syzkaller login: [ 30.116755] BUG: Bad rss-counter state mm:0000000022df5f40 type:MM_FILEPAGES val:33 [ 30.118597] BUG: Bad rss-counter state mm:0000000022df5f40 type:MM_ANONPAGES val:22 [ 30.294806] ================================================================== [ 30.295890] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.297027] Read of size 8 at addr ffff8880146b4b38 by task sshd/221 [ 30.298068] [ 30.298323] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.299327] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.300501] Call Trace: [ 30.300881] [ 30.301216] dump_stack_lvl+0x91/0xf0 [ 30.301806] print_report+0xcc/0x620 [ 30.302390] ? __virt_addr_valid+0x102/0x340 [ 30.303057] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.303802] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.304516] kasan_report+0xbe/0xf0 [ 30.305125] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.305866] vma_interval_tree_remove+0xc75/0xec0 [ 30.306627] vma_prepare+0xc54/0x11a0 [ 30.307192] __split_vma+0x5af/0x950 [ 30.307761] ? __pfx___split_vma+0x10/0x10 [ 30.308328] ? find_held_lock+0x2c/0x110 [ 30.308891] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.309509] ? lock_is_held_type+0x9f/0x120 [ 30.310060] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.310662] ? mtree_range_walk+0x632/0x900 [ 30.311207] ? mas_walk+0x5c7/0x7c0 [ 30.311681] do_vmi_munmap+0x1f1/0x2b0 [ 30.312170] mmap_region+0x1f9/0x2660 [ 30.312648] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.313169] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.313888] ? __pfx_lock_acquire+0x10/0x10 [ 30.314421] ? __pfx_mmap_region+0x10/0x10 [ 30.314950] ? security_mmap_addr+0x7d/0xa0 [ 30.315476] ? get_unmapped_area+0x1f5/0x3f0 [ 30.316028] do_mmap+0x854/0xf00 [ 30.316464] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.316970] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.317555] ksys_mmap_pgoff+0x3af/0x500 [ 30.318100] do_syscall_64+0x3f/0x90 [ 30.318596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.319243] RIP: 0033:0x7fb735d54d82 [ 30.319700] 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 [ 30.321854] RSP: 002b:00007ffcc77253d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.322859] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb735d54d82 [ 30.323705] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb73518e000 [ 30.324551] RBP: 00007fb73518e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.325401] R10: 0000000000000812 R11: 0000000000000206 R12: 000055786beceb20 [ 30.326277] R13: 00007ffcc77253f0 R14: 00007ffcc7725420 R15: 00007ffcc7725780 [ 30.327123] [ 30.327416] [ 30.327629] Allocated by task 214: [ 30.328051] kasan_save_stack+0x22/0x50 [ 30.328557] kasan_set_track+0x25/0x30 [ 30.329052] __kasan_slab_alloc+0x59/0x70 [ 30.329580] kmem_cache_alloc+0x16b/0x370 [ 30.330119] vm_area_dup+0x20/0x160 [ 30.330575] __split_vma+0x170/0x950 [ 30.331038] split_vma+0xc6/0x110 [ 30.331489] mprotect_fixup+0x8d2/0xb30 [ 30.331995] do_mprotect_pkey+0x87e/0xd40 [ 30.332571] __x64_sys_mprotect+0x78/0xc0 [ 30.333170] do_syscall_64+0x3f/0x90 [ 30.333648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.334314] [ 30.334553] Freed by task 19: [ 30.335019] kasan_save_stack+0x22/0x50 [ 30.335641] kasan_set_track+0x25/0x30 [ 30.336242] kasan_save_free_info+0x2b/0x50 [ 30.336900] __kasan_slab_free+0x10a/0x190 [ 30.337551] kmem_cache_free+0x10d/0x4d0 [ 30.338185] rcu_core+0x8c8/0x2860 [ 30.338730] __do_softirq+0x1b7/0x7d4 [ 30.339309] [ 30.339566] Last potentially related work creation: [ 30.340290] kasan_save_stack+0x22/0x50 [ 30.340894] __kasan_record_aux_stack+0x8e/0xa0 [ 30.341595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.342391] remove_vma+0x139/0x170 [ 30.342911] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.343582] do_vmi_munmap+0x1f1/0x2b0 [ 30.344173] __vm_munmap+0x138/0x3a0 [ 30.344639] __x64_sys_munmap+0x59/0x80 [ 30.345135] do_syscall_64+0x3f/0x90 [ 30.345655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.346449] [ 30.346665] The buggy address belongs to the object at ffff8880146b4ae0 [ 30.346665] which belongs to the cache vm_area_struct of size 168 [ 30.348135] The buggy address is located 88 bytes inside of [ 30.348135] freed 168-byte region [ffff8880146b4ae0, ffff8880146b4b88) [ 30.349528] [ 30.349748] The buggy address belongs to the physical page: [ 30.350416] page:00000000b92846a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146b4 [ 30.351521] memcg:ffff888014691b01 [ 30.351964] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.352722] page_type: 0xffffffff() [ 30.353169] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.354105] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014691b01 [ 30.354999] page dumped because: kasan: bad access detected [ 30.355653] [ 30.355871] Memory state around the buggy address: [ 30.356455] ffff8880146b4a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.357304] ffff8880146b4a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.358183] >ffff8880146b4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.359036] ^ [ 30.359645] ffff8880146b4b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.360501] ffff8880146b4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.361373] ================================================================== [ 30.362367] Disabling lock debugging due to kernel taint [ 33.003697] BUG: Bad rss-counter state mm:000000009737e6c8 type:MM_FILEPAGES val:33 [ 33.004946] BUG: Bad rss-counter state mm:000000009737e6c8 type:MM_ANONPAGES val:22 [ 33.360747] BUG: Bad rss-counter state mm:0000000022afcc5b type:MM_FILEPAGES val:33 [ 33.362246] BUG: Bad rss-counter state mm:0000000022afcc5b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33614' (ECDSA) to the list of known hosts. 2023/06/21 07:15:29 fuzzer started 2023/06/21 07:15:29 dialing manager at localhost:36067 2023/06/21 07:15:29 checking machine... 2023/06/21 07:15:29 checking revisions... [ 34.037260] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:15:29 testing simple program... [ 34.077282] cgroup: Unknown subsys name 'net' [ 34.113220] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:15:29 Registers: info registers vcpu 0 RAX=ffffed1002cfce8a RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800ec6d1c0 RSI=ffffffff83ab1b1f RDI=ffffffff8560b640 RBP=1ffff11002cfce8a RSP=ffff8880167e7440 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000a0500000a05 R12=ffffffff8560b640 R13=ffffffff83ab1b1f R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff812d86a9 RFL=00000282 [--S----] 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 00007f424522f900 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=00007f42457e6618 CR3=000000001c68a000 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=0000000000000000 RBX=0000000000000002 RCX=ffffffff860d2fdc RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff860d2fe0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09f80 R15=ffff88806cf09a98 RIP=ffffffff81131153 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 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=00007f7df67f6000 CR3=000000000da0a000 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=f1e0787c7f5123a3ca4d75ec19fc0faa XMM02=2c67c8bc2e329bc3000000000011bd38 XMM03=fb795ef6d65770560000000000122b18 XMM04=4995ddb72c2a227600000000000ae988 XMM05=e556d555a0b7a92c0000000000132bf0 XMM06=c291bd5c70af25b90000000000132878 XMM07=e042d86d42eb936e0000000000122d98 XMM08=3927fb717130c412000000000011bd98 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000