syzkaller login: [ 31.031003] BUG: Bad rss-counter state mm:00000000f223ef22 type:MM_FILEPAGES val:33 [ 31.032483] BUG: Bad rss-counter state mm:00000000f223ef22 type:MM_ANONPAGES val:22 [ 31.188682] ================================================================== [ 31.189709] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.190747] Read of size 8 at addr ffff88801a15b3f8 by task sshd/221 [ 31.191789] [ 31.192043] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.193058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.194171] Call Trace: [ 31.194526] [ 31.194844] dump_stack_lvl+0x91/0xf0 [ 31.195388] print_report+0xcc/0x620 [ 31.195935] ? __virt_addr_valid+0x102/0x340 [ 31.196552] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.197249] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.197970] kasan_report+0xbe/0xf0 [ 31.198522] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.199254] vma_interval_tree_remove+0xc75/0xec0 [ 31.199950] vma_prepare+0xc54/0x11a0 [ 31.200512] __split_vma+0x5af/0x950 [ 31.201081] ? __pfx___split_vma+0x10/0x10 [ 31.201694] ? find_held_lock+0x2c/0x110 [ 31.202293] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.202954] ? lock_is_held_type+0x9f/0x120 [ 31.203591] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.204300] ? mtree_range_walk+0x632/0x900 [ 31.204962] ? mas_walk+0x5c7/0x7c0 [ 31.205518] do_vmi_munmap+0x1f1/0x2b0 [ 31.206101] mmap_region+0x1f9/0x2660 [ 31.206659] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.207250] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.208090] ? __pfx_lock_acquire+0x10/0x10 [ 31.208710] ? __pfx_mmap_region+0x10/0x10 [ 31.209338] ? security_mmap_addr+0x7d/0xa0 [ 31.209959] ? get_unmapped_area+0x1f5/0x3f0 [ 31.210594] do_mmap+0x854/0xf00 [ 31.211109] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.211682] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.212334] ksys_mmap_pgoff+0x3af/0x500 [ 31.212931] do_syscall_64+0x3f/0x90 [ 31.213489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214249] RIP: 0033:0x7f6025fc4d82 [ 31.214775] 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 [ 31.217297] RSP: 002b:00007ffcc08f35d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.218352] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6025fc4d82 [ 31.219349] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f60253fe000 [ 31.220343] RBP: 00007f60253fe000 R08: 0000000000000009 R09: 0000000000001000 [ 31.221348] R10: 0000000000000812 R11: 0000000000000206 R12: 000056038a061b20 [ 31.222329] R13: 00007ffcc08f35f0 R14: 00007ffcc08f3620 R15: 00007ffcc08f3980 [ 31.223327] [ 31.223664] [ 31.223915] Allocated by task 214: [ 31.224410] kasan_save_stack+0x22/0x50 [ 31.225007] kasan_set_track+0x25/0x30 [ 31.225590] __kasan_slab_alloc+0x59/0x70 [ 31.226212] kmem_cache_alloc+0x16b/0x370 [ 31.226816] vm_area_dup+0x20/0x160 [ 31.227346] __split_vma+0x170/0x950 [ 31.227891] split_vma+0xc6/0x110 [ 31.228401] mprotect_fixup+0x8d2/0xb30 [ 31.229000] do_mprotect_pkey+0x87e/0xd40 [ 31.229609] __x64_sys_mprotect+0x78/0xc0 [ 31.230216] do_syscall_64+0x3f/0x90 [ 31.230765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231523] [ 31.231777] Freed by task 214: [ 31.232321] kasan_save_stack+0x22/0x50 [ 31.232938] kasan_set_track+0x25/0x30 [ 31.233518] kasan_save_free_info+0x2b/0x50 [ 31.234134] __kasan_slab_free+0x10a/0x190 [ 31.234749] kmem_cache_free+0x10d/0x4d0 [ 31.235340] rcu_core+0x8c8/0x2860 [ 31.235860] __do_softirq+0x1b7/0x7d4 [ 31.236420] [ 31.236675] Last potentially related work creation: [ 31.237371] kasan_save_stack+0x22/0x50 [ 31.237955] __kasan_record_aux_stack+0x8e/0xa0 [ 31.238629] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.239391] remove_vma+0x139/0x170 [ 31.239918] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.240574] do_vmi_munmap+0x1f1/0x2b0 [ 31.241162] __vm_munmap+0x138/0x3a0 [ 31.241699] __x64_sys_munmap+0x59/0x80 [ 31.242281] do_syscall_64+0x3f/0x90 [ 31.242830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.243583] [ 31.243837] The buggy address belongs to the object at ffff88801a15b3a0 [ 31.243837] which belongs to the cache vm_area_struct of size 168 [ 31.245558] The buggy address is located 88 bytes inside of [ 31.245558] freed 168-byte region [ffff88801a15b3a0, ffff88801a15b448) [ 31.247192] [ 31.247440] The buggy address belongs to the physical page: [ 31.248205] page:00000000585d78d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a15b [ 31.249495] memcg:ffff888014163d01 [ 31.249999] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.250754] page_type: 0xffffffff() [ 31.251285] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.252365] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014163d01 [ 31.253437] page dumped because: kasan: bad access detected [ 31.254211] [ 31.254464] Memory state around the buggy address: [ 31.255154] ffff88801a15b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.256149] ffff88801a15b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.257167] >ffff88801a15b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.258146] ^ [ 31.259141] ffff88801a15b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.260127] ffff88801a15b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.261144] ================================================================== [ 31.262207] Disabling lock debugging due to kernel taint [ 33.226782] BUG: Bad rss-counter state mm:0000000059f2e616 type:MM_FILEPAGES val:33 [ 33.227591] BUG: Bad rss-counter state mm:0000000059f2e616 type:MM_ANONPAGES val:22 [ 33.740014] BUG: Bad rss-counter state mm:00000000b95ddef8 type:MM_FILEPAGES val:33 [ 33.741039] BUG: Bad rss-counter state mm:00000000b95ddef8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56264' (ECDSA) to the list of known hosts. 2023/06/20 23:51:12 fuzzer started 2023/06/20 23:51:12 dialing manager at localhost:36067 2023/06/20 23:51:12 checking machine... 2023/06/20 23:51:12 checking revisions... [ 34.497995] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:51:12 testing simple program... [ 34.553309] cgroup: Unknown subsys name 'net' [ 34.592581] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:51:11 Registers: info registers vcpu 0 RAX=ffffffff815ab150 RBX=ffff88800ca78000 RCX=0000000000000000 RDX=ffff88801606d1c0 RSI=ffffc9000068b048 RDI=ffff88801428fe30 RBP=000000007fff0000 RSP=ffff88801428fdd8 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=000000007fff0000 R13=dffffc0000000000 R14=ffff88801428fe30 R15=ffffc9000068b000 RIP=ffffffff84538a40 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 00007f44cf594900 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=00007efe76952650 CR3=000000000c700000 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=3788514ec8d618df00000000000ae988 XMM05=6cc6d6d71bdea8360000000000133298 XMM06=c291bd5c70af25b90000000000132088 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff863ddee4 RDX=0000000000000000 RSI=1ffff110039c7e8b RDI=0000000000000001 RBP=ffff88801ce3f470 RSP=ffff88801ce3f3a8 R8 =ffffffff863ddee8 R9 =ffff88801ce3f458 R10=0000000000038001 R11=0000000000091afa R12=ffff88801ce3f478 R13=ffff88801ce3f460 R14=ffff88801ce3f459 R15=ffff88801ce3f418 RIP=ffffffff81130af5 RFL=00000216 [----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 00007efe7639d900 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=00007efe76954618 CR3=000000000f034000 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