syzkaller login: [ 30.772018] BUG: Bad rss-counter state mm:0000000083ad203a type:MM_FILEPAGES val:33 [ 30.772609] BUG: Bad rss-counter state mm:0000000083ad203a type:MM_ANONPAGES val:22 [ 30.940981] ================================================================== [ 30.941914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.942859] Read of size 8 at addr ffff888016af2c20 by task sshd/220 [ 30.943627] [ 30.943844] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.944823] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.945806] Call Trace: [ 30.946138] [ 30.946425] dump_stack_lvl+0x91/0xf0 [ 30.946926] print_report+0xcc/0x620 [ 30.947407] ? __virt_addr_valid+0x102/0x340 [ 30.947958] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.948616] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.949248] kasan_report+0xbe/0xf0 [ 30.949728] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.950350] vma_interval_tree_remove+0xc75/0xec0 [ 30.950952] vma_prepare+0xc54/0x11a0 [ 30.951425] __split_vma+0x5af/0x950 [ 30.951901] ? __pfx___split_vma+0x10/0x10 [ 30.952453] ? find_held_lock+0x2c/0x110 [ 30.952984] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.953552] ? lock_is_held_type+0x9f/0x120 [ 30.954089] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.954697] ? mtree_range_walk+0x632/0x900 [ 30.955263] ? mas_walk+0x5c7/0x7c0 [ 30.955738] do_vmi_munmap+0x1f1/0x2b0 [ 30.956243] mmap_region+0x1f9/0x2660 [ 30.956730] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.957259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.957975] ? __pfx_lock_acquire+0x10/0x10 [ 30.958531] ? __pfx_mmap_region+0x10/0x10 [ 30.959067] ? security_mmap_addr+0x7d/0xa0 [ 30.959608] ? get_unmapped_area+0x1f5/0x3f0 [ 30.960204] do_mmap+0x854/0xf00 [ 30.960644] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.961150] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.961714] ksys_mmap_pgoff+0x3af/0x500 [ 30.962223] do_syscall_64+0x3f/0x90 [ 30.962705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.963347] RIP: 0033:0x7f7af5fd7d82 [ 30.963804] 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 [ 30.965959] RSP: 002b:00007ffd8afc6728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.966868] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7af5fd7d82 [ 30.967716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7af5411000 [ 30.968577] RBP: 00007f7af5411000 R08: 0000000000000009 R09: 0000000000001000 [ 30.969427] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562fd278ec0 [ 30.970273] R13: 00007ffd8afc6740 R14: 00007ffd8afc6770 R15: 00007ffd8afc6ad0 [ 30.971132] [ 30.971424] [ 30.971644] Allocated by task 213: [ 30.972096] kasan_save_stack+0x22/0x50 [ 30.972601] kasan_set_track+0x25/0x30 [ 30.973105] __kasan_slab_alloc+0x59/0x70 [ 30.973634] kmem_cache_alloc+0x16b/0x370 [ 30.974152] vm_area_dup+0x20/0x160 [ 30.974606] __split_vma+0x170/0x950 [ 30.975078] split_vma+0xc6/0x110 [ 30.975524] mprotect_fixup+0x8d2/0xb30 [ 30.976036] do_mprotect_pkey+0x87e/0xd40 [ 30.976562] __x64_sys_mprotect+0x78/0xc0 [ 30.977105] do_syscall_64+0x3f/0x90 [ 30.977582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.978219] [ 30.978435] Freed by task 213: [ 30.978827] kasan_save_stack+0x22/0x50 [ 30.979331] kasan_set_track+0x25/0x30 [ 30.979822] kasan_save_free_info+0x2b/0x50 [ 30.980372] __kasan_slab_free+0x10a/0x190 [ 30.980912] kmem_cache_free+0x10d/0x4d0 [ 30.981427] rcu_core+0x8c8/0x2860 [ 30.981873] __do_softirq+0x1b7/0x7d4 [ 30.982347] [ 30.982565] Last potentially related work creation: [ 30.983156] kasan_save_stack+0x22/0x50 [ 30.983663] __kasan_record_aux_stack+0x8e/0xa0 [ 30.984258] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.984922] remove_vma+0x139/0x170 [ 30.985380] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.985936] do_vmi_munmap+0x1f1/0x2b0 [ 30.986454] __vm_munmap+0x138/0x3a0 [ 30.986922] __x64_sys_munmap+0x59/0x80 [ 30.987419] do_syscall_64+0x3f/0x90 [ 30.987891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.988556] [ 30.988773] The buggy address belongs to the object at ffff888016af2bc8 [ 30.988773] which belongs to the cache vm_area_struct of size 168 [ 30.990235] The buggy address is located 88 bytes inside of [ 30.990235] freed 168-byte region [ffff888016af2bc8, ffff888016af2c70) [ 30.991631] [ 30.991847] The buggy address belongs to the physical page: [ 30.992509] page:00000000317d99a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16af2 [ 30.993620] memcg:ffff88800e293901 [ 30.994050] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.994700] page_type: 0xffffffff() [ 30.995156] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.996087] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e293901 [ 30.997008] page dumped because: kasan: bad access detected [ 30.997669] [ 30.997885] Memory state around the buggy address: [ 30.998470] ffff888016af2b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.999330] ffff888016af2b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.000201] >ffff888016af2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.001057] ^ [ 31.001583] ffff888016af2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.002449] ffff888016af2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.003314] ================================================================== [ 31.004248] Disabling lock debugging due to kernel taint [ 32.891584] BUG: Bad rss-counter state mm:00000000abf5b095 type:MM_FILEPAGES val:33 [ 32.892428] BUG: Bad rss-counter state mm:00000000abf5b095 type:MM_ANONPAGES val:22 [ 33.366724] BUG: Bad rss-counter state mm:0000000097af85f3 type:MM_FILEPAGES val:33 [ 33.368080] BUG: Bad rss-counter state mm:0000000097af85f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36089' (ECDSA) to the list of known hosts. 2023/06/19 21:14:14 fuzzer started 2023/06/19 21:14:14 dialing manager at localhost:44161 2023/06/19 21:14:14 checking machine... 2023/06/19 21:14:14 checking revisions... [ 34.101002] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:14:14 testing simple program... [ 34.153869] cgroup: Unknown subsys name 'net' [ 34.217556] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:14:14 Registers: info registers vcpu 0 RAX=ffffffff8180ae86 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001b0de9f RSI=ffffffff8180ae86 RDI=ffff88800d86f568 RBP=ffff88800d86f538 RSP=ffff88800d86f498 R8 =0000000000000001 R9 =ffff88800d86f4e0 R10=0000000000038001 R11=0000000000021ee6 R12=ffff88800d86f568 R13=0000000000000000 R14=ffff88801034b680 R15=ffff88801983fd10 RIP=ffffffff813ad420 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fef3a56d900 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=00007fef39a8d000 CR3=000000000c948000 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=00000000000000000000000000000000 XMM01=432255a65cfb11b6834532ef69493280 XMM02=000000000011cf90eff9b2d0a8fce9cb XMM03=000000000011d0602c67c8bc2e329bc3 XMM04=3814c3d279bf79cd00000000000ae988 XMM05=b6d30c0606f2cec70000000000134e60 XMM06=19e9129bd510f2350000000000133cc0 XMM07=fb795ef6d65770560000000000123e68 XMM08=2c67c8bc2e329bc3000000000011d000 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888018680001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801867ff01 RSI=ffff88801867ff48 RDI=ffff88806cf09aa8 RBP=ffff88801867ff48 RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b4fb9 R12=0000000000000008 R13=ffff888018678000 R14=ffff88801867ff48 R15=ffff88806cf09a98 RIP=ffffffff811304ce 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efc71148900 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=00007efc716ff618 CR3=0000000016efc000 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