syzkaller login: [ 33.753784] BUG: Bad rss-counter state mm:0000000067b8371a type:MM_FILEPAGES val:33 [ 33.755391] BUG: Bad rss-counter state mm:0000000067b8371a type:MM_ANONPAGES val:22 [ 33.914411] ================================================================== [ 33.915696] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.917165] Read of size 8 at addr ffff888018ea7058 by task sshd/220 [ 33.918282] [ 33.918595] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.919803] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.920980] Call Trace: [ 33.921359] [ 33.921697] dump_stack_lvl+0x91/0xf0 [ 33.922286] print_report+0xcc/0x620 [ 33.922864] ? __virt_addr_valid+0x102/0x340 [ 33.923531] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.924262] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.925003] kasan_report+0xbe/0xf0 [ 33.925564] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.926313] vma_interval_tree_remove+0xc75/0xec0 [ 33.927041] vma_prepare+0xc54/0x11a0 [ 33.927611] __split_vma+0x5af/0x950 [ 33.928182] ? __pfx___split_vma+0x10/0x10 [ 33.928817] ? find_held_lock+0x2c/0x110 [ 33.929442] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.930117] ? lock_is_held_type+0x9f/0x120 [ 33.930794] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.931525] ? mtree_range_walk+0x632/0x900 [ 33.932191] ? mas_walk+0x5c7/0x7c0 [ 33.932757] do_vmi_munmap+0x1f1/0x2b0 [ 33.933342] mmap_region+0x1f9/0x2660 [ 33.933922] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.934544] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.935405] ? __pfx_lock_acquire+0x10/0x10 [ 33.936045] ? __pfx_mmap_region+0x10/0x10 [ 33.936684] ? security_mmap_addr+0x7d/0xa0 [ 33.937326] ? get_unmapped_area+0x1f5/0x3f0 [ 33.937990] do_mmap+0x854/0xf00 [ 33.938519] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.939110] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.939785] ksys_mmap_pgoff+0x3af/0x500 [ 33.940393] do_syscall_64+0x3f/0x90 [ 33.940967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.941741] RIP: 0033:0x7f430be5ed82 [ 33.942310] 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 [ 33.944888] RSP: 002b:00007fffd6651458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.945980] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f430be5ed82 [ 33.947018] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f430b298000 [ 33.948038] RBP: 00007f430b298000 R08: 0000000000000009 R09: 0000000000001000 [ 33.948839] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef5bdd9ec0 [ 33.949655] R13: 00007fffd6651470 R14: 00007fffd66514a0 R15: 00007fffd6651800 [ 33.950502] [ 33.950783] [ 33.951024] Allocated by task 213: [ 33.951439] kasan_save_stack+0x22/0x50 [ 33.951941] kasan_set_track+0x25/0x30 [ 33.952429] __kasan_slab_alloc+0x59/0x70 [ 33.952944] kmem_cache_alloc+0x16b/0x370 [ 33.953438] vm_area_dup+0x20/0x160 [ 33.953878] __split_vma+0x170/0x950 [ 33.954346] split_vma+0xc6/0x110 [ 33.954769] mprotect_fixup+0x8d2/0xb30 [ 33.955266] do_mprotect_pkey+0x87e/0xd40 [ 33.955769] __x64_sys_mprotect+0x78/0xc0 [ 33.956289] do_syscall_64+0x3f/0x90 [ 33.956749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.957384] [ 33.957600] Freed by task 213: [ 33.958006] kasan_save_stack+0x22/0x50 [ 33.958508] kasan_set_track+0x25/0x30 [ 33.959000] kasan_save_free_info+0x2b/0x50 [ 33.959520] __kasan_slab_free+0x10a/0x190 [ 33.960078] kmem_cache_free+0x10d/0x4d0 [ 33.960573] rcu_core+0x8c8/0x2860 [ 33.961031] __do_softirq+0x1b7/0x7d4 [ 33.961494] [ 33.961703] Last potentially related work creation: [ 33.962316] kasan_save_stack+0x22/0x50 [ 33.962811] __kasan_record_aux_stack+0x8e/0xa0 [ 33.963386] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.964043] remove_vma+0x139/0x170 [ 33.964490] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.965078] do_vmi_munmap+0x1f1/0x2b0 [ 33.965553] __vm_munmap+0x138/0x3a0 [ 33.966016] __x64_sys_munmap+0x59/0x80 [ 33.966514] do_syscall_64+0x3f/0x90 [ 33.966991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.967609] [ 33.967821] The buggy address belongs to the object at ffff888018ea7000 [ 33.967821] which belongs to the cache vm_area_struct of size 168 [ 33.969245] The buggy address is located 88 bytes inside of [ 33.969245] freed 168-byte region [ffff888018ea7000, ffff888018ea70a8) [ 33.970619] [ 33.970832] The buggy address belongs to the physical page: [ 33.971471] page:0000000025f4f801 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ea7 [ 33.972543] memcg:ffff88800fd2ce01 [ 33.972971] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.973592] page_type: 0xffffffff() [ 33.974044] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.974947] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd2ce01 [ 33.975858] page dumped because: kasan: bad access detected [ 33.976554] [ 33.976771] Memory state around the buggy address: [ 33.977393] ffff888018ea6f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.978282] ffff888018ea6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.979137] >ffff888018ea7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.979982] ^ [ 33.980697] ffff888018ea7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.981562] ffff888018ea7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.982438] ================================================================== [ 33.983573] Disabling lock debugging due to kernel taint [ 36.016246] BUG: Bad rss-counter state mm:000000008049d2c5 type:MM_FILEPAGES val:33 [ 36.017656] BUG: Bad rss-counter state mm:000000008049d2c5 type:MM_ANONPAGES val:22 [ 36.353802] BUG: Bad rss-counter state mm:00000000f80941d7 type:MM_FILEPAGES val:33 [ 36.355656] BUG: Bad rss-counter state mm:00000000f80941d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1695' (ECDSA) to the list of known hosts. 2023/06/19 15:39:26 fuzzer started 2023/06/19 15:39:27 dialing manager at localhost:44161 2023/06/19 15:39:27 checking machine... 2023/06/19 15:39:27 checking revisions... [ 37.055734] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:39:27 testing simple program... [ 37.104429] cgroup: Unknown subsys name 'net' [ 37.158225] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:39:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81acc19e RDX=ffff88800dc70000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff8880197949f8 RSP=ffff888018e87968 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=ffffffff8493bb20 R14=0000000000001723 R15=ffff88800f64e000 RIP=ffffffff814c0388 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 00007f1c0b8f0700 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=00007f20015ee0b0 CR3=0000000015bba000 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=2036323a39333a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a39333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800d30ca00 RCX=ffffffff81370fff RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88806cf09de0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806cf35000 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff81371007 RFL=00000047 [---Z-PC] 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 00007fa89c11a900 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=00007fa89b538c30 CR3=000000000ca9a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a01c94955233ea6200000000000ae988 XMM05=b2ab7443af2a8ddc0000000000135578 XMM06=4fda316b135da52b0000000000134368 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000