syzkaller login: [ 31.137373] BUG: Bad rss-counter state mm:00000000551b53d2 type:MM_FILEPAGES val:33 [ 31.139545] BUG: Bad rss-counter state mm:00000000551b53d2 type:MM_ANONPAGES val:22 [ 31.298061] ================================================================== [ 31.299189] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.300392] Read of size 8 at addr ffff88800c98a6b0 by task sshd/219 [ 31.301438] [ 31.301668] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.302582] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.303611] Call Trace: [ 31.303946] [ 31.304246] dump_stack_lvl+0x91/0xf0 [ 31.304759] print_report+0xcc/0x620 [ 31.305262] ? __virt_addr_valid+0x102/0x340 [ 31.305825] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.306488] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.307123] kasan_report+0xbe/0xf0 [ 31.307618] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.308252] vma_interval_tree_remove+0xc75/0xec0 [ 31.308866] vma_prepare+0xc54/0x11a0 [ 31.309351] __split_vma+0x5af/0x950 [ 31.309833] ? __pfx___split_vma+0x10/0x10 [ 31.310402] ? find_held_lock+0x2c/0x110 [ 31.310936] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.311522] ? lock_is_held_type+0x9f/0x120 [ 31.312080] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.312700] ? mtree_range_walk+0x632/0x900 [ 31.313267] ? mas_walk+0x5c7/0x7c0 [ 31.313755] do_vmi_munmap+0x1f1/0x2b0 [ 31.314285] mmap_region+0x1f9/0x2660 [ 31.314781] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.315318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.316053] ? __pfx_lock_acquire+0x10/0x10 [ 31.316597] ? __pfx_mmap_region+0x10/0x10 [ 31.317146] ? security_mmap_addr+0x7d/0xa0 [ 31.317690] ? get_unmapped_area+0x1f5/0x3f0 [ 31.318272] do_mmap+0x854/0xf00 [ 31.318733] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.319241] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.319820] ksys_mmap_pgoff+0x3af/0x500 [ 31.320349] do_syscall_64+0x3f/0x90 [ 31.320841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.321501] RIP: 0033:0x7fcca3463d82 [ 31.321967] 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 [ 31.324178] RSP: 002b:00007ffeaa306cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.325106] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcca3463d82 [ 31.325983] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcca289d000 [ 31.326869] RBP: 00007fcca289d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.327742] R10: 0000000000000812 R11: 0000000000000206 R12: 000056140ec40d90 [ 31.328619] R13: 00007ffeaa306d10 R14: 00007ffeaa306d40 R15: 00007ffeaa3070a0 [ 31.329512] [ 31.329813] [ 31.330037] Allocated by task 212: [ 31.330479] kasan_save_stack+0x22/0x50 [ 31.331005] kasan_set_track+0x25/0x30 [ 31.331510] __kasan_slab_alloc+0x59/0x70 [ 31.332051] kmem_cache_alloc+0x16b/0x370 [ 31.332585] vm_area_dup+0x20/0x160 [ 31.333051] __split_vma+0x170/0x950 [ 31.333528] split_vma+0xc6/0x110 [ 31.333982] mprotect_fixup+0x8d2/0xb30 [ 31.334518] do_mprotect_pkey+0x87e/0xd40 [ 31.335055] __x64_sys_mprotect+0x78/0xc0 [ 31.335587] do_syscall_64+0x3f/0x90 [ 31.336076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.336738] [ 31.336962] Freed by task 212: [ 31.337373] kasan_save_stack+0x22/0x50 [ 31.337889] kasan_set_track+0x25/0x30 [ 31.338403] kasan_save_free_info+0x2b/0x50 [ 31.338949] __kasan_slab_free+0x10a/0x190 [ 31.339501] kmem_cache_free+0x10d/0x4d0 [ 31.340021] rcu_core+0x8c8/0x2860 [ 31.340487] __do_softirq+0x1b7/0x7d4 [ 31.340972] [ 31.341196] Last potentially related work creation: [ 31.341857] kasan_save_stack+0x22/0x50 [ 31.342402] __kasan_record_aux_stack+0x8e/0xa0 [ 31.342986] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.343649] remove_vma+0x139/0x170 [ 31.344113] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.344691] do_vmi_munmap+0x1f1/0x2b0 [ 31.345188] __vm_munmap+0x138/0x3a0 [ 31.345670] __x64_sys_munmap+0x59/0x80 [ 31.346187] do_syscall_64+0x3f/0x90 [ 31.346673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.347330] [ 31.347549] The buggy address belongs to the object at ffff88800c98a658 [ 31.347549] which belongs to the cache vm_area_struct of size 168 [ 31.349054] The buggy address is located 88 bytes inside of [ 31.349054] freed 168-byte region [ffff88800c98a658, ffff88800c98a700) [ 31.350504] [ 31.350725] The buggy address belongs to the physical page: [ 31.351405] page:00000000e288ade3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc98a [ 31.352524] memcg:ffff8880097b5501 [ 31.352963] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.353628] page_type: 0xffffffff() [ 31.354106] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.355052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097b5501 [ 31.355982] page dumped because: kasan: bad access detected [ 31.356660] [ 31.356882] Memory state around the buggy address: [ 31.357488] ffff88800c98a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.358384] ffff88800c98a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.359263] >ffff88800c98a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.360157] ^ [ 31.360770] ffff88800c98a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.361663] ffff88800c98a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.362551] ================================================================== [ 31.363695] Disabling lock debugging due to kernel taint [ 33.934713] BUG: Bad rss-counter state mm:00000000c2eef495 type:MM_FILEPAGES val:33 [ 33.935720] BUG: Bad rss-counter state mm:00000000c2eef495 type:MM_ANONPAGES val:22 [ 34.397389] BUG: Bad rss-counter state mm:00000000b2497841 type:MM_FILEPAGES val:33 [ 34.398515] BUG: Bad rss-counter state mm:00000000b2497841 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7297' (ECDSA) to the list of known hosts. 2023/06/20 04:43:00 fuzzer started 2023/06/20 04:43:00 dialing manager at localhost:44161 2023/06/20 04:43:00 checking machine... 2023/06/20 04:43:00 checking revisions... [ 35.092689] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:43:00 testing simple program... [ 35.147907] cgroup: Unknown subsys name 'net' [ 35.195873] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:42:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8136aba0 RSP=ffff88806ce09e10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff85616740 R13=0000000000000246 R14=0000000000000200 R15=ffff88806ce3a2d2 RIP=ffffffff8135b910 RFL=00000016 [----AP-] 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 00007f48c3257700 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=00007f25061ba0b0 CR3=000000000fd06000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732030303a3334 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383631 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f95d724fc30 CR3=000000000fd06000 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=2030303a33343a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a32343a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000