syzkaller login: [ 32.149326] BUG: Bad rss-counter state mm:0000000077cecc3a type:MM_FILEPAGES val:33 [ 32.150715] BUG: Bad rss-counter state mm:0000000077cecc3a type:MM_ANONPAGES val:22 [ 32.296477] ================================================================== [ 32.297340] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.298226] Read of size 8 at addr ffff88800e915058 by task sshd/220 [ 32.298956] [ 32.299168] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.300085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.300998] Call Trace: [ 32.301324] <TASK> [ 32.301595] dump_stack_lvl+0x91/0xf0 [ 32.302075] print_report+0xcc/0x620 [ 32.302537] ? __virt_addr_valid+0x102/0x340 [ 32.303067] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.303653] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.304233] kasan_report+0xbe/0xf0 [ 32.304691] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.305297] vma_interval_tree_remove+0xc75/0xec0 [ 32.305907] vma_prepare+0xc54/0x11a0 [ 32.306398] __split_vma+0x5af/0x950 [ 32.306868] ? __pfx___split_vma+0x10/0x10 [ 32.307394] ? find_held_lock+0x2c/0x110 [ 32.307921] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.308490] ? lock_is_held_type+0x9f/0x120 [ 32.309032] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.309655] ? mtree_range_walk+0x632/0x900 [ 32.310212] ? mas_walk+0x5c7/0x7c0 [ 32.310685] do_vmi_munmap+0x1f1/0x2b0 [ 32.311187] mmap_region+0x1f9/0x2660 [ 32.311667] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.312184] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.312909] ? __pfx_lock_acquire+0x10/0x10 [ 32.313463] ? __pfx_mmap_region+0x10/0x10 [ 32.313998] ? security_mmap_addr+0x7d/0xa0 [ 32.314533] ? get_unmapped_area+0x1f5/0x3f0 [ 32.315088] do_mmap+0x854/0xf00 [ 32.315529] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.316019] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.316577] ksys_mmap_pgoff+0x3af/0x500 [ 32.317095] do_syscall_64+0x3f/0x90 [ 32.317578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.318218] RIP: 0033:0x7f9bbae43d82 [ 32.318687] 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 [ 32.320841] RSP: 002b:00007ffcde0789d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.321772] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9bbae43d82 [ 32.322635] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9bba27d000 [ 32.323492] RBP: 00007f9bba27d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.324344] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c30766b20 [ 32.325214] R13: 00007ffcde0789f0 R14: 00007ffcde078a20 R15: 00007ffcde078d80 [ 32.326073] </TASK> [ 32.326367] [ 32.326584] Allocated by task 213: [ 32.327011] kasan_save_stack+0x22/0x50 [ 32.327510] kasan_set_track+0x25/0x30 [ 32.327999] __kasan_slab_alloc+0x59/0x70 [ 32.328524] kmem_cache_alloc+0x16b/0x370 [ 32.329040] vm_area_dup+0x20/0x160 [ 32.329509] __split_vma+0x170/0x950 [ 32.329965] split_vma+0xc6/0x110 [ 32.330409] mprotect_fixup+0x8d2/0xb30 [ 32.330916] do_mprotect_pkey+0x87e/0xd40 [ 32.331441] __x64_sys_mprotect+0x78/0xc0 [ 32.331967] do_syscall_64+0x3f/0x90 [ 32.332451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.333095] [ 32.333313] Freed by task 213: [ 32.333711] kasan_save_stack+0x22/0x50 [ 32.334222] kasan_set_track+0x25/0x30 [ 32.334726] kasan_save_free_info+0x2b/0x50 [ 32.335256] __kasan_slab_free+0x10a/0x190 [ 32.335793] kmem_cache_free+0x10d/0x4d0 [ 32.336309] rcu_core+0x8c8/0x2860 [ 32.336763] __do_softirq+0x1b7/0x7d4 [ 32.337250] [ 32.337469] Last potentially related work creation: [ 32.338056] kasan_save_stack+0x22/0x50 [ 32.338562] __kasan_record_aux_stack+0x8e/0xa0 [ 32.339137] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.339789] remove_vma+0x139/0x170 [ 32.340241] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.340795] do_vmi_munmap+0x1f1/0x2b0 [ 32.341309] __vm_munmap+0x138/0x3a0 [ 32.341787] __x64_sys_munmap+0x59/0x80 [ 32.342289] do_syscall_64+0x3f/0x90 [ 32.342758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.343399] [ 32.343613] The buggy address belongs to the object at ffff88800e915000 [ 32.343613] which belongs to the cache vm_area_struct of size 168 [ 32.345092] The buggy address is located 88 bytes inside of [ 32.345092] freed 168-byte region [ffff88800e915000, ffff88800e9150a8) [ 32.346505] [ 32.346725] The buggy address belongs to the physical page: [ 32.347394] page:000000003cd5b724 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe915 [ 32.348488] memcg:ffff88800eeb2701 [ 32.348913] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.349557] page_type: 0xffffffff() [ 32.350004] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.350930] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeb2701 [ 32.351840] page dumped because: kasan: bad access detected [ 32.352502] [ 32.352718] Memory state around the buggy address: [ 32.353325] ffff88800e914f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.354192] ffff88800e914f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.355058] >ffff88800e915000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.355920] ^ [ 32.356657] ffff88800e915080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.357531] ffff88800e915100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.358387] ================================================================== [ 32.359660] Disabling lock debugging due to kernel taint [ 34.578022] BUG: Bad rss-counter state mm:00000000cc3f0249 type:MM_FILEPAGES val:33 [ 34.579010] BUG: Bad rss-counter state mm:00000000cc3f0249 type:MM_ANONPAGES val:22 [ 34.961989] BUG: Bad rss-counter state mm:000000002b3dc1f5 type:MM_FILEPAGES val:33 [ 34.963063] BUG: Bad rss-counter state mm:000000002b3dc1f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62171' (ECDSA) to the list of known hosts. 2023/06/19 12:05:08 fuzzer started 2023/06/19 12:05:08 dialing manager at localhost:44161 2023/06/19 12:05:08 checking machine... 2023/06/19 12:05:08 checking revisions... [ 35.668780] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:05:08 testing simple program... [ 35.718511] cgroup: Unknown subsys name 'net' [ 35.772322] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:05:07 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800fe53680 RCX=0000000000000000 RDX=ffff88800fe53680 RSI=ffffffff818ad8dc RDI=0000000000000005 RBP=1ffff11001fbff83 RSP=ffff88800fdffc10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000080000 R11=0000000000000001 R12=ffff888008dc5b80 R13=ffff88800fdffdf0 R14=0000000000000001 R15=ffff88800fdffc48 RIP=ffffffff814c07eb RFL=00000293 [--S-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 00007efe16bd9900 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=00007efe171910b0 CR3=0000000009560000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f6dfb1e2010 CR3=000000000c5aa000 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=6a39841d6681a9bd1a4291cfadd028b7 XMM02=000000000011d098ec2efd57dc4c00df XMM03=0000000000124610ade74c6b2215856a XMM04=96cb83377141980700000000000ae988 XMM05=19e9129bd510f23500000000001341b0 XMM06=650df58804c304030000000000133018 XMM07=e042d86d42eb936e0000000000124890 XMM08=ade74c6b2215856a000000000011d0f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000