syzkaller login: [ 30.635255] BUG: Bad rss-counter state mm:0000000016b94b22 type:MM_FILEPAGES val:33 [ 30.636748] BUG: Bad rss-counter state mm:0000000016b94b22 type:MM_ANONPAGES val:22 [ 30.779378] ================================================================== [ 30.780289] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.781222] Read of size 8 at addr ffff88800b3fb6b0 by task sshd/221 [ 30.782009] [ 30.782228] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.783205] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.784168] Call Trace: [ 30.784493] [ 30.784810] dump_stack_lvl+0x91/0xf0 [ 30.785321] print_report+0xcc/0x620 [ 30.785840] ? __virt_addr_valid+0x102/0x340 [ 30.786405] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.787018] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.787647] kasan_report+0xbe/0xf0 [ 30.788129] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.788772] vma_interval_tree_remove+0xc75/0xec0 [ 30.789399] vma_prepare+0xc54/0x11a0 [ 30.789908] __split_vma+0x5af/0x950 [ 30.790401] ? __pfx___split_vma+0x10/0x10 [ 30.790939] ? find_held_lock+0x2c/0x110 [ 30.791476] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.792066] ? lock_is_held_type+0x9f/0x120 [ 30.792628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.793243] ? mtree_range_walk+0x632/0x900 [ 30.793819] ? mas_walk+0x5c7/0x7c0 [ 30.794299] do_vmi_munmap+0x1f1/0x2b0 [ 30.794802] mmap_region+0x1f9/0x2660 [ 30.795291] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.795814] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.796530] ? __pfx_lock_acquire+0x10/0x10 [ 30.797084] ? __pfx_mmap_region+0x10/0x10 [ 30.797659] ? security_mmap_addr+0x7d/0xa0 [ 30.798189] ? get_unmapped_area+0x1f5/0x3f0 [ 30.798741] do_mmap+0x854/0xf00 [ 30.799187] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.799678] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.800245] ksys_mmap_pgoff+0x3af/0x500 [ 30.800766] do_syscall_64+0x3f/0x90 [ 30.801259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801926] RIP: 0033:0x7f1bdf5f5d82 [ 30.802382] 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 [ 30.804539] RSP: 002b:00007ffda9e0c588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.805471] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bdf5f5d82 [ 30.806356] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bdea2f000 [ 30.807220] RBP: 00007f1bdea2f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.808070] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563fbb4ceb20 [ 30.808919] R13: 00007ffda9e0c5a0 R14: 00007ffda9e0c5d0 R15: 00007ffda9e0c930 [ 30.809804] [ 30.810104] [ 30.810324] Allocated by task 214: [ 30.810752] kasan_save_stack+0x22/0x50 [ 30.811267] kasan_set_track+0x25/0x30 [ 30.811773] __kasan_slab_alloc+0x59/0x70 [ 30.812303] kmem_cache_alloc+0x16b/0x370 [ 30.812828] vm_area_dup+0x20/0x160 [ 30.813280] __split_vma+0x170/0x950 [ 30.813773] split_vma+0xc6/0x110 [ 30.814213] mprotect_fixup+0x8d2/0xb30 [ 30.814723] do_mprotect_pkey+0x87e/0xd40 [ 30.815251] __x64_sys_mprotect+0x78/0xc0 [ 30.815792] do_syscall_64+0x3f/0x90 [ 30.816266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.816914] [ 30.817133] Freed by task 214: [ 30.817545] kasan_save_stack+0x22/0x50 [ 30.818048] kasan_set_track+0x25/0x30 [ 30.818549] kasan_save_free_info+0x2b/0x50 [ 30.819094] __kasan_slab_free+0x10a/0x190 [ 30.819646] kmem_cache_free+0x10d/0x4d0 [ 30.820161] rcu_core+0x8c8/0x2860 [ 30.820619] __do_softirq+0x1b7/0x7d4 [ 30.821098] [ 30.821317] Last potentially related work creation: [ 30.821920] kasan_save_stack+0x22/0x50 [ 30.822429] __kasan_record_aux_stack+0x8e/0xa0 [ 30.823012] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.823658] remove_vma+0x139/0x170 [ 30.824120] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.824677] do_vmi_munmap+0x1f1/0x2b0 [ 30.825161] __vm_munmap+0x138/0x3a0 [ 30.825652] __x64_sys_munmap+0x59/0x80 [ 30.826157] do_syscall_64+0x3f/0x90 [ 30.826629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827275] [ 30.827490] The buggy address belongs to the object at ffff88800b3fb658 [ 30.827490] which belongs to the cache vm_area_struct of size 168 [ 30.828972] The buggy address is located 88 bytes inside of [ 30.828972] freed 168-byte region [ffff88800b3fb658, ffff88800b3fb700) [ 30.830398] [ 30.830616] The buggy address belongs to the physical page: [ 30.831286] page:0000000063d2a06e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb3fb [ 30.832383] memcg:ffff88800f5f9f01 [ 30.832810] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.833460] page_type: 0xffffffff() [ 30.833940] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.834866] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5f9f01 [ 30.835784] page dumped because: kasan: bad access detected [ 30.836453] [ 30.836673] Memory state around the buggy address: [ 30.837263] ffff88800b3fb580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.838138] ffff88800b3fb600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.839002] >ffff88800b3fb680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.839860] ^ [ 30.840452] ffff88800b3fb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.841312] ffff88800b3fb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.842190] ================================================================== [ 30.843184] Disabling lock debugging due to kernel taint [ 32.664051] BUG: Bad rss-counter state mm:000000008594cfda type:MM_FILEPAGES val:33 [ 32.664697] BUG: Bad rss-counter state mm:000000008594cfda type:MM_ANONPAGES val:22 [ 33.176614] BUG: Bad rss-counter state mm:0000000063a82463 type:MM_FILEPAGES val:33 [ 33.177821] BUG: Bad rss-counter state mm:0000000063a82463 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1913' (ECDSA) to the list of known hosts. 2023/06/20 20:21:36 fuzzer started 2023/06/20 20:21:36 dialing manager at localhost:36067 2023/06/20 20:21:36 checking machine... 2023/06/20 20:21:36 checking revisions... [ 33.795463] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:21:37 testing simple program... [ 33.846586] cgroup: Unknown subsys name 'net' [ 33.884087] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:21:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fe0f9f0cec0 CR3=0000000016af6000 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=2036333a31323a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a31323a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100136df41 RBX=ffffffff813ad470 RCX=ffff888009b6fa60 RDX=ffff888009b70000 RSI=ffff888009b6fa58 RDI=ffff888009b6f9d0 RBP=ffff888009b6fa58 RSP=ffff888009b6f9a0 R8 =0000000000000001 R9 =ffff888009b6fa00 R10=0000000000038001 R11=0000000000003c0d R12=ffff888009b6fa88 R13=ffffed100136df39 R14=ffff888009b6fa08 R15=ffff888009b6f9c0 RIP=ffffffff81132d3a 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f70ec161900 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=00007f70ec718618 CR3=000000000e068000 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