syzkaller login: [ 73.338251] BUG: Bad rss-counter state mm:000000000b73d087 type:MM_FILEPAGES val:33 [ 73.340535] BUG: Bad rss-counter state mm:000000000b73d087 type:MM_ANONPAGES val:22 [ 73.507979] ================================================================== [ 73.509009] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 73.510048] Read of size 8 at addr ffff88800e3d65c8 by task sshd/221 [ 73.511035] [ 73.511285] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 73.512445] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 73.513545] Call Trace: [ 73.513924] [ 73.514253] dump_stack_lvl+0x91/0xf0 [ 73.514819] print_report+0xcc/0x620 [ 73.515391] ? __virt_addr_valid+0x102/0x340 [ 73.516036] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.516771] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.517484] kasan_report+0xbe/0xf0 [ 73.518043] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.518764] vma_interval_tree_remove+0xc75/0xec0 [ 73.519461] vma_prepare+0xc54/0x11a0 [ 73.520017] __split_vma+0x5af/0x950 [ 73.520572] ? __pfx___split_vma+0x10/0x10 [ 73.521194] ? find_held_lock+0x2c/0x110 [ 73.521806] do_vmi_align_munmap+0x2ba/0x11f0 [ 73.522456] ? lock_is_held_type+0x9f/0x120 [ 73.523082] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 73.523782] ? mtree_range_walk+0x632/0x900 [ 73.524439] ? mas_walk+0x5c7/0x7c0 [ 73.524994] do_vmi_munmap+0x1f1/0x2b0 [ 73.525570] mmap_region+0x1f9/0x2660 [ 73.526122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 73.526718] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 73.527554] ? __pfx_lock_acquire+0x10/0x10 [ 73.528182] ? __pfx_mmap_region+0x10/0x10 [ 73.528809] ? security_mmap_addr+0x7d/0xa0 [ 73.529433] ? get_unmapped_area+0x1f5/0x3f0 [ 73.530073] do_mmap+0x854/0xf00 [ 73.530582] vm_mmap_pgoff+0x1a6/0x3a0 [ 73.531161] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 73.531814] ksys_mmap_pgoff+0x3af/0x500 [ 73.532416] do_syscall_64+0x3f/0x90 [ 73.532970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.533728] RIP: 0033:0x7fca285e0d82 [ 73.534255] 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 [ 73.536748] RSP: 002b:00007ffc2aa93eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 73.537790] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca285e0d82 [ 73.538774] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca27a1a000 [ 73.539776] RBP: 00007fca27a1a000 R08: 0000000000000009 R09: 0000000000001000 [ 73.540782] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c94001df70 [ 73.541758] R13: 00007ffc2aa93ed0 R14: 00007ffc2aa93f00 R15: 00007ffc2aa94260 [ 73.542757] [ 73.543089] [ 73.543338] Allocated by task 214: [ 73.543817] kasan_save_stack+0x22/0x50 [ 73.544396] kasan_set_track+0x25/0x30 [ 73.544944] __kasan_slab_alloc+0x59/0x70 [ 73.545524] kmem_cache_alloc+0x16b/0x370 [ 73.546092] vm_area_dup+0x20/0x160 [ 73.546603] __split_vma+0x170/0x950 [ 73.547125] split_vma+0xc6/0x110 [ 73.547611] mprotect_fixup+0x8d2/0xb30 [ 73.548169] do_mprotect_pkey+0x87e/0xd40 [ 73.548753] __x64_sys_mprotect+0x78/0xc0 [ 73.549327] do_syscall_64+0x3f/0x90 [ 73.549857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.550565] [ 73.550803] Freed by task 214: [ 73.551239] kasan_save_stack+0x22/0x50 [ 73.551824] kasan_set_track+0x25/0x30 [ 73.552491] kasan_save_free_info+0x2b/0x50 [ 73.553088] __kasan_slab_free+0x10a/0x190 [ 73.553683] kmem_cache_free+0x10d/0x4d0 [ 73.554248] rcu_core+0x8c8/0x2860 [ 73.554738] __do_softirq+0x1b7/0x7d4 [ 73.555268] [ 73.555507] Last potentially related work creation: [ 73.556152] kasan_save_stack+0x22/0x50 [ 73.556731] __kasan_record_aux_stack+0x8e/0xa0 [ 73.557371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 73.558078] remove_vma+0x139/0x170 [ 73.558583] do_vmi_align_munmap+0xd4a/0x11f0 [ 73.559205] do_vmi_munmap+0x1f1/0x2b0 [ 73.559754] __vm_munmap+0x138/0x3a0 [ 73.560273] __x64_sys_munmap+0x59/0x80 [ 73.560854] do_syscall_64+0x3f/0x90 [ 73.561403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.562142] [ 73.562395] Second to last potentially related work creation: [ 73.563187] kasan_save_stack+0x22/0x50 [ 73.563767] __kasan_record_aux_stack+0x8e/0xa0 [ 73.564439] __call_rcu_common.constprop.0+0x6a/0xb90 [ 73.565183] remove_vma+0x139/0x170 [ 73.565704] do_vmi_align_munmap+0xd4a/0x11f0 [ 73.566353] do_vmi_munmap+0x1f1/0x2b0 [ 73.566917] mmap_region+0x1f9/0x2660 [ 73.567468] do_mmap+0x854/0xf00 [ 73.567969] vm_mmap_pgoff+0x1a6/0x3a0 [ 73.568564] ksys_mmap_pgoff+0x7d/0x500 [ 73.569134] do_syscall_64+0x3f/0x90 [ 73.569681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.570420] [ 73.570674] The buggy address belongs to the object at ffff88800e3d6570 [ 73.570674] which belongs to the cache vm_area_struct of size 168 [ 73.572388] The buggy address is located 88 bytes inside of [ 73.572388] freed 168-byte region [ffff88800e3d6570, ffff88800e3d6618) [ 73.574008] [ 73.574260] The buggy address belongs to the physical page: [ 73.575021] page:00000000019f3fec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3d6 [ 73.576284] memcg:ffff88800df9c201 [ 73.576845] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 73.577748] page_type: 0xffffffff() [ 73.578328] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 73.579506] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df9c201 [ 73.580703] page dumped because: kasan: bad access detected [ 73.581539] [ 73.581814] Memory state around the buggy address: [ 73.582552] ffff88800e3d6480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 73.583650] ffff88800e3d6500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 73.584728] >ffff88800e3d6580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.585784] ^ [ 73.586614] ffff88800e3d6600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 73.587705] ffff88800e3d6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.588833] ================================================================== [ 73.590076] Disabling lock debugging due to kernel taint [ 75.525043] BUG: Bad rss-counter state mm:000000008c2ab2cc type:MM_FILEPAGES val:33 [ 75.526059] BUG: Bad rss-counter state mm:000000008c2ab2cc type:MM_ANONPAGES val:22 [ 76.004970] BUG: Bad rss-counter state mm:000000008745e9ad type:MM_FILEPAGES val:33 [ 76.006101] BUG: Bad rss-counter state mm:000000008745e9ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34395' (ECDSA) to the list of known hosts. 2023/06/19 22:30:32 fuzzer started 2023/06/19 22:30:32 dialing manager at localhost:44161 2023/06/19 22:30:32 checking machine... 2023/06/19 22:30:32 checking revisions... [ 76.785464] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:30:32 testing simple program... [ 76.835369] cgroup: Unknown subsys name 'net' [ 76.888875] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:29:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ff1d8dba010 CR3=000000000c3e8000 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=72ca86f13365a4b70a4130fe6d042667 XMM02=ec2efd57dc4c00df00000000001237f0 XMM03=5b792e0a8509605c00000000001238c0 XMM04=a26460e6811acb8c00000000000ae988 XMM05=66657e979fbe8c46000000000013be28 XMM06=c291bd5c70af25b9000000000013ab58 XMM07=e042d86d42eb936e0000000000129d48 XMM08=5b792e0a8509605c00000000001238c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100202f4f7 RBX=ffff88801017a788 RCX=1ffff110019f2ddc RDX=dffffc0000000000 RSI=ffff8880188af280 RDI=ffff88801017a7b8 RBP=ffff888010132eb8 RSP=ffff88801834fcd8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880188aed40 R13=0000000000000000 R14=ffff888009a61898 R15=ffff888009a61850 RIP=ffffffff818474fe 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 00007f0dd791c900 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=000055e970bc8954 CR3=000000001a35e000 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