syzkaller login: [ 31.970173] BUG: Bad rss-counter state mm:00000000cefbe95f type:MM_FILEPAGES val:33 [ 31.970956] BUG: Bad rss-counter state mm:00000000cefbe95f type:MM_ANONPAGES val:22 [ 32.104250] ================================================================== [ 32.104941] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.105642] Read of size 8 at addr ffff88801a1fbb38 by task sshd/221 [ 32.106239] [ 32.106400] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.107023] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.107745] Call Trace: [ 32.107981] [ 32.108319] dump_stack_lvl+0x91/0xf0 [ 32.108876] print_report+0xcc/0x620 [ 32.109257] ? __virt_addr_valid+0x102/0x340 [ 32.109671] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.110127] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.110575] kasan_report+0xbe/0xf0 [ 32.110919] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.111424] vma_interval_tree_remove+0xc75/0xec0 [ 32.111864] vma_prepare+0xc54/0x11a0 [ 32.112209] __split_vma+0x5af/0x950 [ 32.112549] ? __pfx___split_vma+0x10/0x10 [ 32.112960] ? find_held_lock+0x2c/0x110 [ 32.113345] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.113759] ? lock_is_held_type+0x9f/0x120 [ 32.114176] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.114635] ? mtree_range_walk+0x632/0x900 [ 32.115048] ? mas_walk+0x5c7/0x7c0 [ 32.115404] do_vmi_munmap+0x1f1/0x2b0 [ 32.115796] mmap_region+0x1f9/0x2660 [ 32.116154] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.116560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.117122] ? __pfx_lock_acquire+0x10/0x10 [ 32.117537] ? __pfx_mmap_region+0x10/0x10 [ 32.117927] ? security_mmap_addr+0x7d/0xa0 [ 32.118320] ? get_unmapped_area+0x1f5/0x3f0 [ 32.118726] do_mmap+0x854/0xf00 [ 32.119046] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.119412] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.119822] ksys_mmap_pgoff+0x3af/0x500 [ 32.120197] do_syscall_64+0x3f/0x90 [ 32.120565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.121066] RIP: 0033:0x7f64eb24dd82 [ 32.121405] 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 [ 32.123029] RSP: 002b:00007ffed8fbefa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.123714] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64eb24dd82 [ 32.124351] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64ea687000 [ 32.125019] RBP: 00007f64ea687000 R08: 0000000000000009 R09: 0000000000001000 [ 32.125663] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a117850ec0 [ 32.126314] R13: 00007ffed8fbefc0 R14: 00007ffed8fbeff0 R15: 00007ffed8fbf350 [ 32.126964] [ 32.127188] [ 32.127348] Allocated by task 214: [ 32.127674] kasan_save_stack+0x22/0x50 [ 32.128056] kasan_set_track+0x25/0x30 [ 32.128437] __kasan_slab_alloc+0x59/0x70 [ 32.128826] kmem_cache_alloc+0x16b/0x370 [ 32.129202] vm_area_dup+0x20/0x160 [ 32.129542] __split_vma+0x170/0x950 [ 32.129901] split_vma+0xc6/0x110 [ 32.130251] mprotect_fixup+0x8d2/0xb30 [ 32.130613] do_mprotect_pkey+0x87e/0xd40 [ 32.130993] __x64_sys_mprotect+0x78/0xc0 [ 32.131388] do_syscall_64+0x3f/0x90 [ 32.131729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.132203] [ 32.132359] Freed by task 19: [ 32.132638] kasan_save_stack+0x22/0x50 [ 32.133034] kasan_set_track+0x25/0x30 [ 32.133407] kasan_save_free_info+0x2b/0x50 [ 32.133799] __kasan_slab_free+0x10a/0x190 [ 32.134198] kmem_cache_free+0x10d/0x4d0 [ 32.134572] rcu_core+0x8c8/0x2860 [ 32.134906] __do_softirq+0x1b7/0x7d4 [ 32.135250] [ 32.135406] Last potentially related work creation: [ 32.135858] kasan_save_stack+0x22/0x50 [ 32.136246] __kasan_record_aux_stack+0x8e/0xa0 [ 32.136670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.137146] remove_vma+0x139/0x170 [ 32.137481] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.137880] do_vmi_munmap+0x1f1/0x2b0 [ 32.138238] __vm_munmap+0x138/0x3a0 [ 32.138576] __x64_sys_munmap+0x59/0x80 [ 32.138946] do_syscall_64+0x3f/0x90 [ 32.139298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.139770] [ 32.139926] The buggy address belongs to the object at ffff88801a1fbae0 [ 32.139926] which belongs to the cache vm_area_struct of size 168 [ 32.141030] The buggy address is located 88 bytes inside of [ 32.141030] freed 168-byte region [ffff88801a1fbae0, ffff88801a1fbb88) [ 32.142080] [ 32.142264] The buggy address belongs to the physical page: [ 32.142775] page:000000004c62fdaa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1fb [ 32.143538] memcg:ffff8880169d2101 [ 32.143841] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.144319] page_type: 0xffffffff() [ 32.144644] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.145312] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169d2101 [ 32.145998] page dumped because: kasan: bad access detected [ 32.146469] [ 32.146621] Memory state around the buggy address: [ 32.147036] ffff88801a1fba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.147691] ffff88801a1fba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.148330] >ffff88801a1fbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.149022] ^ [ 32.149488] ffff88801a1fbb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.150260] ffff88801a1fbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.150983] ================================================================== [ 32.151755] Disabling lock debugging due to kernel taint [ 34.229961] BUG: Bad rss-counter state mm:000000000888fb7b type:MM_FILEPAGES val:33 [ 34.230990] BUG: Bad rss-counter state mm:000000000888fb7b type:MM_ANONPAGES val:22 [ 34.619658] BUG: Bad rss-counter state mm:00000000f37aa2f8 type:MM_FILEPAGES val:33 [ 34.620401] BUG: Bad rss-counter state mm:00000000f37aa2f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30682' (ECDSA) to the list of known hosts. 2023/06/20 09:13:06 fuzzer started 2023/06/20 09:13:06 dialing manager at localhost:44161 2023/06/20 09:13:06 checking machine... 2023/06/20 09:13:06 checking revisions... [ 35.214939] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:13:06 testing simple program... [ 35.267294] cgroup: Unknown subsys name 'net' [ 35.298688] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:13:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801699fc48 RCX=ffffffff8191d880 RDX=dffffc0000000000 RSI=ffffffff818a42f3 RDI=ffff88801699fc80 RBP=ffffffff848d9e00 RSP=ffff88801699f970 R8 =0000000000000005 R9 =0000000000000000 R10=0000000010000000 R11=0000000000000001 R12=ffff888019dce000 R13=0000000000000000 R14=ffff888019dce068 R15=ffff88801683f6c8 RIP=ffffffff818a4316 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 00007fcdcf0268c0 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=00007fca1ba2b0b0 CR3=000000000e4d6000 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=00000000000000000000000000000000 XMM02=616c756765723a6d726f6674616c702b XMM03=00302e79726f74616c756765723a6d72 XMM04=2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f XMM05=00000004000000050000564804a57f20 XMM06=0000564804a4e0800000000600000004 XMM07=00000000000000000000000000000000 XMM08=616c756765723a6d726f6674616c702b XMM09=00000000000000000000000000000000 XMM10=00000000002000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015a9bad0 RBX=ffff888015a9bad0 RCX=ffff888015a98000 RDX=0000000000000000 RSI=0000000000000630 RDI=ffffea000056a600 RBP=0000000000000000 RSP=ffff88801039fd10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6996 R12=ffff8880087b6c80 R13=0000000000000020 R14=ffff888015a9b970 R15=ffff888015a9b9c0 RIP=ffffffff8180ee2b 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 00007fcdcf0268c0 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=00007fca1ba2a618 CR3=00000000159ee000 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=ffffffffffffffffffffffffffffffff XMM01=00000006000000090000564804a567f0 XMM02=ffffff0f0e0d0c0b0a09080706050403 XMM03=696e656420737365636341002f737973 XMM04=ffffffff000000000000564804a5dfd0 XMM05=00000000000000000000000000000000 XMM06=0000564804a7141000000002ffffffff XMM07=00000000000000000000000000000000 XMM08=616c702f736563697665642f7379732f XMM09=00000000000000000000000000000000 XMM10=00000000002000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000