syzkaller login: [ 28.758674] BUG: Bad rss-counter state mm:000000007b7f3128 type:MM_FILEPAGES val:33 [ 28.760448] BUG: Bad rss-counter state mm:000000007b7f3128 type:MM_ANONPAGES val:22 [ 28.973514] ================================================================== [ 28.974427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.975386] Read of size 8 at addr ffff88800d923228 by task sshd/222 [ 28.976198] [ 28.976530] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.977403] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.978410] Call Trace: [ 28.978752] [ 28.979040] dump_stack_lvl+0x91/0xf0 [ 28.979564] print_report+0xcc/0x620 [ 28.980095] ? __virt_addr_valid+0x102/0x340 [ 28.980673] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.981294] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.981935] kasan_report+0xbe/0xf0 [ 28.982421] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.983070] vma_interval_tree_remove+0xc75/0xec0 [ 28.983698] vma_prepare+0xc54/0x11a0 [ 28.984194] __split_vma+0x5af/0x950 [ 28.984686] ? __pfx___split_vma+0x10/0x10 [ 28.985221] ? find_held_lock+0x2c/0x110 [ 28.985758] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.986327] ? lock_is_held_type+0x9f/0x120 [ 28.986889] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.987532] ? mtree_range_walk+0x632/0x900 [ 28.988110] ? mas_walk+0x5c7/0x7c0 [ 28.988601] do_vmi_munmap+0x1f1/0x2b0 [ 28.989099] mmap_region+0x1f9/0x2660 [ 28.989595] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.990113] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.990840] ? __pfx_lock_acquire+0x10/0x10 [ 28.991376] ? __pfx_mmap_region+0x10/0x10 [ 28.991967] ? security_mmap_addr+0x7d/0xa0 [ 28.992522] ? get_unmapped_area+0x1f5/0x3f0 [ 28.993081] do_mmap+0x854/0xf00 [ 28.993536] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.994039] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.994627] ksys_mmap_pgoff+0x3af/0x500 [ 28.995143] do_syscall_64+0x3f/0x90 [ 28.995651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.996333] RIP: 0033:0x7fccf40d7d82 [ 28.996813] 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 [ 28.998987] RSP: 002b:00007ffe30143c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.999935] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccf40d7d82 [ 29.000808] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccf3511000 [ 29.001677] RBP: 00007fccf3511000 R08: 0000000000000009 R09: 0000000000001000 [ 29.002551] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582b197eec0 [ 29.003409] R13: 00007ffe30143c20 R14: 00007ffe30143c50 R15: 00007ffe30143fb0 [ 29.004339] [ 29.004648] [ 29.004866] Allocated by task 212: [ 29.005299] kasan_save_stack+0x22/0x50 [ 29.005828] kasan_set_track+0x25/0x30 [ 29.006335] __kasan_slab_alloc+0x59/0x70 [ 29.006875] kmem_cache_alloc+0x16b/0x370 [ 29.007398] vm_area_dup+0x20/0x160 [ 29.007894] __split_vma+0x170/0x950 [ 29.008367] split_vma+0xc6/0x110 [ 29.008827] mprotect_fixup+0x8d2/0xb30 [ 29.009335] do_mprotect_pkey+0x87e/0xd40 [ 29.009879] __x64_sys_mprotect+0x78/0xc0 [ 29.010404] do_syscall_64+0x3f/0x90 [ 29.010899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.011564] [ 29.011794] Freed by task 212: [ 29.012193] kasan_save_stack+0x22/0x50 [ 29.012720] kasan_set_track+0x25/0x30 [ 29.013220] kasan_save_free_info+0x2b/0x50 [ 29.013767] __kasan_slab_free+0x10a/0x190 [ 29.014307] kmem_cache_free+0x10d/0x4d0 [ 29.014834] rcu_core+0x8c8/0x2860 [ 29.015282] __do_softirq+0x1b7/0x7d4 [ 29.015809] [ 29.016038] Last potentially related work creation: [ 29.016646] kasan_save_stack+0x22/0x50 [ 29.017152] __kasan_record_aux_stack+0x8e/0xa0 [ 29.017747] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.018393] remove_vma+0x139/0x170 [ 29.018866] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.019466] do_vmi_munmap+0x1f1/0x2b0 [ 29.020010] __vm_munmap+0x138/0x3a0 [ 29.020514] __x64_sys_munmap+0x59/0x80 [ 29.021046] do_syscall_64+0x3f/0x90 [ 29.021558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.022229] [ 29.022450] Second to last potentially related work creation: [ 29.023164] kasan_save_stack+0x22/0x50 [ 29.023713] __kasan_record_aux_stack+0x8e/0xa0 [ 29.024350] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.025036] remove_vma+0x139/0x170 [ 29.025516] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.026102] do_vmi_munmap+0x1f1/0x2b0 [ 29.026614] mmap_region+0x1f9/0x2660 [ 29.027117] do_mmap+0x854/0xf00 [ 29.027578] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.028113] ksys_mmap_pgoff+0x3af/0x500 [ 29.028663] do_syscall_64+0x3f/0x90 [ 29.029157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.029863] [ 29.030089] The buggy address belongs to the object at ffff88800d9231d0 [ 29.030089] which belongs to the cache vm_area_struct of size 168 [ 29.031656] The buggy address is located 88 bytes inside of [ 29.031656] freed 168-byte region [ffff88800d9231d0, ffff88800d923278) [ 29.033182] [ 29.033408] The buggy address belongs to the physical page: [ 29.034121] page:00000000e13c8fe4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd923 [ 29.035293] memcg:ffff88800d21e701 [ 29.035807] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.036525] page_type: 0xffffffff() [ 29.037026] raw: 0100000000000200 ffff8880087a0c80 ffffea00004fd880 dead000000000002 [ 29.038023] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d21e701 [ 29.038990] page dumped because: kasan: bad access detected [ 29.039698] [ 29.039931] Memory state around the buggy address: [ 29.040560] ffff88800d923100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.041488] ffff88800d923180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.042404] >ffff88800d923200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.043316] ^ [ 29.043957] ffff88800d923280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 29.044897] ffff88800d923300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 29.045802] ================================================================== [ 29.046873] Disabling lock debugging due to kernel taint [ 31.082381] BUG: Bad rss-counter state mm:000000009053539a type:MM_FILEPAGES val:33 [ 31.083563] BUG: Bad rss-counter state mm:000000009053539a type:MM_ANONPAGES val:22 [ 31.463839] BUG: Bad rss-counter state mm:00000000c8f05613 type:MM_FILEPAGES val:33 [ 31.465181] BUG: Bad rss-counter state mm:00000000c8f05613 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25043' (ECDSA) to the list of known hosts. 2023/06/21 07:49:50 fuzzer started 2023/06/21 07:49:50 dialing manager at localhost:36067 2023/06/21 07:49:50 checking machine... 2023/06/21 07:49:50 checking revisions... [ 32.223413] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:49:50 testing simple program... [ 32.274312] cgroup: Unknown subsys name 'net' [ 32.316347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:49:49 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8180713d RBP=ffff8880147af740 RSP=ffff8880147af678 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=ffff88806ce3de20 R15=ffff88806ce3de00 RIP=ffffffff845118ab RFL=00000046 [---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 00007fb8b3dc9900 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=00007fb8b437e650 CR3=000000001a376000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffdc73aad18 CR3=0000000005482000 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=00007f9409bbb510000055ada04ed790 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