syzkaller login: [ 30.495669] BUG: Bad rss-counter state mm:000000000c45ae38 type:MM_FILEPAGES val:33 [ 30.497498] BUG: Bad rss-counter state mm:000000000c45ae38 type:MM_ANONPAGES val:22 [ 30.661892] ================================================================== [ 30.662802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.663723] Read of size 8 at addr ffff88800cb53ed8 by task sshd/220 [ 30.664544] [ 30.664867] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.665722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.666703] Call Trace: [ 30.667029] [ 30.667305] dump_stack_lvl+0x91/0xf0 [ 30.667783] print_report+0xcc/0x620 [ 30.668244] ? __virt_addr_valid+0x102/0x340 [ 30.668799] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.669397] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.670011] kasan_report+0xbe/0xf0 [ 30.670537] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.671182] vma_interval_tree_remove+0xc75/0xec0 [ 30.671793] vma_prepare+0xc54/0x11a0 [ 30.672252] __split_vma+0x5af/0x950 [ 30.672738] ? __pfx___split_vma+0x10/0x10 [ 30.673236] ? find_held_lock+0x2c/0x110 [ 30.673752] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.674293] ? lock_is_held_type+0x9f/0x120 [ 30.674832] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.675502] ? mtree_range_walk+0x632/0x900 [ 30.676053] ? mas_walk+0x5c7/0x7c0 [ 30.676520] do_vmi_munmap+0x1f1/0x2b0 [ 30.677013] mmap_region+0x1f9/0x2660 [ 30.677473] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.677978] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.678670] ? __pfx_lock_acquire+0x10/0x10 [ 30.679170] ? __pfx_mmap_region+0x10/0x10 [ 30.679689] ? security_mmap_addr+0x7d/0xa0 [ 30.680189] ? get_unmapped_area+0x1f5/0x3f0 [ 30.680742] do_mmap+0x854/0xf00 [ 30.681172] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.681668] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.682220] ksys_mmap_pgoff+0x3af/0x500 [ 30.682734] do_syscall_64+0x3f/0x90 [ 30.683201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.683855] RIP: 0033:0x7fb1b6b7dd82 [ 30.684293] 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 [ 30.686496] RSP: 002b:00007ffd7217aaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.687411] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb1b6b7dd82 [ 30.688256] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb1b5fb7000 [ 30.689090] RBP: 00007fb1b5fb7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.689894] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555cde372ec0 [ 30.690702] R13: 00007ffd7217aac0 R14: 00007ffd7217aaf0 R15: 00007ffd7217ae50 [ 30.691509] [ 30.691802] [ 30.692006] Allocated by task 213: [ 30.692437] kasan_save_stack+0x22/0x50 [ 30.692928] kasan_set_track+0x25/0x30 [ 30.693393] __kasan_slab_alloc+0x59/0x70 [ 30.693898] kmem_cache_alloc+0x16b/0x370 [ 30.694389] vm_area_dup+0x20/0x160 [ 30.694874] __split_vma+0x170/0x950 [ 30.695324] split_vma+0xc6/0x110 [ 30.695761] mprotect_fixup+0x8d2/0xb30 [ 30.696263] do_mprotect_pkey+0x87e/0xd40 [ 30.696812] __x64_sys_mprotect+0x78/0xc0 [ 30.697317] do_syscall_64+0x3f/0x90 [ 30.697796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.698430] [ 30.698650] Freed by task 213: [ 30.699036] kasan_save_stack+0x22/0x50 [ 30.699540] kasan_set_track+0x25/0x30 [ 30.700038] kasan_save_free_info+0x2b/0x50 [ 30.700578] __kasan_slab_free+0x10a/0x190 [ 30.701108] kmem_cache_free+0x10d/0x4d0 [ 30.701611] rcu_core+0x8c8/0x2860 [ 30.702060] __do_softirq+0x1b7/0x7d4 [ 30.702535] [ 30.702764] Last potentially related work creation: [ 30.703332] kasan_save_stack+0x22/0x50 [ 30.703836] __kasan_record_aux_stack+0x8e/0xa0 [ 30.704400] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.705037] remove_vma+0x139/0x170 [ 30.705481] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.706036] do_vmi_munmap+0x1f1/0x2b0 [ 30.706531] __vm_munmap+0x138/0x3a0 [ 30.707050] __x64_sys_munmap+0x59/0x80 [ 30.707535] do_syscall_64+0x3f/0x90 [ 30.708059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.708795] [ 30.709053] The buggy address belongs to the object at ffff88800cb53e80 [ 30.709053] which belongs to the cache vm_area_struct of size 168 [ 30.710762] The buggy address is located 88 bytes inside of [ 30.710762] freed 168-byte region [ffff88800cb53e80, ffff88800cb53f28) [ 30.712124] [ 30.712346] The buggy address belongs to the physical page: [ 30.712987] page:00000000b9aa6a1e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb53 [ 30.714021] memcg:ffff88800d3af901 [ 30.714421] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.715026] page_type: 0xffffffff() [ 30.715456] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.716334] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3af901 [ 30.717184] page dumped because: kasan: bad access detected [ 30.717802] [ 30.718009] Memory state around the buggy address: [ 30.718551] ffff88800cb53d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.719352] ffff88800cb53e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.720161] >ffff88800cb53e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.720995] ^ [ 30.721710] ffff88800cb53f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.722541] ffff88800cb53f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.723364] ================================================================== [ 30.724333] Disabling lock debugging due to kernel taint [ 33.205671] BUG: Bad rss-counter state mm:0000000071a179a1 type:MM_FILEPAGES val:33 [ 33.206881] BUG: Bad rss-counter state mm:0000000071a179a1 type:MM_ANONPAGES val:22 [ 33.703753] BUG: Bad rss-counter state mm:000000001cb4861d type:MM_FILEPAGES val:33 [ 33.705143] BUG: Bad rss-counter state mm:000000001cb4861d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7534' (ECDSA) to the list of known hosts. 2023/06/20 21:05:33 fuzzer started 2023/06/20 21:05:33 dialing manager at localhost:36067 2023/06/20 21:05:33 checking machine... 2023/06/20 21:05:33 checking revisions... [ 34.449116] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:05:33 testing simple program... [ 34.500473] cgroup: Unknown subsys name 'net' [ 34.585158] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:05:33 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=00000000005b99b3 RCX=0000000000000000 RDX=ffff8880147db680 RSI=ffffffff813c819b RDI=0000000000000006 RBP=ffff88800cd7fd00 RSP=ffff88800cd7fc38 R8 =0000000000000006 R9 =000f424000000000 R10=000f424000000000 R11=0000000000000000 R12=000f424000000000 R13=00000000002aa4fc R14=00000000000f8610 R15=00000000005b99b3 RIP=ffffffff814c0864 RFL=00000002 [-------] 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 00007f0f634f3900 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=00007f0f62a11000 CR3=000000000ecb0000 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=2fccd54c36d8a3f300000000000fa3d0 XMM01=82596c10d073669f13417bfd8b26592b XMM02=eff9b2d0a8fce9cb000000000011d618 XMM03=2c67c8bc2e329bc3000000000011d740 XMM04=26c975931b87ce8600000000000ae988 XMM05=16adbdbfd91b87910000000000132de8 XMM06=19e9129bd510f2350000000000131c80 XMM07=fb795ef6d65770560000000000121e08 XMM08=2c67c8bc2e329bc3000000000011d740 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000004 RCX=ffffffff81f1ae0d RDX=ffff88800e1d3680 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff88800ebaf900 RSP=ffff88800f3ffcd0 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff88800ebafa90 R14=0000000000000001 R15=ffff888016d33968 RIP=ffffffff814c086b 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 00007f4cc51f5900 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=00007ffd2faae000 CR3=000000001a206000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000