syzkaller login: [ 24.952557] BUG: Bad rss-counter state mm:00000000a3e6c42b type:MM_FILEPAGES val:33 [ 24.953989] BUG: Bad rss-counter state mm:00000000a3e6c42b type:MM_ANONPAGES val:22 [ 24.996645] ================================================================== [ 24.997687] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.998977] Read of size 8 at addr ffff888019816d08 by task sshd/219 [ 24.999912] [ 25.000135] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.000994] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.002023] Call Trace: [ 25.002350] [ 25.002638] dump_stack_lvl+0x91/0xf0 [ 25.003131] print_report+0xcc/0x620 [ 25.003617] ? __virt_addr_valid+0x102/0x340 [ 25.004164] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.004792] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.005404] kasan_report+0xbe/0xf0 [ 25.005905] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.006523] vma_interval_tree_remove+0xc75/0xec0 [ 25.007135] vma_prepare+0xc54/0x11a0 [ 25.007619] __split_vma+0x5af/0x950 [ 25.008093] ? __pfx___split_vma+0x10/0x10 [ 25.008621] ? find_held_lock+0x2c/0x110 [ 25.009149] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.009739] ? lock_is_held_type+0x9f/0x120 [ 25.010274] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.010884] ? mtree_range_walk+0x632/0x900 [ 25.011437] ? mas_walk+0x5c7/0x7c0 [ 25.011913] do_vmi_munmap+0x1f1/0x2b0 [ 25.012406] mmap_region+0x1f9/0x2660 [ 25.012897] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.013404] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.014126] ? __pfx_lock_acquire+0x10/0x10 [ 25.014660] ? __pfx_mmap_region+0x10/0x10 [ 25.015191] ? security_mmap_addr+0x7d/0xa0 [ 25.015724] ? get_unmapped_area+0x1f5/0x3f0 [ 25.016288] do_mmap+0x854/0xf00 [ 25.016739] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.017233] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.017828] ksys_mmap_pgoff+0x3af/0x500 [ 25.018343] do_syscall_64+0x3f/0x90 [ 25.018820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.019471] RIP: 0033:0x7fe9f4aafd82 [ 25.019925] 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 [ 25.022066] RSP: 002b:00007ffd7d631a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.022978] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9f4aafd82 [ 25.023827] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9f3ee9000 [ 25.024678] RBP: 00007fe9f3ee9000 R08: 0000000000000009 R09: 0000000000001000 [ 25.025533] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7a8739ec0 [ 25.026380] R13: 00007ffd7d631a30 R14: 00007ffd7d631a60 R15: 00007ffd7d631dc0 [ 25.027235] [ 25.027533] [ 25.027753] Allocated by task 212: [ 25.028185] kasan_save_stack+0x22/0x50 [ 25.028699] kasan_set_track+0x25/0x30 [ 25.029194] __kasan_slab_alloc+0x59/0x70 [ 25.029735] kmem_cache_alloc+0x16b/0x370 [ 25.030258] vm_area_dup+0x20/0x160 [ 25.030722] __split_vma+0x170/0x950 [ 25.031191] split_vma+0xc6/0x110 [ 25.031638] mprotect_fixup+0x8d2/0xb30 [ 25.032145] do_mprotect_pkey+0x87e/0xd40 [ 25.032671] __x64_sys_mprotect+0x78/0xc0 [ 25.033204] do_syscall_64+0x3f/0x90 [ 25.033696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.034352] [ 25.034570] Freed by task 13: [ 25.034955] kasan_save_stack+0x22/0x50 [ 25.035489] kasan_set_track+0x25/0x30 [ 25.036000] kasan_save_free_info+0x2b/0x50 [ 25.036537] __kasan_slab_free+0x10a/0x190 [ 25.037088] kmem_cache_free+0x10d/0x4d0 [ 25.037627] rcu_core+0x8c8/0x2860 [ 25.038083] __do_softirq+0x1b7/0x7d4 [ 25.038558] [ 25.038774] Last potentially related work creation: [ 25.039360] kasan_save_stack+0x22/0x50 [ 25.039867] __kasan_record_aux_stack+0x8e/0xa0 [ 25.040439] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.041088] remove_vma+0x139/0x170 [ 25.041548] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.042189] do_vmi_munmap+0x1f1/0x2b0 [ 25.042679] __vm_munmap+0x138/0x3a0 [ 25.043149] __x64_sys_munmap+0x59/0x80 [ 25.043666] do_syscall_64+0x3f/0x90 [ 25.044146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.044791] [ 25.045012] The buggy address belongs to the object at ffff888019816cb0 [ 25.045012] which belongs to the cache vm_area_struct of size 168 [ 25.046488] The buggy address is located 88 bytes inside of [ 25.046488] freed 168-byte region [ffff888019816cb0, ffff888019816d58) [ 25.047897] [ 25.048121] The buggy address belongs to the physical page: [ 25.048793] page:000000001b3fce6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19816 [ 25.049910] memcg:ffff88800e85aa01 [ 25.050348] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.050999] page_type: 0xffffffff() [ 25.051451] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.052374] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e85aa01 [ 25.053289] page dumped because: kasan: bad access detected [ 25.053967] [ 25.054183] Memory state around the buggy address: [ 25.054773] ffff888019816c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 25.055635] ffff888019816c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 25.056484] >ffff888019816d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 25.057333] ^ [ 25.057795] ffff888019816d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 25.058648] ffff888019816e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 25.059504] ================================================================== [ 25.060532] Disabling lock debugging due to kernel taint [ 27.094921] BUG: Bad rss-counter state mm:00000000c27fc655 type:MM_FILEPAGES val:33 [ 27.095879] BUG: Bad rss-counter state mm:00000000c27fc655 type:MM_ANONPAGES val:22 [ 27.593572] BUG: Bad rss-counter state mm:00000000f0618dc9 type:MM_FILEPAGES val:33 [ 27.594574] BUG: Bad rss-counter state mm:00000000f0618dc9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53438' (ECDSA) to the list of known hosts. 2023/06/19 13:32:26 fuzzer started 2023/06/19 13:32:26 dialing manager at localhost:44161 2023/06/19 13:32:26 checking machine... 2023/06/19 13:32:26 checking revisions... [ 28.321122] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:32:26 testing simple program... [ 28.367392] cgroup: Unknown subsys name 'net' [ 28.425444] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:32:25 Registers: info registers vcpu 0 RAX=00000000dd3a77dc RBX=00000000c4c457f1 RCX=ffff88801999f67c RDX=000000000000000d RSI=0000000000000011 RDI=00000000ca039693 RBP=0000000000000000 RSP=ffff88801999f5f0 R8 =0000000092f5df5d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88801999f658 R15=000000000000000d RIP=ffffffff82270eb0 RFL=00000282 [--S----] 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 00007f0666a07700 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=00007f8786791618 CR3=00000000167e6000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732035323a3233 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323837 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f6edfbcd830 CR3=00000000167e6000 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=2035323a32333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a32333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000