syzkaller login: [ 31.461045] BUG: Bad rss-counter state mm:00000000b66b7caf type:MM_FILEPAGES val:33 [ 31.463041] BUG: Bad rss-counter state mm:00000000b66b7caf type:MM_ANONPAGES val:22 [ 31.629803] ================================================================== [ 31.630729] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.631671] Read of size 8 at addr ffff88800ec84d08 by task sshd/221 [ 31.632549] [ 31.632765] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.633645] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.634662] Call Trace: [ 31.634986] [ 31.635277] dump_stack_lvl+0x91/0xf0 [ 31.635769] print_report+0xcc/0x620 [ 31.636253] ? __virt_addr_valid+0x102/0x340 [ 31.636800] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.637444] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.638065] kasan_report+0xbe/0xf0 [ 31.638547] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.639178] vma_interval_tree_remove+0xc75/0xec0 [ 31.639773] vma_prepare+0xc54/0x11a0 [ 31.640256] __split_vma+0x5af/0x950 [ 31.640728] ? __pfx___split_vma+0x10/0x10 [ 31.641267] ? find_held_lock+0x2c/0x110 [ 31.641787] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.642351] ? lock_is_held_type+0x9f/0x120 [ 31.642884] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.643493] ? mtree_range_walk+0x632/0x900 [ 31.644044] ? mas_walk+0x5c7/0x7c0 [ 31.644514] do_vmi_munmap+0x1f1/0x2b0 [ 31.645017] mmap_region+0x1f9/0x2660 [ 31.645502] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.646011] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.646724] ? __pfx_lock_acquire+0x10/0x10 [ 31.647267] ? __pfx_mmap_region+0x10/0x10 [ 31.647796] ? security_mmap_addr+0x7d/0xa0 [ 31.648327] ? get_unmapped_area+0x1f5/0x3f0 [ 31.648875] do_mmap+0x854/0xf00 [ 31.649335] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.649834] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.650398] ksys_mmap_pgoff+0x3af/0x500 [ 31.650905] do_syscall_64+0x3f/0x90 [ 31.651389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.652036] RIP: 0033:0x7f9a8397ad82 [ 31.652494] 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 [ 31.654623] RSP: 002b:00007fffadd74558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.655521] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a8397ad82 [ 31.656367] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a82db4000 [ 31.657222] RBP: 00007f9a82db4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.658063] R10: 0000000000000812 R11: 0000000000000206 R12: 000056016da0ed90 [ 31.658918] R13: 00007fffadd74570 R14: 00007fffadd745a0 R15: 00007fffadd74900 [ 31.659765] [ 31.660062] [ 31.660278] Allocated by task 214: [ 31.660712] kasan_save_stack+0x22/0x50 [ 31.661238] kasan_set_track+0x25/0x30 [ 31.661733] __kasan_slab_alloc+0x59/0x70 [ 31.662262] kmem_cache_alloc+0x16b/0x370 [ 31.662782] vm_area_dup+0x20/0x160 [ 31.663246] __split_vma+0x170/0x950 [ 31.663713] split_vma+0xc6/0x110 [ 31.664157] mprotect_fixup+0x8d2/0xb30 [ 31.664667] do_mprotect_pkey+0x87e/0xd40 [ 31.665201] __x64_sys_mprotect+0x78/0xc0 [ 31.665726] do_syscall_64+0x3f/0x90 [ 31.666205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.666850] [ 31.667070] Freed by task 214: [ 31.667464] kasan_save_stack+0x22/0x50 [ 31.667976] kasan_set_track+0x25/0x30 [ 31.668481] kasan_save_free_info+0x2b/0x50 [ 31.669035] __kasan_slab_free+0x10a/0x190 [ 31.669577] kmem_cache_free+0x10d/0x4d0 [ 31.670094] rcu_core+0x8c8/0x2860 [ 31.670541] __do_softirq+0x1b7/0x7d4 [ 31.671028] [ 31.671245] Last potentially related work creation: [ 31.671832] kasan_save_stack+0x22/0x50 [ 31.672331] __kasan_record_aux_stack+0x8e/0xa0 [ 31.672911] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.673568] remove_vma+0x139/0x170 [ 31.674026] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.674587] do_vmi_munmap+0x1f1/0x2b0 [ 31.675084] __vm_munmap+0x138/0x3a0 [ 31.675557] __x64_sys_munmap+0x59/0x80 [ 31.676064] do_syscall_64+0x3f/0x90 [ 31.676543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.677197] [ 31.677414] The buggy address belongs to the object at ffff88800ec84cb0 [ 31.677414] which belongs to the cache vm_area_struct of size 168 [ 31.678895] The buggy address is located 88 bytes inside of [ 31.678895] freed 168-byte region [ffff88800ec84cb0, ffff88800ec84d58) [ 31.680319] [ 31.680541] The buggy address belongs to the physical page: [ 31.681222] page:00000000f0170d48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec84 [ 31.682310] memcg:ffff88800e587301 [ 31.682739] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.683406] page_type: 0xffffffff() [ 31.683879] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.684798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e587301 [ 31.685719] page dumped because: kasan: bad access detected [ 31.686380] [ 31.686600] Memory state around the buggy address: [ 31.687183] ffff88800ec84c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.688047] ffff88800ec84c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.688915] >ffff88800ec84d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.689792] ^ [ 31.690230] ffff88800ec84d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.691087] ffff88800ec84e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.691937] ================================================================== [ 31.692903] Disabling lock debugging due to kernel taint [ 33.871103] BUG: Bad rss-counter state mm:00000000efd8621c type:MM_FILEPAGES val:33 [ 33.872265] BUG: Bad rss-counter state mm:00000000efd8621c type:MM_ANONPAGES val:22 [ 34.304035] BUG: Bad rss-counter state mm:00000000a152d6f5 type:MM_FILEPAGES val:33 [ 34.305212] BUG: Bad rss-counter state mm:00000000a152d6f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17417' (ECDSA) to the list of known hosts. 2023/06/19 15:38:38 fuzzer started 2023/06/19 15:38:38 dialing manager at localhost:44161 2023/06/19 15:38:38 checking machine... 2023/06/19 15:38:38 checking revisions... [ 35.038196] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:38:38 testing simple program... [ 35.098434] cgroup: Unknown subsys name 'net' [ 35.151762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:38:38 Registers: info registers vcpu 0 RAX=ffffea00003ef0c0 RBX=ffff88800fbc3390 RCX=ffffea0000000000 RDX=ffff88800844f780 RSI=ffffffff813782a8 RDI=ffff88800844f780 RBP=ffff888008d7fd38 RSP=ffff888008d7fd10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff88800844f780 R13=ffff88808fbc3390 R14=ffffffff813782a8 R15=ffff88800fbc3410 RIP=ffffffff818098cf RFL=00000286 [--S--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 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=00007f8245c23d10 CR3=000000000d4a6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=481fed77ff6e47fd00000000000ae988 XMM05=f424f3524e2b3e4b0000000000136290 XMM06=e4cb8bb95a7664b600000000001353d8 XMM07=fb795ef6d65770560000000000126060 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813ad6d0 RBX=ffffffff813ad420 RCX=ffff888008e57958 RDX=1ffff110011caf22 RSI=ffff888008e57950 RDI=ffffffff813ad6d0 RBP=ffff888008e57950 RSP=ffff888008e578b8 R8 =0000000000000001 R9 =ffff888008e578f8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008e57980 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff88800da9d6c0 RIP=ffffffff810bd06d RFL=00000246 [---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 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=00007f25c902e008 CR3=000000000ded0000 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=38333a3531203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732038333a3833 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323132 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000