syzkaller login: [ 28.819740] BUG: Bad rss-counter state mm:00000000cc44ae59 type:MM_FILEPAGES val:33 [ 28.821708] BUG: Bad rss-counter state mm:00000000cc44ae59 type:MM_ANONPAGES val:22 [ 29.031787] ================================================================== [ 29.032663] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.033550] Read of size 8 at addr ffff88801a01f798 by task sshd/222 [ 29.034275] [ 29.034489] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.035408] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.036406] Call Trace: [ 29.036712] [ 29.037003] dump_stack_lvl+0x91/0xf0 [ 29.037471] print_report+0xcc/0x620 [ 29.037941] ? __virt_addr_valid+0x102/0x340 [ 29.038465] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.039047] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.039625] kasan_report+0xbe/0xf0 [ 29.040080] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.040664] vma_interval_tree_remove+0xc75/0xec0 [ 29.041258] vma_prepare+0xc54/0x11a0 [ 29.041718] __split_vma+0x5af/0x950 [ 29.042165] ? __pfx___split_vma+0x10/0x10 [ 29.042676] ? find_held_lock+0x2c/0x110 [ 29.043174] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.043713] ? lock_is_held_type+0x9f/0x120 [ 29.044224] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.044825] ? mtree_range_walk+0x632/0x900 [ 29.045363] ? mas_walk+0x5c7/0x7c0 [ 29.045820] do_vmi_munmap+0x1f1/0x2b0 [ 29.046303] mmap_region+0x1f9/0x2660 [ 29.046764] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.047252] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.047930] ? __pfx_lock_acquire+0x10/0x10 [ 29.048443] ? __pfx_mmap_region+0x10/0x10 [ 29.048951] ? security_mmap_addr+0x7d/0xa0 [ 29.049465] ? get_unmapped_area+0x1f5/0x3f0 [ 29.049989] do_mmap+0x854/0xf00 [ 29.050408] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.050880] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.051418] ksys_mmap_pgoff+0x3af/0x500 [ 29.051903] do_syscall_64+0x3f/0x90 [ 29.052360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.052982] RIP: 0033:0x7f205f631d82 [ 29.053424] 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 [ 29.055448] RSP: 002b:00007fff38c90588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.056315] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f205f631d82 [ 29.057137] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f205ea6b000 [ 29.057951] RBP: 00007f205ea6b000 R08: 0000000000000009 R09: 0000000000001000 [ 29.058762] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6fca78ec0 [ 29.059575] R13: 00007fff38c905a0 R14: 00007fff38c905d0 R15: 00007fff38c90930 [ 29.060399] [ 29.060676] [ 29.060896] Allocated by task 212: [ 29.061307] kasan_save_stack+0x22/0x50 [ 29.061788] kasan_set_track+0x25/0x30 [ 29.062261] __kasan_slab_alloc+0x59/0x70 [ 29.062761] kmem_cache_alloc+0x16b/0x370 [ 29.063253] vm_area_dup+0x20/0x160 [ 29.063688] __split_vma+0x170/0x950 [ 29.064133] split_vma+0xc6/0x110 [ 29.064558] mprotect_fixup+0x8d2/0xb30 [ 29.065065] do_mprotect_pkey+0x87e/0xd40 [ 29.065572] __x64_sys_mprotect+0x78/0xc0 [ 29.066070] do_syscall_64+0x3f/0x90 [ 29.066521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.067138] [ 29.067346] Freed by task 212: [ 29.067718] kasan_save_stack+0x22/0x50 [ 29.068196] kasan_set_track+0x25/0x30 [ 29.068670] kasan_save_free_info+0x2b/0x50 [ 29.069191] __kasan_slab_free+0x10a/0x190 [ 29.069703] kmem_cache_free+0x10d/0x4d0 [ 29.070194] rcu_core+0x8c8/0x2860 [ 29.070618] __do_softirq+0x1b7/0x7d4 [ 29.071071] [ 29.071280] Last potentially related work creation: [ 29.071833] kasan_save_stack+0x22/0x50 [ 29.072322] __kasan_record_aux_stack+0x8e/0xa0 [ 29.072884] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.073504] remove_vma+0x139/0x170 [ 29.073932] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.074463] do_vmi_munmap+0x1f1/0x2b0 [ 29.074926] __vm_munmap+0x138/0x3a0 [ 29.075375] __x64_sys_munmap+0x59/0x80 [ 29.075849] do_syscall_64+0x3f/0x90 [ 29.076302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.077032] [ 29.077248] The buggy address belongs to the object at ffff88801a01f740 [ 29.077248] which belongs to the cache vm_area_struct of size 168 [ 29.078727] The buggy address is located 88 bytes inside of [ 29.078727] freed 168-byte region [ffff88801a01f740, ffff88801a01f7e8) [ 29.080143] [ 29.080362] The buggy address belongs to the physical page: [ 29.081034] page:000000007338e168 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a01f [ 29.082108] memcg:ffff88800f695f01 [ 29.082535] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.083188] page_type: 0xffffffff() [ 29.083635] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.084547] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f695f01 [ 29.085471] page dumped because: kasan: bad access detected [ 29.086124] [ 29.086340] Memory state around the buggy address: [ 29.086931] ffff88801a01f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.087795] ffff88801a01f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.088658] >ffff88801a01f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.089522] ^ [ 29.090011] ffff88801a01f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.090874] ffff88801a01f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.091718] ================================================================== [ 29.092655] Disabling lock debugging due to kernel taint [ 31.004207] BUG: Bad rss-counter state mm:000000008a339d51 type:MM_FILEPAGES val:33 [ 31.005390] BUG: Bad rss-counter state mm:000000008a339d51 type:MM_ANONPAGES val:22 [ 31.487203] BUG: Bad rss-counter state mm:00000000532e8d88 type:MM_FILEPAGES val:33 [ 31.488143] BUG: Bad rss-counter state mm:00000000532e8d88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33327' (ECDSA) to the list of known hosts. 2023/06/21 06:40:30 fuzzer started 2023/06/21 06:40:30 dialing manager at localhost:36067 2023/06/21 06:40:30 checking machine... 2023/06/21 06:40:30 checking revisions... [ 32.216090] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:40:30 testing simple program... [ 32.264757] cgroup: Unknown subsys name 'net' [ 32.311002] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:40:29 Registers: info registers vcpu 0 RAX=ffff888008da0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d9f901 RSI=ffff888008d9f948 RDI=ffff888008d9f988 RBP=ffff888008d9f948 RSP=ffff888008d9f890 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff888008d98000 R14=ffff888008d9f948 R15=ffff888008d9f978 RIP=ffffffff811304ce RFL=00000286 [--S--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=00007fb769aa40b0 CR3=0000000018ddc000 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=30343a3630203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303132 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888008e37948 RSI=ffffffff8118d7d9 RDI=ffff888008e37948 RBP=ffff888008e379e0 RSP=ffff888008e37930 R8 =0000000000000001 R9 =ffff888008e37988 R10=0000000000038001 R11=00000000000b5d59 R12=ffff888008e37a10 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff888008e37948 RIP=ffffffff811305e8 RFL=00000202 [-------] 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=00007f6709b3de50 CR3=000000000c8ea000 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=6bf80c924ed27894f045717b33497dce XMM02=000000000011a1f0ec2efd57dc4c00df XMM03=0000000000120f4050ca8b4366ed68e9 XMM04=78b3eac7a5b6c7c100000000000ae988 XMM05=19e9129bd510f2350000000000131450 XMM06=60bf6a64b8cc117900000000001302b8 XMM07=e042d86d42eb936e00000000001211c0 XMM08=50ca8b4366ed68e9000000000011a250 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000