syzkaller login: [ 30.847743] BUG: Bad rss-counter state mm:000000008e5b966c type:MM_FILEPAGES val:33 [ 30.849082] BUG: Bad rss-counter state mm:000000008e5b966c type:MM_ANONPAGES val:22 [ 30.883189] ================================================================== [ 30.884274] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.885272] Read of size 8 at addr ffff88800df416b0 by task sshd/220 [ 30.886135] [ 30.886357] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.887231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.888381] Call Trace: [ 30.888704] [ 30.889049] dump_stack_lvl+0x91/0xf0 [ 30.889652] print_report+0xcc/0x620 [ 30.890206] ? __virt_addr_valid+0x102/0x340 [ 30.890814] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.891487] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.892156] kasan_report+0xbe/0xf0 [ 30.892711] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.893470] vma_interval_tree_remove+0xc75/0xec0 [ 30.894125] vma_prepare+0xc54/0x11a0 [ 30.894607] __split_vma+0x5af/0x950 [ 30.895080] ? __pfx___split_vma+0x10/0x10 [ 30.895609] ? find_held_lock+0x2c/0x110 [ 30.896143] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.896712] ? lock_is_held_type+0x9f/0x120 [ 30.897256] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.897870] ? mtree_range_walk+0x632/0x900 [ 30.898427] ? mas_walk+0x5c7/0x7c0 [ 30.898906] do_vmi_munmap+0x1f1/0x2b0 [ 30.899401] mmap_region+0x1f9/0x2660 [ 30.899907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.900416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.901136] ? __pfx_lock_acquire+0x10/0x10 [ 30.901670] ? __pfx_mmap_region+0x10/0x10 [ 30.902198] ? security_mmap_addr+0x7d/0xa0 [ 30.902724] ? get_unmapped_area+0x1f5/0x3f0 [ 30.903285] do_mmap+0x854/0xf00 [ 30.903727] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.904232] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.904795] ksys_mmap_pgoff+0x3af/0x500 [ 30.905309] do_syscall_64+0x3f/0x90 [ 30.905795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.906442] RIP: 0033:0x7fa762bc5d82 [ 30.906898] 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 [ 30.909025] RSP: 002b:00007ffe6e34e918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.909925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa762bc5d82 [ 30.910770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa761fff000 [ 30.911807] RBP: 00007fa761fff000 R08: 0000000000000009 R09: 0000000000001000 [ 30.912680] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb28f43f70 [ 30.913527] R13: 00007ffe6e34e930 R14: 00007ffe6e34e960 R15: 00007ffe6e34ecc0 [ 30.914402] [ 30.914690] [ 30.914905] Allocated by task 213: [ 30.915334] kasan_save_stack+0x22/0x50 [ 30.915859] kasan_set_track+0x25/0x30 [ 30.916351] __kasan_slab_alloc+0x59/0x70 [ 30.916873] kmem_cache_alloc+0x16b/0x370 [ 30.917384] vm_area_dup+0x20/0x160 [ 30.917839] __split_vma+0x170/0x950 [ 30.918304] split_vma+0xc6/0x110 [ 30.918738] mprotect_fixup+0x8d2/0xb30 [ 30.919234] do_mprotect_pkey+0x87e/0xd40 [ 30.919751] __x64_sys_mprotect+0x78/0xc0 [ 30.920279] do_syscall_64+0x3f/0x90 [ 30.920753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.921390] [ 30.921604] Freed by task 213: [ 30.921999] kasan_save_stack+0x22/0x50 [ 30.922498] kasan_set_track+0x25/0x30 [ 30.922992] kasan_save_free_info+0x2b/0x50 [ 30.923521] __kasan_slab_free+0x10a/0x190 [ 30.924064] kmem_cache_free+0x10d/0x4d0 [ 30.924572] rcu_core+0x8c8/0x2860 [ 30.925023] __do_softirq+0x1b7/0x7d4 [ 30.925500] [ 30.925721] Last potentially related work creation: [ 30.926311] kasan_save_stack+0x22/0x50 [ 30.926808] __kasan_record_aux_stack+0x8e/0xa0 [ 30.927374] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.928025] remove_vma+0x139/0x170 [ 30.928476] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.929037] do_vmi_munmap+0x1f1/0x2b0 [ 30.929518] __vm_munmap+0x138/0x3a0 [ 30.929990] __x64_sys_munmap+0x59/0x80 [ 30.930487] do_syscall_64+0x3f/0x90 [ 30.930964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.931592] [ 30.931811] Second to last potentially related work creation: [ 30.932475] kasan_save_stack+0x22/0x50 [ 30.932966] __kasan_record_aux_stack+0x8e/0xa0 [ 30.933529] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.934164] remove_vma+0x139/0x170 [ 30.934604] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.935149] do_vmi_munmap+0x1f1/0x2b0 [ 30.935623] mmap_region+0x1f9/0x2660 [ 30.936100] do_mmap+0x854/0xf00 [ 30.936527] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.937014] ksys_mmap_pgoff+0x3af/0x500 [ 30.937502] do_syscall_64+0x3f/0x90 [ 30.937970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.938605] [ 30.938815] The buggy address belongs to the object at ffff88800df41658 [ 30.938815] which belongs to the cache vm_area_struct of size 168 [ 30.940270] The buggy address is located 88 bytes inside of [ 30.940270] freed 168-byte region [ffff88800df41658, ffff88800df41700) [ 30.941634] [ 30.941848] The buggy address belongs to the physical page: [ 30.942488] page:000000009ce9e53e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf41 [ 30.943548] memcg:ffff8880098ecd01 [ 30.943979] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.944609] page_type: 0xffffffff() [ 30.945053] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a8400 dead000000000004 [ 30.945954] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098ecd01 [ 30.946836] page dumped because: kasan: bad access detected [ 30.947484] [ 30.947696] Memory state around the buggy address: [ 30.948281] ffff88800df41580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.949115] ffff88800df41600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.949947] >ffff88800df41680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.950776] ^ [ 30.951349] ffff88800df41700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.952195] ffff88800df41780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.953023] ================================================================== [ 30.954229] Disabling lock debugging due to kernel taint [ 32.927145] BUG: Bad rss-counter state mm:00000000521932ef type:MM_FILEPAGES val:33 [ 32.928398] BUG: Bad rss-counter state mm:00000000521932ef type:MM_ANONPAGES val:22 [ 33.420222] BUG: Bad rss-counter state mm:00000000ffe221f9 type:MM_FILEPAGES val:33 [ 33.421231] BUG: Bad rss-counter state mm:00000000ffe221f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27962' (ECDSA) to the list of known hosts. 2023/06/20 12:39:34 fuzzer started 2023/06/20 12:39:34 dialing manager at localhost:36067 2023/06/20 12:39:34 checking machine... 2023/06/20 12:39:34 checking revisions... [ 34.138296] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:39:34 testing simple program... [ 34.185221] cgroup: Unknown subsys name 'net' [ 34.232139] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:39:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888014248000 RCX=1ffffffff0a57fda RDX=0000000000000000 RSI=ffff8880143851c0 RDI=ffff88806ce39500 RBP=ffff88806ce39500 RSP=ffff88806ce09e48 R8 =00000000000b1400 R9 =ffff88806ce395d0 R10=ffff888014385250 R11=0000000000000001 R12=ffffffff852bfeb0 R13=ffff88806ce39ed8 R14=ffffffff852bfeb0 R15=ffff88806ce39500 RIP=ffffffff8125325e 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 00007f7d7ad62900 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=00007f7d7b319618 CR3=000000000e6b2000 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=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 info registers vcpu 1 RAX=0000000080000001 RBX=ffff88806cf2c240 RCX=0000000080000001 RDX=0000000000000000 RSI=ffffffff813c91b7 RDI=ffffffff85d3d350 RBP=ffff88806cf2c2b0 RSP=ffff88806cf09f50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88806cf2c2b8 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0871 RFL=00000082 [--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 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=00007f824862ca40 CR3=000000000c614000 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=c69a3732e075af9dc84d856f72a003e0 XMM02=ec2efd57dc4c00df000000000011ad10 XMM03=e55ca84da92cd40c000000000011ade0 XMM04=83c5bc088f1b864500000000000ae988 XMM05=19e9129bd510f2350000000000133478 XMM06=7aa97d6d1f97666300000000001322e0 XMM07=e042d86d42eb936e0000000000122540 XMM08=e55ca84da92cd40c000000000011ade0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000