syzkaller login: [ 35.547013] BUG: Bad rss-counter state mm:00000000eea9bcb4 type:MM_FILEPAGES val:33 [ 35.548934] BUG: Bad rss-counter state mm:00000000eea9bcb4 type:MM_ANONPAGES val:22 [ 35.714626] ================================================================== [ 35.715946] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.717296] Read of size 8 at addr ffff88800f2cb058 by task sshd/220 [ 35.718528] [ 35.718851] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.719952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.721140] Call Trace: [ 35.721529] [ 35.721880] dump_stack_lvl+0x91/0xf0 [ 35.722461] print_report+0xcc/0x620 [ 35.723042] ? __virt_addr_valid+0x102/0x340 [ 35.723707] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.724477] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.725218] kasan_report+0xbe/0xf0 [ 35.725783] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.726529] vma_interval_tree_remove+0xc75/0xec0 [ 35.727259] vma_prepare+0xc54/0x11a0 [ 35.727847] __split_vma+0x5af/0x950 [ 35.728415] ? __pfx___split_vma+0x10/0x10 [ 35.729042] ? find_held_lock+0x2c/0x110 [ 35.729664] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.730344] ? lock_is_held_type+0x9f/0x120 [ 35.730988] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.731722] ? mtree_range_walk+0x632/0x900 [ 35.732403] ? mas_walk+0x5c7/0x7c0 [ 35.732963] do_vmi_munmap+0x1f1/0x2b0 [ 35.733550] mmap_region+0x1f9/0x2660 [ 35.734125] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.734736] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.735597] ? __pfx_lock_acquire+0x10/0x10 [ 35.736247] ? __pfx_mmap_region+0x10/0x10 [ 35.736888] ? security_mmap_addr+0x7d/0xa0 [ 35.737530] ? get_unmapped_area+0x1f5/0x3f0 [ 35.738196] do_mmap+0x854/0xf00 [ 35.738727] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.739319] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.740015] ksys_mmap_pgoff+0x3af/0x500 [ 35.740624] do_syscall_64+0x3f/0x90 [ 35.741199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.741974] RIP: 0033:0x7fb7ddaebd82 [ 35.742527] 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 [ 35.745090] RSP: 002b:00007fff184eae98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.746181] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7ddaebd82 [ 35.747200] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7dcf25000 [ 35.748236] RBP: 00007fb7dcf25000 R08: 0000000000000009 R09: 0000000000001000 [ 35.749255] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641481b2ec0 [ 35.750269] R13: 00007fff184eaeb0 R14: 00007fff184eaee0 R15: 00007fff184eb240 [ 35.751297] [ 35.751647] [ 35.751927] Allocated by task 213: [ 35.752445] kasan_save_stack+0x22/0x50 [ 35.753047] kasan_set_track+0x25/0x30 [ 35.753637] __kasan_slab_alloc+0x59/0x70 [ 35.754262] kmem_cache_alloc+0x16b/0x370 [ 35.754880] vm_area_dup+0x20/0x160 [ 35.755434] __split_vma+0x170/0x950 [ 35.755999] split_vma+0xc6/0x110 [ 35.756521] mprotect_fixup+0x8d2/0xb30 [ 35.757118] do_mprotect_pkey+0x87e/0xd40 [ 35.757735] __x64_sys_mprotect+0x78/0xc0 [ 35.758354] do_syscall_64+0x3f/0x90 [ 35.758963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.759728] [ 35.760036] Freed by task 0: [ 35.760490] kasan_save_stack+0x22/0x50 [ 35.761135] kasan_set_track+0x25/0x30 [ 35.761668] kasan_save_free_info+0x2b/0x50 [ 35.762313] __kasan_slab_free+0x10a/0x190 [ 35.762949] kmem_cache_free+0x10d/0x4d0 [ 35.763552] rcu_core+0x8c8/0x2860 [ 35.764099] __do_softirq+0x1b7/0x7d4 [ 35.764669] [ 35.764923] Last potentially related work creation: [ 35.765639] kasan_save_stack+0x22/0x50 [ 35.766253] __kasan_record_aux_stack+0x8e/0xa0 [ 35.766944] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.767708] remove_vma+0x139/0x170 [ 35.768198] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.768735] do_vmi_munmap+0x1f1/0x2b0 [ 35.769193] __vm_munmap+0x138/0x3a0 [ 35.769636] __x64_sys_munmap+0x59/0x80 [ 35.770113] do_syscall_64+0x3f/0x90 [ 35.770563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.771172] [ 35.771377] The buggy address belongs to the object at ffff88800f2cb000 [ 35.771377] which belongs to the cache vm_area_struct of size 168 [ 35.772761] The buggy address is located 88 bytes inside of [ 35.772761] freed 168-byte region [ffff88800f2cb000, ffff88800f2cb0a8) [ 35.774074] [ 35.774279] The buggy address belongs to the physical page: [ 35.774894] page:000000005c864cde refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2cb [ 35.775912] memcg:ffff88800df7b901 [ 35.776319] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.776981] page_type: 0xffffffff() [ 35.777407] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 35.778277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df7b901 [ 35.779129] page dumped because: kasan: bad access detected [ 35.779750] [ 35.779982] Memory state around the buggy address: [ 35.780550] ffff88800f2caf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 35.781390] ffff88800f2caf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.782235] >ffff88800f2cb000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.783053] ^ [ 35.783758] ffff88800f2cb080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.784600] ffff88800f2cb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.785431] ================================================================== [ 35.786313] Disabling lock debugging due to kernel taint [ 38.112291] BUG: Bad rss-counter state mm:000000003501f828 type:MM_FILEPAGES val:33 [ 38.113283] BUG: Bad rss-counter state mm:000000003501f828 type:MM_ANONPAGES val:22 [ 38.580320] BUG: Bad rss-counter state mm:000000004a2393ca type:MM_FILEPAGES val:33 [ 38.581489] BUG: Bad rss-counter state mm:000000004a2393ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25370' (ECDSA) to the list of known hosts. 2023/06/20 01:04:07 fuzzer started 2023/06/20 01:04:07 dialing manager at localhost:44161 2023/06/20 01:04:07 checking machine... 2023/06/20 01:04:07 checking revisions... [ 39.333176] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:04:07 testing simple program... [ 39.381399] cgroup: Unknown subsys name 'net' [ 39.438437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:04:02 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800c956a40 RCX=0000000000000000 RDX=ffffffff81eeb050 RSI=ffff88800c956a40 RDI=ffff888008441500 RBP=ffff888016fdf8b0 RSP=ffff888016fdf870 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008441500 R13=ffffea0000325580 R14=ffffffff81eeb050 R15=1ffff11002dfbf1d RIP=ffffffff8180c7db 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 00007f61438db700 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=00007ff9cf66f0b0 CR3=000000000da96000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036303a3430 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323933 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf39500 RCX=ffffffff812e00e5 RDX=1ffff1100d9e72a2 RSI=0000000000000004 RDI=ffff88806cf09e30 RBP=ffff88806cf09f50 RSP=ffff88806cf09ea8 R8 =0000000000000001 R9 =ffffed100d9e13c6 R10=0000000000000003 R11=ffff88806cf09ff8 R12=ffff88806cf39500 R13=0000000000000007 R14=0000000000000280 R15=0000000000000007 RIP=ffffffff8125863d 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=00007f947a5f6000 CR3=000000000ef54000 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=9f579f5298fa47afa744f97261c657b6 XMM02=000000000011d468eff9b2d0a8fce9cb XMM03=000000000011d5382c67c8bc2e329bc3 XMM04=c63ea63caa793e5f00000000000ae988 XMM05=19e9129bd510f2350000000000133750 XMM06=6e744cebedd5789b0000000000132928 XMM07=e042d86d42eb936e0000000000124150 XMM08=241009734827c71e000000000011d538 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000