syzkaller login: [ 30.514093] BUG: Bad rss-counter state mm:00000000c61c9308 type:MM_FILEPAGES val:33 [ 30.515005] BUG: Bad rss-counter state mm:00000000c61c9308 type:MM_ANONPAGES val:22 [ 30.632137] ================================================================== [ 30.633438] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.634137] Read of size 8 at addr ffff88800c68b6b0 by task sshd/220 [ 30.634714] [ 30.634873] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.635488] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.636187] Call Trace: [ 30.636414] [ 30.636618] dump_stack_lvl+0x91/0xf0 [ 30.636976] print_report+0xcc/0x620 [ 30.637323] ? __virt_addr_valid+0x102/0x340 [ 30.637720] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.638173] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.638770] kasan_report+0xbe/0xf0 [ 30.639117] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.639563] vma_interval_tree_remove+0xc75/0xec0 [ 30.639998] vma_prepare+0xc54/0x11a0 [ 30.640346] __split_vma+0x5af/0x950 [ 30.640680] ? __pfx___split_vma+0x10/0x10 [ 30.641060] ? find_held_lock+0x2c/0x110 [ 30.641438] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.641857] ? lock_is_held_type+0x9f/0x120 [ 30.642245] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.644720] ? mtree_range_walk+0x632/0x900 [ 30.645121] ? mas_walk+0x5c7/0x7c0 [ 30.645458] do_vmi_munmap+0x1f1/0x2b0 [ 30.645813] mmap_region+0x1f9/0x2660 [ 30.646167] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.646547] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.647060] ? __pfx_lock_acquire+0x10/0x10 [ 30.647441] ? __pfx_mmap_region+0x10/0x10 [ 30.647841] ? security_mmap_addr+0x7d/0xa0 [ 30.648219] ? get_unmapped_area+0x1f5/0x3f0 [ 30.648624] do_mmap+0x854/0xf00 [ 30.648933] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.649292] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.649701] ksys_mmap_pgoff+0x3af/0x500 [ 30.650083] do_syscall_64+0x3f/0x90 [ 30.650442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.650907] RIP: 0033:0x7fee95485d82 [ 30.651242] 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 [ 30.652780] RSP: 002b:00007ffdcc65cb28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.653352] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee95485d82 [ 30.653898] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee948bf000 [ 30.654458] RBP: 00007fee948bf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.654986] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564362b00ec0 [ 30.655518] R13: 00007ffdcc65cb40 R14: 00007ffdcc65cb70 R15: 00007ffdcc65ced0 [ 30.656063] [ 30.656254] [ 30.656393] Allocated by task 213: [ 30.656674] kasan_save_stack+0x22/0x50 [ 30.656997] kasan_set_track+0x25/0x30 [ 30.657304] __kasan_slab_alloc+0x59/0x70 [ 30.657635] kmem_cache_alloc+0x16b/0x370 [ 30.657992] vm_area_dup+0x20/0x160 [ 30.658289] __split_vma+0x170/0x950 [ 30.658789] split_vma+0xc6/0x110 [ 30.659106] mprotect_fixup+0x8d2/0xb30 [ 30.659468] do_mprotect_pkey+0x87e/0xd40 [ 30.659845] __x64_sys_mprotect+0x78/0xc0 [ 30.660228] do_syscall_64+0x3f/0x90 [ 30.660578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.661042] [ 30.661199] Freed by task 13: [ 30.661480] kasan_save_stack+0x22/0x50 [ 30.661851] kasan_set_track+0x25/0x30 [ 30.662206] kasan_save_free_info+0x2b/0x50 [ 30.662718] __kasan_slab_free+0x10a/0x190 [ 30.663096] kmem_cache_free+0x10d/0x4d0 [ 30.663460] rcu_core+0x8c8/0x2860 [ 30.663789] __do_softirq+0x1b7/0x7d4 [ 30.664207] [ 30.664368] Last potentially related work creation: [ 30.664801] kasan_save_stack+0x22/0x50 [ 30.665174] __kasan_record_aux_stack+0x8e/0xa0 [ 30.665593] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.666191] remove_vma+0x139/0x170 [ 30.666536] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.666902] do_vmi_munmap+0x1f1/0x2b0 [ 30.667217] __vm_munmap+0x138/0x3a0 [ 30.667517] __x64_sys_munmap+0x59/0x80 [ 30.667832] do_syscall_64+0x3f/0x90 [ 30.668138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.668542] [ 30.668680] The buggy address belongs to the object at ffff88800c68b658 [ 30.668680] which belongs to the cache vm_area_struct of size 168 [ 30.669617] The buggy address is located 88 bytes inside of [ 30.669617] freed 168-byte region [ffff88800c68b658, ffff88800c68b700) [ 30.670599] [ 30.670744] The buggy address belongs to the physical page: [ 30.671180] page:000000002067b7bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc68b [ 30.671862] memcg:ffff88800ea36801 [ 30.672134] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.672572] page_type: 0xffffffff() [ 30.672867] raw: 0100000000000200 ffff88800879fc80 ffffea00003b7140 dead000000000005 [ 30.673452] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea36801 [ 30.674024] page dumped because: kasan: bad access detected [ 30.674454] [ 30.674592] Memory state around the buggy address: [ 30.674965] ffff88800c68b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.675503] ffff88800c68b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.676036] >ffff88800c68b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.676588] ^ [ 30.676965] ffff88800c68b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.677504] ffff88800c68b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.678069] ================================================================== [ 30.679077] Disabling lock debugging due to kernel taint [ 33.512436] BUG: Bad rss-counter state mm:0000000001d6f78d type:MM_FILEPAGES val:33 [ 33.514784] BUG: Bad rss-counter state mm:0000000001d6f78d type:MM_ANONPAGES val:22 [ 34.735188] BUG: Bad rss-counter state mm:00000000ecff7934 type:MM_FILEPAGES val:33 [ 34.735853] BUG: Bad rss-counter state mm:00000000ecff7934 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22335' (ECDSA) to the list of known hosts. 2023/06/20 10:07:50 fuzzer started 2023/06/20 10:07:50 dialing manager at localhost:44161 2023/06/20 10:07:50 checking machine... 2023/06/20 10:07:50 checking revisions... [ 35.642618] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:07:50 testing simple program... [ 35.689404] cgroup: Unknown subsys name 'net' [ 35.774869] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:07:50 Registers: info registers vcpu 0 RAX=0000607f92e13450 RBX=0000000000000001 RCX=0000000000000088 RDX=1ffff11001358c19 RSI=1ffffffff0ba7a02 RDI=ffff888009ac60c8 RBP=ffff888009ac6000 RSP=ffff888017e27aa0 R8 =0000000000000000 R9 =fffff940000d1d40 R10=ffffea000068ea07 R11=0000000000000000 R12=ffff88800f01c000 R13=0000000000000001 R14=ffff888009ac6000 R15=ffffea000068ea00 RIP=ffffffff8182ddff RFL=00000206 [-----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 00007faaaf411900 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=00007faaaf411bd0 CR3=000000001ab80000 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=2039343a37303a3031203032206e754a XMM01=5d3335383533372e34332020205b203a XMM02=415f4d4d3a6570797420343339376666 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a37303a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00000000ffffffff RCX=0000000000000100 RDX=ffff888008d751c0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88806cf09eb8 RSP=ffff88806cf09e58 R8 =0000000000000001 R9 =ffffed100d9e13b3 R10=0000000000000003 R11=0000000000000000 R12=ffff88806cf293c0 R13=dffffc0000000000 R14=fffffbfff0a81e40 R15=0000000000000000 RIP=ffffffff814c0384 RFL=00000097 [--S-APC] 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=000056525b9224d0 CR3=000000001020e000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000