syzkaller login: [ 29.567920] BUG: Bad rss-counter state mm:00000000954453f8 type:MM_FILEPAGES val:33 [ 29.569115] BUG: Bad rss-counter state mm:00000000954453f8 type:MM_ANONPAGES val:22 [ 29.740779] ================================================================== [ 29.741801] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.742826] Read of size 8 at addr ffff88800c59ec20 by task sshd/220 [ 29.743813] [ 29.744053] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.745026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.746119] Call Trace: [ 29.746474] [ 29.746788] dump_stack_lvl+0x91/0xf0 [ 29.747344] print_report+0xcc/0x620 [ 29.747900] ? __virt_addr_valid+0x102/0x340 [ 29.748521] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.749206] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.749904] kasan_report+0xbe/0xf0 [ 29.750436] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.751126] vma_interval_tree_remove+0xc75/0xec0 [ 29.751802] vma_prepare+0xc54/0x11a0 [ 29.752340] __split_vma+0x5af/0x950 [ 29.752856] ? __pfx___split_vma+0x10/0x10 [ 29.753444] ? find_held_lock+0x2c/0x110 [ 29.754024] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.754642] ? lock_is_held_type+0x9f/0x120 [ 29.755251] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.755923] ? mtree_range_walk+0x632/0x900 [ 29.756552] ? mas_walk+0x5c7/0x7c0 [ 29.757073] do_vmi_munmap+0x1f1/0x2b0 [ 29.757632] mmap_region+0x1f9/0x2660 [ 29.758172] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.758747] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.759544] ? __pfx_lock_acquire+0x10/0x10 [ 29.760160] ? __pfx_mmap_region+0x10/0x10 [ 29.760748] ? security_mmap_addr+0x7d/0xa0 [ 29.761341] ? get_unmapped_area+0x1f5/0x3f0 [ 29.761957] do_mmap+0x854/0xf00 [ 29.762435] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.762985] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.763622] ksys_mmap_pgoff+0x3af/0x500 [ 29.764200] do_syscall_64+0x3f/0x90 [ 29.764736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.765466] RIP: 0033:0x7fb28ce25d82 [ 29.765973] 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 [ 29.768403] RSP: 002b:00007ffeb5146388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.769434] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb28ce25d82 [ 29.770418] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb28c25f000 [ 29.771353] RBP: 00007fb28c25f000 R08: 0000000000000009 R09: 0000000000001000 [ 29.772301] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568cbc0bec0 [ 29.773249] R13: 00007ffeb51463a0 R14: 00007ffeb51463d0 R15: 00007ffeb5146730 [ 29.774203] [ 29.774534] [ 29.774772] Allocated by task 213: [ 29.775237] kasan_save_stack+0x22/0x50 [ 29.775746] kasan_set_track+0x25/0x30 [ 29.776240] __kasan_slab_alloc+0x59/0x70 [ 29.776770] kmem_cache_alloc+0x16b/0x370 [ 29.777287] vm_area_dup+0x20/0x160 [ 29.777742] __split_vma+0x170/0x950 [ 29.778213] split_vma+0xc6/0x110 [ 29.778650] mprotect_fixup+0x8d2/0xb30 [ 29.779146] do_mprotect_pkey+0x87e/0xd40 [ 29.779666] __x64_sys_mprotect+0x78/0xc0 [ 29.780207] do_syscall_64+0x3f/0x90 [ 29.780684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.781327] [ 29.781541] Freed by task 13: [ 29.781922] kasan_save_stack+0x22/0x50 [ 29.782425] kasan_set_track+0x25/0x30 [ 29.782922] kasan_save_free_info+0x2b/0x50 [ 29.783458] __kasan_slab_free+0x10a/0x190 [ 29.783998] kmem_cache_free+0x10d/0x4d0 [ 29.784511] rcu_core+0x8c8/0x2860 [ 29.784956] __do_softirq+0x1b7/0x7d4 [ 29.785450] [ 29.785663] Last potentially related work creation: [ 29.786249] kasan_save_stack+0x22/0x50 [ 29.786751] __kasan_record_aux_stack+0x8e/0xa0 [ 29.787326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.787980] remove_vma+0x139/0x170 [ 29.788434] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.788994] do_vmi_munmap+0x1f1/0x2b0 [ 29.789489] __vm_munmap+0x138/0x3a0 [ 29.789958] __x64_sys_munmap+0x59/0x80 [ 29.790452] do_syscall_64+0x3f/0x90 [ 29.790926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.791580] [ 29.791818] The buggy address belongs to the object at ffff88800c59ebc8 [ 29.791818] which belongs to the cache vm_area_struct of size 168 [ 29.793283] The buggy address is located 88 bytes inside of [ 29.793283] freed 168-byte region [ffff88800c59ebc8, ffff88800c59ec70) [ 29.794697] [ 29.794914] The buggy address belongs to the physical page: [ 29.795577] page:00000000dc423349 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc59e [ 29.796671] memcg:ffff8880165e0101 [ 29.797096] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.797745] page_type: 0xffffffff() [ 29.798195] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.799116] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165e0101 [ 29.800031] page dumped because: kasan: bad access detected [ 29.800696] [ 29.800912] Memory state around the buggy address: [ 29.801494] ffff88800c59eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.802353] ffff88800c59eb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.803206] >ffff88800c59ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.804069] ^ [ 29.804595] ffff88800c59ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.805449] ffff88800c59ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.806291] ================================================================== [ 29.807218] Disabling lock debugging due to kernel taint [ 31.861296] BUG: Bad rss-counter state mm:000000001f13fb97 type:MM_FILEPAGES val:33 [ 31.862413] BUG: Bad rss-counter state mm:000000001f13fb97 type:MM_ANONPAGES val:22 [ 32.340410] BUG: Bad rss-counter state mm:0000000011b3c5bf type:MM_FILEPAGES val:33 [ 32.341424] BUG: Bad rss-counter state mm:0000000011b3c5bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54409' (ECDSA) to the list of known hosts. 2023/06/20 18:08:35 fuzzer started 2023/06/20 18:08:35 dialing manager at localhost:36067 2023/06/20 18:08:35 checking machine... 2023/06/20 18:08:35 checking revisions... [ 33.080210] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:08:35 testing simple program... [ 33.124560] cgroup: Unknown subsys name 'net' [ 33.166096] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:08:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d8256 RDX=1ffff110011b3f3b RSI=1ffff110011b3f3a RDI=1ffff110011b3f3a RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff860d825a R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000010b8d R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fab0 R15=ffff888008d9f978 RIP=ffffffff811310d4 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 0000000000000000 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=00007f96dc70b0b0 CR3=0000000015a36000 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=38303a3831203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323930 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880159dd500 RCX=ffff88800844f780 RDX=ffffea00004faa40 RSI=ffff888013ea9ab0 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88800f037a38 R8 =ffff888013ea9720 R9 =0000000000000000 R10=ffffea00004faa40 R11=00000000800d000b R12=dffffc0000000000 R13=ffff88800f037a78 R14=ffff88800844f780 R15=ffff888013ea9ab0 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007f96dc153900 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=00007f96dc70a618 CR3=000000001c9fc000 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