syzkaller login: [ 94.583913] BUG: Bad rss-counter state mm:00000000967acaa1 type:MM_FILEPAGES val:33 [ 94.584998] BUG: Bad rss-counter state mm:00000000967acaa1 type:MM_ANONPAGES val:22 [ 94.751990] ================================================================== [ 94.752884] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 94.753842] Read of size 8 at addr ffff88800e2c6058 by task sshd/224 [ 94.754725] [ 94.754945] CPU: 0 PID: 224 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 94.755971] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 94.756958] Call Trace: [ 94.757278] [ 94.757594] dump_stack_lvl+0x91/0xf0 [ 94.758078] print_report+0xcc/0x620 [ 94.758563] ? __virt_addr_valid+0x102/0x340 [ 94.759121] ? vma_interval_tree_remove+0xc75/0xec0 [ 94.759758] ? vma_interval_tree_remove+0xc75/0xec0 [ 94.760395] kasan_report+0xbe/0xf0 [ 94.760887] ? vma_interval_tree_remove+0xc75/0xec0 [ 94.761544] vma_interval_tree_remove+0xc75/0xec0 [ 94.762170] vma_prepare+0xc54/0x11a0 [ 94.762675] __split_vma+0x5af/0x950 [ 94.763171] ? __pfx___split_vma+0x10/0x10 [ 94.763723] ? find_held_lock+0x2c/0x110 [ 94.764261] do_vmi_align_munmap+0x2ba/0x11f0 [ 94.764849] ? lock_is_held_type+0x9f/0x120 [ 94.765411] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 94.766057] ? mtree_range_walk+0x632/0x900 [ 94.766628] ? mas_walk+0x5c7/0x7c0 [ 94.767122] do_vmi_munmap+0x1f1/0x2b0 [ 94.767630] mmap_region+0x1f9/0x2660 [ 94.768128] ? vm_mmap_pgoff+0x15c/0x3a0 [ 94.768664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 94.769412] ? __pfx_lock_acquire+0x10/0x10 [ 94.769989] ? __pfx_mmap_region+0x10/0x10 [ 94.770543] ? security_mmap_addr+0x7d/0xa0 [ 94.771102] ? get_unmapped_area+0x1f5/0x3f0 [ 94.771673] do_mmap+0x854/0xf00 [ 94.772131] vm_mmap_pgoff+0x1a6/0x3a0 [ 94.772647] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 94.773229] ksys_mmap_pgoff+0x3af/0x500 [ 94.773762] do_syscall_64+0x3f/0x90 [ 94.774263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 94.774934] RIP: 0033:0x7fab366ebd82 [ 94.775410] 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 [ 94.777659] RSP: 002b:00007ffc570d0c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 94.778620] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab366ebd82 [ 94.779495] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab35b25000 [ 94.780377] RBP: 00007fab35b25000 R08: 0000000000000009 R09: 0000000000001000 [ 94.781263] R10: 0000000000000812 R11: 0000000000000206 R12: 000056109c6c7980 [ 94.782160] R13: 00007ffc570d0c40 R14: 00007ffc570d0c70 R15: 00007ffc570d0fd0 [ 94.783057] [ 94.783359] [ 94.783584] Allocated by task 215: [ 94.784039] kasan_save_stack+0x22/0x50 [ 94.784567] kasan_set_track+0x25/0x30 [ 94.785076] __kasan_slab_alloc+0x59/0x70 [ 94.785632] kmem_cache_alloc+0x16b/0x370 [ 94.786171] vm_area_dup+0x20/0x160 [ 94.786644] __split_vma+0x170/0x950 [ 94.787126] split_vma+0xc6/0x110 [ 94.787582] mprotect_fixup+0x8d2/0xb30 [ 94.788100] do_mprotect_pkey+0x87e/0xd40 [ 94.788647] __x64_sys_mprotect+0x78/0xc0 [ 94.789191] do_syscall_64+0x3f/0x90 [ 94.789705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 94.790365] [ 94.790594] Freed by task 13: [ 94.790991] kasan_save_stack+0x22/0x50 [ 94.791511] kasan_set_track+0x25/0x30 [ 94.792022] kasan_save_free_info+0x2b/0x50 [ 94.792573] __kasan_slab_free+0x10a/0x190 [ 94.793121] kmem_cache_free+0x10d/0x4d0 [ 94.793657] rcu_core+0x8c8/0x2860 [ 94.794121] __do_softirq+0x1b7/0x7d4 [ 94.794619] [ 94.794838] Last potentially related work creation: [ 94.795444] kasan_save_stack+0x22/0x50 [ 94.795962] __kasan_record_aux_stack+0x8e/0xa0 [ 94.796553] __call_rcu_common.constprop.0+0x6a/0xb90 [ 94.797219] remove_vma+0x139/0x170 [ 94.797706] do_vmi_align_munmap+0xd4a/0x11f0 [ 94.798277] do_vmi_munmap+0x1f1/0x2b0 [ 94.798776] __vm_munmap+0x138/0x3a0 [ 94.799258] __x64_sys_munmap+0x59/0x80 [ 94.799776] do_syscall_64+0x3f/0x90 [ 94.800264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 94.800923] [ 94.801142] Second to last potentially related work creation: [ 94.801862] kasan_save_stack+0x22/0x50 [ 94.802381] __kasan_record_aux_stack+0x8e/0xa0 [ 94.802983] __call_rcu_common.constprop.0+0x6a/0xb90 [ 94.803645] remove_vma+0x139/0x170 [ 94.804109] do_vmi_align_munmap+0xd4a/0x11f0 [ 94.804693] do_vmi_munmap+0x1f1/0x2b0 [ 94.805193] mmap_region+0x1f9/0x2660 [ 94.805701] do_mmap+0x854/0xf00 [ 94.806144] vm_mmap_pgoff+0x1a6/0x3a0 [ 94.806652] ksys_mmap_pgoff+0x3af/0x500 [ 94.807167] do_syscall_64+0x3f/0x90 [ 94.807658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 94.808324] [ 94.808550] The buggy address belongs to the object at ffff88800e2c6000 [ 94.808550] which belongs to the cache vm_area_struct of size 168 [ 94.810098] The buggy address is located 88 bytes inside of [ 94.810098] freed 168-byte region [ffff88800e2c6000, ffff88800e2c60a8) [ 94.811570] [ 94.811793] The buggy address belongs to the physical page: [ 94.812475] page:00000000da82945a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2c6 [ 94.813604] memcg:ffff88800dcaa901 [ 94.814045] flags: 0x100000000000200(slab|node=0|zone=1) [ 94.814717] page_type: 0xffffffff() [ 94.815184] raw: 0100000000000200 ffff88800879fc80 ffffea0000318780 dead000000000002 [ 94.816142] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcaa901 [ 94.817088] page dumped because: kasan: bad access detected [ 94.817786] [ 94.818010] Memory state around the buggy address: [ 94.818620] ffff88800e2c5f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 94.819512] ffff88800e2c5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 94.820399] >ffff88800e2c6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 94.821282] ^ [ 94.822040] ffff88800e2c6080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 94.822941] ffff88800e2c6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 94.823830] ================================================================== [ 94.824833] Disabling lock debugging due to kernel taint [ 97.047522] BUG: Bad rss-counter state mm:000000002ad09854 type:MM_FILEPAGES val:33 [ 97.048537] BUG: Bad rss-counter state mm:000000002ad09854 type:MM_ANONPAGES val:22 [ 97.408416] BUG: Bad rss-counter state mm:0000000004096fad type:MM_FILEPAGES val:33 [ 97.409502] BUG: Bad rss-counter state mm:0000000004096fad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32377' (ECDSA) to the list of known hosts. 2023/06/19 23:30:43 fuzzer started 2023/06/19 23:30:43 dialing manager at localhost:44161 2023/06/19 23:30:44 checking machine... 2023/06/19 23:30:44 checking revisions... [ 98.098727] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:30:44 testing simple program... [ 98.140585] cgroup: Unknown subsys name 'net' [ 98.184611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:29:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880143af5b8 RCX=ffffffff81132ffe RDX=1ffff11002875ead RSI=ffff8880143b0000 RDI=ffff8880143af4d0 RBP=ffff8880143b0000 RSP=ffff8880143af4d0 R8 =0000000000000130 R9 =0000000000000000 R10=ffff8880143af520 R11=00000000000b6996 R12=ffff8880143af540 R13=ffff8880143af548 R14=ffff8880143af568 R15=ffff8880143af520 RIP=ffffffff81132f0b 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 00007fa481f5a900 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=00007fa481366da0 CR3=000000000f6e6000 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=daf6f5e6dfe29b82c94eeda3ecec2d18 XMM02=000000000012d268eff9b2d0a8fce9cb XMM03=000000000012d3382c67c8bc2e329bc3 XMM04=a80a8137b99180f300000000000ae988 XMM05=4b220ff2880a4d9b0000000000146408 XMM06=67cafca7796cb7e700000000001454b0 XMM07=fb795ef6d65770560000000000134748 XMM08=2c67c8bc2e329bc3000000000012d2d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88801592b680 RSI=ffffffff844b1bb0 RDI=0000000000000001 RBP=dffffc0000000000 RSP=ffff88801be47d68 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000100 R13=ffff88801be47e70 R14=ffffffffffffffff R15=1ffff110037c8faf RIP=ffffffff814c081b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f78640d4900 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=00007f7864c28044 CR3=000000000f0ae000 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=00000000000000000000000000000000 XMM02=debe3ed8782a87c8c5ee339e87ca46c2 XMM03=a4539974df388a08538451ea2f5e1213 XMM04=9d1b4e3d5bcba24274d144c5791fa9a3 XMM05=00000000000000000000000000000000 XMM06=9d1b4e3d5b388a08538444c52f1f1213 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000