syzkaller login: [ 30.430378] BUG: Bad rss-counter state mm:0000000030b3548b type:MM_FILEPAGES val:33 [ 30.431269] BUG: Bad rss-counter state mm:0000000030b3548b type:MM_ANONPAGES val:22 [ 30.542597] ================================================================== [ 30.543286] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.543892] Read of size 8 at addr ffff88800cd81ed8 by task sshd/221 [ 30.544384] [ 30.544543] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.545132] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.545875] Call Trace: [ 30.546092] [ 30.546283] dump_stack_lvl+0x91/0xf0 [ 30.546793] print_report+0xcc/0x620 [ 30.547182] ? __virt_addr_valid+0x102/0x340 [ 30.547558] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.547953] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.548347] kasan_report+0xbe/0xf0 [ 30.548674] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.549109] vma_interval_tree_remove+0xc75/0xec0 [ 30.549566] vma_prepare+0xc54/0x11a0 [ 30.549886] __split_vma+0x5af/0x950 [ 30.550203] ? __pfx___split_vma+0x10/0x10 [ 30.550561] ? find_held_lock+0x2c/0x110 [ 30.550906] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.551278] ? lock_is_held_type+0x9f/0x120 [ 30.551630] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.552018] ? mtree_range_walk+0x632/0x900 [ 30.552368] ? mas_walk+0x5c7/0x7c0 [ 30.552685] do_vmi_munmap+0x1f1/0x2b0 [ 30.553024] mmap_region+0x1f9/0x2660 [ 30.553343] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.553754] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.554230] ? __pfx_lock_acquire+0x10/0x10 [ 30.554606] ? __pfx_mmap_region+0x10/0x10 [ 30.554953] ? security_mmap_addr+0x7d/0xa0 [ 30.555307] ? get_unmapped_area+0x1f5/0x3f0 [ 30.555688] do_mmap+0x854/0xf00 [ 30.555987] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.556322] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.556747] ksys_mmap_pgoff+0x3af/0x500 [ 30.557083] do_syscall_64+0x3f/0x90 [ 30.557410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.557873] RIP: 0033:0x7fd763136d82 [ 30.558181] 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 [ 30.559608] RSP: 002b:00007ffdc50ae798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.560216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd763136d82 [ 30.560809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd762570000 [ 30.561358] RBP: 00007fd762570000 R08: 0000000000000009 R09: 0000000000001000 [ 30.561989] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5e3097f70 [ 30.562555] R13: 00007ffdc50ae7b0 R14: 00007ffdc50ae7e0 R15: 00007ffdc50aeb40 [ 30.563113] [ 30.563313] [ 30.563457] Allocated by task 214: [ 30.563752] kasan_save_stack+0x22/0x50 [ 30.564101] kasan_set_track+0x25/0x30 [ 30.564435] __kasan_slab_alloc+0x59/0x70 [ 30.564787] kmem_cache_alloc+0x16b/0x370 [ 30.565134] vm_area_dup+0x20/0x160 [ 30.565455] __split_vma+0x170/0x950 [ 30.565821] split_vma+0xc6/0x110 [ 30.566121] mprotect_fixup+0x8d2/0xb30 [ 30.566456] do_mprotect_pkey+0x87e/0xd40 [ 30.566807] __x64_sys_mprotect+0x78/0xc0 [ 30.567158] do_syscall_64+0x3f/0x90 [ 30.567473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.567911] [ 30.568059] Freed by task 13: [ 30.568313] kasan_save_stack+0x22/0x50 [ 30.568658] kasan_set_track+0x25/0x30 [ 30.568985] kasan_save_free_info+0x2b/0x50 [ 30.569324] __kasan_slab_free+0x10a/0x190 [ 30.569710] kmem_cache_free+0x10d/0x4d0 [ 30.570036] rcu_core+0x8c8/0x2860 [ 30.570326] __do_softirq+0x1b7/0x7d4 [ 30.570646] [ 30.570792] Last potentially related work creation: [ 30.571172] kasan_save_stack+0x22/0x50 [ 30.571495] __kasan_record_aux_stack+0x8e/0xa0 [ 30.571877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.572297] remove_vma+0x139/0x170 [ 30.572592] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.572948] do_vmi_munmap+0x1f1/0x2b0 [ 30.573259] __vm_munmap+0x138/0x3a0 [ 30.573593] __x64_sys_munmap+0x59/0x80 [ 30.573921] do_syscall_64+0x3f/0x90 [ 30.574232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.574654] [ 30.574790] The buggy address belongs to the object at ffff88800cd81e80 [ 30.574790] which belongs to the cache vm_area_struct of size 168 [ 30.575748] The buggy address is located 88 bytes inside of [ 30.575748] freed 168-byte region [ffff88800cd81e80, ffff88800cd81f28) [ 30.576695] [ 30.576842] The buggy address belongs to the physical page: [ 30.577276] page:000000008d5d9fb4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcd81 [ 30.578032] memcg:ffff88800d881e01 [ 30.578318] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.578748] page_type: 0xffffffff() [ 30.579042] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.579641] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d881e01 [ 30.580221] page dumped because: kasan: bad access detected [ 30.580654] [ 30.580797] Memory state around the buggy address: [ 30.581181] ffff88800cd81d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.581772] ffff88800cd81e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.582335] >ffff88800cd81e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.582874] ^ [ 30.583339] ffff88800cd81f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.583928] ffff88800cd81f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.584496] ================================================================== [ 30.585184] Disabling lock debugging due to kernel taint [ 32.575770] BUG: Bad rss-counter state mm:00000000a7720ee4 type:MM_FILEPAGES val:33 [ 32.576809] BUG: Bad rss-counter state mm:00000000a7720ee4 type:MM_ANONPAGES val:22 [ 32.942926] BUG: Bad rss-counter state mm:0000000030afe9ac type:MM_FILEPAGES val:33 [ 32.943637] BUG: Bad rss-counter state mm:0000000030afe9ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44295' (ECDSA) to the list of known hosts. 2023/06/21 09:30:03 fuzzer started 2023/06/21 09:30:03 dialing manager at localhost:36067 2023/06/21 09:30:03 checking machine... 2023/06/21 09:30:03 checking revisions... [ 33.545105] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:30:03 testing simple program... [ 33.580395] cgroup: Unknown subsys name 'net' [ 33.639808] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:30:03 Registers: info registers vcpu 0 RAX=ffffffff86073d0d RBX=0000000000000001 RCX=ffffffff86073d08 RDX=0000000000000000 RSI=1ffffffff0c0e7a1 RDI=ffffffff85d7a9c4 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86073d08 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000000000 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a5b 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 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=00007ff9bcffd0d0 CR3=000000000f03a000 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=2033303a30333a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a30333a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000091 RBX=00005645fd64d590 RCX=00000000000005b1 RDX=00007f047281cbe0 RSI=0000000000000000 RDI=00005645fd62f660 RBP=00005645fd64d590 RSP=00007ffc156b3970 R8 =0000000000000007 R9 =00007ffc156b3700 R10=0000000000000022 R11=0000000000000202 R12=00005645fd62b430 R13=0000000000000000 R14=00007ffc156b3d80 R15=00007ffc156b3b30 RIP=00007f04726e8740 RFL=00000206 [-----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 00007f047226a900 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=00005645fd6375f0 CR3=000000001bd9e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000