syzkaller login: [ 121.126977] BUG: Bad rss-counter state mm:000000005a27239e type:MM_FILEPAGES val:33 [ 121.127996] BUG: Bad rss-counter state mm:000000005a27239e type:MM_ANONPAGES val:22 [ 121.301043] ================================================================== [ 121.302005] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 121.302934] Read of size 8 at addr ffff88801904aa50 by task sshd/227 [ 121.303701] [ 121.303932] CPU: 0 PID: 227 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 121.305052] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 121.306024] Call Trace: [ 121.306338] [ 121.306644] dump_stack_lvl+0x91/0xf0 [ 121.307137] print_report+0xcc/0x620 [ 121.307613] ? __virt_addr_valid+0x102/0x340 [ 121.308158] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.308772] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.309401] kasan_report+0xbe/0xf0 [ 121.309884] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.310503] vma_interval_tree_remove+0xc75/0xec0 [ 121.311098] vma_prepare+0xc54/0x11a0 [ 121.311576] __split_vma+0x5af/0x950 [ 121.312045] ? __pfx___split_vma+0x10/0x10 [ 121.312569] ? find_held_lock+0x2c/0x110 [ 121.313085] do_vmi_align_munmap+0x2ba/0x11f0 [ 121.313665] ? lock_is_held_type+0x9f/0x120 [ 121.314207] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 121.314809] ? mtree_range_walk+0x632/0x900 [ 121.315355] ? mas_walk+0x5c7/0x7c0 [ 121.315829] do_vmi_munmap+0x1f1/0x2b0 [ 121.316317] mmap_region+0x1f9/0x2660 [ 121.316795] ? vm_mmap_pgoff+0x15c/0x3a0 [ 121.317301] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 121.318022] ? __pfx_lock_acquire+0x10/0x10 [ 121.318544] ? __pfx_mmap_region+0x10/0x10 [ 121.319072] ? security_mmap_addr+0x7d/0xa0 [ 121.319590] ? get_unmapped_area+0x1f5/0x3f0 [ 121.320134] do_mmap+0x854/0xf00 [ 121.320563] vm_mmap_pgoff+0x1a6/0x3a0 [ 121.321051] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 121.321607] ksys_mmap_pgoff+0x3af/0x500 [ 121.322108] do_syscall_64+0x3f/0x90 [ 121.322574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.323215] RIP: 0033:0x7f0473e97d82 [ 121.323664] 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 [ 121.325765] RSP: 002b:00007ffd2671f0d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 121.326657] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0473e97d82 [ 121.327499] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04732d1000 [ 121.328353] RBP: 00007f04732d1000 R08: 0000000000000009 R09: 0000000000001000 [ 121.329188] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648c01b3ec0 [ 121.330050] R13: 00007ffd2671f0f0 R14: 00007ffd2671f120 R15: 00007ffd2671f480 [ 121.330898] [ 121.331192] [ 121.331405] Allocated by task 220: [ 121.331832] kasan_save_stack+0x22/0x50 [ 121.332332] kasan_set_track+0x25/0x30 [ 121.332819] __kasan_slab_alloc+0x59/0x70 [ 121.333340] kmem_cache_alloc+0x16b/0x370 [ 121.333855] vm_area_dup+0x20/0x160 [ 121.334306] __split_vma+0x170/0x950 [ 121.334764] split_vma+0xc6/0x110 [ 121.335204] mprotect_fixup+0x8d2/0xb30 [ 121.335704] do_mprotect_pkey+0x87e/0xd40 [ 121.336235] __x64_sys_mprotect+0x78/0xc0 [ 121.336772] do_syscall_64+0x3f/0x90 [ 121.337258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.337938] [ 121.338155] Freed by task 220: [ 121.338556] kasan_save_stack+0x22/0x50 [ 121.339075] kasan_set_track+0x25/0x30 [ 121.339579] kasan_save_free_info+0x2b/0x50 [ 121.340132] __kasan_slab_free+0x10a/0x190 [ 121.340680] kmem_cache_free+0x10d/0x4d0 [ 121.341199] rcu_core+0x8c8/0x2860 [ 121.341659] __do_softirq+0x1b7/0x7d4 [ 121.342149] [ 121.342368] Last potentially related work creation: [ 121.342977] kasan_save_stack+0x22/0x50 [ 121.343491] __kasan_record_aux_stack+0x8e/0xa0 [ 121.344086] __call_rcu_common.constprop.0+0x6a/0xb90 [ 121.344746] remove_vma+0x139/0x170 [ 121.345207] do_vmi_align_munmap+0xd4a/0x11f0 [ 121.345786] do_vmi_munmap+0x1f1/0x2b0 [ 121.346284] __vm_munmap+0x138/0x3a0 [ 121.346766] __x64_sys_munmap+0x59/0x80 [ 121.347278] do_syscall_64+0x3f/0x90 [ 121.347766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.348428] [ 121.348646] The buggy address belongs to the object at ffff88801904a9f8 [ 121.348646] which belongs to the cache vm_area_struct of size 168 [ 121.350178] The buggy address is located 88 bytes inside of [ 121.350178] freed 168-byte region [ffff88801904a9f8, ffff88801904aaa0) [ 121.351630] [ 121.351850] The buggy address belongs to the physical page: [ 121.352533] page:00000000089e2c38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1904a [ 121.353689] memcg:ffff88800ce56301 [ 121.354131] flags: 0x100000000000200(slab|node=0|zone=1) [ 121.354797] page_type: 0xffffffff() [ 121.355263] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 121.356212] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce56301 [ 121.357164] page dumped because: kasan: bad access detected [ 121.357856] [ 121.358079] Memory state around the buggy address: [ 121.358692] ffff88801904a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 121.359558] ffff88801904a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 121.360429] >ffff88801904aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 121.361282] ^ [ 121.362000] ffff88801904aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 121.362834] ffff88801904ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 121.363668] ================================================================== [ 121.364663] Disabling lock debugging due to kernel taint [ 123.395718] BUG: Bad rss-counter state mm:00000000947259ef type:MM_FILEPAGES val:33 [ 123.396932] BUG: Bad rss-counter state mm:00000000947259ef type:MM_ANONPAGES val:22 [ 123.796950] BUG: Bad rss-counter state mm:0000000000d0ee2f type:MM_FILEPAGES val:33 [ 123.797875] BUG: Bad rss-counter state mm:0000000000d0ee2f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15896' (ECDSA) to the list of known hosts. 2023/06/19 22:59:57 fuzzer started 2023/06/19 22:59:57 dialing manager at localhost:44161 2023/06/19 22:59:57 checking machine... 2023/06/19 22:59:57 checking revisions... [ 124.556431] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:59:57 testing simple program... [ 124.602245] cgroup: Unknown subsys name 'net' [ 124.640702] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:58:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8450b05e RCX=ffffffff8609fb01 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8450b05e RBP=ffffffff8450b05e RSP=ffff88806ce09a48 R8 =ffffffff8609fb08 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=0000000000000001 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888009a65c60 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 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=00007f4cd52208e0 CR3=000000000e0ca000 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=2036353a39353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a39353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f7c0558 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff8880102651c0 RSI=ffffffff83c5ef28 RDI=ffff88800e26cd58 RBP=ffff88800e26cc00 RSP=ffff88801610f588 R8 =0000000000000004 R9 =000000000000000c R10=000000000000000c R11=00002e9600002cbd R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000000 R15=000000000000000c RIP=ffffffff83c5ef4b 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 00007ff070270900 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=00007ffd8c4ee000 CR3=000000000d63a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000