syzkaller login: [ 37.893252] BUG: Bad rss-counter state mm:00000000b3591167 type:MM_FILEPAGES val:33 [ 37.894627] BUG: Bad rss-counter state mm:00000000b3591167 type:MM_ANONPAGES val:22 [ 38.002097] ================================================================== [ 38.003246] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.004649] Read of size 8 at addr ffff888016e7b140 by task sshd/219 [ 38.005630] [ 38.005902] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.007061] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.008293] Call Trace: [ 38.008688] [ 38.009044] dump_stack_lvl+0x91/0xf0 [ 38.009650] print_report+0xcc/0x620 [ 38.010253] ? __virt_addr_valid+0x102/0x340 [ 38.010925] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.011689] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.012467] kasan_report+0xbe/0xf0 [ 38.013063] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.013831] vma_interval_tree_remove+0xc75/0xec0 [ 38.014574] vma_prepare+0xc54/0x11a0 [ 38.015164] __split_vma+0x5af/0x950 [ 38.015738] ? __pfx___split_vma+0x10/0x10 [ 38.016419] ? find_held_lock+0x2c/0x110 [ 38.017056] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.017683] ? lock_is_held_type+0x9f/0x120 [ 38.018268] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.018935] ? mtree_range_walk+0x632/0x900 [ 38.019551] ? mas_walk+0x5c7/0x7c0 [ 38.020089] do_vmi_munmap+0x1f1/0x2b0 [ 38.020629] mmap_region+0x1f9/0x2660 [ 38.021155] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.021720] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.022510] ? __pfx_lock_acquire+0x10/0x10 [ 38.023092] ? __pfx_mmap_region+0x10/0x10 [ 38.023667] ? security_mmap_addr+0x7d/0xa0 [ 38.024260] ? get_unmapped_area+0x1f5/0x3f0 [ 38.024870] do_mmap+0x854/0xf00 [ 38.025356] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.025894] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.026510] ksys_mmap_pgoff+0x3af/0x500 [ 38.027070] do_syscall_64+0x3f/0x90 [ 38.027597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.028331] RIP: 0033:0x7f05e7610d82 [ 38.028854] 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 [ 38.031213] RSP: 002b:00007fffd3af8838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.032222] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05e7610d82 [ 38.033163] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05e6a4a000 [ 38.034099] RBP: 00007f05e6a4a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.035048] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ad0a65ec0 [ 38.035988] R13: 00007fffd3af8850 R14: 00007fffd3af8880 R15: 00007fffd3af8be0 [ 38.036948] [ 38.037272] [ 38.037513] Allocated by task 212: [ 38.037991] kasan_save_stack+0x22/0x50 [ 38.038547] kasan_set_track+0x25/0x30 [ 38.039083] __kasan_slab_alloc+0x59/0x70 [ 38.039672] kmem_cache_alloc+0x16b/0x370 [ 38.040277] vm_area_dup+0x20/0x160 [ 38.040787] __split_vma+0x170/0x950 [ 38.041297] split_vma+0xc6/0x110 [ 38.041783] mprotect_fixup+0x8d2/0xb30 [ 38.042338] do_mprotect_pkey+0x87e/0xd40 [ 38.042902] __x64_sys_mprotect+0x78/0xc0 [ 38.043477] do_syscall_64+0x3f/0x90 [ 38.044019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.044715] [ 38.044945] Freed by task 212: [ 38.045443] kasan_save_stack+0x22/0x50 [ 38.046002] kasan_set_track+0x25/0x30 [ 38.046554] kasan_save_free_info+0x2b/0x50 [ 38.047140] __kasan_slab_free+0x10a/0x190 [ 38.047731] kmem_cache_free+0x10d/0x4d0 [ 38.048315] rcu_core+0x8c8/0x2860 [ 38.048807] __do_softirq+0x1b7/0x7d4 [ 38.049333] [ 38.049570] Last potentially related work creation: [ 38.050221] kasan_save_stack+0x22/0x50 [ 38.050769] __kasan_record_aux_stack+0x8e/0xa0 [ 38.051400] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.052123] remove_vma+0x139/0x170 [ 38.052621] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.053247] do_vmi_munmap+0x1f1/0x2b0 [ 38.053774] __vm_munmap+0x138/0x3a0 [ 38.054296] __x64_sys_munmap+0x59/0x80 [ 38.054848] do_syscall_64+0x3f/0x90 [ 38.055377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.056107] [ 38.056339] The buggy address belongs to the object at ffff888016e7b0e8 [ 38.056339] which belongs to the cache vm_area_struct of size 168 [ 38.057922] The buggy address is located 88 bytes inside of [ 38.057922] freed 168-byte region [ffff888016e7b0e8, ffff888016e7b190) [ 38.059482] [ 38.059718] The buggy address belongs to the physical page: [ 38.060464] page:00000000937dfa40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e7b [ 38.061679] memcg:ffff8880141b6e01 [ 38.062152] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.062865] page_type: 0xffffffff() [ 38.063364] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.064391] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880141b6e01 [ 38.065398] page dumped because: kasan: bad access detected [ 38.066123] [ 38.066359] Memory state around the buggy address: [ 38.067011] ffff888016e7b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.067990] ffff888016e7b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.068956] >ffff888016e7b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.069918] ^ [ 38.070634] ffff888016e7b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.071574] ffff888016e7b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.072549] ================================================================== [ 38.073627] Disabling lock debugging due to kernel taint [ 40.632615] BUG: Bad rss-counter state mm:000000004adfb392 type:MM_FILEPAGES val:33 [ 40.633605] BUG: Bad rss-counter state mm:000000004adfb392 type:MM_ANONPAGES val:22 [ 41.145207] BUG: Bad rss-counter state mm:00000000491999a5 type:MM_FILEPAGES val:33 [ 41.146395] BUG: Bad rss-counter state mm:00000000491999a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8923' (ECDSA) to the list of known hosts. 2023/06/19 19:54:41 fuzzer started 2023/06/19 19:54:41 dialing manager at localhost:44161 2023/06/19 19:54:41 checking machine... 2023/06/19 19:54:41 checking revisions... [ 41.880580] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:54:41 testing simple program... [ 41.934052] cgroup: Unknown subsys name 'net' [ 41.975081] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:54:34 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=00007f7d3c876450 CR3=000000000ff1c000 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=2030343a34353a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a34353a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f84a9f3cb80 RBX=00007f84a9f3cb7a RCX=0000000000000006 RDX=000000007fffffaa RSI=00007f84a9f3cb7a RDI=00007ffdd3fad8db RBP=00007ffdd3fad500 RSP=00007ffdd3facfb0 R8 =00000000ffffffff R9 =000000000000005b R10=0000558966bb33f0 R11=0000000000000000 R12=00007ffdd3fad520 R13=00007f84a9f3cb58 R14=00007ffdd3fad6a0 R15=00007f84a99a01a0 RIP=00007f84a984a415 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 00007f84a93ec900 00000000 00000000 GS =0000 0000000000000000 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=00007ffdd3faa000 CR3=0000000019a58000 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=25252525252525252525252525252525 XMM01=000000ff0000000000000000000000ff XMM02=00000000000000000000000000000000 XMM03=b86201b6b6728c00322e322e302e3031 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=722073253d6c616e696d726574207325 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000