syzkaller login: [ 31.571379] BUG: Bad rss-counter state mm:00000000be010981 type:MM_FILEPAGES val:33 [ 31.572848] BUG: Bad rss-counter state mm:00000000be010981 type:MM_ANONPAGES val:22 [ 31.748082] ================================================================== [ 31.748939] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.749840] Read of size 8 at addr ffff88800ea693f8 by task sshd/219 [ 31.750573] [ 31.750878] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.751696] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.752608] Call Trace: [ 31.752909] [ 31.753393] dump_stack_lvl+0x91/0xf0 [ 31.754105] print_report+0xcc/0x620 [ 31.754802] ? __virt_addr_valid+0x102/0x340 [ 31.755596] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.756485] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.757404] kasan_report+0xbe/0xf0 [ 31.758086] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.758846] vma_interval_tree_remove+0xc75/0xec0 [ 31.759575] vma_prepare+0xc54/0x11a0 [ 31.760149] __split_vma+0x5af/0x950 [ 31.760715] ? __pfx___split_vma+0x10/0x10 [ 31.761375] ? find_held_lock+0x2c/0x110 [ 31.762000] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.762672] ? lock_is_held_type+0x9f/0x120 [ 31.763315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.764058] ? mtree_range_walk+0x632/0x900 [ 31.764718] ? mas_walk+0x5c7/0x7c0 [ 31.765316] do_vmi_munmap+0x1f1/0x2b0 [ 31.765915] mmap_region+0x1f9/0x2660 [ 31.766514] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.767040] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.767751] ? __pfx_lock_acquire+0x10/0x10 [ 31.768289] ? __pfx_mmap_region+0x10/0x10 [ 31.768816] ? security_mmap_addr+0x7d/0xa0 [ 31.769378] ? get_unmapped_area+0x1f5/0x3f0 [ 31.769927] do_mmap+0x854/0xf00 [ 31.770367] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.770860] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.771426] ksys_mmap_pgoff+0x3af/0x500 [ 31.771940] do_syscall_64+0x3f/0x90 [ 31.772423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.773095] RIP: 0033:0x7fb0ca863d82 [ 31.773553] 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 [ 31.775697] RSP: 002b:00007ffe8d084ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.776604] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0ca863d82 [ 31.777474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0c9c9d000 [ 31.778331] RBP: 00007fb0c9c9d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.779240] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561f0d91f60 [ 31.780150] R13: 00007ffe8d084bc0 R14: 00007ffe8d084bf0 R15: 00007ffe8d084f50 [ 31.781074] [ 31.781382] [ 31.781607] Allocated by task 212: [ 31.782063] kasan_save_stack+0x22/0x50 [ 31.782601] kasan_set_track+0x25/0x30 [ 31.783125] __kasan_slab_alloc+0x59/0x70 [ 31.783677] kmem_cache_alloc+0x16b/0x370 [ 31.784225] vm_area_dup+0x20/0x160 [ 31.784703] __split_vma+0x170/0x950 [ 31.785201] split_vma+0xc6/0x110 [ 31.785656] mprotect_fixup+0x8d2/0xb30 [ 31.786185] do_mprotect_pkey+0x87e/0xd40 [ 31.786710] __x64_sys_mprotect+0x78/0xc0 [ 31.787249] do_syscall_64+0x3f/0x90 [ 31.787741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.788409] [ 31.788633] Freed by task 212: [ 31.789061] kasan_save_stack+0x22/0x50 [ 31.789579] kasan_set_track+0x25/0x30 [ 31.790101] kasan_save_free_info+0x2b/0x50 [ 31.790657] __kasan_slab_free+0x10a/0x190 [ 31.791218] kmem_cache_free+0x10d/0x4d0 [ 31.791742] rcu_core+0x8c8/0x2860 [ 31.792200] __do_softirq+0x1b7/0x7d4 [ 31.792692] [ 31.792915] Last potentially related work creation: [ 31.793537] kasan_save_stack+0x22/0x50 [ 31.794052] __kasan_record_aux_stack+0x8e/0xa0 [ 31.794650] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.795318] remove_vma+0x139/0x170 [ 31.795788] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.796365] do_vmi_munmap+0x1f1/0x2b0 [ 31.796866] __vm_munmap+0x138/0x3a0 [ 31.797374] __x64_sys_munmap+0x59/0x80 [ 31.797891] do_syscall_64+0x3f/0x90 [ 31.798377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.799042] [ 31.799270] The buggy address belongs to the object at ffff88800ea693a0 [ 31.799270] which belongs to the cache vm_area_struct of size 168 [ 31.800817] The buggy address is located 88 bytes inside of [ 31.800817] freed 168-byte region [ffff88800ea693a0, ffff88800ea69448) [ 31.802284] [ 31.802509] The buggy address belongs to the physical page: [ 31.803201] page:000000009dfc9c52 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea69 [ 31.804319] memcg:ffff88800e0bbc01 [ 31.804765] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.805498] page_type: 0xffffffff() [ 31.805966] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a3f80 dead00000000000d [ 31.806982] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0bbc01 [ 31.807933] page dumped because: kasan: bad access detected [ 31.808608] [ 31.808825] Memory state around the buggy address: [ 31.809443] ffff88800ea69280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.810320] ffff88800ea69300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.811212] >ffff88800ea69380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.812078] ^ [ 31.812954] ffff88800ea69400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.813849] ffff88800ea69480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.814726] ================================================================== [ 31.815809] Disabling lock debugging due to kernel taint [ 34.565666] BUG: Bad rss-counter state mm:000000007d9bc3b9 type:MM_FILEPAGES val:33 [ 34.566937] BUG: Bad rss-counter state mm:000000007d9bc3b9 type:MM_ANONPAGES val:22 [ 35.120514] BUG: Bad rss-counter state mm:00000000260aeb23 type:MM_FILEPAGES val:33 [ 35.121513] BUG: Bad rss-counter state mm:00000000260aeb23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2305' (ECDSA) to the list of known hosts. 2023/06/20 12:23:21 fuzzer started 2023/06/20 12:23:21 dialing manager at localhost:36067 2023/06/20 12:23:21 checking machine... 2023/06/20 12:23:21 checking revisions... [ 35.776332] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:23:21 testing simple program... [ 35.831035] cgroup: Unknown subsys name 'net' [ 35.924613] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:23:20 Registers: info registers vcpu 0 RAX=1ffff11002b20ee4 RBX=000000000000000c RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000013 RDI=ffff888015907720 RBP=dffffc0000000000 RSP=ffff888015907630 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000013 R13=0000000000000000 R14=ffff8880159076c0 R15=ffff88800dab8910 RIP=ffffffff813ad61a 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 00007fed20a4f900 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=000055b954b06818 CR3=0000000009bba000 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=359eceb13e37639a00000000000ae988 XMM05=5a861367f90a572c0000000000132e20 XMM06=c291bd5c70af25b90000000000131ec0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000002 RSI=ffffffff81f16c03 RDI=ffff88800ec3f032 RBP=ffff8880195b5bd8 RSP=ffff88801037f938 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff81f16c31 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 00007fd271ce8900 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=00007fd27229d650 CR3=000000000f652000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000