syzkaller login: [ 49.832668] BUG: Bad rss-counter state mm:0000000091a1754b type:MM_FILEPAGES val:33 [ 49.834328] BUG: Bad rss-counter state mm:0000000091a1754b type:MM_ANONPAGES val:22 [ 50.013768] ================================================================== [ 50.014874] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.015899] Read of size 8 at addr ffff88800957b058 by task sshd/220 [ 50.016866] [ 50.017106] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.018037] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.019097] Call Trace: [ 50.019440] [ 50.019746] dump_stack_lvl+0x91/0xf0 [ 50.020263] print_report+0xcc/0x620 [ 50.020787] ? __virt_addr_valid+0x102/0x340 [ 50.021375] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.022044] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.022716] kasan_report+0xbe/0xf0 [ 50.023244] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.023930] vma_interval_tree_remove+0xc75/0xec0 [ 50.024591] vma_prepare+0xc54/0x11a0 [ 50.025120] __split_vma+0x5af/0x950 [ 50.025641] ? __pfx___split_vma+0x10/0x10 [ 50.026251] ? find_held_lock+0x2c/0x110 [ 50.026823] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.027443] ? lock_is_held_type+0x9f/0x120 [ 50.028037] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.028709] ? mtree_range_walk+0x632/0x900 [ 50.029317] ? mas_walk+0x5c7/0x7c0 [ 50.029836] do_vmi_munmap+0x1f1/0x2b0 [ 50.030393] mmap_region+0x1f9/0x2660 [ 50.030921] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.031482] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.032262] ? __pfx_lock_acquire+0x10/0x10 [ 50.032853] ? __pfx_mmap_region+0x10/0x10 [ 50.033440] ? security_mmap_addr+0x7d/0xa0 [ 50.034052] ? get_unmapped_area+0x1f5/0x3f0 [ 50.034651] do_mmap+0x854/0xf00 [ 50.035137] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.035685] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.036300] ksys_mmap_pgoff+0x3af/0x500 [ 50.036860] do_syscall_64+0x3f/0x90 [ 50.037382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.038102] RIP: 0033:0x7fc41ba1bd82 [ 50.038610] 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 [ 50.040955] RSP: 002b:00007ffd447fb388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.041956] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc41ba1bd82 [ 50.042895] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc41ae55000 [ 50.043830] RBP: 00007fc41ae55000 R08: 0000000000000009 R09: 0000000000001000 [ 50.044766] R10: 0000000000000812 R11: 0000000000000206 R12: 000056314f740d90 [ 50.045698] R13: 00007ffd447fb3a0 R14: 00007ffd447fb3d0 R15: 00007ffd447fb730 [ 50.046667] [ 50.046987] [ 50.047225] Allocated by task 213: [ 50.047698] kasan_save_stack+0x22/0x50 [ 50.048257] kasan_set_track+0x25/0x30 [ 50.048802] __kasan_slab_alloc+0x59/0x70 [ 50.049379] kmem_cache_alloc+0x16b/0x370 [ 50.049956] vm_area_dup+0x20/0x160 [ 50.050460] __split_vma+0x170/0x950 [ 50.050972] split_vma+0xc6/0x110 [ 50.051450] mprotect_fixup+0x8d2/0xb30 [ 50.052006] do_mprotect_pkey+0x87e/0xd40 [ 50.052581] __x64_sys_mprotect+0x78/0xc0 [ 50.053150] do_syscall_64+0x3f/0x90 [ 50.053669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.054376] [ 50.054612] Freed by task 204: [ 50.055043] kasan_save_stack+0x22/0x50 [ 50.055606] kasan_set_track+0x25/0x30 [ 50.056149] kasan_save_free_info+0x2b/0x50 [ 50.056739] __kasan_slab_free+0x10a/0x190 [ 50.057323] kmem_cache_free+0x10d/0x4d0 [ 50.058100] rcu_core+0x8c8/0x2860 [ 50.058666] __do_softirq+0x1b7/0x7d4 [ 50.059263] [ 50.059528] Last potentially related work creation: [ 50.060265] kasan_save_stack+0x22/0x50 [ 50.060898] __kasan_record_aux_stack+0x8e/0xa0 [ 50.061620] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.062433] remove_vma+0x139/0x170 [ 50.062998] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.063696] do_vmi_munmap+0x1f1/0x2b0 [ 50.064302] __vm_munmap+0x138/0x3a0 [ 50.064890] __x64_sys_munmap+0x59/0x80 [ 50.065505] do_syscall_64+0x3f/0x90 [ 50.066120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.066826] [ 50.067061] Second to last potentially related work creation: [ 50.067805] kasan_save_stack+0x22/0x50 [ 50.068357] __kasan_record_aux_stack+0x8e/0xa0 [ 50.068977] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.069683] remove_vma+0x139/0x170 [ 50.070184] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.070800] do_vmi_munmap+0x1f1/0x2b0 [ 50.071327] mmap_region+0x1f9/0x2660 [ 50.071844] do_mmap+0x854/0xf00 [ 50.072315] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.072846] ksys_mmap_pgoff+0x3af/0x500 [ 50.073387] do_syscall_64+0x3f/0x90 [ 50.073906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.074632] [ 50.074868] The buggy address belongs to the object at ffff88800957b000 [ 50.074868] which belongs to the cache vm_area_struct of size 168 [ 50.076485] The buggy address is located 88 bytes inside of [ 50.076485] freed 168-byte region [ffff88800957b000, ffff88800957b0a8) [ 50.078028] [ 50.078266] The buggy address belongs to the physical page: [ 50.078995] page:0000000081537df5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x957b [ 50.080187] memcg:ffff88800d4b7901 [ 50.080663] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.081366] page_type: 0xffffffff() [ 50.081860] raw: 0100000000000200 ffff88800879fc80 ffffea0000380180 dead000000000004 [ 50.082878] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4b7901 [ 50.083870] page dumped because: kasan: bad access detected [ 50.084594] [ 50.084829] Memory state around the buggy address: [ 50.085460] ffff88800957af00: fa fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb [ 50.086413] ffff88800957af80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 50.087347] >ffff88800957b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.088285] ^ [ 50.089088] ffff88800957b080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 50.090030] ffff88800957b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.090968] ================================================================== [ 50.092045] Disabling lock debugging due to kernel taint [ 52.141249] BUG: Bad rss-counter state mm:000000004c934e30 type:MM_FILEPAGES val:33 [ 52.142261] BUG: Bad rss-counter state mm:000000004c934e30 type:MM_ANONPAGES val:22 [ 52.626255] BUG: Bad rss-counter state mm:00000000974857c6 type:MM_FILEPAGES val:33 [ 52.627463] BUG: Bad rss-counter state mm:00000000974857c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37997' (ECDSA) to the list of known hosts. 2023/06/19 16:45:47 fuzzer started 2023/06/19 16:45:47 dialing manager at localhost:44161 2023/06/19 16:45:47 checking machine... 2023/06/19 16:45:47 checking revisions... [ 53.373768] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:45:47 testing simple program... [ 53.421248] cgroup: Unknown subsys name 'net' [ 53.469812] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:45:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800fde7ac8 RCX=0000000000000001 RDX=1ffff11001fbcf5a RSI=ffffffff816cb76a RDI=ffff88800fde7ad0 RBP=0000000000000000 RSP=ffff88800fde79e0 R8 =0000000000000001 R9 =ffff88800fde7a40 R10=0000000000038001 R11=0000000000020cf8 R12=ffff88800fde7ac8 R13=0000000000000000 R14=ffff888017e11b40 R15=ffff88800dc884c0 RIP=ffffffff813ad46e RFL=00000216 [----AP-] 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 00007fd20521c900 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=00007fd2057d40b0 CR3=000000000cb68000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800c908900 RCX=1ffff11001921125 RDX=0000000000000000 RSI=ffffffff82007f4a RDI=ffff88800c908928 RBP=ffffea00006f4cc0 RSP=ffff888009537068 R8 =0000000000000006 R9 =000000001bd33000 R10=000000001bd32000 R11=0000000000009293 R12=ffffea00006f4cc0 R13=ffff8880095370e8 R14=ffff88800987b4c0 R15=000000001bd33000 RIP=ffffffff82007f63 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 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=00007ffe31143318 CR3=0000000005482000 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=00007f6d43f4151000005653a3879790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000