syzkaller login: [ 31.244208] BUG: Bad rss-counter state mm:00000000c316e1a9 type:MM_FILEPAGES val:33 [ 31.245224] BUG: Bad rss-counter state mm:00000000c316e1a9 type:MM_ANONPAGES val:22 [ 31.390713] ================================================================== [ 31.391802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.392955] Read of size 8 at addr ffff88800dfa4058 by task sshd/219 [ 31.393889] [ 31.394087] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.394870] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.395799] Call Trace: [ 31.396090] [ 31.396353] dump_stack_lvl+0x91/0xf0 [ 31.396812] print_report+0xcc/0x620 [ 31.397251] ? __virt_addr_valid+0x102/0x340 [ 31.397765] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.398328] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.398892] kasan_report+0xbe/0xf0 [ 31.399331] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.399900] vma_interval_tree_remove+0xc75/0xec0 [ 31.400448] vma_prepare+0xc54/0x11a0 [ 31.400906] __split_vma+0x5af/0x950 [ 31.401342] ? __pfx___split_vma+0x10/0x10 [ 31.401830] ? find_held_lock+0x2c/0x110 [ 31.402303] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.402820] ? lock_is_held_type+0x9f/0x120 [ 31.403308] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.403869] ? mtree_range_walk+0x632/0x900 [ 31.404369] ? mas_walk+0x5c7/0x7c0 [ 31.404828] do_vmi_munmap+0x1f1/0x2b0 [ 31.405278] mmap_region+0x1f9/0x2660 [ 31.405724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.406195] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.406851] ? __pfx_lock_acquire+0x10/0x10 [ 31.407335] ? __pfx_mmap_region+0x10/0x10 [ 31.407831] ? security_mmap_addr+0x7d/0xa0 [ 31.408319] ? get_unmapped_area+0x1f5/0x3f0 [ 31.408846] do_mmap+0x854/0xf00 [ 31.409246] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.409700] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.410220] ksys_mmap_pgoff+0x3af/0x500 [ 31.410686] do_syscall_64+0x3f/0x90 [ 31.411130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.411718] RIP: 0033:0x7f2021165d82 [ 31.412135] 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 [ 31.414128] RSP: 002b:00007ffe505c1ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.414958] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2021165d82 [ 31.415746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f202059f000 [ 31.416550] RBP: 00007f202059f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.417342] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c358483ec0 [ 31.418154] R13: 00007ffe505c1ad0 R14: 00007ffe505c1b00 R15: 00007ffe505c1e60 [ 31.418952] [ 31.419223] [ 31.419425] Allocated by task 212: [ 31.419824] kasan_save_stack+0x22/0x50 [ 31.420295] kasan_set_track+0x25/0x30 [ 31.420762] __kasan_slab_alloc+0x59/0x70 [ 31.421248] kmem_cache_alloc+0x16b/0x370 [ 31.421728] vm_area_dup+0x20/0x160 [ 31.422151] __split_vma+0x170/0x950 [ 31.422584] split_vma+0xc6/0x110 [ 31.423003] mprotect_fixup+0x8d2/0xb30 [ 31.423467] do_mprotect_pkey+0x87e/0xd40 [ 31.423948] __x64_sys_mprotect+0x78/0xc0 [ 31.424436] do_syscall_64+0x3f/0x90 [ 31.424896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.425496] [ 31.425694] Freed by task 19: [ 31.426047] kasan_save_stack+0x22/0x50 [ 31.426514] kasan_set_track+0x25/0x30 [ 31.426971] kasan_save_free_info+0x2b/0x50 [ 31.427459] __kasan_slab_free+0x10a/0x190 [ 31.427947] kmem_cache_free+0x10d/0x4d0 [ 31.428425] rcu_core+0x8c8/0x2860 [ 31.428848] __do_softirq+0x1b7/0x7d4 [ 31.429293] [ 31.429501] Last potentially related work creation: [ 31.430040] kasan_save_stack+0x22/0x50 [ 31.430503] __kasan_record_aux_stack+0x8e/0xa0 [ 31.431034] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.431629] remove_vma+0x139/0x170 [ 31.432046] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.432573] do_vmi_munmap+0x1f1/0x2b0 [ 31.433027] __vm_munmap+0x138/0x3a0 [ 31.433462] __x64_sys_munmap+0x59/0x80 [ 31.433928] do_syscall_64+0x3f/0x90 [ 31.434369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.434962] [ 31.435165] Second to last potentially related work creation: [ 31.435790] kasan_save_stack+0x22/0x50 [ 31.436254] __kasan_record_aux_stack+0x8e/0xa0 [ 31.436800] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.437402] remove_vma+0x139/0x170 [ 31.437829] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.438350] do_vmi_munmap+0x1f1/0x2b0 [ 31.438810] mmap_region+0x1f9/0x2660 [ 31.439257] do_mmap+0x854/0xf00 [ 31.439661] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.440118] ksys_mmap_pgoff+0x3af/0x500 [ 31.440606] do_syscall_64+0x3f/0x90 [ 31.441058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.441671] [ 31.441877] The buggy address belongs to the object at ffff88800dfa4000 [ 31.441877] which belongs to the cache vm_area_struct of size 168 [ 31.443261] The buggy address is located 88 bytes inside of [ 31.443261] freed 168-byte region [ffff88800dfa4000, ffff88800dfa40a8) [ 31.444577] [ 31.444779] The buggy address belongs to the physical page: [ 31.445395] page:000000008b2c9dca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfa4 [ 31.446407] memcg:ffff88800df8de01 [ 31.446808] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.447464] page_type: 0xffffffff() [ 31.447888] raw: 0100000000000200 ffff88800879fc80 ffffea00003c0f80 dead000000000007 [ 31.448765] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df8de01 [ 31.449614] page dumped because: kasan: bad access detected [ 31.450238] [ 31.450435] Memory state around the buggy address: [ 31.450980] ffff88800dfa3f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.451781] ffff88800dfa3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.452594] >ffff88800dfa4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.453383] ^ [ 31.454064] ffff88800dfa4080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.454853] ffff88800dfa4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.455642] ================================================================== [ 31.456636] Disabling lock debugging due to kernel taint [ 33.438845] BUG: Bad rss-counter state mm:00000000d3c0e32b type:MM_FILEPAGES val:33 [ 33.440014] BUG: Bad rss-counter state mm:00000000d3c0e32b type:MM_ANONPAGES val:22 [ 33.915839] BUG: Bad rss-counter state mm:000000002a445453 type:MM_FILEPAGES val:33 [ 33.917515] BUG: Bad rss-counter state mm:000000002a445453 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29396' (ECDSA) to the list of known hosts. 2023/06/19 21:06:41 fuzzer started 2023/06/19 21:06:41 dialing manager at localhost:44161 2023/06/19 21:06:41 checking machine... 2023/06/19 21:06:41 checking revisions... [ 34.690365] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:06:41 testing simple program... [ 34.737216] cgroup: Unknown subsys name 'net' [ 34.782499] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:06:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018c9f898 RCX=ffff88800fc2b934 RDX=ffff888018d951c0 RSI=ffffffff83868f73 RDI=0000000000000005 RBP=ffff88800f187000 RSP=ffff888018c9f830 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800fc2b8c0 R13=0000000000001000 R14=ffff88800f187579 R15=ffff88800f187600 RIP=ffffffff83868f82 RFL=00000293 [--S-A-C] 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 00007fa7fe957900 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=00007fa7fef0e618 CR3=000000000ed74000 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=dffffc0000000000 RBX=ffff88806cf09a78 RCX=0000000000000002 RDX=1ffff1100d9e1351 RSI=ffff888008e27dc0 RDI=ffff88806cf09a88 RBP=ffff888008e27dc0 RSP=ffff88806cf099d0 R8 =ffffffff864b115c R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b523e R12=0000000000000008 R13=ffff88806cf02000 R14=ffff888008e27dc8 R15=ffff88806cf09a78 RIP=ffffffff81130468 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=00007f730c0879a0 CR3=000000000e4ec000 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=2030343a36303a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a36303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000