syzkaller login: [ 69.830005] BUG: Bad rss-counter state mm:000000000db31935 type:MM_FILEPAGES val:33 [ 69.830650] BUG: Bad rss-counter state mm:000000000db31935 type:MM_ANONPAGES val:22 [ 69.997046] ================================================================== [ 69.997999] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.998961] Read of size 8 at addr ffff88800dfcc3f8 by task sshd/220 [ 69.999865] [ 70.000094] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 70.000959] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.002004] Call Trace: [ 70.002332] [ 70.002615] dump_stack_lvl+0x91/0xf0 [ 70.003102] print_report+0xcc/0x620 [ 70.003587] ? __virt_addr_valid+0x102/0x340 [ 70.004141] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.004762] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.005394] kasan_report+0xbe/0xf0 [ 70.005873] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.006504] vma_interval_tree_remove+0xc75/0xec0 [ 70.007108] vma_prepare+0xc54/0x11a0 [ 70.007594] __split_vma+0x5af/0x950 [ 70.008068] ? __pfx___split_vma+0x10/0x10 [ 70.008603] ? find_held_lock+0x2c/0x110 [ 70.009143] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.009721] ? lock_is_held_type+0x9f/0x120 [ 70.010257] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.010867] ? mtree_range_walk+0x632/0x900 [ 70.011423] ? mas_walk+0x5c7/0x7c0 [ 70.011904] do_vmi_munmap+0x1f1/0x2b0 [ 70.012403] mmap_region+0x1f9/0x2660 [ 70.012890] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.013437] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.014185] ? __pfx_lock_acquire+0x10/0x10 [ 70.014726] ? __pfx_mmap_region+0x10/0x10 [ 70.015250] ? security_mmap_addr+0x7d/0xa0 [ 70.015782] ? get_unmapped_area+0x1f5/0x3f0 [ 70.016334] do_mmap+0x854/0xf00 [ 70.016770] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.017280] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.017840] ksys_mmap_pgoff+0x3af/0x500 [ 70.018359] do_syscall_64+0x3f/0x90 [ 70.018843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.019489] RIP: 0033:0x7fe35547fd82 [ 70.019948] 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 [ 70.022094] RSP: 002b:00007ffe4da8d408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.023008] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe35547fd82 [ 70.023865] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3548b9000 [ 70.024707] RBP: 00007fe3548b9000 R08: 0000000000000009 R09: 0000000000001000 [ 70.025560] R10: 0000000000000812 R11: 0000000000000206 R12: 000055954b0bfb20 [ 70.026394] R13: 00007ffe4da8d420 R14: 00007ffe4da8d450 R15: 00007ffe4da8d7b0 [ 70.027244] [ 70.027533] [ 70.027748] Allocated by task 213: [ 70.028175] kasan_save_stack+0x22/0x50 [ 70.028672] kasan_set_track+0x25/0x30 [ 70.029165] __kasan_slab_alloc+0x59/0x70 [ 70.029688] kmem_cache_alloc+0x16b/0x370 [ 70.030200] vm_area_dup+0x20/0x160 [ 70.030658] __split_vma+0x170/0x950 [ 70.031118] split_vma+0xc6/0x110 [ 70.031560] mprotect_fixup+0x8d2/0xb30 [ 70.032053] do_mprotect_pkey+0x87e/0xd40 [ 70.032566] __x64_sys_mprotect+0x78/0xc0 [ 70.033098] do_syscall_64+0x3f/0x90 [ 70.033565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.034202] [ 70.034416] Freed by task 213: [ 70.034803] kasan_save_stack+0x22/0x50 [ 70.035307] kasan_set_track+0x25/0x30 [ 70.035792] kasan_save_free_info+0x2b/0x50 [ 70.036323] __kasan_slab_free+0x10a/0x190 [ 70.036857] kmem_cache_free+0x10d/0x4d0 [ 70.037370] rcu_core+0x8c8/0x2860 [ 70.037807] __do_softirq+0x1b7/0x7d4 [ 70.038282] [ 70.038504] Last potentially related work creation: [ 70.039093] kasan_save_stack+0x22/0x50 [ 70.039593] __kasan_record_aux_stack+0x8e/0xa0 [ 70.040164] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.040806] remove_vma+0x139/0x170 [ 70.041287] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.041851] do_vmi_munmap+0x1f1/0x2b0 [ 70.042337] __vm_munmap+0x138/0x3a0 [ 70.042801] __x64_sys_munmap+0x59/0x80 [ 70.043294] do_syscall_64+0x3f/0x90 [ 70.043776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.044415] [ 70.044632] Second to last potentially related work creation: [ 70.045321] kasan_save_stack+0x22/0x50 [ 70.045818] __kasan_record_aux_stack+0x8e/0xa0 [ 70.046389] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.047024] remove_vma+0x139/0x170 [ 70.047473] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.048032] do_vmi_munmap+0x1f1/0x2b0 [ 70.048510] mmap_region+0x1f9/0x2660 [ 70.048984] do_mmap+0x854/0xf00 [ 70.049426] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.049913] ksys_mmap_pgoff+0x3af/0x500 [ 70.050416] do_syscall_64+0x3f/0x90 [ 70.050890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.051528] [ 70.051741] The buggy address belongs to the object at ffff88800dfcc3a0 [ 70.051741] which belongs to the cache vm_area_struct of size 168 [ 70.053229] The buggy address is located 88 bytes inside of [ 70.053229] freed 168-byte region [ffff88800dfcc3a0, ffff88800dfcc448) [ 70.054628] [ 70.054846] The buggy address belongs to the physical page: [ 70.055513] page:0000000051e88d8b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfcc [ 70.056587] memcg:ffff88800e7bdc01 [ 70.057014] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.057661] page_type: 0xffffffff() [ 70.058121] raw: 0100000000000200 ffff88800879fc80 ffffea00003ce440 dead000000000004 [ 70.059040] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7bdc01 [ 70.059940] page dumped because: kasan: bad access detected [ 70.060600] [ 70.060814] Memory state around the buggy address: [ 70.061414] ffff88800dfcc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 70.062265] ffff88800dfcc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 70.063110] >ffff88800dfcc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 70.063960] ^ [ 70.064800] ffff88800dfcc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 70.065659] ffff88800dfcc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.066513] ================================================================== [ 70.067548] Disabling lock debugging due to kernel taint [ 71.979875] BUG: Bad rss-counter state mm:000000006bf8f31d type:MM_FILEPAGES val:33 [ 71.981980] BUG: Bad rss-counter state mm:000000006bf8f31d type:MM_ANONPAGES val:22 [ 72.476328] BUG: Bad rss-counter state mm:00000000d577de00 type:MM_FILEPAGES val:33 [ 72.477517] BUG: Bad rss-counter state mm:00000000d577de00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57969' (ECDSA) to the list of known hosts. 2023/06/20 06:14:35 fuzzer started 2023/06/20 06:14:35 dialing manager at localhost:44161 2023/06/20 06:14:35 checking machine... 2023/06/20 06:14:35 checking revisions... [ 73.175966] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:14:35 testing simple program... [ 73.241574] cgroup: Unknown subsys name 'net' [ 73.291777] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:14:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff856529e0 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=ffffffff86605973 RSP=ffff88806ce099f0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e33 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 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=00007ffd6c04c508 CR3=0000000005482000 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=00007fdb2064951000005575f185c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=0000000000036000 RSI=0000000000036000 RDI=ffffffff865bfbc0 RBP=ffff8880167a7760 RSP=ffff8880167a7698 R8 =0000000000000000 R9 =ffff8880167a7748 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880167a7768 R13=ffff8880167a7750 R14=ffff8880167a7749 R15=ffff8880167a7708 RIP=ffffffff8113078b 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 00007f4391548900 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=00007ffd694cd000 CR3=000000001baa6000 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