syzkaller login: [ 34.076665] BUG: Bad rss-counter state mm:00000000b5e53332 type:MM_FILEPAGES val:33 [ 34.078205] BUG: Bad rss-counter state mm:00000000b5e53332 type:MM_ANONPAGES val:22 [ 34.239116] ================================================================== [ 34.240316] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.241564] Read of size 8 at addr ffff888015d0a968 by task sshd/220 [ 34.242653] [ 34.242940] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.244104] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.245408] Call Trace: [ 34.245831] [ 34.246229] dump_stack_lvl+0x91/0xf0 [ 34.246855] print_report+0xcc/0x620 [ 34.247477] ? __virt_addr_valid+0x102/0x340 [ 34.248198] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.248996] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.249818] kasan_report+0xbe/0xf0 [ 34.250449] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.251254] vma_interval_tree_remove+0xc75/0xec0 [ 34.252029] vma_prepare+0xc54/0x11a0 [ 34.252649] __split_vma+0x5af/0x950 [ 34.253253] ? __pfx___split_vma+0x10/0x10 [ 34.253953] ? find_held_lock+0x2c/0x110 [ 34.254629] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.255375] ? lock_is_held_type+0x9f/0x120 [ 34.256084] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.256878] ? mtree_range_walk+0x632/0x900 [ 34.257595] ? mas_walk+0x5c7/0x7c0 [ 34.258230] do_vmi_munmap+0x1f1/0x2b0 [ 34.258864] mmap_region+0x1f9/0x2660 [ 34.259496] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.260166] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.261110] ? __pfx_lock_acquire+0x10/0x10 [ 34.261800] ? __pfx_mmap_region+0x10/0x10 [ 34.262522] ? security_mmap_addr+0x7d/0xa0 [ 34.263211] ? get_unmapped_area+0x1f5/0x3f0 [ 34.263940] do_mmap+0x854/0xf00 [ 34.264510] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.265149] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.265895] ksys_mmap_pgoff+0x3af/0x500 [ 34.266566] do_syscall_64+0x3f/0x90 [ 34.267185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.268020] RIP: 0033:0x7fb6b273bd82 [ 34.268621] 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 [ 34.271409] RSP: 002b:00007fff5d6c4468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.272594] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb6b273bd82 [ 34.273712] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb6b1b75000 [ 34.274835] RBP: 00007fb6b1b75000 R08: 0000000000000009 R09: 0000000000001000 [ 34.275938] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a97c8fcec0 [ 34.277068] R13: 00007fff5d6c4480 R14: 00007fff5d6c44b0 R15: 00007fff5d6c4810 [ 34.278218] [ 34.278597] [ 34.278866] Allocated by task 212: [ 34.279417] kasan_save_stack+0x22/0x50 [ 34.280084] kasan_set_track+0x25/0x30 [ 34.280736] __kasan_slab_alloc+0x59/0x70 [ 34.281419] kmem_cache_alloc+0x16b/0x370 [ 34.282104] vm_area_dup+0x20/0x160 [ 34.282689] __split_vma+0x170/0x950 [ 34.283224] split_vma+0xc6/0x110 [ 34.283673] mprotect_fixup+0x8d2/0xb30 [ 34.284185] do_mprotect_pkey+0x87e/0xd40 [ 34.284711] __x64_sys_mprotect+0x78/0xc0 [ 34.285240] do_syscall_64+0x3f/0x90 [ 34.285721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.286385] [ 34.286604] Freed by task 212: [ 34.287001] kasan_save_stack+0x22/0x50 [ 34.287513] kasan_set_track+0x25/0x30 [ 34.288013] kasan_save_free_info+0x2b/0x50 [ 34.288549] __kasan_slab_free+0x10a/0x190 [ 34.289095] kmem_cache_free+0x10d/0x4d0 [ 34.289607] rcu_core+0x8c8/0x2860 [ 34.290063] __do_softirq+0x1b7/0x7d4 [ 34.290546] [ 34.290764] Last potentially related work creation: [ 34.291351] kasan_save_stack+0x22/0x50 [ 34.291862] __kasan_record_aux_stack+0x8e/0xa0 [ 34.292441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.293093] remove_vma+0x139/0x170 [ 34.293575] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.294171] do_vmi_munmap+0x1f1/0x2b0 [ 34.294690] __vm_munmap+0x138/0x3a0 [ 34.295181] __x64_sys_munmap+0x59/0x80 [ 34.295706] do_syscall_64+0x3f/0x90 [ 34.296215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.296891] [ 34.297119] The buggy address belongs to the object at ffff888015d0a910 [ 34.297119] which belongs to the cache vm_area_struct of size 168 [ 34.298704] The buggy address is located 88 bytes inside of [ 34.298704] freed 168-byte region [ffff888015d0a910, ffff888015d0a9b8) [ 34.300213] [ 34.300443] The buggy address belongs to the physical page: [ 34.301142] page:0000000019c369db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d0a [ 34.302321] memcg:ffff888015ddf101 [ 34.302772] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.303457] page_type: 0xffffffff() [ 34.303936] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.304912] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ddf101 [ 34.305886] page dumped because: kasan: bad access detected [ 34.306594] [ 34.306823] Memory state around the buggy address: [ 34.307440] ffff888015d0a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.308345] ffff888015d0a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.309249] >ffff888015d0a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.310165] ^ [ 34.311006] ffff888015d0a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.311923] ffff888015d0aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.312824] ================================================================== [ 34.313870] Disabling lock debugging due to kernel taint [ 36.211318] BUG: Bad rss-counter state mm:00000000529ea0b1 type:MM_FILEPAGES val:33 [ 36.212494] BUG: Bad rss-counter state mm:00000000529ea0b1 type:MM_ANONPAGES val:22 [ 36.653670] BUG: Bad rss-counter state mm:00000000348c7669 type:MM_FILEPAGES val:33 [ 36.654788] BUG: Bad rss-counter state mm:00000000348c7669 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15804' (ECDSA) to the list of known hosts. 2023/06/20 09:53:40 fuzzer started 2023/06/20 09:53:40 dialing manager at localhost:44161 2023/06/20 09:53:40 checking machine... 2023/06/20 09:53:40 checking revisions... [ 37.425146] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:53:40 testing simple program... [ 37.476538] cgroup: Unknown subsys name 'net' [ 37.527045] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:53:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8450c060 RSP=ffff888017d1ff08 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000ae600000ae6 R12=ffff888017d1ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000016 [----AP-] 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 00007ff1fd390900 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=00007ff1fd947618 CR3=0000000015e1c000 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=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 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=ffff888008c58400 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=00007ff67029d2c0 CR3=0000000013a90000 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=457afd9753204c8b854288c1190bbccb XMM02=000000000011f698eff9b2d0a8fce9cb XMM03=000000000011f7682c67c8bc2e329bc3 XMM04=295d3f4f901580af00000000000ae988 XMM05=19e9129bd510f2350000000000133920 XMM06=d976453ea1a83e3e0000000000132788 XMM07=e042d86d42eb936e0000000000123fe8 XMM08=e8aafdec24588e6a000000000011f768 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000