syzkaller login: [ 38.938807] BUG: Bad rss-counter state mm:00000000fb7c3440 type:MM_FILEPAGES val:33 [ 38.940070] BUG: Bad rss-counter state mm:00000000fb7c3440 type:MM_ANONPAGES val:22 [ 38.986684] ================================================================== [ 38.987686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.988626] Read of size 8 at addr ffff88800f12cd08 by task sshd/219 [ 38.989400] [ 38.989619] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.990689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.991666] Call Trace: [ 38.991982] [ 38.992279] dump_stack_lvl+0x91/0xf0 [ 38.992768] print_report+0xcc/0x620 [ 38.993256] ? __virt_addr_valid+0x102/0x340 [ 38.993812] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.994426] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.995064] kasan_report+0xbe/0xf0 [ 38.995543] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.996163] vma_interval_tree_remove+0xc75/0xec0 [ 38.996766] vma_prepare+0xc54/0x11a0 [ 38.997246] __split_vma+0x5af/0x950 [ 38.997724] ? __pfx___split_vma+0x10/0x10 [ 38.998256] ? find_held_lock+0x2c/0x110 [ 38.998798] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.999373] ? lock_is_held_type+0x9f/0x120 [ 38.999919] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.000526] ? mtree_range_walk+0x632/0x900 [ 39.001080] ? mas_walk+0x5c7/0x7c0 [ 39.001571] do_vmi_munmap+0x1f1/0x2b0 [ 39.002067] mmap_region+0x1f9/0x2660 [ 39.002552] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.003084] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.003799] ? __pfx_lock_acquire+0x10/0x10 [ 39.004335] ? __pfx_mmap_region+0x10/0x10 [ 39.004867] ? security_mmap_addr+0x7d/0xa0 [ 39.005406] ? get_unmapped_area+0x1f5/0x3f0 [ 39.005950] do_mmap+0x854/0xf00 [ 39.006390] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.006910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.007480] ksys_mmap_pgoff+0x3af/0x500 [ 39.008006] do_syscall_64+0x3f/0x90 [ 39.008488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.009131] RIP: 0033:0x7fca073f4d82 [ 39.009591] 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 [ 39.011801] RSP: 002b:00007ffc13eb7378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.012750] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca073f4d82 [ 39.013631] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca0682e000 [ 39.014518] RBP: 00007fca0682e000 R08: 0000000000000009 R09: 0000000000001000 [ 39.015425] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee3124db20 [ 39.016311] R13: 00007ffc13eb7390 R14: 00007ffc13eb73c0 R15: 00007ffc13eb7720 [ 39.017206] [ 39.017509] [ 39.017728] Allocated by task 212: [ 39.018174] kasan_save_stack+0x22/0x50 [ 39.018708] kasan_set_track+0x25/0x30 [ 39.019224] __kasan_slab_alloc+0x59/0x70 [ 39.019767] kmem_cache_alloc+0x16b/0x370 [ 39.020306] vm_area_dup+0x20/0x160 [ 39.020779] __split_vma+0x170/0x950 [ 39.021269] split_vma+0xc6/0x110 [ 39.021726] mprotect_fixup+0x8d2/0xb30 [ 39.022245] do_mprotect_pkey+0x87e/0xd40 [ 39.022796] __x64_sys_mprotect+0x78/0xc0 [ 39.023335] do_syscall_64+0x3f/0x90 [ 39.023830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.024501] [ 39.024729] Freed by task 212: [ 39.025139] kasan_save_stack+0x22/0x50 [ 39.025655] kasan_set_track+0x25/0x30 [ 39.026165] kasan_save_free_info+0x2b/0x50 [ 39.026749] __kasan_slab_free+0x10a/0x190 [ 39.027303] kmem_cache_free+0x10d/0x4d0 [ 39.027829] rcu_core+0x8c8/0x2860 [ 39.028291] __do_softirq+0x1b7/0x7d4 [ 39.028790] [ 39.029012] Last potentially related work creation: [ 39.029634] kasan_save_stack+0x22/0x50 [ 39.030159] __kasan_record_aux_stack+0x8e/0xa0 [ 39.030765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.031433] remove_vma+0x139/0x170 [ 39.031903] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.032482] do_vmi_munmap+0x1f1/0x2b0 [ 39.032991] __vm_munmap+0x138/0x3a0 [ 39.033480] __x64_sys_munmap+0x59/0x80 [ 39.034000] do_syscall_64+0x3f/0x90 [ 39.034490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.035177] [ 39.035404] Second to last potentially related work creation: [ 39.036117] kasan_save_stack+0x22/0x50 [ 39.036636] __kasan_record_aux_stack+0x8e/0xa0 [ 39.037233] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.037901] remove_vma+0x139/0x170 [ 39.038378] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.038976] do_vmi_munmap+0x1f1/0x2b0 [ 39.039491] __vm_munmap+0x138/0x3a0 [ 39.039971] __x64_sys_munmap+0x59/0x80 [ 39.040489] do_syscall_64+0x3f/0x90 [ 39.040986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.041656] [ 39.041876] The buggy address belongs to the object at ffff88800f12ccb0 [ 39.041876] which belongs to the cache vm_area_struct of size 168 [ 39.043414] The buggy address is located 88 bytes inside of [ 39.043414] freed 168-byte region [ffff88800f12ccb0, ffff88800f12cd58) [ 39.044869] [ 39.045095] The buggy address belongs to the physical page: [ 39.045788] page:00000000749c6812 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf12c [ 39.046927] memcg:ffff8880096f8e01 [ 39.047366] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.048046] page_type: 0xffffffff() [ 39.048522] raw: 0100000000000200 ffff8880087a0c80 ffffea00003fc200 dead000000000006 [ 39.049483] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096f8e01 [ 39.050431] page dumped because: kasan: bad access detected [ 39.051147] [ 39.051372] Memory state around the buggy address: [ 39.051978] ffff88800f12cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.052884] ffff88800f12cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.053785] >ffff88800f12cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.054691] ^ [ 39.055147] ffff88800f12cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.056039] ffff88800f12ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.056929] ================================================================== [ 39.058605] Disabling lock debugging due to kernel taint [ 41.849757] BUG: Bad rss-counter state mm:0000000034205790 type:MM_FILEPAGES val:33 [ 41.850909] BUG: Bad rss-counter state mm:0000000034205790 type:MM_ANONPAGES val:22 [ 42.329303] BUG: Bad rss-counter state mm:0000000066f470b6 type:MM_FILEPAGES val:33 [ 42.330569] BUG: Bad rss-counter state mm:0000000066f470b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4553' (ECDSA) to the list of known hosts. 2023/06/20 13:23:19 fuzzer started 2023/06/20 13:23:19 dialing manager at localhost:36067 2023/06/20 13:23:19 checking machine... 2023/06/20 13:23:19 checking revisions... [ 43.106820] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:23:19 testing simple program... [ 43.162142] cgroup: Unknown subsys name 'net' [ 43.221007] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:23:19 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff863b3501 RDX=1ffff11002bf2f25 RSI=ffffffff8450cc7f RDI=ffff888015f97928 RBP=ffff888015f979c0 RSP=ffff888015f97900 R8 =ffffffff863b3588 R9 =ffff888015f97968 R10=0000000000038001 R11=000000000008a96a R12=ffff888015f979f0 R13=0000000000000000 R14=ffff888018c53680 R15=ffff888015f97928 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007f1a78cc2900 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=00007fff8c711000 CR3=000000000da32000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f79b8989020 CR3=000000000d56c000 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=500a5904e9df8fa3e24baab1174f845a XMM02=000000000011b6f0eff9b2d0a8fce9cb XMM03=000000000011b7c02c67c8bc2e329bc3 XMM04=26645c4f97a88ad700000000000ae988 XMM05=42ead5a94882149200000000001348d0 XMM06=4fda316b135da52b0000000000133970 XMM07=e042d86d42eb936e00000000001227e0 XMM08=edefefe53265015f000000000011b7c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000