syzkaller login: [ 76.385904] BUG: Bad rss-counter state mm:00000000167feea8 type:MM_FILEPAGES val:33 [ 76.387387] BUG: Bad rss-counter state mm:00000000167feea8 type:MM_ANONPAGES val:22 [ 76.533981] ================================================================== [ 76.534876] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 76.535810] Read of size 8 at addr ffff88800f0eac20 by task sshd/220 [ 76.536569] [ 76.536785] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 76.537895] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 76.538858] Call Trace: [ 76.539170] [ 76.539454] dump_stack_lvl+0x91/0xf0 [ 76.539957] print_report+0xcc/0x620 [ 76.540439] ? __virt_addr_valid+0x102/0x340 [ 76.540977] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.541588] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.542197] kasan_report+0xbe/0xf0 [ 76.542666] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.543273] vma_interval_tree_remove+0xc75/0xec0 [ 76.543876] vma_prepare+0xc54/0x11a0 [ 76.544351] __split_vma+0x5af/0x950 [ 76.544820] ? __pfx___split_vma+0x10/0x10 [ 76.545340] ? find_held_lock+0x2c/0x110 [ 76.545860] do_vmi_align_munmap+0x2ba/0x11f0 [ 76.546422] ? lock_is_held_type+0x9f/0x120 [ 76.546952] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 76.547559] ? mtree_range_walk+0x632/0x900 [ 76.548128] ? mas_walk+0x5c7/0x7c0 [ 76.548600] do_vmi_munmap+0x1f1/0x2b0 [ 76.549097] mmap_region+0x1f9/0x2660 [ 76.549579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 76.550083] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 76.550787] ? __pfx_lock_acquire+0x10/0x10 [ 76.551310] ? __pfx_mmap_region+0x10/0x10 [ 76.551848] ? security_mmap_addr+0x7d/0xa0 [ 76.552372] ? get_unmapped_area+0x1f5/0x3f0 [ 76.552915] do_mmap+0x854/0xf00 [ 76.553349] vm_mmap_pgoff+0x1a6/0x3a0 [ 76.553844] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 76.554400] ksys_mmap_pgoff+0x3af/0x500 [ 76.554898] do_syscall_64+0x3f/0x90 [ 76.555372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.556033] RIP: 0033:0x7f8602875d82 [ 76.556490] 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 [ 76.558591] RSP: 002b:00007ffe63d2e138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 76.559492] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8602875d82 [ 76.560345] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8601caf000 [ 76.561180] RBP: 00007f8601caf000 R08: 0000000000000009 R09: 0000000000001000 [ 76.562030] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d5c570d90 [ 76.562874] R13: 00007ffe63d2e150 R14: 00007ffe63d2e180 R15: 00007ffe63d2e4e0 [ 76.563743] [ 76.564031] [ 76.564243] Allocated by task 213: [ 76.564668] kasan_save_stack+0x22/0x50 [ 76.565169] kasan_set_track+0x25/0x30 [ 76.565657] __kasan_slab_alloc+0x59/0x70 [ 76.566180] kmem_cache_alloc+0x16b/0x370 [ 76.566690] vm_area_dup+0x20/0x160 [ 76.567144] __split_vma+0x170/0x950 [ 76.567627] split_vma+0xc6/0x110 [ 76.568064] mprotect_fixup+0x8d2/0xb30 [ 76.568561] do_mprotect_pkey+0x87e/0xd40 [ 76.569107] __x64_sys_mprotect+0x78/0xc0 [ 76.569632] do_syscall_64+0x3f/0x90 [ 76.570108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.570756] [ 76.570969] Freed by task 213: [ 76.571361] kasan_save_stack+0x22/0x50 [ 76.571884] kasan_set_track+0x25/0x30 [ 76.572381] kasan_save_free_info+0x2b/0x50 [ 76.572912] __kasan_slab_free+0x10a/0x190 [ 76.573446] kmem_cache_free+0x10d/0x4d0 [ 76.573954] rcu_core+0x8c8/0x2860 [ 76.574399] __do_softirq+0x1b7/0x7d4 [ 76.574884] [ 76.575100] Last potentially related work creation: [ 76.575695] kasan_save_stack+0x22/0x50 [ 76.576203] __kasan_record_aux_stack+0x8e/0xa0 [ 76.576786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 76.577431] remove_vma+0x139/0x170 [ 76.577885] do_vmi_align_munmap+0xd4a/0x11f0 [ 76.578448] do_vmi_munmap+0x1f1/0x2b0 [ 76.578952] __vm_munmap+0x138/0x3a0 [ 76.579436] __x64_sys_munmap+0x59/0x80 [ 76.579973] do_syscall_64+0x3f/0x90 [ 76.580461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.581126] [ 76.581348] The buggy address belongs to the object at ffff88800f0eabc8 [ 76.581348] which belongs to the cache vm_area_struct of size 168 [ 76.582877] The buggy address is located 88 bytes inside of [ 76.582877] freed 168-byte region [ffff88800f0eabc8, ffff88800f0eac70) [ 76.584352] [ 76.584576] The buggy address belongs to the physical page: [ 76.585262] page:000000004b559fec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0ea [ 76.586385] memcg:ffff888015b5f101 [ 76.586826] flags: 0x100000000000200(slab|node=0|zone=1) [ 76.587500] page_type: 0xffffffff() [ 76.587973] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 76.588931] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b5f101 [ 76.589871] page dumped because: kasan: bad access detected [ 76.590560] [ 76.590783] Memory state around the buggy address: [ 76.591383] ffff88800f0eab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 76.592287] ffff88800f0eab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 76.593170] >ffff88800f0eac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 76.594050] ^ [ 76.594599] ffff88800f0eac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 76.595491] ffff88800f0ead00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 76.596382] ================================================================== [ 76.597435] Disabling lock debugging due to kernel taint [ 78.578188] BUG: Bad rss-counter state mm:0000000048b4879c type:MM_FILEPAGES val:33 [ 78.579376] BUG: Bad rss-counter state mm:0000000048b4879c type:MM_ANONPAGES val:22 [ 78.992854] BUG: Bad rss-counter state mm:00000000da2799d7 type:MM_FILEPAGES val:33 [ 78.993890] BUG: Bad rss-counter state mm:00000000da2799d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62765' (ECDSA) to the list of known hosts. 2023/06/19 15:13:41 fuzzer started 2023/06/19 15:13:41 dialing manager at localhost:44161 2023/06/19 15:13:41 checking machine... 2023/06/19 15:13:41 checking revisions... [ 79.808148] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:13:41 testing simple program... [ 79.854951] cgroup: Unknown subsys name 'net' [ 79.933126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:12:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8171aef0 RDX=ffff8880159e9b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f0d7e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007ffcf79f7000 R14=0000000000000000 R15=0000000000000040 RIP=ffffffff814c07e0 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 00007f62950d9900 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=00007ffcf79f7000 CR3=000000000c736000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c2c6e106d371674203206322e302e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f60add386b0 CR3=000000000c4ec000 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=84eb05f411f45880fe440d15e46f2180 XMM02=2c67c8bc2e329bc30000000000120d20 XMM03=fb795ef6d657705600000000001282a0 XMM04=f835d65f51c494f500000000000ae988 XMM05=19e9129bd510f23500000000001383c8 XMM06=21025661f00bbba30000000000137230 XMM07=e042d86d42eb936e0000000000128520 XMM08=1ddf3fdc376033370000000000120d80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000