syzkaller login: [ 31.037053] BUG: Bad rss-counter state mm:00000000898bb872 type:MM_FILEPAGES val:33 [ 31.038140] BUG: Bad rss-counter state mm:00000000898bb872 type:MM_ANONPAGES val:22 [ 31.163571] ================================================================== [ 31.164219] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.164920] Read of size 8 at addr ffff888016677ed8 by task sshd/221 [ 31.165482] [ 31.165664] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.166279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.166946] Call Trace: [ 31.167173] [ 31.167371] dump_stack_lvl+0x91/0xf0 [ 31.167752] print_report+0xcc/0x620 [ 31.168341] ? __virt_addr_valid+0x102/0x340 [ 31.168746] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.169173] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.169593] kasan_report+0xbe/0xf0 [ 31.169922] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.170390] vma_interval_tree_remove+0xc75/0xec0 [ 31.170821] vma_prepare+0xc54/0x11a0 [ 31.171158] __split_vma+0x5af/0x950 [ 31.171483] ? __pfx___split_vma+0x10/0x10 [ 31.171849] ? find_held_lock+0x2c/0x110 [ 31.172247] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.172698] ? lock_is_held_type+0x9f/0x120 [ 31.173070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.173491] ? mtree_range_walk+0x632/0x900 [ 31.173872] ? mas_walk+0x5c7/0x7c0 [ 31.174207] do_vmi_munmap+0x1f1/0x2b0 [ 31.174536] mmap_region+0x1f9/0x2660 [ 31.174855] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.175202] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.175693] ? __pfx_lock_acquire+0x10/0x10 [ 31.176064] ? __pfx_mmap_region+0x10/0x10 [ 31.176424] ? security_mmap_addr+0x7d/0xa0 [ 31.176816] ? get_unmapped_area+0x1f5/0x3f0 [ 31.177185] do_mmap+0x854/0xf00 [ 31.177480] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.177809] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.178176] ksys_mmap_pgoff+0x3af/0x500 [ 31.178513] do_syscall_64+0x3f/0x90 [ 31.178825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.179251] RIP: 0033:0x7f73163d3d82 [ 31.179550] 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 [ 31.180988] RSP: 002b:00007ffd82279cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.181598] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73163d3d82 [ 31.182170] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f731580d000 [ 31.182722] RBP: 00007f731580d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.183289] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559269ebdec0 [ 31.183864] R13: 00007ffd82279d10 R14: 00007ffd82279d40 R15: 00007ffd8227a0a0 [ 31.184418] [ 31.184672] [ 31.184813] Allocated by task 214: [ 31.185093] kasan_save_stack+0x22/0x50 [ 31.185429] kasan_set_track+0x25/0x30 [ 31.185744] __kasan_slab_alloc+0x59/0x70 [ 31.186083] kmem_cache_alloc+0x16b/0x370 [ 31.186423] vm_area_dup+0x20/0x160 [ 31.186725] __split_vma+0x170/0x950 [ 31.187027] split_vma+0xc6/0x110 [ 31.187310] mprotect_fixup+0x8d2/0xb30 [ 31.187635] do_mprotect_pkey+0x87e/0xd40 [ 31.187988] __x64_sys_mprotect+0x78/0xc0 [ 31.188323] do_syscall_64+0x3f/0x90 [ 31.188656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.189076] [ 31.189213] Freed by task 214: [ 31.189467] kasan_save_stack+0x22/0x50 [ 31.189803] kasan_set_track+0x25/0x30 [ 31.190124] kasan_save_free_info+0x2b/0x50 [ 31.190474] __kasan_slab_free+0x10a/0x190 [ 31.190810] kmem_cache_free+0x10d/0x4d0 [ 31.191137] rcu_core+0x8c8/0x2860 [ 31.191425] __do_softirq+0x1b7/0x7d4 [ 31.191729] [ 31.191867] Last potentially related work creation: [ 31.192248] kasan_save_stack+0x22/0x50 [ 31.192582] __kasan_record_aux_stack+0x8e/0xa0 [ 31.193008] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.193421] remove_vma+0x139/0x170 [ 31.193715] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.194076] do_vmi_munmap+0x1f1/0x2b0 [ 31.194395] __vm_munmap+0x138/0x3a0 [ 31.194702] __x64_sys_munmap+0x59/0x80 [ 31.195022] do_syscall_64+0x3f/0x90 [ 31.195325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.195743] [ 31.195880] The buggy address belongs to the object at ffff888016677e80 [ 31.195880] which belongs to the cache vm_area_struct of size 168 [ 31.196863] The buggy address is located 88 bytes inside of [ 31.196863] freed 168-byte region [ffff888016677e80, ffff888016677f28) [ 31.197770] [ 31.197908] The buggy address belongs to the physical page: [ 31.198341] page:00000000d09747fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16677 [ 31.199050] memcg:ffff88800f161201 [ 31.199323] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.199742] page_type: 0xffffffff() [ 31.200029] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.200657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f161201 [ 31.201261] page dumped because: kasan: bad access detected [ 31.201701] [ 31.201845] Memory state around the buggy address: [ 31.202238] ffff888016677d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.202806] ffff888016677e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.203366] >ffff888016677e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.203921] ^ [ 31.204381] ffff888016677f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.204982] ffff888016677f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.205534] ================================================================== [ 31.206141] Disabling lock debugging due to kernel taint [ 33.034734] BUG: Bad rss-counter state mm:00000000dcbf20c3 type:MM_FILEPAGES val:33 [ 33.035816] BUG: Bad rss-counter state mm:00000000dcbf20c3 type:MM_ANONPAGES val:22 [ 33.405213] BUG: Bad rss-counter state mm:00000000130efb19 type:MM_FILEPAGES val:33 [ 33.405886] BUG: Bad rss-counter state mm:00000000130efb19 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46326' (ECDSA) to the list of known hosts. 2023/06/21 08:58:43 fuzzer started 2023/06/21 08:58:43 dialing manager at localhost:36067 2023/06/21 08:58:43 checking machine... 2023/06/21 08:58:43 checking revisions... [ 33.966220] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:58:43 testing simple program... [ 34.002364] cgroup: Unknown subsys name 'net' [ 34.069905] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:58:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=0000561eef3bbfe0 CR3=000000000f6d2000 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=2032343a38353a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a38353a3830203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff811d08f0 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=ffffffffffffffff RSI=0000000000000000 RDI=ffff888017e5ff58 RBP=ffff888017e5ff48 RSP=ffff888017e5ff40 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888017e5ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450cc7a RFL=00000206 [-----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 00007fb077f08900 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=00007ffc96d50000 CR3=0000000018c10000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000