syzkaller login: [ 32.257309] BUG: Bad rss-counter state mm:0000000095ef1caa type:MM_FILEPAGES val:33 [ 32.258547] BUG: Bad rss-counter state mm:0000000095ef1caa type:MM_ANONPAGES val:22 [ 32.321550] ================================================================== [ 32.322464] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.323405] Read of size 8 at addr ffff88800e50e3f8 by task sshd/220 [ 32.324171] [ 32.324386] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.325343] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.326412] Call Trace: [ 32.326766] [ 32.327059] dump_stack_lvl+0x91/0xf0 [ 32.327574] print_report+0xcc/0x620 [ 32.328108] ? __virt_addr_valid+0x102/0x340 [ 32.328796] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.329530] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.330189] kasan_report+0xbe/0xf0 [ 32.330669] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.331289] vma_interval_tree_remove+0xc75/0xec0 [ 32.331897] vma_prepare+0xc54/0x11a0 [ 32.332362] __split_vma+0x5af/0x950 [ 32.332811] ? __pfx___split_vma+0x10/0x10 [ 32.333312] ? find_held_lock+0x2c/0x110 [ 32.333811] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.334397] ? lock_is_held_type+0x9f/0x120 [ 32.334954] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.335577] ? mtree_range_walk+0x632/0x900 [ 32.336122] ? mas_walk+0x5c7/0x7c0 [ 32.336605] do_vmi_munmap+0x1f1/0x2b0 [ 32.337103] mmap_region+0x1f9/0x2660 [ 32.337589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.338127] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.338835] ? __pfx_lock_acquire+0x10/0x10 [ 32.339371] ? __pfx_mmap_region+0x10/0x10 [ 32.339897] ? security_mmap_addr+0x7d/0xa0 [ 32.340423] ? get_unmapped_area+0x1f5/0x3f0 [ 32.340978] do_mmap+0x854/0xf00 [ 32.341419] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.341912] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.342508] ksys_mmap_pgoff+0x3af/0x500 [ 32.343019] do_syscall_64+0x3f/0x90 [ 32.343517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.344168] RIP: 0033:0x7f0c6b8a1d82 [ 32.344634] 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 [ 32.346820] RSP: 002b:00007ffc42a5b6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.347742] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c6b8a1d82 [ 32.348599] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c6acdb000 [ 32.349444] RBP: 00007f0c6acdb000 R08: 0000000000000009 R09: 0000000000001000 [ 32.350252] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560047d9ec0 [ 32.351096] R13: 00007ffc42a5b700 R14: 00007ffc42a5b730 R15: 00007ffc42a5ba90 [ 32.352036] [ 32.352346] [ 32.352589] Allocated by task 213: [ 32.353014] kasan_save_stack+0x22/0x50 [ 32.353584] kasan_set_track+0x25/0x30 [ 32.354117] __kasan_slab_alloc+0x59/0x70 [ 32.354643] kmem_cache_alloc+0x16b/0x370 [ 32.355220] vm_area_dup+0x20/0x160 [ 32.355694] __split_vma+0x170/0x950 [ 32.356167] split_vma+0xc6/0x110 [ 32.356613] mprotect_fixup+0x8d2/0xb30 [ 32.357124] do_mprotect_pkey+0x87e/0xd40 [ 32.357648] __x64_sys_mprotect+0x78/0xc0 [ 32.358168] do_syscall_64+0x3f/0x90 [ 32.358639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.359294] [ 32.359512] Freed by task 213: [ 32.359907] kasan_save_stack+0x22/0x50 [ 32.360418] kasan_set_track+0x25/0x30 [ 32.360912] kasan_save_free_info+0x2b/0x50 [ 32.361444] __kasan_slab_free+0x10a/0x190 [ 32.362006] kmem_cache_free+0x10d/0x4d0 [ 32.362524] rcu_core+0x8c8/0x2860 [ 32.362972] __do_softirq+0x1b7/0x7d4 [ 32.363454] [ 32.363672] Last potentially related work creation: [ 32.364260] kasan_save_stack+0x22/0x50 [ 32.364766] __kasan_record_aux_stack+0x8e/0xa0 [ 32.365347] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.366014] remove_vma+0x139/0x170 [ 32.366471] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.367028] do_vmi_munmap+0x1f1/0x2b0 [ 32.367517] __vm_munmap+0x138/0x3a0 [ 32.367983] __x64_sys_munmap+0x59/0x80 [ 32.368483] do_syscall_64+0x3f/0x90 [ 32.368957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.369599] [ 32.369817] Second to last potentially related work creation: [ 32.370525] kasan_save_stack+0x22/0x50 [ 32.371025] __kasan_record_aux_stack+0x8e/0xa0 [ 32.371604] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.372255] remove_vma+0x139/0x170 [ 32.372706] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.373259] do_vmi_munmap+0x1f1/0x2b0 [ 32.373741] mmap_region+0x1f9/0x2660 [ 32.374236] do_mmap+0x854/0xf00 [ 32.374663] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.375145] ksys_mmap_pgoff+0x3af/0x500 [ 32.375642] do_syscall_64+0x3f/0x90 [ 32.376122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.376763] [ 32.376976] The buggy address belongs to the object at ffff88800e50e3a0 [ 32.376976] which belongs to the cache vm_area_struct of size 168 [ 32.378453] The buggy address is located 88 bytes inside of [ 32.378453] freed 168-byte region [ffff88800e50e3a0, ffff88800e50e448) [ 32.379859] [ 32.380076] The buggy address belongs to the physical page: [ 32.380747] page:000000004cbea1b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe50e [ 32.381832] memcg:ffff88800e5fb301 [ 32.382267] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.382915] page_type: 0xffffffff() [ 32.383368] raw: 0100000000000200 ffff88800879fc80 ffffea0000382a40 dead000000000002 [ 32.384285] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5fb301 [ 32.385199] page dumped because: kasan: bad access detected [ 32.385868] [ 32.386101] Memory state around the buggy address: [ 32.386681] ffff88800e50e280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.387549] ffff88800e50e300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.388399] >ffff88800e50e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.389249] ^ [ 32.390103] ffff88800e50e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.390964] ffff88800e50e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.391825] ================================================================== [ 32.392833] Disabling lock debugging due to kernel taint [ 35.010922] BUG: Bad rss-counter state mm:00000000fe4f57ff type:MM_FILEPAGES val:33 [ 35.012406] BUG: Bad rss-counter state mm:00000000fe4f57ff type:MM_ANONPAGES val:22 [ 35.488400] BUG: Bad rss-counter state mm:00000000dffd11e6 type:MM_FILEPAGES val:33 [ 35.489372] BUG: Bad rss-counter state mm:00000000dffd11e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22921' (ECDSA) to the list of known hosts. 2023/06/19 19:33:45 fuzzer started 2023/06/19 19:33:45 dialing manager at localhost:44161 2023/06/19 19:33:45 checking machine... 2023/06/19 19:33:45 checking revisions... [ 36.208327] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:33:45 testing simple program... [ 36.254737] cgroup: Unknown subsys name 'net' [ 36.302049] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:33:43 Registers: info registers vcpu 0 RAX=ffff8880142e0000 RBX=ffff8880142e7a20 RCX=0000000000000001 RDX=ffff8880142e8000 RSI=ffff8880142e7a20 RDI=ffff8880142e7998 RBP=dffffc0000000000 RSP=ffff8880142e7938 R8 =0000000000000001 R9 =ffff8880142e79c8 R10=0000000000038001 R11=0000000000003c0d R12=ffffed100285cf33 R13=ffffed100285cf32 R14=ffff8880142e79d0 R15=ffff8880142e7988 RIP=ffffffff81132fc3 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 00007f3bdee94900 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=00007f3bde311ae0 CR3=000000000c5c8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=16b9a1644bb252e900000000000ae988 XMM05=846144bb958a19df0000000000136148 XMM06=e4cb8bb95a7664b60000000000135290 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000055c9c1ccdeb0 RBX=000055c9c1cebed0 RCX=000000000000001e RDX=0000000000000001 RSI=000055c9c1cf9fde RDI=000055c9c1ccdeb0 RBP=00007ffc6622c210 RSP=00007ffc6622c1a8 R8 =000055c9c1cf9fde R9 =00007f932c468be0 R10=0000000000000100 R11=0000000000000246 R12=0000000000000001 R13=000055c9c1cf9fde R14=0000000000000001 R15=0000000000000000 RIP=00007f932c40cb2b RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f932beb6900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc66226000 CR3=0000000016a44000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=000000000000000000000000000000ff XMM02=ffffffffffffff00ffff000000000000 XMM03=622073656e696c282073656e696c2074 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000