syzkaller login: [ 35.159603] BUG: Bad rss-counter state mm:0000000004f46587 type:MM_FILEPAGES val:33 [ 35.161573] BUG: Bad rss-counter state mm:0000000004f46587 type:MM_ANONPAGES val:22 [ 35.325568] ================================================================== [ 35.326478] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.327421] Read of size 8 at addr ffff88800d641798 by task sshd/220 [ 35.328191] [ 35.328568] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.329433] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.330403] Call Trace: [ 35.330754] [ 35.331040] dump_stack_lvl+0x91/0xf0 [ 35.331535] print_report+0xcc/0x620 [ 35.332020] ? __virt_addr_valid+0x102/0x340 [ 35.332597] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.333222] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.333835] kasan_report+0xbe/0xf0 [ 35.334310] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.334933] vma_interval_tree_remove+0xc75/0xec0 [ 35.335536] vma_prepare+0xc54/0x11a0 [ 35.336019] __split_vma+0x5af/0x950 [ 35.336501] ? __pfx___split_vma+0x10/0x10 [ 35.337024] ? find_held_lock+0x2c/0x110 [ 35.337551] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.338119] ? lock_is_held_type+0x9f/0x120 [ 35.338652] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.339258] ? mtree_range_walk+0x632/0x900 [ 35.339807] ? mas_walk+0x5c7/0x7c0 [ 35.340289] do_vmi_munmap+0x1f1/0x2b0 [ 35.340779] mmap_region+0x1f9/0x2660 [ 35.341264] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.341775] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.342488] ? __pfx_lock_acquire+0x10/0x10 [ 35.343016] ? __pfx_mmap_region+0x10/0x10 [ 35.343546] ? security_mmap_addr+0x7d/0xa0 [ 35.344076] ? get_unmapped_area+0x1f5/0x3f0 [ 35.344647] do_mmap+0x854/0xf00 [ 35.345085] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.345582] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.346145] ksys_mmap_pgoff+0x3af/0x500 [ 35.346651] do_syscall_64+0x3f/0x90 [ 35.347131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.347779] RIP: 0033:0x7f0ce3272d82 [ 35.348244] 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 [ 35.350372] RSP: 002b:00007ffed8e89268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.351278] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ce3272d82 [ 35.352166] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ce26ac000 [ 35.353019] RBP: 00007f0ce26ac000 R08: 0000000000000009 R09: 0000000000001000 [ 35.353865] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f998e41d90 [ 35.354704] R13: 00007ffed8e89280 R14: 00007ffed8e892b0 R15: 00007ffed8e89610 [ 35.355552] [ 35.355841] [ 35.356053] Allocated by task 213: [ 35.356508] kasan_save_stack+0x22/0x50 [ 35.357010] kasan_set_track+0x25/0x30 [ 35.357507] __kasan_slab_alloc+0x59/0x70 [ 35.358035] kmem_cache_alloc+0x16b/0x370 [ 35.358554] vm_area_dup+0x20/0x160 [ 35.359020] __split_vma+0x170/0x950 [ 35.359487] split_vma+0xc6/0x110 [ 35.359933] mprotect_fixup+0x8d2/0xb30 [ 35.360451] do_mprotect_pkey+0x87e/0xd40 [ 35.360977] __x64_sys_mprotect+0x78/0xc0 [ 35.361502] do_syscall_64+0x3f/0x90 [ 35.361974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.362638] [ 35.362853] Freed by task 19: [ 35.363244] kasan_save_stack+0x22/0x50 [ 35.363745] kasan_set_track+0x25/0x30 [ 35.364257] kasan_save_free_info+0x2b/0x50 [ 35.364785] __kasan_slab_free+0x10a/0x190 [ 35.365313] kmem_cache_free+0x10d/0x4d0 [ 35.365822] rcu_core+0x8c8/0x2860 [ 35.366267] __do_softirq+0x1b7/0x7d4 [ 35.366749] [ 35.366962] Last potentially related work creation: [ 35.367562] kasan_save_stack+0x22/0x50 [ 35.368064] __kasan_record_aux_stack+0x8e/0xa0 [ 35.368644] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.369287] remove_vma+0x139/0x170 [ 35.369735] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.370346] do_vmi_munmap+0x1f1/0x2b0 [ 35.370838] __vm_munmap+0x138/0x3a0 [ 35.371307] __x64_sys_munmap+0x59/0x80 [ 35.371805] do_syscall_64+0x3f/0x90 [ 35.372300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.372944] [ 35.373158] The buggy address belongs to the object at ffff88800d641740 [ 35.373158] which belongs to the cache vm_area_struct of size 168 [ 35.374635] The buggy address is located 88 bytes inside of [ 35.374635] freed 168-byte region [ffff88800d641740, ffff88800d6417e8) [ 35.376036] [ 35.376260] The buggy address belongs to the physical page: [ 35.376921] page:000000002e08c12a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd641 [ 35.378000] memcg:ffff88800e02c701 [ 35.378426] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.379064] page_type: 0xffffffff() [ 35.379518] raw: 0100000000000200 ffff8880087a0c80 ffffea0000349fc0 dead000000000004 [ 35.380441] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e02c701 [ 35.381349] page dumped because: kasan: bad access detected [ 35.382009] [ 35.382224] Memory state around the buggy address: [ 35.382806] ffff88800d641680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.383664] ffff88800d641700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.384539] >ffff88800d641780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.385388] ^ [ 35.385877] ffff88800d641800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 35.386740] ffff88800d641880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 35.387589] ================================================================== [ 35.388516] Disabling lock debugging due to kernel taint [ 37.333003] BUG: Bad rss-counter state mm:00000000fd15a918 type:MM_FILEPAGES val:33 [ 37.333872] BUG: Bad rss-counter state mm:00000000fd15a918 type:MM_ANONPAGES val:22 [ 37.877745] BUG: Bad rss-counter state mm:0000000043942acf type:MM_FILEPAGES val:33 [ 37.878946] BUG: Bad rss-counter state mm:0000000043942acf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14634' (ECDSA) to the list of known hosts. 2023/06/20 11:48:03 fuzzer started 2023/06/20 11:48:03 dialing manager at localhost:36067 2023/06/20 11:48:03 checking machine... 2023/06/20 11:48:03 checking revisions... [ 38.521733] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:48:03 testing simple program... [ 38.569099] cgroup: Unknown subsys name 'net' [ 38.614657] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:48:02 Registers: info registers vcpu 0 RAX=0000000062d9aa2d RBX=000000004ddca7d3 RCX=ffff88800f7a7a3c RDX=000000000000000f RSI=000000000000000f RDI=00000000b39308bd RBP=0000000000000000 RSP=ffff88800f7a7998 R8 =0000000065b660ea R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800f7a7a00 R15=000000000000000f RIP=ffffffff82270494 RFL=00000a86 [-OS--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 00007f1445c75900 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=00007f144622c618 CR3=000000000e1d0000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f102c65c020 CR3=000000000dbf6000 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=834a2e36e4e8d399914fa08bd5ec2977 XMM02=ec2efd57dc4c00df000000000011b5b8 XMM03=fe520bb3d424f4e4000000000011b688 XMM04=dff52169181a99c200000000000ae988 XMM05=19e9129bd510f23500000000001313e8 XMM06=828b1370b61f968c00000000001305c0 XMM07=e042d86d42eb936e0000000000121ad0 XMM08=fe520bb3d424f4e4000000000011b688 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000