syzkaller login: [ 28.898401] BUG: Bad rss-counter state mm:0000000068ce3539 type:MM_FILEPAGES val:33 [ 28.900112] BUG: Bad rss-counter state mm:0000000068ce3539 type:MM_ANONPAGES val:22 [ 28.936478] ================================================================== [ 28.937504] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.938528] Read of size 8 at addr ffff8880181c9798 by task sshd/221 [ 28.939366] [ 28.939600] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.940555] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.941624] Call Trace: [ 28.941981] [ 28.942312] dump_stack_lvl+0x91/0xf0 [ 28.942839] print_report+0xcc/0x620 [ 28.943348] ? __virt_addr_valid+0x102/0x340 [ 28.943978] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.944648] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.945285] kasan_report+0xbe/0xf0 [ 28.945773] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.946523] vma_interval_tree_remove+0xc75/0xec0 [ 28.947126] vma_prepare+0xc54/0x11a0 [ 28.947599] __split_vma+0x5af/0x950 [ 28.948063] ? __pfx___split_vma+0x10/0x10 [ 28.948585] ? find_held_lock+0x2c/0x110 [ 28.949105] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.949684] ? lock_is_held_type+0x9f/0x120 [ 28.950227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.950823] ? mtree_range_walk+0x632/0x900 [ 28.951371] ? mas_walk+0x5c7/0x7c0 [ 28.951849] do_vmi_munmap+0x1f1/0x2b0 [ 28.952334] mmap_region+0x1f9/0x2660 [ 28.952811] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.953314] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.954026] ? __pfx_lock_acquire+0x10/0x10 [ 28.954553] ? __pfx_mmap_region+0x10/0x10 [ 28.955080] ? security_mmap_addr+0x7d/0xa0 [ 28.955603] ? get_unmapped_area+0x1f5/0x3f0 [ 28.956149] do_mmap+0x854/0xf00 [ 28.956587] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.957086] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.957644] ksys_mmap_pgoff+0x3af/0x500 [ 28.958157] do_syscall_64+0x3f/0x90 [ 28.958634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.959272] RIP: 0033:0x7f93810dbd82 [ 28.959720] 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 [ 28.961831] RSP: 002b:00007ffc8a703658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.962725] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f93810dbd82 [ 28.963558] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9380515000 [ 28.964398] RBP: 00007f9380515000 R08: 0000000000000009 R09: 0000000000001000 [ 28.965388] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca251f6d90 [ 28.966239] R13: 00007ffc8a703670 R14: 00007ffc8a7036a0 R15: 00007ffc8a703a00 [ 28.967088] [ 28.967378] [ 28.967588] Allocated by task 213: [ 28.968014] kasan_save_stack+0x22/0x50 [ 28.968505] kasan_set_track+0x25/0x30 [ 28.968990] __kasan_slab_alloc+0x59/0x70 [ 28.969499] kmem_cache_alloc+0x16b/0x370 [ 28.970014] vm_area_dup+0x20/0x160 [ 28.970463] __split_vma+0x170/0x950 [ 28.970922] split_vma+0xc6/0x110 [ 28.971385] mprotect_fixup+0x8d2/0xb30 [ 28.971902] do_mprotect_pkey+0x87e/0xd40 [ 28.972444] __x64_sys_mprotect+0x78/0xc0 [ 28.972984] do_syscall_64+0x3f/0x90 [ 28.973478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.974157] [ 28.974383] Freed by task 203: [ 28.974802] kasan_save_stack+0x22/0x50 [ 28.975322] kasan_set_track+0x25/0x30 [ 28.975833] kasan_save_free_info+0x2b/0x50 [ 28.976380] __kasan_slab_free+0x10a/0x190 [ 28.976927] kmem_cache_free+0x10d/0x4d0 [ 28.977454] rcu_core+0x8c8/0x2860 [ 28.977940] __do_softirq+0x1b7/0x7d4 [ 28.978436] [ 28.978657] Last potentially related work creation: [ 28.979269] kasan_save_stack+0x22/0x50 [ 28.979787] __kasan_record_aux_stack+0x8e/0xa0 [ 28.980385] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.981063] remove_vma+0x139/0x170 [ 28.981532] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.982124] do_vmi_munmap+0x1f1/0x2b0 [ 28.982622] __vm_munmap+0x138/0x3a0 [ 28.983086] __x64_sys_munmap+0x59/0x80 [ 28.983584] do_syscall_64+0x3f/0x90 [ 28.984062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.984704] [ 28.984918] The buggy address belongs to the object at ffff8880181c9740 [ 28.984918] which belongs to the cache vm_area_struct of size 168 [ 28.986391] The buggy address is located 88 bytes inside of [ 28.986391] freed 168-byte region [ffff8880181c9740, ffff8880181c97e8) [ 28.987788] [ 28.988002] The buggy address belongs to the physical page: [ 28.988655] page:00000000fd3e9d6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181c9 [ 28.989763] memcg:ffff888019db6e01 [ 28.990189] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.990890] page_type: 0xffffffff() [ 28.991339] raw: 0100000000000200 ffff8880087a0c80 ffffea0000678480 dead00000000000d [ 28.992267] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019db6e01 [ 28.993181] page dumped because: kasan: bad access detected [ 28.993860] [ 28.994079] Memory state around the buggy address: [ 28.994660] ffff8880181c9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.995523] ffff8880181c9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.996383] >ffff8880181c9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.997250] ^ [ 28.997760] ffff8880181c9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.998628] ffff8880181c9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.999500] ================================================================== [ 29.000510] Disabling lock debugging due to kernel taint [ 30.897340] BUG: Bad rss-counter state mm:0000000017e97952 type:MM_FILEPAGES val:33 [ 30.898417] BUG: Bad rss-counter state mm:0000000017e97952 type:MM_ANONPAGES val:22 [ 31.479297] BUG: Bad rss-counter state mm:0000000078e38e1b type:MM_FILEPAGES val:33 [ 31.480726] BUG: Bad rss-counter state mm:0000000078e38e1b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26322' (ECDSA) to the list of known hosts. 2023/06/21 05:45:38 fuzzer started 2023/06/21 05:45:38 dialing manager at localhost:36067 2023/06/21 05:45:38 checking machine... 2023/06/21 05:45:38 checking revisions... [ 32.089040] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:45:39 testing simple program... [ 32.137592] cgroup: Unknown subsys name 'net' [ 32.174039] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:45:38 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f5ef96a7650 CR3=00000000168ca000 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=2038333a35343a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a35343a3530203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff813ad470 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88801477f6b8 RSP=ffff88801477f620 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=ffff88801477f6e8 R13=0000000000000000 R14=ffff888014780000 R15=ffff88801a056130 RIP=ffffffff810bd06d 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f979dc26900 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=00007f979d087ba0 CR3=000000000d82a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d3ee2d5c30c650ac00000000000ae988 XMM05=b897ad42844c643c0000000000132ae8 XMM06=be7c979388ee248e0000000000131888 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000