syzkaller login: [ 30.149482] BUG: Bad rss-counter state mm:000000003851223d type:MM_FILEPAGES val:33 [ 30.150341] BUG: Bad rss-counter state mm:000000003851223d type:MM_ANONPAGES val:22 [ 30.259554] ================================================================== [ 30.260158] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.260795] Read of size 8 at addr ffff888018d1ed08 by task sshd/220 [ 30.261294] [ 30.261434] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.261996] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.262631] Call Trace: [ 30.262840] [ 30.263027] dump_stack_lvl+0x91/0xf0 [ 30.263349] print_report+0xcc/0x620 [ 30.263671] ? __virt_addr_valid+0x102/0x340 [ 30.264032] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.264435] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.264989] kasan_report+0xbe/0xf0 [ 30.265297] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.265703] vma_interval_tree_remove+0xc75/0xec0 [ 30.266135] vma_prepare+0xc54/0x11a0 [ 30.266458] __split_vma+0x5af/0x950 [ 30.266766] ? __pfx___split_vma+0x10/0x10 [ 30.267124] ? find_held_lock+0x2c/0x110 [ 30.267489] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.267878] ? lock_is_held_type+0x9f/0x120 [ 30.268246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.268661] ? mtree_range_walk+0x632/0x900 [ 30.269055] ? mas_walk+0x5c7/0x7c0 [ 30.269374] do_vmi_munmap+0x1f1/0x2b0 [ 30.269715] mmap_region+0x1f9/0x2660 [ 30.270029] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.270376] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.270847] ? __pfx_lock_acquire+0x10/0x10 [ 30.271191] ? __pfx_mmap_region+0x10/0x10 [ 30.271539] ? security_mmap_addr+0x7d/0xa0 [ 30.271900] ? get_unmapped_area+0x1f5/0x3f0 [ 30.272285] do_mmap+0x854/0xf00 [ 30.272565] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.272887] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.273234] ksys_mmap_pgoff+0x3af/0x500 [ 30.273555] do_syscall_64+0x3f/0x90 [ 30.273857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.274297] RIP: 0033:0x7f36ce167d82 [ 30.274606] 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 [ 30.275991] RSP: 002b:00007ffd5d7c2808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.276571] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36ce167d82 [ 30.277132] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36cd5a1000 [ 30.277681] RBP: 00007f36cd5a1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.278227] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c508b8eec0 [ 30.278776] R13: 00007ffd5d7c2820 R14: 00007ffd5d7c2850 R15: 00007ffd5d7c2bb0 [ 30.279366] [ 30.279567] [ 30.279707] Allocated by task 213: [ 30.279986] kasan_save_stack+0x22/0x50 [ 30.280325] kasan_set_track+0x25/0x30 [ 30.280656] __kasan_slab_alloc+0x59/0x70 [ 30.281029] kmem_cache_alloc+0x16b/0x370 [ 30.281372] vm_area_dup+0x20/0x160 [ 30.281683] __split_vma+0x170/0x950 [ 30.282008] split_vma+0xc6/0x110 [ 30.282287] mprotect_fixup+0x8d2/0xb30 [ 30.282626] do_mprotect_pkey+0x87e/0xd40 [ 30.282979] __x64_sys_mprotect+0x78/0xc0 [ 30.283325] do_syscall_64+0x3f/0x90 [ 30.283639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.284078] [ 30.284221] Freed by task 0: [ 30.284475] kasan_save_stack+0x22/0x50 [ 30.284819] kasan_set_track+0x25/0x30 [ 30.285145] kasan_save_free_info+0x2b/0x50 [ 30.285485] __kasan_slab_free+0x10a/0x190 [ 30.285824] kmem_cache_free+0x10d/0x4d0 [ 30.286148] rcu_core+0x8c8/0x2860 [ 30.286431] __do_softirq+0x1b7/0x7d4 [ 30.286738] [ 30.286876] Last potentially related work creation: [ 30.287251] kasan_save_stack+0x22/0x50 [ 30.287572] __kasan_record_aux_stack+0x8e/0xa0 [ 30.287938] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.288373] remove_vma+0x139/0x170 [ 30.288681] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.289064] do_vmi_munmap+0x1f1/0x2b0 [ 30.289385] __vm_munmap+0x138/0x3a0 [ 30.289708] __x64_sys_munmap+0x59/0x80 [ 30.290032] do_syscall_64+0x3f/0x90 [ 30.290334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.290742] [ 30.290881] The buggy address belongs to the object at ffff888018d1ecb0 [ 30.290881] which belongs to the cache vm_area_struct of size 168 [ 30.291815] The buggy address is located 88 bytes inside of [ 30.291815] freed 168-byte region [ffff888018d1ecb0, ffff888018d1ed58) [ 30.292741] [ 30.292890] The buggy address belongs to the physical page: [ 30.293329] page:00000000654d3c81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d1e [ 30.294031] memcg:ffff8880167d9801 [ 30.294309] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.294730] page_type: 0xffffffff() [ 30.295027] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.295627] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167d9801 [ 30.296227] page dumped because: kasan: bad access detected [ 30.296655] [ 30.296800] Memory state around the buggy address: [ 30.297178] ffff888018d1ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.297737] ffff888018d1ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.298296] >ffff888018d1ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.298850] ^ [ 30.299135] ffff888018d1ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.299688] ffff888018d1ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.300241] ================================================================== [ 30.300893] Disabling lock debugging due to kernel taint [ 31.950877] BUG: Bad rss-counter state mm:000000007db31cda type:MM_FILEPAGES val:33 [ 31.951732] BUG: Bad rss-counter state mm:000000007db31cda type:MM_ANONPAGES val:22 [ 32.341186] BUG: Bad rss-counter state mm:000000000d7e6372 type:MM_FILEPAGES val:33 [ 32.341838] BUG: Bad rss-counter state mm:000000000d7e6372 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55561' (ECDSA) to the list of known hosts. 2023/06/21 03:39:56 fuzzer started 2023/06/21 03:39:56 dialing manager at localhost:36067 2023/06/21 03:39:56 checking machine... 2023/06/21 03:39:56 checking revisions... [ 33.043143] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:39:56 testing simple program... [ 33.094469] cgroup: Unknown subsys name 'net' [ 33.149240] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:39:56 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=00000000331c60ed RCX=ffff88806ca30768 RDX=000000000000000d RSI=ffffffff83635bd7 RDI=000000004799b3ad RBP=ffff88800e2abc80 RSP=ffff88800cfff5f0 R8 =00000000c46c2e7d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800cfff658 R15=000000000000000d RIP=ffffffff82270500 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 00007f0d124d0900 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=00007f0d12a87618 CR3=000000000ca3a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f65659b2000 CR3=000000000eb80000 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=2036353a39333a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a39333a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000