syzkaller login: [ 30.548740] BUG: Bad rss-counter state mm:000000009c4de9a1 type:MM_FILEPAGES val:33 [ 30.550081] BUG: Bad rss-counter state mm:000000009c4de9a1 type:MM_ANONPAGES val:22 [ 30.699928] ================================================================== [ 30.700842] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.701776] Read of size 8 at addr ffff888018d64df0 by task sshd/220 [ 30.702626] [ 30.702857] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.703716] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.704702] Call Trace: [ 30.705022] [ 30.705309] dump_stack_lvl+0x91/0xf0 [ 30.705805] print_report+0xcc/0x620 [ 30.706286] ? __virt_addr_valid+0x102/0x340 [ 30.706840] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.707479] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.708157] kasan_report+0xbe/0xf0 [ 30.708642] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.709272] vma_interval_tree_remove+0xc75/0xec0 [ 30.709889] vma_prepare+0xc54/0x11a0 [ 30.710370] __split_vma+0x5af/0x950 [ 30.710856] ? __pfx___split_vma+0x10/0x10 [ 30.711397] ? find_held_lock+0x2c/0x110 [ 30.711914] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.712500] ? lock_is_held_type+0x9f/0x120 [ 30.713044] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.713651] ? mtree_range_walk+0x632/0x900 [ 30.714206] ? mas_walk+0x5c7/0x7c0 [ 30.714683] do_vmi_munmap+0x1f1/0x2b0 [ 30.715181] mmap_region+0x1f9/0x2660 [ 30.715671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.716193] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.716906] ? __pfx_lock_acquire+0x10/0x10 [ 30.717434] ? __pfx_mmap_region+0x10/0x10 [ 30.717962] ? security_mmap_addr+0x7d/0xa0 [ 30.718492] ? get_unmapped_area+0x1f5/0x3f0 [ 30.719074] do_mmap+0x854/0xf00 [ 30.719515] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.720011] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.720590] ksys_mmap_pgoff+0x3af/0x500 [ 30.721106] do_syscall_64+0x3f/0x90 [ 30.721601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.722265] RIP: 0033:0x7f1da5958d82 [ 30.722718] 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 [ 30.724876] RSP: 002b:00007fffa0c673d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.725791] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1da5958d82 [ 30.726646] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1da4d92000 [ 30.727548] RBP: 00007f1da4d92000 R08: 0000000000000009 R09: 0000000000001000 [ 30.728393] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b07f434980 [ 30.729252] R13: 00007fffa0c673f0 R14: 00007fffa0c67420 R15: 00007fffa0c67780 [ 30.730124] [ 30.730428] [ 30.730648] Allocated by task 213: [ 30.731091] kasan_save_stack+0x22/0x50 [ 30.731596] kasan_set_track+0x25/0x30 [ 30.732084] __kasan_slab_alloc+0x59/0x70 [ 30.732612] kmem_cache_alloc+0x16b/0x370 [ 30.733130] vm_area_dup+0x20/0x160 [ 30.733589] __split_vma+0x170/0x950 [ 30.734058] split_vma+0xc6/0x110 [ 30.734503] mprotect_fixup+0x8d2/0xb30 [ 30.735016] do_mprotect_pkey+0x87e/0xd40 [ 30.735537] __x64_sys_mprotect+0x78/0xc0 [ 30.736058] do_syscall_64+0x3f/0x90 [ 30.736543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.737191] [ 30.737405] Freed by task 213: [ 30.737807] kasan_save_stack+0x22/0x50 [ 30.738305] kasan_set_track+0x25/0x30 [ 30.738801] kasan_save_free_info+0x2b/0x50 [ 30.739356] __kasan_slab_free+0x10a/0x190 [ 30.739890] kmem_cache_free+0x10d/0x4d0 [ 30.740406] rcu_core+0x8c8/0x2860 [ 30.740850] __do_softirq+0x1b7/0x7d4 [ 30.741331] [ 30.741545] Last potentially related work creation: [ 30.742141] kasan_save_stack+0x22/0x50 [ 30.742662] __kasan_record_aux_stack+0x8e/0xa0 [ 30.743260] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.743908] remove_vma+0x139/0x170 [ 30.744356] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.744912] do_vmi_munmap+0x1f1/0x2b0 [ 30.745400] __vm_munmap+0x138/0x3a0 [ 30.745870] __x64_sys_munmap+0x59/0x80 [ 30.746371] do_syscall_64+0x3f/0x90 [ 30.746867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.747524] [ 30.747738] The buggy address belongs to the object at ffff888018d64d98 [ 30.747738] which belongs to the cache vm_area_struct of size 168 [ 30.749220] The buggy address is located 88 bytes inside of [ 30.749220] freed 168-byte region [ffff888018d64d98, ffff888018d64e40) [ 30.750623] [ 30.750837] The buggy address belongs to the physical page: [ 30.751514] page:00000000bacab11a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d64 [ 30.752606] memcg:ffff88801a128301 [ 30.753036] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.753680] page_type: 0xffffffff() [ 30.754127] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.755046] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a128301 [ 30.755953] page dumped because: kasan: bad access detected [ 30.756620] [ 30.756837] Memory state around the buggy address: [ 30.757424] ffff888018d64c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.758275] ffff888018d64d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.759200] >ffff888018d64d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.760049] ^ [ 30.760892] ffff888018d64e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.761743] ffff888018d64e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.762603] ================================================================== [ 30.763961] Disabling lock debugging due to kernel taint [ 32.880207] BUG: Bad rss-counter state mm:00000000fcf54a4b type:MM_FILEPAGES val:33 [ 32.881766] BUG: Bad rss-counter state mm:00000000fcf54a4b type:MM_ANONPAGES val:22 [ 33.372343] BUG: Bad rss-counter state mm:00000000ebd90b18 type:MM_FILEPAGES val:33 [ 33.373566] BUG: Bad rss-counter state mm:00000000ebd90b18 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51503' (ECDSA) to the list of known hosts. 2023/06/20 17:50:38 fuzzer started 2023/06/20 17:50:38 dialing manager at localhost:36067 2023/06/20 17:50:38 checking machine... 2023/06/20 17:50:38 checking revisions... [ 34.065900] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:50:38 testing simple program... [ 34.116854] cgroup: Unknown subsys name 'net' [ 34.163630] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:50:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000007ffffff RCX=00000000000001fd RDX=1ffffffff0fe7c2c RSI=0000000000000d40 RDI=ffff88800bf3fc80 RBP=ffff888015aa7a00 RSP=ffff888015aa79b0 R8 =0000000000000c40 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000000 R12=ffff88800bf3fc80 R13=0000000000000c40 R14=0000000000000000 R15=ffffffff87f3e160 RIP=ffffffff81807ef2 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 00007fde37fff700 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=00007f7bec8d70b0 CR3=0000000016d46000 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=2038333a30353a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a30353a3731203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 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=00007f9049ffbd00 CR3=000000000c6ac000 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=1bbc39a7ce914aa5a1437314a08f24a5 XMM02=2c67c8bc2e329bc3000000000011afa8 XMM03=fb795ef6d65770560000000000122448 XMM04=8225e875c6cff9cc00000000000ae988 XMM05=a731de7903e8b0260000000000133078 XMM06=4fda316b135da52b0000000000132118 XMM07=e042d86d42eb936e00000000001226c8 XMM08=3ab48e57f25c2783000000000011b008 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000