syzkaller login: [ 36.620746] BUG: Bad rss-counter state mm:0000000097569252 type:MM_FILEPAGES val:33 [ 36.621991] BUG: Bad rss-counter state mm:0000000097569252 type:MM_ANONPAGES val:22 [ 36.765010] ================================================================== [ 36.765918] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.766863] Read of size 8 at addr ffff888016be4df0 by task sshd/220 [ 36.767735] [ 36.767968] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.768828] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.769804] Call Trace: [ 36.770116] [ 36.770396] dump_stack_lvl+0x91/0xf0 [ 36.770908] print_report+0xcc/0x620 [ 36.771403] ? __virt_addr_valid+0x102/0x340 [ 36.771966] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.772582] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.773194] kasan_report+0xbe/0xf0 [ 36.773671] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.774289] vma_interval_tree_remove+0xc75/0xec0 [ 36.774911] vma_prepare+0xc54/0x11a0 [ 36.775399] __split_vma+0x5af/0x950 [ 36.775876] ? __pfx___split_vma+0x10/0x10 [ 36.776401] ? find_held_lock+0x2c/0x110 [ 36.776920] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.777485] ? lock_is_held_type+0x9f/0x120 [ 36.778028] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.778636] ? mtree_range_walk+0x632/0x900 [ 36.779197] ? mas_walk+0x5c7/0x7c0 [ 36.779676] do_vmi_munmap+0x1f1/0x2b0 [ 36.780169] mmap_region+0x1f9/0x2660 [ 36.780653] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.781171] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.781878] ? __pfx_lock_acquire+0x10/0x10 [ 36.782412] ? __pfx_mmap_region+0x10/0x10 [ 36.782957] ? security_mmap_addr+0x7d/0xa0 [ 36.783486] ? get_unmapped_area+0x1f5/0x3f0 [ 36.784043] do_mmap+0x854/0xf00 [ 36.784490] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.784985] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.785546] ksys_mmap_pgoff+0x3af/0x500 [ 36.786051] do_syscall_64+0x3f/0x90 [ 36.786529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.787185] RIP: 0033:0x7ff6e448ad82 [ 36.787643] 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 [ 36.789759] RSP: 002b:00007ffea68d9cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.790675] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6e448ad82 [ 36.791532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff6e38c4000 [ 36.792375] RBP: 00007ff6e38c4000 R08: 0000000000000009 R09: 0000000000001000 [ 36.793222] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d544d9b20 [ 36.794086] R13: 00007ffea68d9cd0 R14: 00007ffea68d9d00 R15: 00007ffea68da060 [ 36.794953] [ 36.795246] [ 36.795463] Allocated by task 213: [ 36.795890] kasan_save_stack+0x22/0x50 [ 36.796392] kasan_set_track+0x25/0x30 [ 36.796886] __kasan_slab_alloc+0x59/0x70 [ 36.797407] kmem_cache_alloc+0x16b/0x370 [ 36.797923] vm_area_dup+0x20/0x160 [ 36.798378] __split_vma+0x170/0x950 [ 36.798845] split_vma+0xc6/0x110 [ 36.799314] mprotect_fixup+0x8d2/0xb30 [ 36.799816] do_mprotect_pkey+0x87e/0xd40 [ 36.800332] __x64_sys_mprotect+0x78/0xc0 [ 36.800850] do_syscall_64+0x3f/0x90 [ 36.801332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.801971] [ 36.802187] Freed by task 213: [ 36.802577] kasan_save_stack+0x22/0x50 [ 36.803099] kasan_set_track+0x25/0x30 [ 36.803594] kasan_save_free_info+0x2b/0x50 [ 36.804129] __kasan_slab_free+0x10a/0x190 [ 36.804664] kmem_cache_free+0x10d/0x4d0 [ 36.805169] rcu_core+0x8c8/0x2860 [ 36.805615] __do_softirq+0x1b7/0x7d4 [ 36.806088] [ 36.806305] Last potentially related work creation: [ 36.806894] kasan_save_stack+0x22/0x50 [ 36.807400] __kasan_record_aux_stack+0x8e/0xa0 [ 36.807969] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.808613] remove_vma+0x139/0x170 [ 36.809066] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.809619] do_vmi_munmap+0x1f1/0x2b0 [ 36.810103] __vm_munmap+0x138/0x3a0 [ 36.810575] __x64_sys_munmap+0x59/0x80 [ 36.811090] do_syscall_64+0x3f/0x90 [ 36.811560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.812203] [ 36.812421] The buggy address belongs to the object at ffff888016be4d98 [ 36.812421] which belongs to the cache vm_area_struct of size 168 [ 36.813879] The buggy address is located 88 bytes inside of [ 36.813879] freed 168-byte region [ffff888016be4d98, ffff888016be4e40) [ 36.815289] [ 36.815507] The buggy address belongs to the physical page: [ 36.816161] page:00000000bc61baee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16be4 [ 36.817257] memcg:ffff888014573d01 [ 36.817683] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.818333] page_type: 0xffffffff() [ 36.818786] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.819732] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014573d01 [ 36.820652] page dumped because: kasan: bad access detected [ 36.821311] [ 36.821530] Memory state around the buggy address: [ 36.822118] ffff888016be4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.822995] ffff888016be4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.823877] >ffff888016be4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.824722] ^ [ 36.825528] ffff888016be4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.826394] ffff888016be4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.827254] ================================================================== [ 36.828217] Disabling lock debugging due to kernel taint [ 38.348514] BUG: Bad rss-counter state mm:00000000ab41f952 type:MM_FILEPAGES val:33 [ 38.350309] BUG: Bad rss-counter state mm:00000000ab41f952 type:MM_ANONPAGES val:22 [ 38.807754] BUG: Bad rss-counter state mm:000000005d81da3a type:MM_FILEPAGES val:33 [ 38.808757] BUG: Bad rss-counter state mm:000000005d81da3a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11513' (ECDSA) to the list of known hosts. 2023/06/19 19:06:29 fuzzer started 2023/06/19 19:06:29 dialing manager at localhost:44161 2023/06/19 19:06:30 checking machine... 2023/06/19 19:06:30 checking revisions... [ 39.508464] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:06:30 testing simple program... [ 39.560147] cgroup: Unknown subsys name 'net' [ 39.614728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:06:24 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff85dfca10 RCX=ffffffff8180c521 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfca0c RSP=ffff88806ce099e0 R8 =ffffffff86137508 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca18 R13=ffffffff85dfc9fc R14=ffffffff85dfca08 R15=dffffc0000000000 RIP=ffffffff8112fc8a RFL=00000206 [-----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=00007ffc53aad528 CR3=0000000005482000 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=00007f861bbaa5100000559628c3b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000c RBX=0000000000000000 RCX=00007ffd0900cba8 RDX=ffff888016839b40 RSI=ffffffff8363614a RDI=0000000000000007 RBP=00007ffd0900cba8 RSP=ffff88800edf7b10 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000b5500000b55 R12=000000000000000c R13=000000000000000c R14=ffff88800edf7bb8 R15=00007ffd0900cb84 RIP=ffffffff8450648b RFL=00040293 [--S-A-C] 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 00007fbfbefdd900 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=00007fbfbf594618 CR3=00000000168f8000 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