syzkaller login: [ 31.633090] BUG: Bad rss-counter state mm:00000000ca64bc40 type:MM_FILEPAGES val:33 [ 31.634148] BUG: Bad rss-counter state mm:00000000ca64bc40 type:MM_ANONPAGES val:22 [ 31.803783] ================================================================== [ 31.804739] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.805682] Read of size 8 at addr ffff88800ca66228 by task sshd/222 [ 31.806545] [ 31.806765] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.807658] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.808702] Call Trace: [ 31.809027] [ 31.809327] dump_stack_lvl+0x91/0xf0 [ 31.809831] print_report+0xcc/0x620 [ 31.810317] ? __virt_addr_valid+0x102/0x340 [ 31.810883] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.811529] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.812215] kasan_report+0xbe/0xf0 [ 31.812718] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.813353] vma_interval_tree_remove+0xc75/0xec0 [ 31.813968] vma_prepare+0xc54/0x11a0 [ 31.814454] __split_vma+0x5af/0x950 [ 31.814934] ? __pfx___split_vma+0x10/0x10 [ 31.815481] ? find_held_lock+0x2c/0x110 [ 31.816034] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.816620] ? lock_is_held_type+0x9f/0x120 [ 31.817172] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.817794] ? mtree_range_walk+0x632/0x900 [ 31.818348] ? mas_walk+0x5c7/0x7c0 [ 31.818837] do_vmi_munmap+0x1f1/0x2b0 [ 31.819335] mmap_region+0x1f9/0x2660 [ 31.819849] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.820419] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.821150] ? __pfx_lock_acquire+0x10/0x10 [ 31.821701] ? __pfx_mmap_region+0x10/0x10 [ 31.822234] ? security_mmap_addr+0x7d/0xa0 [ 31.822784] ? get_unmapped_area+0x1f5/0x3f0 [ 31.823335] do_mmap+0x854/0xf00 [ 31.823806] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.824326] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.824905] ksys_mmap_pgoff+0x3af/0x500 [ 31.825431] do_syscall_64+0x3f/0x90 [ 31.825934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.826599] RIP: 0033:0x7fdf2a7ded82 [ 31.827068] 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 [ 31.829233] RSP: 002b:00007ffc527792a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.830152] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf2a7ded82 [ 31.831017] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf29c18000 [ 31.832004] RBP: 00007fdf29c18000 R08: 0000000000000009 R09: 0000000000001000 [ 31.832962] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d4f61bec0 [ 31.833861] R13: 00007ffc527792c0 R14: 00007ffc527792f0 R15: 00007ffc52779650 [ 31.834752] [ 31.835049] [ 31.835263] Allocated by task 215: [ 31.835736] kasan_save_stack+0x22/0x50 [ 31.836257] kasan_set_track+0x25/0x30 [ 31.836768] __kasan_slab_alloc+0x59/0x70 [ 31.837294] kmem_cache_alloc+0x16b/0x370 [ 31.837826] vm_area_dup+0x20/0x160 [ 31.838284] __split_vma+0x170/0x950 [ 31.838784] split_vma+0xc6/0x110 [ 31.839230] mprotect_fixup+0x8d2/0xb30 [ 31.839760] do_mprotect_pkey+0x87e/0xd40 [ 31.840303] __x64_sys_mprotect+0x78/0xc0 [ 31.840848] do_syscall_64+0x3f/0x90 [ 31.841330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.841999] [ 31.842216] Freed by task 215: [ 31.842628] kasan_save_stack+0x22/0x50 [ 31.843130] kasan_set_track+0x25/0x30 [ 31.843653] kasan_save_free_info+0x2b/0x50 [ 31.844203] __kasan_slab_free+0x10a/0x190 [ 31.844753] kmem_cache_free+0x10d/0x4d0 [ 31.845268] rcu_core+0x8c8/0x2860 [ 31.845734] __do_softirq+0x1b7/0x7d4 [ 31.846216] [ 31.846445] Last potentially related work creation: [ 31.847040] kasan_save_stack+0x22/0x50 [ 31.847575] __kasan_record_aux_stack+0x8e/0xa0 [ 31.848164] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.848824] remove_vma+0x139/0x170 [ 31.849283] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.849860] do_vmi_munmap+0x1f1/0x2b0 [ 31.850344] __vm_munmap+0x138/0x3a0 [ 31.850825] __x64_sys_munmap+0x59/0x80 [ 31.851322] do_syscall_64+0x3f/0x90 [ 31.851826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.852532] [ 31.852752] The buggy address belongs to the object at ffff88800ca661d0 [ 31.852752] which belongs to the cache vm_area_struct of size 168 [ 31.854231] The buggy address is located 88 bytes inside of [ 31.854231] freed 168-byte region [ffff88800ca661d0, ffff88800ca66278) [ 31.855672] [ 31.855899] The buggy address belongs to the physical page: [ 31.856579] page:00000000957cbfc9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca66 [ 31.857689] memcg:ffff8880183c7301 [ 31.858116] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.858775] page_type: 0xffffffff() [ 31.859221] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.860161] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880183c7301 [ 31.861082] page dumped because: kasan: bad access detected [ 31.861764] [ 31.861980] Memory state around the buggy address: [ 31.862573] ffff88800ca66100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.863455] ffff88800ca66180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.864347] >ffff88800ca66200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.865226] ^ [ 31.865803] ffff88800ca66280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.866690] ffff88800ca66300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.867550] ================================================================== [ 31.868685] Disabling lock debugging due to kernel taint [ 34.688130] BUG: Bad rss-counter state mm:0000000043fb4975 type:MM_FILEPAGES val:33 [ 34.689139] BUG: Bad rss-counter state mm:0000000043fb4975 type:MM_ANONPAGES val:22 [ 35.204483] BUG: Bad rss-counter state mm:00000000fb14678f type:MM_FILEPAGES val:33 [ 35.205746] BUG: Bad rss-counter state mm:00000000fb14678f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26185' (ECDSA) to the list of known hosts. 2023/06/20 11:51:51 fuzzer started 2023/06/20 11:51:51 dialing manager at localhost:36067 2023/06/20 11:51:51 checking machine... 2023/06/20 11:51:51 checking revisions... [ 35.910903] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:51:52 testing simple program... [ 35.966144] cgroup: Unknown subsys name 'net' [ 36.107114] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:51:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8614be1c RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff8614be20 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000002402e R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff8880147ff838 R15=ffff88806ce09a70 RIP=ffffffff81131153 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 00007efffb885900 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=00007efffacfd040 CR3=0000000008c7a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=644e4d41fca034c600000000000ae988 XMM05=2fc3604d9e5987800000000000132ab0 XMM06=59d5b690e0af863b0000000000131968 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880069d7f58 RCX=0000000000000000 RDX=0000000000000014 RSI=00007ffc5a7744f0 RDI=0000000000000009 RBP=ffff8880069d7f48 RSP=ffff8880069d7f00 R8 =00007ffc5a774494 R9 =000000000000000c R10=1ffff11000d3aff9 R11=0000000000000000 R12=ffff8880069d7f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8363de14 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 00007faf72c6c900 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=00007faf73223618 CR3=0000000006aae000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000