syzkaller login: [ 31.079134] BUG: Bad rss-counter state mm:00000000a26067aa type:MM_FILEPAGES val:33 [ 31.080132] BUG: Bad rss-counter state mm:00000000a26067aa type:MM_ANONPAGES val:22 [ 31.247147] ================================================================== [ 31.248133] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.249137] Read of size 8 at addr ffff888009996ed8 by task sshd/220 [ 31.250168] [ 31.250409] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.251335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.252404] Call Trace: [ 31.252744] [ 31.253049] dump_stack_lvl+0x91/0xf0 [ 31.253608] print_report+0xcc/0x620 [ 31.254127] ? __virt_addr_valid+0x102/0x340 [ 31.254726] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255391] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256067] kasan_report+0xbe/0xf0 [ 31.256582] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257261] vma_interval_tree_remove+0xc75/0xec0 [ 31.257932] vma_prepare+0xc54/0x11a0 [ 31.258466] __split_vma+0x5af/0x950 [ 31.258984] ? __pfx___split_vma+0x10/0x10 [ 31.259566] ? find_held_lock+0x2c/0x110 [ 31.260138] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.260759] ? lock_is_held_type+0x9f/0x120 [ 31.261357] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.262052] ? mtree_range_walk+0x632/0x900 [ 31.262667] ? mas_walk+0x5c7/0x7c0 [ 31.263192] do_vmi_munmap+0x1f1/0x2b0 [ 31.263734] mmap_region+0x1f9/0x2660 [ 31.264266] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.264834] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.265644] ? __pfx_lock_acquire+0x10/0x10 [ 31.266234] ? __pfx_mmap_region+0x10/0x10 [ 31.266811] ? security_mmap_addr+0x7d/0xa0 [ 31.267398] ? get_unmapped_area+0x1f5/0x3f0 [ 31.268004] do_mmap+0x854/0xf00 [ 31.268488] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.269031] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.269658] ksys_mmap_pgoff+0x3af/0x500 [ 31.270220] do_syscall_64+0x3f/0x90 [ 31.270746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271458] RIP: 0033:0x7f7ad78ccd82 [ 31.271960] 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 [ 31.274256] RSP: 002b:00007ffedb1b73d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.275231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ad78ccd82 [ 31.276160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ad6d06000 [ 31.277073] RBP: 00007f7ad6d06000 R08: 0000000000000009 R09: 0000000000001000 [ 31.277996] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633cbfafec0 [ 31.278904] R13: 00007ffedb1b73f0 R14: 00007ffedb1b7420 R15: 00007ffedb1b7780 [ 31.279816] [ 31.280131] [ 31.280365] Allocated by task 213: [ 31.280819] kasan_save_stack+0x22/0x50 [ 31.281355] kasan_set_track+0x25/0x30 [ 31.281895] __kasan_slab_alloc+0x59/0x70 [ 31.282455] kmem_cache_alloc+0x16b/0x370 [ 31.283006] vm_area_dup+0x20/0x160 [ 31.283487] __split_vma+0x170/0x950 [ 31.283984] split_vma+0xc6/0x110 [ 31.284457] mprotect_fixup+0x8d2/0xb30 [ 31.284997] do_mprotect_pkey+0x87e/0xd40 [ 31.285560] __x64_sys_mprotect+0x78/0xc0 [ 31.286112] do_syscall_64+0x3f/0x90 [ 31.286626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287331] [ 31.287565] Freed by task 19: [ 31.287993] kasan_save_stack+0x22/0x50 [ 31.288544] kasan_set_track+0x25/0x30 [ 31.289086] kasan_save_free_info+0x2b/0x50 [ 31.289677] __kasan_slab_free+0x10a/0x190 [ 31.290257] kmem_cache_free+0x10d/0x4d0 [ 31.290878] rcu_core+0x8c8/0x2860 [ 31.291380] __do_softirq+0x1b7/0x7d4 [ 31.291909] [ 31.292147] Last potentially related work creation: [ 31.292791] kasan_save_stack+0x22/0x50 [ 31.293341] __kasan_record_aux_stack+0x8e/0xa0 [ 31.293991] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.294691] remove_vma+0x139/0x170 [ 31.295185] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.295789] do_vmi_munmap+0x1f1/0x2b0 [ 31.296318] __vm_munmap+0x138/0x3a0 [ 31.296831] __x64_sys_munmap+0x59/0x80 [ 31.297375] do_syscall_64+0x3f/0x90 [ 31.297908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298609] [ 31.298843] The buggy address belongs to the object at ffff888009996e80 [ 31.298843] which belongs to the cache vm_area_struct of size 168 [ 31.300458] The buggy address is located 88 bytes inside of [ 31.300458] freed 168-byte region [ffff888009996e80, ffff888009996f28) [ 31.301995] [ 31.302230] The buggy address belongs to the physical page: [ 31.302939] page:000000008b4b04c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9996 [ 31.304133] memcg:ffff88801bcbe401 [ 31.304596] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.305301] page_type: 0xffffffff() [ 31.305816] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.306824] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bcbe401 [ 31.307829] page dumped because: kasan: bad access detected [ 31.308558] [ 31.308796] Memory state around the buggy address: [ 31.309429] ffff888009996d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.310385] ffff888009996e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.311300] >ffff888009996e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.312178] ^ [ 31.312942] ffff888009996f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.313853] ffff888009996f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.314738] ================================================================== [ 31.315683] Disabling lock debugging due to kernel taint [ 33.972352] BUG: Bad rss-counter state mm:00000000eed26474 type:MM_FILEPAGES val:33 [ 33.973367] BUG: Bad rss-counter state mm:00000000eed26474 type:MM_ANONPAGES val:22 [ 34.412501] BUG: Bad rss-counter state mm:000000004ce7132b type:MM_FILEPAGES val:33 [ 34.413709] BUG: Bad rss-counter state mm:000000004ce7132b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51238' (ECDSA) to the list of known hosts. 2023/06/20 20:48:02 fuzzer started 2023/06/20 20:48:02 dialing manager at localhost:36067 2023/06/20 20:48:02 checking machine... 2023/06/20 20:48:02 checking revisions... [ 35.074795] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:48:02 testing simple program... [ 35.121965] cgroup: Unknown subsys name 'net' [ 35.177262] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:48:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007faf2498d8b0 RCX=0000000000000000 RDX=ffff888016fe1b40 RSI=ffffffff83636382 RDI=0000000000000007 RBP=ffff888019fe7e60 RSP=ffff888019fe7b48 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000064 R13=0000000000000064 R14=0000000000000040 R15=0000000000000000 RIP=ffffffff814c0864 RFL=00000293 [--S-A-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 00007faf24991700 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=00007f74eb8be4f0 CR3=000000000cb2a000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303037 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888018243680 RSI=ffffffff844b7c3d RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88801a09fd68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88801a09fe70 R14=ffffffffffffffff R15=1ffff11003413faf RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f508ed33900 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=00007f508ecfd008 CR3=0000000016bbe000 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