syzkaller login: [ 30.676150] BUG: Bad rss-counter state mm:00000000d1364b64 type:MM_FILEPAGES val:33 [ 30.677743] BUG: Bad rss-counter state mm:00000000d1364b64 type:MM_ANONPAGES val:22 [ 30.849364] ================================================================== [ 30.850382] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.851539] Read of size 8 at addr ffff8880103daa50 by task sshd/220 [ 30.852364] [ 30.852601] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.853537] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.854601] Call Trace: [ 30.854940] [ 30.855243] dump_stack_lvl+0x91/0xf0 [ 30.855772] print_report+0xcc/0x620 [ 30.856289] ? __virt_addr_valid+0x102/0x340 [ 30.856872] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.857533] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.858212] kasan_report+0xbe/0xf0 [ 30.858740] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.859429] vma_interval_tree_remove+0xc75/0xec0 [ 30.860098] vma_prepare+0xc54/0x11a0 [ 30.860629] __split_vma+0x5af/0x950 [ 30.861163] ? __pfx___split_vma+0x10/0x10 [ 30.861752] ? find_held_lock+0x2c/0x110 [ 30.862337] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.862964] ? lock_is_held_type+0x9f/0x120 [ 30.863556] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.864238] ? mtree_range_walk+0x632/0x900 [ 30.864851] ? mas_walk+0x5c7/0x7c0 [ 30.865379] do_vmi_munmap+0x1f1/0x2b0 [ 30.865926] mmap_region+0x1f9/0x2660 [ 30.866480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.867047] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.867844] ? __pfx_lock_acquire+0x10/0x10 [ 30.868440] ? __pfx_mmap_region+0x10/0x10 [ 30.869028] ? security_mmap_addr+0x7d/0xa0 [ 30.869619] ? get_unmapped_area+0x1f5/0x3f0 [ 30.870244] do_mmap+0x854/0xf00 [ 30.870736] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.871291] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.871915] ksys_mmap_pgoff+0x3af/0x500 [ 30.872479] do_syscall_64+0x3f/0x90 [ 30.873011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.873723] RIP: 0033:0x7fc68e543d82 [ 30.874235] 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 [ 30.876607] RSP: 002b:00007ffefd2eab38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.877606] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc68e543d82 [ 30.878571] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc68d97d000 [ 30.879521] RBP: 00007fc68d97d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.880464] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b3281eec0 [ 30.881405] R13: 00007ffefd2eab50 R14: 00007ffefd2eab80 R15: 00007ffefd2eaee0 [ 30.882364] [ 30.882689] [ 30.882925] Allocated by task 213: [ 30.883397] kasan_save_stack+0x22/0x50 [ 30.883958] kasan_set_track+0x25/0x30 [ 30.884510] __kasan_slab_alloc+0x59/0x70 [ 30.885093] kmem_cache_alloc+0x16b/0x370 [ 30.885673] vm_area_dup+0x20/0x160 [ 30.886179] __split_vma+0x170/0x950 [ 30.886719] split_vma+0xc6/0x110 [ 30.887202] mprotect_fixup+0x8d2/0xb30 [ 30.887759] do_mprotect_pkey+0x87e/0xd40 [ 30.888336] __x64_sys_mprotect+0x78/0xc0 [ 30.888915] do_syscall_64+0x3f/0x90 [ 30.889439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.890159] [ 30.890406] Freed by task 213: [ 30.890841] kasan_save_stack+0x22/0x50 [ 30.891402] kasan_set_track+0x25/0x30 [ 30.891953] kasan_save_free_info+0x2b/0x50 [ 30.892613] __kasan_slab_free+0x10a/0x190 [ 30.893211] kmem_cache_free+0x10d/0x4d0 [ 30.893775] rcu_core+0x8c8/0x2860 [ 30.894278] __do_softirq+0x1b7/0x7d4 [ 30.894810] [ 30.895050] Last potentially related work creation: [ 30.895699] kasan_save_stack+0x22/0x50 [ 30.896262] __kasan_record_aux_stack+0x8e/0xa0 [ 30.896899] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.897606] remove_vma+0x139/0x170 [ 30.898107] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.898742] do_vmi_munmap+0x1f1/0x2b0 [ 30.899275] __vm_munmap+0x138/0x3a0 [ 30.899795] __x64_sys_munmap+0x59/0x80 [ 30.900348] do_syscall_64+0x3f/0x90 [ 30.900871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.901580] [ 30.901817] The buggy address belongs to the object at ffff8880103da9f8 [ 30.901817] which belongs to the cache vm_area_struct of size 168 [ 30.903474] The buggy address is located 88 bytes inside of [ 30.903474] freed 168-byte region [ffff8880103da9f8, ffff8880103daaa0) [ 30.905055] [ 30.905294] The buggy address belongs to the physical page: [ 30.906026] page:00000000afdda276 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103da [ 30.907251] memcg:ffff888016f9ae01 [ 30.907730] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.908450] page_type: 0xffffffff() [ 30.908950] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.909977] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f9ae01 [ 30.911007] page dumped because: kasan: bad access detected [ 30.911744] [ 30.911981] Memory state around the buggy address: [ 30.912630] ffff8880103da900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.913586] ffff8880103da980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.914560] >ffff8880103daa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.915514] ^ [ 30.916289] ffff8880103daa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.917247] ffff8880103dab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.918204] ================================================================== [ 30.919286] Disabling lock debugging due to kernel taint [ 32.825918] BUG: Bad rss-counter state mm:0000000056d38440 type:MM_FILEPAGES val:33 [ 32.826977] BUG: Bad rss-counter state mm:0000000056d38440 type:MM_ANONPAGES val:22 [ 33.224664] BUG: Bad rss-counter state mm:000000008a1ce115 type:MM_FILEPAGES val:33 [ 33.225371] BUG: Bad rss-counter state mm:000000008a1ce115 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28924' (ECDSA) to the list of known hosts. 2023/06/19 12:43:45 fuzzer started 2023/06/19 12:43:45 dialing manager at localhost:44161 2023/06/19 12:43:45 checking machine... 2023/06/19 12:43:45 checking revisions... [ 33.848003] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:43:45 testing simple program... [ 33.892462] cgroup: Unknown subsys name 'net' [ 33.948849] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:43:44 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000004 RCX=ffffffff818960bd RDX=ffff888019e051c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888019b0be20 RSP=ffff888019fc7ac8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000008000 R14=ffffffff856f0b20 R15=ffff888019fc7c48 RIP=ffffffff814c07eb 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 00007f3e794a9900 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=00007ffdd6ab6000 CR3=000000000e3bc000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8180995c RDX=0000000000008099 RSI=0000000000008099 RDI=ffffffff86507e24 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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=00007f27e6fab890 CR3=000000000c5c8000 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=10af589ca77165bc014f6ce84c778163 XMM02=ec2efd57dc4c00df000000000011c4e0 XMM03=0a5affd16174f2a0000000000011c5b0 XMM04=c01254bc86a57f2e00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133558 XMM06=3e21c350c7f9a40500000000001323c0 XMM07=e042d86d42eb936e0000000000123c70 XMM08=0a5affd16174f2a0000000000011c5b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000