syzkaller login: [ 38.835041] BUG: Bad rss-counter state mm:000000003052a0bc type:MM_FILEPAGES val:33 [ 38.836405] BUG: Bad rss-counter state mm:000000003052a0bc type:MM_ANONPAGES val:22 [ 38.991535] ================================================================== [ 38.992600] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.993708] Read of size 8 at addr ffff88800f1e7df0 by task sshd/225 [ 38.994787] [ 38.995045] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.995955] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.996943] Call Trace: [ 38.997259] [ 38.997545] dump_stack_lvl+0x91/0xf0 [ 38.998036] print_report+0xcc/0x620 [ 38.998530] ? __virt_addr_valid+0x102/0x340 [ 38.999085] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.999700] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.000319] kasan_report+0xbe/0xf0 [ 39.000796] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.001414] vma_interval_tree_remove+0xc75/0xec0 [ 39.002012] vma_prepare+0xc54/0x11a0 [ 39.002500] __split_vma+0x5af/0x950 [ 39.002970] ? __pfx___split_vma+0x10/0x10 [ 39.003495] ? find_held_lock+0x2c/0x110 [ 39.004013] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.004576] ? lock_is_held_type+0x9f/0x120 [ 39.005120] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.005727] ? mtree_range_walk+0x632/0x900 [ 39.006303] ? mas_walk+0x5c7/0x7c0 [ 39.006775] do_vmi_munmap+0x1f1/0x2b0 [ 39.007266] mmap_region+0x1f9/0x2660 [ 39.007744] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.008256] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.008968] ? __pfx_lock_acquire+0x10/0x10 [ 39.009499] ? __pfx_mmap_region+0x10/0x10 [ 39.010035] ? security_mmap_addr+0x7d/0xa0 [ 39.010577] ? get_unmapped_area+0x1f5/0x3f0 [ 39.011125] do_mmap+0x854/0xf00 [ 39.011562] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.012055] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.012615] ksys_mmap_pgoff+0x3af/0x500 [ 39.013122] do_syscall_64+0x3f/0x90 [ 39.013601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.014267] RIP: 0033:0x7efffe1b9d82 [ 39.014725] 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 [ 39.016862] RSP: 002b:00007fff85b0eed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.017772] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efffe1b9d82 [ 39.018652] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efffd5f3000 [ 39.019521] RBP: 00007efffd5f3000 R08: 0000000000000009 R09: 0000000000001000 [ 39.020374] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5ed61eec0 [ 39.021228] R13: 00007fff85b0eef0 R14: 00007fff85b0ef20 R15: 00007fff85b0f280 [ 39.022098] [ 39.022417] [ 39.022641] Allocated by task 218: [ 39.023080] kasan_save_stack+0x22/0x50 [ 39.023593] kasan_set_track+0x25/0x30 [ 39.024092] __kasan_slab_alloc+0x59/0x70 [ 39.024624] kmem_cache_alloc+0x16b/0x370 [ 39.025154] vm_area_dup+0x20/0x160 [ 39.025623] __split_vma+0x170/0x950 [ 39.026094] split_vma+0xc6/0x110 [ 39.026546] mprotect_fixup+0x8d2/0xb30 [ 39.027042] do_mprotect_pkey+0x87e/0xd40 [ 39.027561] __x64_sys_mprotect+0x78/0xc0 [ 39.028080] do_syscall_64+0x3f/0x90 [ 39.028555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.029196] [ 39.029415] Freed by task 218: [ 39.029804] kasan_save_stack+0x22/0x50 [ 39.030311] kasan_set_track+0x25/0x30 [ 39.030803] kasan_save_free_info+0x2b/0x50 [ 39.031337] __kasan_slab_free+0x10a/0x190 [ 39.031866] kmem_cache_free+0x10d/0x4d0 [ 39.032381] rcu_core+0x8c8/0x2860 [ 39.032820] __do_softirq+0x1b7/0x7d4 [ 39.033296] [ 39.033514] Last potentially related work creation: [ 39.034095] kasan_save_stack+0x22/0x50 [ 39.034614] __kasan_record_aux_stack+0x8e/0xa0 [ 39.035188] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.035827] remove_vma+0x139/0x170 [ 39.036282] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.036842] do_vmi_munmap+0x1f1/0x2b0 [ 39.037346] __vm_munmap+0x138/0x3a0 [ 39.037818] __x64_sys_munmap+0x59/0x80 [ 39.038330] do_syscall_64+0x3f/0x90 [ 39.038806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.039445] [ 39.039670] The buggy address belongs to the object at ffff88800f1e7d98 [ 39.039670] which belongs to the cache vm_area_struct of size 168 [ 39.041156] The buggy address is located 88 bytes inside of [ 39.041156] freed 168-byte region [ffff88800f1e7d98, ffff88800f1e7e40) [ 39.042596] [ 39.042813] The buggy address belongs to the physical page: [ 39.043473] page:00000000461932bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1e7 [ 39.044571] memcg:ffff88800f21c001 [ 39.045022] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.045714] page_type: 0xffffffff() [ 39.046197] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.047199] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f21c001 [ 39.048183] page dumped because: kasan: bad access detected [ 39.048898] [ 39.049128] Memory state around the buggy address: [ 39.049741] ffff88800f1e7c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.050674] ffff88800f1e7d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.051589] >ffff88800f1e7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.052504] ^ [ 39.053370] ffff88800f1e7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.054294] ffff88800f1e7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.055209] ================================================================== [ 39.056393] Disabling lock debugging due to kernel taint [ 41.198857] BUG: Bad rss-counter state mm:000000002ef421fd type:MM_FILEPAGES val:33 [ 41.199625] BUG: Bad rss-counter state mm:000000002ef421fd type:MM_ANONPAGES val:22 [ 41.651030] BUG: Bad rss-counter state mm:0000000066fdc144 type:MM_FILEPAGES val:33 [ 41.652052] BUG: Bad rss-counter state mm:0000000066fdc144 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5092' (ECDSA) to the list of known hosts. 2023/06/21 02:01:42 fuzzer started 2023/06/21 02:01:42 dialing manager at localhost:36067 2023/06/21 02:01:42 checking machine... 2023/06/21 02:01:42 checking revisions... [ 42.314381] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:01:42 testing simple program... [ 42.360387] cgroup: Unknown subsys name 'net' [ 42.393496] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:01:42 Registers: info registers vcpu 0 RAX=ffffffff86138eb5 RBX=0000000000000001 RCX=ffffffff86138eb0 RDX=dffffc0000000000 RSI=0000000000000005 RDI=ffffffff86138eb5 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff86138eb4 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff81130a95 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 00007fc321649900 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=00007f3c34504650 CR3=0000000013ac4000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d09aac4c54d8996400000000000ae988 XMM05=c3dee371b63c552400000000001327a0 XMM06=ae9b264101391a5b0000000000131220 XMM07=fb795ef6d65770560000000000121778 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009a751d8 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800f5bf500 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000bdd00000bdd R12=0000000000000000 R13=000000000000003b R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab1908 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 00007f3c33f4f900 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=00007f3c34506618 CR3=000000001bba2000 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