syzkaller login: [ 60.895477] BUG: Bad rss-counter state mm:000000006076991a type:MM_FILEPAGES val:33 [ 60.896731] BUG: Bad rss-counter state mm:000000006076991a type:MM_ANONPAGES val:22 [ 61.061362] ================================================================== [ 61.062493] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.063466] Read of size 8 at addr ffff888016773798 by task sshd/219 [ 61.064304] [ 61.064520] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.065384] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.066386] Call Trace: [ 61.066701] [ 61.066997] dump_stack_lvl+0x91/0xf0 [ 61.067504] print_report+0xcc/0x620 [ 61.068005] ? __virt_addr_valid+0x102/0x340 [ 61.068574] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.069208] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.069842] kasan_report+0xbe/0xf0 [ 61.070355] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.071007] vma_interval_tree_remove+0xc75/0xec0 [ 61.071625] vma_prepare+0xc54/0x11a0 [ 61.072115] __split_vma+0x5af/0x950 [ 61.072605] ? __pfx___split_vma+0x10/0x10 [ 61.073147] ? find_held_lock+0x2c/0x110 [ 61.073684] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.074289] ? lock_is_held_type+0x9f/0x120 [ 61.074851] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.075476] ? mtree_range_walk+0x632/0x900 [ 61.076047] ? mas_walk+0x5c7/0x7c0 [ 61.076545] do_vmi_munmap+0x1f1/0x2b0 [ 61.077052] mmap_region+0x1f9/0x2660 [ 61.077547] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.078079] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.078845] ? __pfx_lock_acquire+0x10/0x10 [ 61.079401] ? __pfx_mmap_region+0x10/0x10 [ 61.079955] ? security_mmap_addr+0x7d/0xa0 [ 61.080510] ? get_unmapped_area+0x1f5/0x3f0 [ 61.081084] do_mmap+0x854/0xf00 [ 61.081534] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.082048] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.082643] ksys_mmap_pgoff+0x3af/0x500 [ 61.083173] do_syscall_64+0x3f/0x90 [ 61.083671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.084345] RIP: 0033:0x7fdfa3829d82 [ 61.084814] 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 [ 61.087039] RSP: 002b:00007ffcdc2caf18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.087982] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdfa3829d82 [ 61.088858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdfa2c63000 [ 61.089728] RBP: 00007fdfa2c63000 R08: 0000000000000009 R09: 0000000000001000 [ 61.090609] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563fdd04eec0 [ 61.091477] R13: 00007ffcdc2caf30 R14: 00007ffcdc2caf60 R15: 00007ffcdc2cb2c0 [ 61.092357] [ 61.092657] [ 61.092876] Allocated by task 212: [ 61.093316] kasan_save_stack+0x22/0x50 [ 61.093832] kasan_set_track+0x25/0x30 [ 61.094359] __kasan_slab_alloc+0x59/0x70 [ 61.094895] kmem_cache_alloc+0x16b/0x370 [ 61.095424] vm_area_dup+0x20/0x160 [ 61.095889] __split_vma+0x170/0x950 [ 61.096367] split_vma+0xc6/0x110 [ 61.096820] mprotect_fixup+0x8d2/0xb30 [ 61.097332] do_mprotect_pkey+0x87e/0xd40 [ 61.097864] __x64_sys_mprotect+0x78/0xc0 [ 61.098408] do_syscall_64+0x3f/0x90 [ 61.098894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.099551] [ 61.099770] Freed by task 212: [ 61.100175] kasan_save_stack+0x22/0x50 [ 61.100687] kasan_set_track+0x25/0x30 [ 61.101195] kasan_save_free_info+0x2b/0x50 [ 61.101739] __kasan_slab_free+0x10a/0x190 [ 61.102322] kmem_cache_free+0x10d/0x4d0 [ 61.102848] rcu_core+0x8c8/0x2860 [ 61.103309] __do_softirq+0x1b7/0x7d4 [ 61.103796] [ 61.104018] Last potentially related work creation: [ 61.104616] kasan_save_stack+0x22/0x50 [ 61.105142] __kasan_record_aux_stack+0x8e/0xa0 [ 61.105726] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.106393] remove_vma+0x139/0x170 [ 61.106857] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.107427] do_vmi_munmap+0x1f1/0x2b0 [ 61.107925] __vm_munmap+0x138/0x3a0 [ 61.108401] __x64_sys_munmap+0x59/0x80 [ 61.108911] do_syscall_64+0x3f/0x90 [ 61.109396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.110053] [ 61.110279] The buggy address belongs to the object at ffff888016773740 [ 61.110279] which belongs to the cache vm_area_struct of size 168 [ 61.111795] The buggy address is located 88 bytes inside of [ 61.111795] freed 168-byte region [ffff888016773740, ffff8880167737e8) [ 61.113245] [ 61.113463] The buggy address belongs to the physical page: [ 61.114146] page:000000000a02e113 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16773 [ 61.115283] memcg:ffff88800fca1b01 [ 61.115721] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.116434] page_type: 0xffffffff() [ 61.116898] raw: 0100000000000200 ffff8880087a0c80 ffffea000040b740 000000000000000f [ 61.117839] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fca1b01 [ 61.118777] page dumped because: kasan: bad access detected [ 61.119454] [ 61.119673] Memory state around the buggy address: [ 61.120267] ffff888016773680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.121151] ffff888016773700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.122028] >ffff888016773780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.122912] ^ [ 61.123418] ffff888016773800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 61.124298] ffff888016773880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 61.125169] ================================================================== [ 61.126192] Disabling lock debugging due to kernel taint [ 63.756571] BUG: Bad rss-counter state mm:00000000b28b136e type:MM_FILEPAGES val:33 [ 63.757905] BUG: Bad rss-counter state mm:00000000b28b136e type:MM_ANONPAGES val:22 [ 64.160097] BUG: Bad rss-counter state mm:000000008c8352c2 type:MM_FILEPAGES val:33 [ 64.161284] BUG: Bad rss-counter state mm:000000008c8352c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47313' (ECDSA) to the list of known hosts. 2023/06/20 14:37:04 fuzzer started 2023/06/20 14:37:04 dialing manager at localhost:36067 2023/06/20 14:37:04 checking machine... 2023/06/20 14:37:04 checking revisions... [ 64.884415] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:37:04 testing simple program... [ 64.946579] cgroup: Unknown subsys name 'net' [ 65.043028] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:37:04 Registers: info registers vcpu 0 RAX=ffffffff8118d7fe RBX=ffffffff85d98dbc RCX=ffffffff8118d7d8 RDX=0000000000000000 RSI=ffffffff860a12ea RDI=ffffffff85d98db0 RBP=ffffffff85d98dbc RSP=ffff888008d9f8c0 R8 =ffffffff860a12ea R9 =ffff888008d9f9b8 R10=0000000000038001 R11=00000000000078fb R12=ffffffff85d98db8 R13=ffffffff85d98db0 R14=0000000000000008 R15=dffffc0000000000 RIP=ffffffff8112fca7 RFL=00000202 [-------] 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 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=00007fb88a5683ec CR3=000000000f74c000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000bd62d5de RBX=00000000c28c2217 RCX=ffff88801585ee28 RDX=0000000000000011 RSI=000000000000001c RDI=00000000709fe7b0 RBP=0000000000000000 RSP=ffff88801585eda8 R8 =000000003d73dde8 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88801585ee10 R15=0000000000000011 RIP=ffffffff82270454 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 00007fb889df6900 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=00007fb889dc0008 CR3=000000000f74c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000