syzkaller login: [ 32.225334] BUG: Bad rss-counter state mm:000000009b51f5dd type:MM_FILEPAGES val:33 [ 32.226340] BUG: Bad rss-counter state mm:000000009b51f5dd type:MM_ANONPAGES val:22 [ 32.392980] ================================================================== [ 32.393951] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.395015] Read of size 8 at addr ffff88801a2a9df0 by task sshd/220 [ 32.395906] [ 32.396119] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.397199] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.398355] Call Trace: [ 32.398726] [ 32.399060] dump_stack_lvl+0x91/0xf0 [ 32.399633] print_report+0xcc/0x620 [ 32.400196] ? __virt_addr_valid+0x102/0x340 [ 32.400856] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.401579] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.402300] kasan_report+0xbe/0xf0 [ 32.402858] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.403606] vma_interval_tree_remove+0xc75/0xec0 [ 32.404330] vma_prepare+0xc54/0x11a0 [ 32.404916] __split_vma+0x5af/0x950 [ 32.405482] ? __pfx___split_vma+0x10/0x10 [ 32.406120] ? find_held_lock+0x2c/0x110 [ 32.406749] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.407433] ? lock_is_held_type+0x9f/0x120 [ 32.408080] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.408810] ? mtree_range_walk+0x632/0x900 [ 32.409346] ? mas_walk+0x5c7/0x7c0 [ 32.409811] do_vmi_munmap+0x1f1/0x2b0 [ 32.410289] mmap_region+0x1f9/0x2660 [ 32.410767] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.411265] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.411963] ? __pfx_lock_acquire+0x10/0x10 [ 32.412491] ? __pfx_mmap_region+0x10/0x10 [ 32.413014] ? security_mmap_addr+0x7d/0xa0 [ 32.413530] ? get_unmapped_area+0x1f5/0x3f0 [ 32.414069] do_mmap+0x854/0xf00 [ 32.414497] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.414980] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.415530] ksys_mmap_pgoff+0x3af/0x500 [ 32.416038] do_syscall_64+0x3f/0x90 [ 32.416510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.417148] RIP: 0033:0x7f2e02ec0d82 [ 32.417599] 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 [ 32.419659] RSP: 002b:00007ffc3411d128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.420566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e02ec0d82 [ 32.421390] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e022fa000 [ 32.422214] RBP: 00007f2e022fa000 R08: 0000000000000009 R09: 0000000000001000 [ 32.423037] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a176f17ec0 [ 32.423857] R13: 00007ffc3411d140 R14: 00007ffc3411d170 R15: 00007ffc3411d4d0 [ 32.424695] [ 32.424981] [ 32.425191] Allocated by task 213: [ 32.425606] kasan_save_stack+0x22/0x50 [ 32.426106] kasan_set_track+0x25/0x30 [ 32.426581] __kasan_slab_alloc+0x59/0x70 [ 32.427099] kmem_cache_alloc+0x16b/0x370 [ 32.427599] vm_area_dup+0x20/0x160 [ 32.428038] __split_vma+0x170/0x950 [ 32.428504] split_vma+0xc6/0x110 [ 32.428937] mprotect_fixup+0x8d2/0xb30 [ 32.429425] do_mprotect_pkey+0x87e/0xd40 [ 32.429932] __x64_sys_mprotect+0x78/0xc0 [ 32.430442] do_syscall_64+0x3f/0x90 [ 32.430902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.431529] [ 32.431739] Freed by task 19: [ 32.432112] kasan_save_stack+0x22/0x50 [ 32.432603] kasan_set_track+0x25/0x30 [ 32.433088] kasan_save_free_info+0x2b/0x50 [ 32.433598] __kasan_slab_free+0x10a/0x190 [ 32.434117] kmem_cache_free+0x10d/0x4d0 [ 32.434609] rcu_core+0x8c8/0x2860 [ 32.435042] __do_softirq+0x1b7/0x7d4 [ 32.435503] [ 32.435713] Last potentially related work creation: [ 32.436276] kasan_save_stack+0x22/0x50 [ 32.436764] __kasan_record_aux_stack+0x8e/0xa0 [ 32.437319] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.437943] remove_vma+0x139/0x170 [ 32.438379] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.438916] do_vmi_munmap+0x1f1/0x2b0 [ 32.439384] __vm_munmap+0x138/0x3a0 [ 32.439833] __x64_sys_munmap+0x59/0x80 [ 32.440312] do_syscall_64+0x3f/0x90 [ 32.440780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.441397] [ 32.441606] The buggy address belongs to the object at ffff88801a2a9d98 [ 32.441606] which belongs to the cache vm_area_struct of size 168 [ 32.443037] The buggy address is located 88 bytes inside of [ 32.443037] freed 168-byte region [ffff88801a2a9d98, ffff88801a2a9e40) [ 32.444392] [ 32.444605] The buggy address belongs to the physical page: [ 32.445247] page:0000000035298983 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2a9 [ 32.446306] memcg:ffff8880180f5301 [ 32.446719] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.447354] page_type: 0xffffffff() [ 32.447790] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.448689] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880180f5301 [ 32.449563] page dumped because: kasan: bad access detected [ 32.450202] [ 32.450412] Memory state around the buggy address: [ 32.450981] ffff88801a2a9c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.451802] ffff88801a2a9d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.452640] >ffff88801a2a9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.453455] ^ [ 32.454233] ffff88801a2a9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.455055] ffff88801a2a9e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.455874] ================================================================== [ 32.457183] Disabling lock debugging due to kernel taint [ 34.677153] BUG: Bad rss-counter state mm:00000000931b8818 type:MM_FILEPAGES val:33 [ 34.678094] BUG: Bad rss-counter state mm:00000000931b8818 type:MM_ANONPAGES val:22 [ 35.206442] BUG: Bad rss-counter state mm:00000000e00369e7 type:MM_FILEPAGES val:33 [ 35.207610] BUG: Bad rss-counter state mm:00000000e00369e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62576' (ECDSA) to the list of known hosts. 2023/06/19 12:24:23 fuzzer started 2023/06/19 12:24:23 dialing manager at localhost:44161 2023/06/19 12:24:23 checking machine... 2023/06/19 12:24:23 checking revisions... [ 35.845817] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:24:23 testing simple program... [ 35.892763] cgroup: Unknown subsys name 'net' [ 35.970202] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:24:21 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800f9ffe20 RCX=0000000080000000 RDX=ffff888016bf0000 RSI=ffffffff8449fc07 RDI=ffff88800f9ffe30 RBP=ffff88800f11220c RSP=ffff88800f9ffd88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800f013488 R13=ffffed1001f3ffcb R14=ffff88800c71201c R15=ffff88800f9ffe59 RIP=ffffffff814c07f1 RFL=00000282 [--S----] 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 00007f16834db900 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=00007f168387831c CR3=000000001bf4a000 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=0000000000000000 RBX=ffff88806cf09b30 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88806cf09a98 RBP=ffff888008d751c0 RSP=ffff88806cf09a40 R8 =0000000000000004 R9 =0000000000000000 R10=ffff88806cf09a98 R11=0000000000000000 R12=0000000000000000 R13=ffff88806cf09ac0 R14=ffff888008d751c0 R15=ffff88806cf09a98 RIP=ffffffff8450d41a RFL=00000247 [---Z-PC] 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=00007fb9fba00a60 CR3=000000001583c000 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=2032323a34323a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a34323a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000