi_munmap+0x1f1/0x2b0 [ 34.288853] __vm_munmap+0x138/0x3a0 [ 34.289174] __x64_sys_munmap+0x59/0x80 [ 34.289527] do_syscall_64+0x3f/0x90 [ 34.289861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.290303] [ 34.290452] The buggy address belongs to the object at ffff888019fe93a0 [ 34.290452] which belongs to the cache vm_area_struct of size 168 [ 34.291483] The buggy address is located 88 bytes inside of [ 34.291483] freed 168-byte region [ffff888019fe93a0, ffff888019fe9448) [ 34.292484] [ 34.292639] The buggy address belongs to the physical page: [ 34.293111] page:000000009c86cd67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fe9 [ 34.293880] memcg:ffff8880198e2401 [ 34.294183] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.294665] page_type: 0xffffffff() [ 34.294990] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.295615] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198e2401 [ 34.296294] page dumped because: kasan: bad access detected [ 34.296784] [ 34.296942] Memory state around the buggy address: [ 34.297348] ffff888019fe9280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.297968] ffff888019fe9300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.298561] >ffff888019fe9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.299206] ^ [ 34.299807] ffff888019fe9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.300439] ffff888019fe9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.301020] ================================================================== [ 34.301750] Disabling lock debugging due to kernel taint [ 35.939300] BUG: Bad rss-counter state mm:000000000aa274d2 type:MM_FILEPAGES val:33 [ 35.940061] BUG: Bad rss-counter state mm:000000000aa274d2 type:MM_ANONPAGES val:22 [ 36.302967] BUG: Bad rss-counter state mm:00000000c570fb39 type:MM_FILEPAGES val:33 [ 36.303705] BUG: Bad rss-counter state mm:00000000c570fb39 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25934' (ECDSA) to the list of known hosts. 2023/06/20 09:20:11 fuzzer started 2023/06/20 09:20:11 dialing manager at localhost:44161 2023/06/20 09:20:11 checking machine... 2023/06/20 09:20:11 checking revisions... [ 36.801474] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:20:11 testing simple program... [ 36.838277] cgroup: Unknown subsys name 'net' [ 36.893135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:20:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000010 RCX=ffffffff81f7976b RDX=ffff88800f16b680 RSI=0000000000000010 RDI=0000000000000002 RBP=ffff88800ec59000 RSP=ffff888018c57cf8 R8 =0000000000000003 R9 =000000000000003c R10=0000000000000025 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000010 R14=1ffff1100318afa9 R15=0000000000000001 RIP=ffffffff814c0358 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5eb760c900 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=00007f5eb7bc40b0 CR3=000000000f014000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f5aa7324ed0 CR3=0000000013bb6000 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=904e8869adbe50bce143253497f9150f XMM02=2c67c8bc2e329bc3000000000011cf60 XMM03=fb795ef6d657705600000000001244d8 XMM04=3de19ccc5a8bafaf00000000000ae988 XMM05=19e9129bd510f2350000000000134088 XMM06=feda7eb2f68b8aa50000000000132ef0 XMM07=e042d86d42eb936e0000000000124758 XMM08=b75cc08e01971e1d000000000011cfc0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000