syzkaller login: [ 29.798301] BUG: Bad rss-counter state mm:000000009329ce0e type:MM_FILEPAGES val:33 [ 29.800480] BUG: Bad rss-counter state mm:000000009329ce0e type:MM_ANONPAGES val:22 [ 29.973938] ================================================================== [ 29.976450] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.978713] Read of size 8 at addr ffff888019c07ed8 by task sshd/221 [ 29.980652] [ 29.981270] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.983324] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.985745] Call Trace: [ 29.986550] [ 29.987259] dump_stack_lvl+0x91/0xf0 [ 29.988458] print_report+0xcc/0x620 [ 29.989591] ? __virt_addr_valid+0x102/0x340 [ 29.990870] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.993805] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.995222] kasan_report+0xbe/0xf0 [ 29.996226] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.997641] vma_interval_tree_remove+0xc75/0xec0 [ 29.998935] vma_prepare+0xc54/0x11a0 [ 29.999879] __split_vma+0x5af/0x950 [ 30.000858] ? __pfx___split_vma+0x10/0x10 [ 30.002118] ? find_held_lock+0x2c/0x110 [ 30.003178] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.004354] ? lock_is_held_type+0x9f/0x120 [ 30.005568] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.006841] ? mtree_range_walk+0x632/0x900 [ 30.008049] ? mas_walk+0x5c7/0x7c0 [ 30.009100] do_vmi_munmap+0x1f1/0x2b0 [ 30.010142] mmap_region+0x1f9/0x2660 [ 30.011169] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.012678] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.014380] ? __pfx_lock_acquire+0x10/0x10 [ 30.015520] ? __pfx_mmap_region+0x10/0x10 [ 30.016633] ? security_mmap_addr+0x7d/0xa0 [ 30.017835] ? get_unmapped_area+0x1f5/0x3f0 [ 30.019019] do_mmap+0x854/0xf00 [ 30.019804] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.020754] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.021962] ksys_mmap_pgoff+0x3af/0x500 [ 30.022967] do_syscall_64+0x3f/0x90 [ 30.023844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.025248] RIP: 0033:0x7f66c7957d82 [ 30.026173] 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 [ 30.030833] RSP: 002b:00007ffdc3107628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.032941] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66c7957d82 [ 30.034717] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66c6d91000 [ 30.036548] RBP: 00007f66c6d91000 R08: 0000000000000009 R09: 0000000000001000 [ 30.038360] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ad2756d90 [ 30.040167] R13: 00007ffdc3107640 R14: 00007ffdc3107670 R15: 00007ffdc31079d0 [ 30.041961] [ 30.042506] [ 30.042880] Allocated by task 214: [ 30.043780] kasan_save_stack+0x22/0x50 [ 30.044757] kasan_set_track+0x25/0x30 [ 30.045727] __kasan_slab_alloc+0x59/0x70 [ 30.046733] kmem_cache_alloc+0x16b/0x370 [ 30.047749] vm_area_dup+0x20/0x160 [ 30.048617] __split_vma+0x170/0x950 [ 30.049562] split_vma+0xc6/0x110 [ 30.050445] mprotect_fixup+0x8d2/0xb30 [ 30.051419] do_mprotect_pkey+0x87e/0xd40 [ 30.052465] __x64_sys_mprotect+0x78/0xc0 [ 30.053499] do_syscall_64+0x3f/0x90 [ 30.054433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.055702] [ 30.056165] Freed by task 214: [ 30.056952] kasan_save_stack+0x22/0x50 [ 30.057962] kasan_set_track+0x25/0x30 [ 30.058931] kasan_save_free_info+0x2b/0x50 [ 30.060033] __kasan_slab_free+0x10a/0x190 [ 30.061121] kmem_cache_free+0x10d/0x4d0 [ 30.062117] rcu_core+0x8c8/0x2860 [ 30.063006] __do_softirq+0x1b7/0x7d4 [ 30.063941] [ 30.064325] Last potentially related work creation: [ 30.065529] kasan_save_stack+0x22/0x50 [ 30.066524] __kasan_record_aux_stack+0x8e/0xa0 [ 30.067676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.069005] remove_vma+0x139/0x170 [ 30.069844] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.070963] do_vmi_munmap+0x1f1/0x2b0 [ 30.071865] __vm_munmap+0x138/0x3a0 [ 30.072814] __x64_sys_munmap+0x59/0x80 [ 30.073836] do_syscall_64+0x3f/0x90 [ 30.074806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.076185] [ 30.076578] The buggy address belongs to the object at ffff888019c07e80 [ 30.076578] which belongs to the cache vm_area_struct of size 168 [ 30.079754] The buggy address is located 88 bytes inside of [ 30.079754] freed 168-byte region [ffff888019c07e80, ffff888019c07f28) [ 30.082826] [ 30.083283] The buggy address belongs to the physical page: [ 30.084679] page:00000000d6f92c50 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c07 [ 30.086988] memcg:ffff88801a39af01 [ 30.087824] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.089314] page_type: 0xffffffff() [ 30.090271] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.092325] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a39af01 [ 30.094379] page dumped because: kasan: bad access detected [ 30.095804] [ 30.096279] Memory state around the buggy address: [ 30.097108] ffff888019c07d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.097870] ffff888019c07e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.098703] >ffff888019c07e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.099507] ^ [ 30.100203] ffff888019c07f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.101029] ffff888019c07f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.101754] ================================================================== [ 30.113094] Disabling lock debugging due to kernel taint [ 34.145044] BUG: Bad rss-counter state mm:00000000af53546f type:MM_FILEPAGES val:33 [ 34.145682] BUG: Bad rss-counter state mm:00000000af53546f type:MM_ANONPAGES val:22 [ 34.875186] BUG: Bad rss-counter state mm:00000000460e60ad type:MM_FILEPAGES val:33 [ 34.875802] BUG: Bad rss-counter state mm:00000000460e60ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54252' (ECDSA) to the list of known hosts. 2023/06/21 10:18:56 fuzzer started 2023/06/21 10:18:57 dialing manager at localhost:36067 2023/06/21 10:18:57 checking machine... 2023/06/21 10:18:57 checking revisions... [ 35.906309] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:18:57 testing simple program... [ 35.954340] cgroup: Unknown subsys name 'net' [ 36.016848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:18:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85652c08 RCX=0000000000000000 RDX=1ffffffff0aca581 RSI=ffffffff814c84af RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016b17478 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007fdca00f44bb R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000092cc0 RIP=ffffffff814c84d8 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 00007fdc9fc35900 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=00007fdc9fc356f8 CR3=000000000e0d0000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=ffffed1001e7b801 RSI=0000000000000004 RDI=ffff88800f3dc000 RBP=ffff88800f3dc000 RSP=ffff888015b0f7a8 R8 =0000000000000000 R9 =ffffed1001e7b800 R10=ffff88800f3dc003 R11=0000000000000000 R12=0000000000000003 R13=ffffed1001e7b800 R14=0000000000000001 R15=1ffff11002b61ef6 RIP=ffffffff8453683e RFL=00000002 [-------] 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=00007f4eb7c03b40 CR3=00000000136f0000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=71254db9b725a45a0000000000132940 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=e5fcf26693a4e52100000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000