syzkaller login: [ 38.729405] BUG: Bad rss-counter state mm:00000000b6b7b019 type:MM_FILEPAGES val:32 [ 38.732061] BUG: Bad rss-counter state mm:00000000b6b7b019 type:MM_ANONPAGES val:22 [ 38.931101] ================================================================== [ 38.931988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.932730] Read of size 8 at addr ffff88800e379968 by task sshd/220 [ 38.933250] [ 38.933663] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.935173] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.937034] Call Trace: [ 38.937594] [ 38.938099] dump_stack_lvl+0x91/0xf0 [ 38.938947] print_report+0xcc/0x620 [ 38.939822] ? __virt_addr_valid+0x102/0x340 [ 38.940853] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.941978] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.943091] kasan_report+0xbe/0xf0 [ 38.943900] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.945032] vma_interval_tree_remove+0xc75/0xec0 [ 38.946122] vma_prepare+0xc54/0x11a0 [ 38.946974] __split_vma+0x5af/0x950 [ 38.947809] ? __pfx___split_vma+0x10/0x10 [ 38.948793] ? find_held_lock+0x2c/0x110 [ 38.949789] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.950749] ? lock_is_held_type+0x9f/0x120 [ 38.951698] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.952806] ? mtree_range_walk+0x632/0x900 [ 38.953841] ? mas_walk+0x5c7/0x7c0 [ 38.954664] do_vmi_munmap+0x1f1/0x2b0 [ 38.955544] mmap_region+0x1f9/0x2660 [ 38.956421] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.957372] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.958669] ? __pfx_lock_acquire+0x10/0x10 [ 38.959641] ? __pfx_mmap_region+0x10/0x10 [ 38.960565] ? security_mmap_addr+0x7d/0xa0 [ 38.961543] ? get_unmapped_area+0x1f5/0x3f0 [ 38.962485] do_mmap+0x854/0xf00 [ 38.963235] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.964099] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.965087] ksys_mmap_pgoff+0x3af/0x500 [ 38.965983] do_syscall_64+0x3f/0x90 [ 38.966838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.968007] RIP: 0033:0x7fdbc8161d82 [ 38.968806] 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 [ 38.972832] RSP: 002b:00007ffc845c9618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.974524] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbc8161d82 [ 38.976105] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbc759b000 [ 38.977717] RBP: 00007fdbc759b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.979369] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633abc90ec0 [ 38.980955] R13: 00007ffc845c9630 R14: 00007ffc845c9660 R15: 00007ffc845c99c0 [ 38.982516] [ 38.983005] [ 38.983383] Allocated by task 211: [ 38.984119] kasan_save_stack+0x22/0x50 [ 38.984996] kasan_set_track+0x25/0x30 [ 38.985860] __kasan_slab_alloc+0x59/0x70 [ 38.986773] kmem_cache_alloc+0x16b/0x370 [ 38.987727] vm_area_dup+0x20/0x160 [ 38.988543] __split_vma+0x170/0x950 [ 38.989366] split_vma+0xc6/0x110 [ 38.990140] mprotect_fixup+0x8d2/0xb30 [ 38.991040] do_mprotect_pkey+0x87e/0xd40 [ 38.991939] __x64_sys_mprotect+0x78/0xc0 [ 38.992908] do_syscall_64+0x3f/0x90 [ 38.993734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.994916] [ 38.995297] Freed by task 211: [ 38.996006] kasan_save_stack+0x22/0x50 [ 38.996892] kasan_set_track+0x25/0x30 [ 38.997764] kasan_save_free_info+0x2b/0x50 [ 38.998735] __kasan_slab_free+0x10a/0x190 [ 38.999687] kmem_cache_free+0x10d/0x4d0 [ 39.000608] rcu_core+0x8c8/0x2860 [ 39.001387] __do_softirq+0x1b7/0x7d4 [ 39.002211] [ 39.002576] Last potentially related work creation: [ 39.003684] kasan_save_stack+0x22/0x50 [ 39.004579] __kasan_record_aux_stack+0x8e/0xa0 [ 39.005630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.006789] remove_vma+0x139/0x170 [ 39.007590] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.008585] do_vmi_munmap+0x1f1/0x2b0 [ 39.009473] __vm_munmap+0x138/0x3a0 [ 39.010293] __x64_sys_munmap+0x59/0x80 [ 39.011186] do_syscall_64+0x3f/0x90 [ 39.012017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.013197] [ 39.013565] Second to last potentially related work creation: [ 39.014822] kasan_save_stack+0x22/0x50 [ 39.015671] __kasan_record_aux_stack+0x8e/0xa0 [ 39.016772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.018014] remove_vma+0x139/0x170 [ 39.018878] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.019926] do_vmi_munmap+0x1f1/0x2b0 [ 39.020848] mmap_region+0x1f9/0x2660 [ 39.021781] do_mmap+0x854/0xf00 [ 39.022597] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.023548] ksys_mmap_pgoff+0x3af/0x500 [ 39.024502] do_syscall_64+0x3f/0x90 [ 39.025388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.026601] [ 39.026977] The buggy address belongs to the object at ffff88800e379910 [ 39.026977] which belongs to the cache vm_area_struct of size 168 [ 39.029965] The buggy address is located 88 bytes inside of [ 39.029965] freed 168-byte region [ffff88800e379910, ffff88800e3799b8) [ 39.032812] [ 39.033204] The buggy address belongs to the physical page: [ 39.034504] page:000000004f6df6ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe379 [ 39.036684] memcg:ffff88801413b301 [ 39.037514] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.038848] page_type: 0xffffffff() [ 39.039654] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.041258] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801413b301 [ 39.042659] page dumped because: kasan: bad access detected [ 39.043078] [ 39.043217] Memory state around the buggy address: [ 39.043586] ffff88800e379800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.044138] ffff88800e379880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.044677] >ffff88800e379900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.045245] ^ [ 39.045764] ffff88800e379980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.046298] ffff88800e379a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.046872] ================================================================== [ 39.047664] Disabling lock debugging due to kernel taint [ 41.455333] BUG: Bad rss-counter state mm:0000000062b2ea1c type:MM_FILEPAGES val:33 [ 41.456016] BUG: Bad rss-counter state mm:0000000062b2ea1c type:MM_ANONPAGES val:22 [ 42.165893] BUG: Bad rss-counter state mm:00000000209cbe47 type:MM_FILEPAGES val:33 [ 42.166598] BUG: Bad rss-counter state mm:00000000209cbe47 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17953' (ECDSA) to the list of known hosts. 2023/06/21 09:57:45 fuzzer started 2023/06/21 09:57:45 dialing manager at localhost:36067 2023/06/21 09:57:45 checking machine... 2023/06/21 09:57:45 checking revisions... [ 43.123949] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:57:45 testing simple program... [ 43.167951] cgroup: Unknown subsys name 'net' [ 43.214578] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:57:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8450cc7f RCX=0000000000000001 RDX=1ffff11002c70ea2 RSI=ffff888016387f30 RDI=ffffffff8450cc7f RBP=ffff888016387510 RSP=ffff888016387488 R8 =0000000000000001 R9 =ffff8880163874f8 R10=0000000000038001 R11=00000000000231e7 R12=ffff888016387580 R13=0000000000000000 R14=ffff888015bfb680 R15=ffff88800d830600 RIP=ffffffff811fc7a0 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 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=00007f2e16d98790 CR3=000000001aecc000 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=0000000000000340fffffffe7ffbfeff XMM01=00000000000000000000000000000000 XMM02=00000000000000020000000000000000 XMM03=00000000000000008000000000000006 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=000055e682d2b980 CR3=000000001adb0000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000