syzkaller login: [ 30.217103] BUG: Bad rss-counter state mm:00000000a6f14468 type:MM_FILEPAGES val:33 [ 30.218374] BUG: Bad rss-counter state mm:00000000a6f14468 type:MM_ANONPAGES val:22 [ 30.256403] ================================================================== [ 30.257339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.258292] Read of size 8 at addr ffff88800e9bcdf0 by task sshd/221 [ 30.259340] [ 30.259565] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.260457] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.261463] Call Trace: [ 30.261786] [ 30.262077] dump_stack_lvl+0x91/0xf0 [ 30.262580] print_report+0xcc/0x620 [ 30.263065] ? __virt_addr_valid+0x102/0x340 [ 30.263624] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.264245] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.264884] kasan_report+0xbe/0xf0 [ 30.265362] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.265986] vma_interval_tree_remove+0xc75/0xec0 [ 30.266598] vma_prepare+0xc54/0x11a0 [ 30.267090] __split_vma+0x5af/0x950 [ 30.267575] ? __pfx___split_vma+0x10/0x10 [ 30.268113] ? find_held_lock+0x2c/0x110 [ 30.268659] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.269230] ? lock_is_held_type+0x9f/0x120 [ 30.269785] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.270401] ? mtree_range_walk+0x632/0x900 [ 30.270967] ? mas_walk+0x5c7/0x7c0 [ 30.271459] do_vmi_munmap+0x1f1/0x2b0 [ 30.271953] mmap_region+0x1f9/0x2660 [ 30.272453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.272973] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.273687] ? __pfx_lock_acquire+0x10/0x10 [ 30.274226] ? __pfx_mmap_region+0x10/0x10 [ 30.274768] ? security_mmap_addr+0x7d/0xa0 [ 30.275306] ? get_unmapped_area+0x1f5/0x3f0 [ 30.275860] do_mmap+0x854/0xf00 [ 30.276310] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.276825] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.277397] ksys_mmap_pgoff+0x3af/0x500 [ 30.277914] do_syscall_64+0x3f/0x90 [ 30.278404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.279058] RIP: 0033:0x7efef2862d82 [ 30.279521] 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 [ 30.281671] RSP: 002b:00007ffc75db2398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.282598] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efef2862d82 [ 30.283461] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efef1c9c000 [ 30.284315] RBP: 00007efef1c9c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.285182] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559751891ec0 [ 30.286049] R13: 00007ffc75db23b0 R14: 00007ffc75db23e0 R15: 00007ffc75db2740 [ 30.286921] [ 30.287221] [ 30.287442] Allocated by task 214: [ 30.287874] kasan_save_stack+0x22/0x50 [ 30.288389] kasan_set_track+0x25/0x30 [ 30.288900] __kasan_slab_alloc+0x59/0x70 [ 30.289441] kmem_cache_alloc+0x16b/0x370 [ 30.289964] vm_area_dup+0x20/0x160 [ 30.290428] __split_vma+0x170/0x950 [ 30.290894] split_vma+0xc6/0x110 [ 30.291337] mprotect_fixup+0x8d2/0xb30 [ 30.291845] do_mprotect_pkey+0x87e/0xd40 [ 30.292385] __x64_sys_mprotect+0x78/0xc0 [ 30.292933] do_syscall_64+0x3f/0x90 [ 30.293420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.294082] [ 30.294304] Freed by task 214: [ 30.294698] kasan_save_stack+0x22/0x50 [ 30.295214] kasan_set_track+0x25/0x30 [ 30.295713] kasan_save_free_info+0x2b/0x50 [ 30.296251] __kasan_slab_free+0x10a/0x190 [ 30.296795] kmem_cache_free+0x10d/0x4d0 [ 30.297313] rcu_core+0x8c8/0x2860 [ 30.297764] __do_softirq+0x1b7/0x7d4 [ 30.298244] [ 30.298464] Last potentially related work creation: [ 30.299060] kasan_save_stack+0x22/0x50 [ 30.299567] __kasan_record_aux_stack+0x8e/0xa0 [ 30.300151] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.300812] remove_vma+0x139/0x170 [ 30.301273] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.301839] do_vmi_munmap+0x1f1/0x2b0 [ 30.302334] __vm_munmap+0x138/0x3a0 [ 30.302802] __x64_sys_munmap+0x59/0x80 [ 30.303299] do_syscall_64+0x3f/0x90 [ 30.303781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.304450] [ 30.304670] Second to last potentially related work creation: [ 30.305364] kasan_save_stack+0x22/0x50 [ 30.305875] __kasan_record_aux_stack+0x8e/0xa0 [ 30.306469] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.307121] remove_vma+0x139/0x170 [ 30.307580] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.308144] do_vmi_munmap+0x1f1/0x2b0 [ 30.308652] mmap_region+0x1f9/0x2660 [ 30.309138] do_mmap+0x854/0xf00 [ 30.309577] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.310070] ksys_mmap_pgoff+0x3af/0x500 [ 30.310579] do_syscall_64+0x3f/0x90 [ 30.311060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.311707] [ 30.311929] The buggy address belongs to the object at ffff88800e9bcd98 [ 30.311929] which belongs to the cache vm_area_struct of size 168 [ 30.313415] The buggy address is located 88 bytes inside of [ 30.313415] freed 168-byte region [ffff88800e9bcd98, ffff88800e9bce40) [ 30.314834] [ 30.315052] The buggy address belongs to the physical page: [ 30.315726] page:000000006d5eab2f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9bc [ 30.316834] memcg:ffff88800e8f6f01 [ 30.317271] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.317927] page_type: 0xffffffff() [ 30.318387] raw: 0100000000000200 ffff8880087a0c80 ffffea000067bf80 dead000000000004 [ 30.319315] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8f6f01 [ 30.320227] page dumped because: kasan: bad access detected [ 30.320909] [ 30.321127] Memory state around the buggy address: [ 30.321716] ffff88800e9bcc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.322587] ffff88800e9bcd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.323456] >ffff88800e9bcd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.324311] ^ [ 30.325199] ffff88800e9bce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.326058] ffff88800e9bce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.326947] ================================================================== [ 30.328143] Disabling lock debugging due to kernel taint [ 32.384634] BUG: Bad rss-counter state mm:00000000bfb44319 type:MM_FILEPAGES val:33 [ 32.385651] BUG: Bad rss-counter state mm:00000000bfb44319 type:MM_ANONPAGES val:22 [ 32.863127] BUG: Bad rss-counter state mm:0000000027457c73 type:MM_FILEPAGES val:33 [ 32.865060] BUG: Bad rss-counter state mm:0000000027457c73 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55871' (ECDSA) to the list of known hosts. 2023/06/20 15:24:48 fuzzer started 2023/06/20 15:24:48 dialing manager at localhost:36067 2023/06/20 15:24:48 checking machine... 2023/06/20 15:24:48 checking revisions... [ 33.615278] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:24:49 testing simple program... [ 33.668963] cgroup: Unknown subsys name 'net' [ 33.704888] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:24:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff864b2f3e RDX=1ffff1100d9c1356 RSI=1ffff1100d9c1355 RDI=1ffff1100d9c1355 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff864b2f42 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffffffff85407d68 R15=ffff88806ce09a50 RIP=ffffffff811310d4 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 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=00007fff80db8ff8 CR3=0000000005482000 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=00007fa765a5a5100000561a5af17790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000024 RCX=0000000000000000 RDX=ffff888010219b40 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff8880199d0c98 RSP=ffff88801656fac8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000008000 R14=ffffffff856f0da0 R15=ffff88801656fc48 RIP=ffffffff814c0400 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 00007f14d17d2900 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=00007f14d1d87650 CR3=0000000018cca000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000