syzkaller login: [ 39.259491] BUG: Bad rss-counter state mm:00000000c18fd5cb type:MM_FILEPAGES val:33 [ 39.261088] BUG: Bad rss-counter state mm:00000000c18fd5cb type:MM_ANONPAGES val:22 [ 39.416934] ================================================================== [ 39.417866] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.418818] Read of size 8 at addr ffff88800e56dc20 by task sshd/218 [ 39.419601] [ 39.419833] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.420848] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.421809] Call Trace: [ 39.422134] [ 39.422424] dump_stack_lvl+0x91/0xf0 [ 39.422936] print_report+0xcc/0x620 [ 39.423420] ? __virt_addr_valid+0x102/0x340 [ 39.423996] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.424621] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.425239] kasan_report+0xbe/0xf0 [ 39.425720] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.426342] vma_interval_tree_remove+0xc75/0xec0 [ 39.426942] vma_prepare+0xc54/0x11a0 [ 39.427419] __split_vma+0x5af/0x950 [ 39.427910] ? __pfx___split_vma+0x10/0x10 [ 39.428442] ? find_held_lock+0x2c/0x110 [ 39.428975] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.429536] ? lock_is_held_type+0x9f/0x120 [ 39.430070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.430677] ? mtree_range_walk+0x632/0x900 [ 39.431226] ? mas_walk+0x5c7/0x7c0 [ 39.431713] do_vmi_munmap+0x1f1/0x2b0 [ 39.432221] mmap_region+0x1f9/0x2660 [ 39.432710] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.433224] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.433939] ? __pfx_lock_acquire+0x10/0x10 [ 39.434483] ? __pfx_mmap_region+0x10/0x10 [ 39.435015] ? security_mmap_addr+0x7d/0xa0 [ 39.435558] ? get_unmapped_area+0x1f5/0x3f0 [ 39.436131] do_mmap+0x854/0xf00 [ 39.436580] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.437091] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.437662] ksys_mmap_pgoff+0x3af/0x500 [ 39.438179] do_syscall_64+0x3f/0x90 [ 39.438668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.439328] RIP: 0033:0x7fc075048d82 [ 39.439803] 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 [ 39.441971] RSP: 002b:00007ffcbae49108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.442903] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc075048d82 [ 39.443769] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc074482000 [ 39.444669] RBP: 00007fc074482000 R08: 0000000000000009 R09: 0000000000001000 [ 39.445543] R10: 0000000000000812 R11: 0000000000000206 R12: 00005599631bfec0 [ 39.446418] R13: 00007ffcbae49120 R14: 00007ffcbae49150 R15: 00007ffcbae494b0 [ 39.447276] [ 39.447571] [ 39.447798] Allocated by task 211: [ 39.448230] kasan_save_stack+0x22/0x50 [ 39.448750] kasan_set_track+0x25/0x30 [ 39.449253] __kasan_slab_alloc+0x59/0x70 [ 39.449781] kmem_cache_alloc+0x16b/0x370 [ 39.450301] vm_area_dup+0x20/0x160 [ 39.450760] __split_vma+0x170/0x950 [ 39.451237] split_vma+0xc6/0x110 [ 39.451692] mprotect_fixup+0x8d2/0xb30 [ 39.452217] do_mprotect_pkey+0x87e/0xd40 [ 39.452744] __x64_sys_mprotect+0x78/0xc0 [ 39.453269] do_syscall_64+0x3f/0x90 [ 39.453756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.454405] [ 39.454620] Freed by task 211: [ 39.455014] kasan_save_stack+0x22/0x50 [ 39.455525] kasan_set_track+0x25/0x30 [ 39.456036] kasan_save_free_info+0x2b/0x50 [ 39.456572] __kasan_slab_free+0x10a/0x190 [ 39.457123] kmem_cache_free+0x10d/0x4d0 [ 39.457638] rcu_core+0x8c8/0x2860 [ 39.458093] __do_softirq+0x1b7/0x7d4 [ 39.458588] [ 39.458807] Last potentially related work creation: [ 39.459395] kasan_save_stack+0x22/0x50 [ 39.459915] __kasan_record_aux_stack+0x8e/0xa0 [ 39.460504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.461158] remove_vma+0x139/0x170 [ 39.461617] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.462260] do_vmi_munmap+0x1f1/0x2b0 [ 39.462757] __vm_munmap+0x138/0x3a0 [ 39.463243] __x64_sys_munmap+0x59/0x80 [ 39.463750] do_syscall_64+0x3f/0x90 [ 39.464252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.464904] [ 39.465121] The buggy address belongs to the object at ffff88800e56dbc8 [ 39.465121] which belongs to the cache vm_area_struct of size 168 [ 39.466598] The buggy address is located 88 bytes inside of [ 39.466598] freed 168-byte region [ffff88800e56dbc8, ffff88800e56dc70) [ 39.468019] [ 39.468238] The buggy address belongs to the physical page: [ 39.468895] page:00000000bfbea712 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe56d [ 39.469997] memcg:ffff8880098a4e01 [ 39.470426] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.471082] page_type: 0xffffffff() [ 39.471539] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 39.472461] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098a4e01 [ 39.473392] page dumped because: kasan: bad access detected [ 39.474063] [ 39.474283] Memory state around the buggy address: [ 39.474874] ffff88800e56db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.475740] ffff88800e56db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.476617] >ffff88800e56dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.477483] ^ [ 39.478017] ffff88800e56dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.478888] ffff88800e56dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.479759] ================================================================== [ 39.480865] Disabling lock debugging due to kernel taint [ 41.648622] BUG: Bad rss-counter state mm:00000000bc0ed3b2 type:MM_FILEPAGES val:33 [ 41.649769] BUG: Bad rss-counter state mm:00000000bc0ed3b2 type:MM_ANONPAGES val:22 [ 42.100778] BUG: Bad rss-counter state mm:00000000b9bfb988 type:MM_FILEPAGES val:33 [ 42.101998] BUG: Bad rss-counter state mm:00000000b9bfb988 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6887' (ECDSA) to the list of known hosts. 2023/06/19 21:48:24 fuzzer started 2023/06/19 21:48:24 dialing manager at localhost:44161 2023/06/19 21:48:24 checking machine... 2023/06/19 21:48:24 checking revisions... [ 42.712328] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:48:24 testing simple program... [ 42.759776] cgroup: Unknown subsys name 'net' [ 42.808280] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:48:23 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff846000aa RCX=0000000000000001 RDX=1ffff11002b01e5c RSI=ffff88801580ff48 RDI=ffffffff846000aa RBP=ffff88801580f2e0 RSP=ffff88801580f258 R8 =0000000000000001 R9 =ffff88801580f2c8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88801580f350 R13=0000000000000000 R14=ffff8880146c3680 R15=0000000000092cc0 RIP=ffffffff811fc7bf RFL=00000296 [--S-AP-] 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 00007f5aa7a06900 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=00007f5aa6e152b0 CR3=000000000cb8a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=080d41a006a20f4f00000000000ae988 XMM05=6c97973ad88ef2c20000000000135140 XMM06=806171799158d9670000000000133bc0 XMM07=fb795ef6d65770560000000000124410 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff818470dc RCX=0000000000000001 RDX=1ffff11002d41ede RSI=ffff888016a0fa68 RDI=ffffffff818470dc RBP=ffffffff818470dc RSP=ffff888016a0f640 R8 =0000000000000001 R9 =ffff888016a0f6d8 R10=0000000000038001 R11=0000000000020c48 R12=ffff888016a0f760 R13=0000000000000000 R14=ffff88800dc29b40 R15=0000000000092cc0 RIP=ffffffff811fc6f7 RFL=00000292 [--S-A--] 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 00007fa64f5a6900 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=00007ffc7ab4a000 CR3=0000000016eb4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000