syzkaller login: [ 30.109931] BUG: Bad rss-counter state mm:000000007d41ce6f type:MM_FILEPAGES val:33 [ 30.111162] BUG: Bad rss-counter state mm:000000007d41ce6f type:MM_ANONPAGES val:22 [ 30.261645] ================================================================== [ 30.262730] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.263761] Read of size 8 at addr ffff8880167dc228 by task sshd/221 [ 30.264552] [ 30.264760] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.265572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.266531] Call Trace: [ 30.266841] [ 30.267116] dump_stack_lvl+0x91/0xf0 [ 30.267610] print_report+0xcc/0x620 [ 30.268089] ? __virt_addr_valid+0x102/0x340 [ 30.268643] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.269252] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.269862] kasan_report+0xbe/0xf0 [ 30.270345] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.270959] vma_interval_tree_remove+0xc75/0xec0 [ 30.271547] vma_prepare+0xc54/0x11a0 [ 30.272021] __split_vma+0x5af/0x950 [ 30.272488] ? __pfx___split_vma+0x10/0x10 [ 30.273007] ? find_held_lock+0x2c/0x110 [ 30.273530] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.274085] ? lock_is_held_type+0x9f/0x120 [ 30.274619] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.275254] ? mtree_range_walk+0x632/0x900 [ 30.275801] ? mas_walk+0x5c7/0x7c0 [ 30.276265] do_vmi_munmap+0x1f1/0x2b0 [ 30.276741] mmap_region+0x1f9/0x2660 [ 30.277208] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.277707] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.278411] ? __pfx_lock_acquire+0x10/0x10 [ 30.278944] ? __pfx_mmap_region+0x10/0x10 [ 30.279480] ? security_mmap_addr+0x7d/0xa0 [ 30.280003] ? get_unmapped_area+0x1f5/0x3f0 [ 30.280540] do_mmap+0x854/0xf00 [ 30.280971] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.281466] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.282020] ksys_mmap_pgoff+0x3af/0x500 [ 30.282522] do_syscall_64+0x3f/0x90 [ 30.283004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.283646] RIP: 0033:0x7f80522a9d82 [ 30.284102] 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 [ 30.286200] RSP: 002b:00007ffc62da0248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.287113] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80522a9d82 [ 30.287952] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f80516e3000 [ 30.288801] RBP: 00007f80516e3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.289641] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c64fd6df60 [ 30.290477] R13: 00007ffc62da0260 R14: 00007ffc62da0290 R15: 00007ffc62da05f0 [ 30.291322] [ 30.291604] [ 30.291818] Allocated by task 214: [ 30.292246] kasan_save_stack+0x22/0x50 [ 30.292743] kasan_set_track+0x25/0x30 [ 30.293224] __kasan_slab_alloc+0x59/0x70 [ 30.293751] kmem_cache_alloc+0x16b/0x370 [ 30.294269] vm_area_dup+0x20/0x160 [ 30.294718] __split_vma+0x170/0x950 [ 30.295188] split_vma+0xc6/0x110 [ 30.295622] mprotect_fixup+0x8d2/0xb30 [ 30.296109] do_mprotect_pkey+0x87e/0xd40 [ 30.296601] __x64_sys_mprotect+0x78/0xc0 [ 30.297093] do_syscall_64+0x3f/0x90 [ 30.297574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.298216] [ 30.298433] Freed by task 214: [ 30.298821] kasan_save_stack+0x22/0x50 [ 30.299345] kasan_set_track+0x25/0x30 [ 30.299837] kasan_save_free_info+0x2b/0x50 [ 30.300374] __kasan_slab_free+0x10a/0x190 [ 30.300894] kmem_cache_free+0x10d/0x4d0 [ 30.301378] rcu_core+0x8c8/0x2860 [ 30.301804] __do_softirq+0x1b7/0x7d4 [ 30.302258] [ 30.302466] Last potentially related work creation: [ 30.303028] kasan_save_stack+0x22/0x50 [ 30.303504] __kasan_record_aux_stack+0x8e/0xa0 [ 30.304044] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.304719] remove_vma+0x139/0x170 [ 30.305163] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.305693] do_vmi_munmap+0x1f1/0x2b0 [ 30.306159] __vm_munmap+0x138/0x3a0 [ 30.306603] __x64_sys_munmap+0x59/0x80 [ 30.307097] do_syscall_64+0x3f/0x90 [ 30.307553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.308169] [ 30.308374] The buggy address belongs to the object at ffff8880167dc1d0 [ 30.308374] which belongs to the cache vm_area_struct of size 168 [ 30.309765] The buggy address is located 88 bytes inside of [ 30.309765] freed 168-byte region [ffff8880167dc1d0, ffff8880167dc278) [ 30.311092] [ 30.311311] The buggy address belongs to the physical page: [ 30.311986] page:00000000b70226d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167dc [ 30.313102] memcg:ffff8880096b6901 [ 30.313529] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.314179] page_type: 0xffffffff() [ 30.314635] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.315558] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096b6901 [ 30.316469] page dumped because: kasan: bad access detected [ 30.317134] [ 30.317353] Memory state around the buggy address: [ 30.317940] ffff8880167dc100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.318803] ffff8880167dc180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.319677] >ffff8880167dc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.320537] ^ [ 30.321096] ffff8880167dc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.321956] ffff8880167dc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.322813] ================================================================== [ 30.323823] Disabling lock debugging due to kernel taint [ 32.354508] BUG: Bad rss-counter state mm:0000000019aa1c59 type:MM_FILEPAGES val:33 [ 32.356010] BUG: Bad rss-counter state mm:0000000019aa1c59 type:MM_ANONPAGES val:22 [ 32.798557] BUG: Bad rss-counter state mm:00000000b0522518 type:MM_FILEPAGES val:33 [ 32.799566] BUG: Bad rss-counter state mm:00000000b0522518 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7506' (ECDSA) to the list of known hosts. 2023/06/20 16:05:18 fuzzer started 2023/06/20 16:05:19 dialing manager at localhost:36067 2023/06/20 16:05:19 checking machine... 2023/06/20 16:05:19 checking revisions... [ 33.517166] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:05:19 testing simple program... [ 33.556894] cgroup: Unknown subsys name 'net' [ 33.608499] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:05:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800da07310 RCX=ffff88800da073b0 RDX=1ffff11001b40e6d RSI=ffff88800da073a8 RDI=ffffffff813ad720 RBP=ffff88800da07368 RSP=ffff88800da072f8 R8 =0000000000000001 R9 =ffff88800da07350 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800da073d8 R13=0000000000000000 R14=ffff88800da08000 R15=0000000000000020 RIP=ffffffff811303b2 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 00007fc89d892900 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=00007f6eb1809650 CR3=000000000d9bc000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c7a6afd4bbf9982400000000000ae988 XMM05=64e469ac16fb895b0000000000132da8 XMM06=c291bd5c70af25b90000000000131b98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=ffff8880160d0e48 RCX=0000000000000000 RDX=ffff88801691b680 RSI=ffffffff818defba RDI=0000000000000005 RBP=ffff8880160d0c40 RSP=ffff888016ac7ca0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff8880160d0cc8 R15=ffff8880160d0d18 RIP=ffffffff814c0880 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 00007f6eb1254900 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=00007f6eb180b618 CR3=0000000014576000 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