syzkaller login: [ 31.348920] BUG: Bad rss-counter state mm:0000000021d76503 type:MM_FILEPAGES val:33 [ 31.349948] BUG: Bad rss-counter state mm:0000000021d76503 type:MM_ANONPAGES val:22 [ 31.512512] ================================================================== [ 31.513441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.514385] Read of size 8 at addr ffff88800cae4058 by task sshd/221 [ 31.515161] [ 31.515379] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.516380] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.517359] Call Trace: [ 31.517680] [ 31.517987] dump_stack_lvl+0x91/0xf0 [ 31.518476] print_report+0xcc/0x620 [ 31.518956] ? __virt_addr_valid+0x102/0x340 [ 31.519506] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.520146] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.520769] kasan_report+0xbe/0xf0 [ 31.521251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.521886] vma_interval_tree_remove+0xc75/0xec0 [ 31.522488] vma_prepare+0xc54/0x11a0 [ 31.522973] __split_vma+0x5af/0x950 [ 31.523460] ? __pfx___split_vma+0x10/0x10 [ 31.524003] ? find_held_lock+0x2c/0x110 [ 31.524525] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.525089] ? lock_is_held_type+0x9f/0x120 [ 31.525632] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.526233] ? mtree_range_walk+0x632/0x900 [ 31.526782] ? mas_walk+0x5c7/0x7c0 [ 31.527254] do_vmi_munmap+0x1f1/0x2b0 [ 31.527749] mmap_region+0x1f9/0x2660 [ 31.528257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.528768] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.529479] ? __pfx_lock_acquire+0x10/0x10 [ 31.530007] ? __pfx_mmap_region+0x10/0x10 [ 31.530534] ? security_mmap_addr+0x7d/0xa0 [ 31.531069] ? get_unmapped_area+0x1f5/0x3f0 [ 31.531614] do_mmap+0x854/0xf00 [ 31.532064] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.532558] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.533121] ksys_mmap_pgoff+0x3af/0x500 [ 31.533624] do_syscall_64+0x3f/0x90 [ 31.534100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.534743] RIP: 0033:0x7ff74fee9d82 [ 31.535193] 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 [ 31.537295] RSP: 002b:00007ffe5e57e1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.538196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff74fee9d82 [ 31.539033] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff74f323000 [ 31.539878] RBP: 00007ff74f323000 R08: 0000000000000009 R09: 0000000000001000 [ 31.540718] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565fcbb5f70 [ 31.541554] R13: 00007ffe5e57e1c0 R14: 00007ffe5e57e1f0 R15: 00007ffe5e57e550 [ 31.542402] [ 31.542692] [ 31.542906] Allocated by task 214: [ 31.543337] kasan_save_stack+0x22/0x50 [ 31.543843] kasan_set_track+0x25/0x30 [ 31.544353] __kasan_slab_alloc+0x59/0x70 [ 31.544884] kmem_cache_alloc+0x16b/0x370 [ 31.545399] vm_area_dup+0x20/0x160 [ 31.545850] __split_vma+0x170/0x950 [ 31.546313] split_vma+0xc6/0x110 [ 31.546748] mprotect_fixup+0x8d2/0xb30 [ 31.547245] do_mprotect_pkey+0x87e/0xd40 [ 31.547763] __x64_sys_mprotect+0x78/0xc0 [ 31.548298] do_syscall_64+0x3f/0x90 [ 31.548771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.549408] [ 31.549624] Freed by task 214: [ 31.550062] kasan_save_stack+0x22/0x50 [ 31.550647] kasan_set_track+0x25/0x30 [ 31.551145] kasan_save_free_info+0x2b/0x50 [ 31.551674] __kasan_slab_free+0x10a/0x190 [ 31.552216] kmem_cache_free+0x10d/0x4d0 [ 31.552730] rcu_core+0x8c8/0x2860 [ 31.553174] __do_softirq+0x1b7/0x7d4 [ 31.553658] [ 31.553875] Last potentially related work creation: [ 31.554461] kasan_save_stack+0x22/0x50 [ 31.554970] __kasan_record_aux_stack+0x8e/0xa0 [ 31.555534] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.556204] remove_vma+0x139/0x170 [ 31.556653] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.557225] do_vmi_munmap+0x1f1/0x2b0 [ 31.557726] __vm_munmap+0x138/0x3a0 [ 31.558208] __x64_sys_munmap+0x59/0x80 [ 31.558716] do_syscall_64+0x3f/0x90 [ 31.559202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.559869] [ 31.560093] The buggy address belongs to the object at ffff88800cae4000 [ 31.560093] which belongs to the cache vm_area_struct of size 168 [ 31.561613] The buggy address is located 88 bytes inside of [ 31.561613] freed 168-byte region [ffff88800cae4000, ffff88800cae40a8) [ 31.563057] [ 31.563281] The buggy address belongs to the physical page: [ 31.563977] page:00000000dbd141d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcae4 [ 31.565096] memcg:ffff88801a17ae01 [ 31.565537] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.566196] page_type: 0xffffffff() [ 31.566660] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.567608] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a17ae01 [ 31.568548] page dumped because: kasan: bad access detected [ 31.569233] [ 31.569452] Memory state around the buggy address: [ 31.570052] ffff88800cae3f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.570928] ffff88800cae3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.571812] >ffff88800cae4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.572707] ^ [ 31.573458] ffff88800cae4080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.574335] ffff88800cae4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.575209] ================================================================== [ 31.576214] Disabling lock debugging due to kernel taint [ 34.103289] BUG: Bad rss-counter state mm:000000002103e46d type:MM_FILEPAGES val:33 [ 34.104405] BUG: Bad rss-counter state mm:000000002103e46d type:MM_ANONPAGES val:22 [ 34.664937] BUG: Bad rss-counter state mm:0000000037c69c83 type:MM_FILEPAGES val:33 [ 34.666127] BUG: Bad rss-counter state mm:0000000037c69c83 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64739' (ECDSA) to the list of known hosts. 2023/06/21 03:16:51 fuzzer started 2023/06/21 03:16:51 dialing manager at localhost:36067 2023/06/21 03:16:51 checking machine... 2023/06/21 03:16:51 checking revisions... [ 35.327452] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:16:52 testing simple program... [ 35.375390] cgroup: Unknown subsys name 'net' [ 35.421397] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:16:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8186c046 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff88800d867dd0 RDI=ffffffff8186c046 RBP=ffffffff8186c046 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000008a6b1 R12=0000000000000001 R13=0000000000000000 R14=ffff888016cab680 R15=ffff88800b336d80 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007f8d73b7a900 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=00007f47cf250c70 CR3=000000000edf2000 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=ff0000000000ffff0000000000ff0000 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 info registers vcpu 1 RAX=0000000000000286 RBX=ffff88800ca3dc00 RCX=00000000fffffbf8 RDX=0000000000000006 RSI=ffff88807ffdc000 RDI=ffff88800b336d80 RBP=ffff88800b336d80 RSP=ffff8880164af888 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000fffffbf8 R15=ffff88800b336d80 RIP=ffffffff818398f0 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 00007f39be2df700 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=00007ffd626095e8 CR3=000000000f642000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732031353a3631 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323332 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000