syzkaller login: [ 35.797797] BUG: Bad rss-counter state mm:0000000009c97018 type:MM_FILEPAGES val:33 [ 35.798833] BUG: Bad rss-counter state mm:0000000009c97018 type:MM_ANONPAGES val:22 [ 35.961591] ================================================================== [ 35.962715] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.963914] Read of size 8 at addr ffff88800dc4ca50 by task sshd/218 [ 35.964854] [ 35.965087] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.965961] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.967007] Call Trace: [ 35.967335] [ 35.967627] dump_stack_lvl+0x91/0xf0 [ 35.968148] print_report+0xcc/0x620 [ 35.968649] ? __virt_addr_valid+0x102/0x340 [ 35.969225] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.969847] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.970479] kasan_report+0xbe/0xf0 [ 35.970978] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.971622] vma_interval_tree_remove+0xc75/0xec0 [ 35.972291] vma_prepare+0xc54/0x11a0 [ 35.972782] __split_vma+0x5af/0x950 [ 35.973334] ? __pfx___split_vma+0x10/0x10 [ 35.973880] ? find_held_lock+0x2c/0x110 [ 35.974420] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.975010] ? lock_is_held_type+0x9f/0x120 [ 35.975559] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.976208] ? mtree_range_walk+0x632/0x900 [ 35.976770] ? mas_walk+0x5c7/0x7c0 [ 35.977266] do_vmi_munmap+0x1f1/0x2b0 [ 35.977762] mmap_region+0x1f9/0x2660 [ 35.978260] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.978775] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.979502] ? __pfx_lock_acquire+0x10/0x10 [ 35.980072] ? __pfx_mmap_region+0x10/0x10 [ 35.980632] ? security_mmap_addr+0x7d/0xa0 [ 35.981184] ? get_unmapped_area+0x1f5/0x3f0 [ 35.981730] do_mmap+0x854/0xf00 [ 35.982191] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.982689] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.983273] ksys_mmap_pgoff+0x3af/0x500 [ 35.983780] do_syscall_64+0x3f/0x90 [ 35.984309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.984996] RIP: 0033:0x7ff3b011fd82 [ 35.985472] 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 [ 35.987718] RSP: 002b:00007fff30cdf988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.988707] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3b011fd82 [ 35.989607] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3af559000 [ 35.990503] RBP: 00007ff3af559000 R08: 0000000000000009 R09: 0000000000001000 [ 35.991416] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565750a8f70 [ 35.992348] R13: 00007fff30cdf9a0 R14: 00007fff30cdf9d0 R15: 00007fff30cdfd30 [ 35.993263] [ 35.993569] [ 35.993791] Allocated by task 211: [ 35.994247] kasan_save_stack+0x22/0x50 [ 35.994767] kasan_set_track+0x25/0x30 [ 35.995293] __kasan_slab_alloc+0x59/0x70 [ 35.995836] kmem_cache_alloc+0x16b/0x370 [ 35.996408] vm_area_dup+0x20/0x160 [ 35.996880] __split_vma+0x170/0x950 [ 35.997380] split_vma+0xc6/0x110 [ 35.997836] mprotect_fixup+0x8d2/0xb30 [ 35.998368] do_mprotect_pkey+0x87e/0xd40 [ 35.998916] __x64_sys_mprotect+0x78/0xc0 [ 35.999470] do_syscall_64+0x3f/0x90 [ 35.999981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.000680] [ 36.000903] Freed by task 211: [ 36.001319] kasan_save_stack+0x22/0x50 [ 36.001847] kasan_set_track+0x25/0x30 [ 36.002370] kasan_save_free_info+0x2b/0x50 [ 36.002928] __kasan_slab_free+0x10a/0x190 [ 36.003491] kmem_cache_free+0x10d/0x4d0 [ 36.004033] rcu_core+0x8c8/0x2860 [ 36.004515] __do_softirq+0x1b7/0x7d4 [ 36.005041] [ 36.005264] Last potentially related work creation: [ 36.005979] kasan_save_stack+0x22/0x50 [ 36.006503] __kasan_record_aux_stack+0x8e/0xa0 [ 36.007113] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.007783] remove_vma+0x139/0x170 [ 36.008285] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.008869] do_vmi_munmap+0x1f1/0x2b0 [ 36.009383] __vm_munmap+0x138/0x3a0 [ 36.009869] __x64_sys_munmap+0x59/0x80 [ 36.010412] do_syscall_64+0x3f/0x90 [ 36.010911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.011594] [ 36.011816] The buggy address belongs to the object at ffff88800dc4c9f8 [ 36.011816] which belongs to the cache vm_area_struct of size 168 [ 36.013408] The buggy address is located 88 bytes inside of [ 36.013408] freed 168-byte region [ffff88800dc4c9f8, ffff88800dc4caa0) [ 36.014893] [ 36.015141] The buggy address belongs to the physical page: [ 36.015835] page:00000000b612bc9c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc4c [ 36.017013] memcg:ffff88800de5dc01 [ 36.017460] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.018195] page_type: 0xffffffff() [ 36.018814] raw: 0100000000000200 ffff8880087a0c80 ffffea000036e540 dead000000000002 [ 36.019902] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de5dc01 [ 36.020880] page dumped because: kasan: bad access detected [ 36.021578] [ 36.021804] Memory state around the buggy address: [ 36.022429] ffff88800dc4c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.023341] ffff88800dc4c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 36.024278] >ffff88800dc4ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.025179] ^ [ 36.025903] ffff88800dc4ca80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 36.026804] ffff88800dc4cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.027710] ================================================================== [ 36.028791] Disabling lock debugging due to kernel taint [ 38.084156] BUG: Bad rss-counter state mm:00000000ddd85a57 type:MM_FILEPAGES val:33 [ 38.085324] BUG: Bad rss-counter state mm:00000000ddd85a57 type:MM_ANONPAGES val:22 [ 38.457172] BUG: Bad rss-counter state mm:00000000924a9332 type:MM_FILEPAGES val:33 [ 38.458829] BUG: Bad rss-counter state mm:00000000924a9332 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10858' (ECDSA) to the list of known hosts. 2023/06/20 12:54:03 fuzzer started 2023/06/20 12:54:04 dialing manager at localhost:36067 2023/06/20 12:54:04 checking machine... 2023/06/20 12:54:04 checking revisions... [ 39.192292] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:54:04 testing simple program... [ 39.251747] cgroup: Unknown subsys name 'net' [ 39.306132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:54:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000003 RCX=0000000000000000 RDX=1ffffffff0ba7c92 RSI=0000000000000000 RDI=ffffffff87b89c40 RBP=ffff88801c9a64d8 RSP=ffff888016d97668 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff87b89c40 R13=0000000000000000 R14=ffffffff87b6a200 R15=ffff88801c9a64c0 RIP=ffffffff812db5c8 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 00007f5de2c2e700 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=00007efc70b1b044 CR3=00000000096ea000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732033303a3435 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363939 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=0000000000000001 RCX=ffffffff864b3801 RDX=1ffff1100d9e134f RSI=ffffffff81288ac5 RDI=ffff88806cf09a78 RBP=ffff88806cf09b10 RSP=ffff88806cf09a08 R8 =ffffffff864b381e R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88806cf09a78 RIP=ffffffff8113060b 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 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=00007f988f763000 CR3=0000000010360000 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=0ebb31711859b4a1f24ccf03a4da667c XMM02=000000000011b130ec2efd57dc4c00df XMM03=0000000000121af0b25590b43586b089 XMM04=d4ec19139f9ccaae00000000000ae988 XMM05=751b9502027dc0b900000000001316a0 XMM06=f767d05d3e5831500000000000130878 XMM07=e042d86d42eb936e0000000000121d70 XMM08=b25590b43586b089000000000011b190 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000