syzkaller login: [ 31.081408] BUG: Bad rss-counter state mm:0000000004d34439 type:MM_FILEPAGES val:33 [ 31.083083] BUG: Bad rss-counter state mm:0000000004d34439 type:MM_ANONPAGES val:22 [ 31.261154] ================================================================== [ 31.262064] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.263009] Read of size 8 at addr ffff88801a1cfc20 by task sshd/219 [ 31.263945] [ 31.264171] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.265087] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.266108] Call Trace: [ 31.266438] [ 31.266753] dump_stack_lvl+0x91/0xf0 [ 31.267247] print_report+0xcc/0x620 [ 31.267734] ? __virt_addr_valid+0x102/0x340 [ 31.268311] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.268935] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.269578] kasan_report+0xbe/0xf0 [ 31.270055] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.270691] vma_interval_tree_remove+0xc75/0xec0 [ 31.271349] vma_prepare+0xc54/0x11a0 [ 31.271966] __split_vma+0x5af/0x950 [ 31.272612] ? __pfx___split_vma+0x10/0x10 [ 31.273296] ? find_held_lock+0x2c/0x110 [ 31.273956] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.274637] ? lock_is_held_type+0x9f/0x120 [ 31.275296] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.276028] ? mtree_range_walk+0x632/0x900 [ 31.276690] ? mas_walk+0x5c7/0x7c0 [ 31.277283] do_vmi_munmap+0x1f1/0x2b0 [ 31.277870] mmap_region+0x1f9/0x2660 [ 31.278453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.279070] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.279935] ? __pfx_lock_acquire+0x10/0x10 [ 31.280582] ? __pfx_mmap_region+0x10/0x10 [ 31.281286] ? security_mmap_addr+0x7d/0xa0 [ 31.281982] ? get_unmapped_area+0x1f5/0x3f0 [ 31.282650] do_mmap+0x854/0xf00 [ 31.283181] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.283782] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.284467] ksys_mmap_pgoff+0x3af/0x500 [ 31.285098] do_syscall_64+0x3f/0x90 [ 31.285668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.286449] RIP: 0033:0x7fc6a0c99d82 [ 31.287009] 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 [ 31.289674] RSP: 002b:00007ffc777c8fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.290792] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6a0c99d82 [ 31.291834] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6a00d3000 [ 31.292877] RBP: 00007fc6a00d3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.293929] R10: 0000000000000812 R11: 0000000000000206 R12: 00005631e8efaf70 [ 31.294972] R13: 00007ffc777c8fe0 R14: 00007ffc777c9010 R15: 00007ffc777c9370 [ 31.296025] [ 31.296405] [ 31.296693] Allocated by task 212: [ 31.297271] kasan_save_stack+0x22/0x50 [ 31.297903] kasan_set_track+0x25/0x30 [ 31.298511] __kasan_slab_alloc+0x59/0x70 [ 31.299154] kmem_cache_alloc+0x16b/0x370 [ 31.299795] vm_area_dup+0x20/0x160 [ 31.300362] __split_vma+0x170/0x950 [ 31.300942] split_vma+0xc6/0x110 [ 31.301505] mprotect_fixup+0x8d2/0xb30 [ 31.302126] do_mprotect_pkey+0x87e/0xd40 [ 31.302770] __x64_sys_mprotect+0x78/0xc0 [ 31.303413] do_syscall_64+0x3f/0x90 [ 31.303999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.304919] [ 31.305249] Freed by task 19: [ 31.305749] kasan_save_stack+0x22/0x50 [ 31.306374] kasan_set_track+0x25/0x30 [ 31.306988] kasan_save_free_info+0x2b/0x50 [ 31.307651] __kasan_slab_free+0x10a/0x190 [ 31.308310] kmem_cache_free+0x10d/0x4d0 [ 31.308946] rcu_core+0x8c8/0x2860 [ 31.309459] __do_softirq+0x1b7/0x7d4 [ 31.309926] [ 31.310144] Last potentially related work creation: [ 31.310743] kasan_save_stack+0x22/0x50 [ 31.311249] __kasan_record_aux_stack+0x8e/0xa0 [ 31.311829] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.312470] remove_vma+0x139/0x170 [ 31.312973] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.313610] do_vmi_munmap+0x1f1/0x2b0 [ 31.314096] __vm_munmap+0x138/0x3a0 [ 31.314562] __x64_sys_munmap+0x59/0x80 [ 31.315055] do_syscall_64+0x3f/0x90 [ 31.315531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.316172] [ 31.316392] The buggy address belongs to the object at ffff88801a1cfbc8 [ 31.316392] which belongs to the cache vm_area_struct of size 168 [ 31.317895] The buggy address is located 88 bytes inside of [ 31.317895] freed 168-byte region [ffff88801a1cfbc8, ffff88801a1cfc70) [ 31.319331] [ 31.319547] The buggy address belongs to the physical page: [ 31.320224] page:00000000ab79bc9f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1cf [ 31.321445] memcg:ffff888018e73d01 [ 31.321874] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.322525] page_type: 0xffffffff() [ 31.322981] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.323899] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e73d01 [ 31.324815] page dumped because: kasan: bad access detected [ 31.325494] [ 31.325709] Memory state around the buggy address: [ 31.326302] ffff88801a1cfb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.327169] ffff88801a1cfb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.328036] >ffff88801a1cfc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.328978] ^ [ 31.329576] ffff88801a1cfc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.330478] ffff88801a1cfd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.331404] ================================================================== [ 31.332424] Disabling lock debugging due to kernel taint [ 33.335460] BUG: Bad rss-counter state mm:0000000068b6301e type:MM_FILEPAGES val:33 [ 33.336473] BUG: Bad rss-counter state mm:0000000068b6301e type:MM_ANONPAGES val:22 [ 33.845656] BUG: Bad rss-counter state mm:00000000a86a4912 type:MM_FILEPAGES val:33 [ 33.847243] BUG: Bad rss-counter state mm:00000000a86a4912 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21596' (ECDSA) to the list of known hosts. 2023/06/19 19:01:03 fuzzer started 2023/06/19 19:01:03 dialing manager at localhost:44161 2023/06/19 19:01:03 checking machine... 2023/06/19 19:01:03 checking revisions... [ 34.564499] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:01:03 testing simple program... [ 34.610328] cgroup: Unknown subsys name 'net' [ 34.649340] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:01:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fe1bc006c40 RCX=00000000000000a7 RDX=0000000000000000 RSI=0000000000000000 RDI=00007fe1bc006c58 RBP=00007fe1bc006c40 RSP=00007fe1c38da730 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000286 R12=00007fe1c38da8d0 R13=00007fe1bc006c40 R14=000055f9b8796ec0 R15=0000000000000000 RIP=000055f9b8727aa5 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe1c38db700 00000000 00000000 GS =0000 0000000000000000 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=00007ffc7308b8b8 CR3=000000000c588000 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=2033303a31303a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a31303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019ef9228 RBX=ffff88800ed6a198 RCX=1ffff11001b26790 RDX=dffffc0000000000 RSI=ffff888019ef94c8 RDI=ffff88800ed6a1c8 RBP=ffff88800e81f538 RSP=ffff88800f2a7ca8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888019ef9450 R13=0000000000000000 R14=ffff888017e02178 R15=ffff888017e02130 RIP=ffffffff81847508 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 00007f52c1130900 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=00007ffd3c2a8000 CR3=0000000015f84000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000