syzkaller login: [ 30.171115] BUG: Bad rss-counter state mm:0000000059cc4a72 type:MM_FILEPAGES val:33 [ 30.172870] BUG: Bad rss-counter state mm:0000000059cc4a72 type:MM_ANONPAGES val:22 [ 30.313343] ================================================================== [ 30.314260] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.315200] Read of size 8 at addr ffff88800d5f5c20 by task sshd/221 [ 30.315983] [ 30.316206] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.317250] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.318245] Call Trace: [ 30.318567] [ 30.318853] dump_stack_lvl+0x91/0xf0 [ 30.319352] print_report+0xcc/0x620 [ 30.319876] ? __virt_addr_valid+0x102/0x340 [ 30.320438] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.321053] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.321677] kasan_report+0xbe/0xf0 [ 30.322165] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.322793] vma_interval_tree_remove+0xc75/0xec0 [ 30.323410] vma_prepare+0xc54/0x11a0 [ 30.323895] __split_vma+0x5af/0x950 [ 30.324373] ? __pfx___split_vma+0x10/0x10 [ 30.324901] ? find_held_lock+0x2c/0x110 [ 30.325432] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.325996] ? lock_is_held_type+0x9f/0x120 [ 30.326544] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.327158] ? mtree_range_walk+0x632/0x900 [ 30.327734] ? mas_walk+0x5c7/0x7c0 [ 30.328213] do_vmi_munmap+0x1f1/0x2b0 [ 30.328710] mmap_region+0x1f9/0x2660 [ 30.329196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.329707] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.330438] ? __pfx_lock_acquire+0x10/0x10 [ 30.330982] ? __pfx_mmap_region+0x10/0x10 [ 30.331530] ? security_mmap_addr+0x7d/0xa0 [ 30.332071] ? get_unmapped_area+0x1f5/0x3f0 [ 30.332631] do_mmap+0x854/0xf00 [ 30.333075] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.333571] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.334146] ksys_mmap_pgoff+0x3af/0x500 [ 30.334669] do_syscall_64+0x3f/0x90 [ 30.335151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.335833] RIP: 0033:0x7f2a42aeed82 [ 30.336292] 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 [ 30.338445] RSP: 002b:00007ffc9fb55da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.339375] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a42aeed82 [ 30.340237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a41f28000 [ 30.341090] RBP: 00007f2a41f28000 R08: 0000000000000009 R09: 0000000000001000 [ 30.341937] R10: 0000000000000812 R11: 0000000000000206 R12: 00005628c3b5bec0 [ 30.342792] R13: 00007ffc9fb55dc0 R14: 00007ffc9fb55df0 R15: 00007ffc9fb56150 [ 30.343659] [ 30.343956] [ 30.344171] Allocated by task 214: [ 30.344611] kasan_save_stack+0x22/0x50 [ 30.345120] kasan_set_track+0x25/0x30 [ 30.345626] __kasan_slab_alloc+0x59/0x70 [ 30.346157] kmem_cache_alloc+0x16b/0x370 [ 30.346679] vm_area_dup+0x20/0x160 [ 30.347142] __split_vma+0x170/0x950 [ 30.347630] split_vma+0xc6/0x110 [ 30.348080] mprotect_fixup+0x8d2/0xb30 [ 30.348578] do_mprotect_pkey+0x87e/0xd40 [ 30.349095] __x64_sys_mprotect+0x78/0xc0 [ 30.349620] do_syscall_64+0x3f/0x90 [ 30.350098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.350743] [ 30.350963] Freed by task 214: [ 30.351377] kasan_save_stack+0x22/0x50 [ 30.351880] kasan_set_track+0x25/0x30 [ 30.352390] kasan_save_free_info+0x2b/0x50 [ 30.352924] __kasan_slab_free+0x10a/0x190 [ 30.353460] kmem_cache_free+0x10d/0x4d0 [ 30.353972] rcu_core+0x8c8/0x2860 [ 30.354424] __do_softirq+0x1b7/0x7d4 [ 30.354910] [ 30.355128] Last potentially related work creation: [ 30.355728] kasan_save_stack+0x22/0x50 [ 30.356228] __kasan_record_aux_stack+0x8e/0xa0 [ 30.356815] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.357462] remove_vma+0x139/0x170 [ 30.357915] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.358573] do_vmi_munmap+0x1f1/0x2b0 [ 30.359072] __vm_munmap+0x138/0x3a0 [ 30.359565] __x64_sys_munmap+0x59/0x80 [ 30.360066] do_syscall_64+0x3f/0x90 [ 30.360552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.361198] [ 30.361416] The buggy address belongs to the object at ffff88800d5f5bc8 [ 30.361416] which belongs to the cache vm_area_struct of size 168 [ 30.362916] The buggy address is located 88 bytes inside of [ 30.362916] freed 168-byte region [ffff88800d5f5bc8, ffff88800d5f5c70) [ 30.364380] [ 30.364597] The buggy address belongs to the physical page: [ 30.365273] page:00000000c9bd5d3c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5f5 [ 30.366387] memcg:ffff888018b8dc01 [ 30.366811] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.367504] page_type: 0xffffffff() [ 30.367962] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.368920] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018b8dc01 [ 30.369854] page dumped because: kasan: bad access detected [ 30.370546] [ 30.370766] Memory state around the buggy address: [ 30.371359] ffff88800d5f5b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.372233] ffff88800d5f5b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.373111] >ffff88800d5f5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.373965] ^ [ 30.374507] ffff88800d5f5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.375396] ffff88800d5f5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.376275] ================================================================== [ 30.377274] Disabling lock debugging due to kernel taint [ 32.805794] BUG: Bad rss-counter state mm:00000000b2e8d1a7 type:MM_FILEPAGES val:33 [ 32.807062] BUG: Bad rss-counter state mm:00000000b2e8d1a7 type:MM_ANONPAGES val:22 [ 33.276922] BUG: Bad rss-counter state mm:000000001d4c8d4d type:MM_FILEPAGES val:33 [ 33.278149] BUG: Bad rss-counter state mm:000000001d4c8d4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24837' (ECDSA) to the list of known hosts. 2023/06/21 10:47:47 fuzzer started 2023/06/21 10:47:47 dialing manager at localhost:36067 2023/06/21 10:47:47 checking machine... 2023/06/21 10:47:47 checking revisions... [ 33.961543] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:47:47 testing simple program... [ 34.011771] cgroup: Unknown subsys name 'net' [ 34.070222] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:47:47 Registers: info registers vcpu 0 RAX=ffff8880190d7e88 RBX=ffff88806ce09ee8 RCX=1ffff1100321afd1 RDX=ffff88800cbdb670 RSI=0000000000000008 RDI=ffff88806ce09ef8 RBP=0000000000000009 RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88800e4028d0 RIP=ffffffff8137fcd9 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 00007f9aabe66900 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=00007f9aab2d2a90 CR3=000000000cb38000 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=2037343a37343a3031203132206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a343232323520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a37343a3031203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001ebd54d RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888019b09b40 RSI=ffffffff81716bf0 RDI=ffff88800f5eaa68 RBP=00007ffe13676000 RSP=ffff888015d07de8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800f5ea9f8 R13=0000000000000000 R14=0000000000000040 R15=ffff888015f23780 RIP=ffffffff81716c06 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 00007f04b4ab1900 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=00007ffe13676000 CR3=000000001caa0000 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=000000000000000000000000000000ff XMM02=15a245e531a9865c0b355f0ae2307487 XMM03=1dec8b654949ac8b0ca46533211acff8 XMM04=4113a6c1269d22698f8883909d9212cb XMM05=000000000000000000000000000000ff XMM06=1d138b65264922690c886533211a12cb XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000