syzkaller login: [ 49.851985] BUG: Bad rss-counter state mm:0000000081260432 type:MM_FILEPAGES val:33 [ 49.853458] BUG: Bad rss-counter state mm:0000000081260432 type:MM_ANONPAGES val:22 [ 50.013640] ================================================================== [ 50.014565] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.015503] Read of size 8 at addr ffff8880094d4d08 by task sshd/227 [ 50.016262] [ 50.016481] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.017497] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.018478] Call Trace: [ 50.018796] [ 50.019078] dump_stack_lvl+0x91/0xf0 [ 50.019571] print_report+0xcc/0x620 [ 50.020059] ? __virt_addr_valid+0x102/0x340 [ 50.020615] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.021234] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.021850] kasan_report+0xbe/0xf0 [ 50.022348] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.022984] vma_interval_tree_remove+0xc75/0xec0 [ 50.023619] vma_prepare+0xc54/0x11a0 [ 50.024110] __split_vma+0x5af/0x950 [ 50.024589] ? __pfx___split_vma+0x10/0x10 [ 50.025122] ? find_held_lock+0x2c/0x110 [ 50.025651] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.026242] ? lock_is_held_type+0x9f/0x120 [ 50.026801] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.027409] ? mtree_range_walk+0x632/0x900 [ 50.027961] ? mas_walk+0x5c7/0x7c0 [ 50.028440] do_vmi_munmap+0x1f1/0x2b0 [ 50.028946] mmap_region+0x1f9/0x2660 [ 50.029432] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.029962] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.030682] ? __pfx_lock_acquire+0x10/0x10 [ 50.031223] ? __pfx_mmap_region+0x10/0x10 [ 50.031759] ? security_mmap_addr+0x7d/0xa0 [ 50.032298] ? get_unmapped_area+0x1f5/0x3f0 [ 50.032850] do_mmap+0x854/0xf00 [ 50.033296] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.033797] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.034391] ksys_mmap_pgoff+0x3af/0x500 [ 50.034906] do_syscall_64+0x3f/0x90 [ 50.035392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.036048] RIP: 0033:0x7f1ba0fe1d82 [ 50.036509] 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 [ 50.038687] RSP: 002b:00007ffe6d678498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.039601] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ba0fe1d82 [ 50.040471] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ba041b000 [ 50.041328] RBP: 00007f1ba041b000 R08: 0000000000000009 R09: 0000000000001000 [ 50.042201] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579a0a46b20 [ 50.043049] R13: 00007ffe6d6784b0 R14: 00007ffe6d6784e0 R15: 00007ffe6d678840 [ 50.043924] [ 50.044219] [ 50.044437] Allocated by task 220: [ 50.044870] kasan_save_stack+0x22/0x50 [ 50.045381] kasan_set_track+0x25/0x30 [ 50.045884] __kasan_slab_alloc+0x59/0x70 [ 50.046419] kmem_cache_alloc+0x16b/0x370 [ 50.046938] vm_area_dup+0x20/0x160 [ 50.047393] __split_vma+0x170/0x950 [ 50.047869] split_vma+0xc6/0x110 [ 50.048313] mprotect_fixup+0x8d2/0xb30 [ 50.048824] do_mprotect_pkey+0x87e/0xd40 [ 50.049349] __x64_sys_mprotect+0x78/0xc0 [ 50.049876] do_syscall_64+0x3f/0x90 [ 50.050375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.051013] [ 50.051228] Freed by task 204: [ 50.051632] kasan_save_stack+0x22/0x50 [ 50.052140] kasan_set_track+0x25/0x30 [ 50.052636] kasan_save_free_info+0x2b/0x50 [ 50.053170] __kasan_slab_free+0x10a/0x190 [ 50.053707] kmem_cache_free+0x10d/0x4d0 [ 50.054226] rcu_core+0x8c8/0x2860 [ 50.054682] __do_softirq+0x1b7/0x7d4 [ 50.055159] [ 50.055374] Last potentially related work creation: [ 50.055960] kasan_save_stack+0x22/0x50 [ 50.056463] __kasan_record_aux_stack+0x8e/0xa0 [ 50.057037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.057726] remove_vma+0x139/0x170 [ 50.058217] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.058780] do_vmi_munmap+0x1f1/0x2b0 [ 50.059269] __vm_munmap+0x138/0x3a0 [ 50.059742] __x64_sys_munmap+0x59/0x80 [ 50.060237] do_syscall_64+0x3f/0x90 [ 50.060715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.061366] [ 50.061583] The buggy address belongs to the object at ffff8880094d4cb0 [ 50.061583] which belongs to the cache vm_area_struct of size 168 [ 50.063075] The buggy address is located 88 bytes inside of [ 50.063075] freed 168-byte region [ffff8880094d4cb0, ffff8880094d4d58) [ 50.064484] [ 50.064706] The buggy address belongs to the physical page: [ 50.065367] page:00000000a3574951 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94d4 [ 50.066468] memcg:ffff888014477701 [ 50.066893] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 50.067591] page_type: 0xffffffff() [ 50.068058] raw: 0100000000000200 ffff88800879fc80 ffffea00005fa080 dead000000000007 [ 50.068973] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014477701 [ 50.069882] page dumped because: kasan: bad access detected [ 50.070559] [ 50.070781] Memory state around the buggy address: [ 50.071361] ffff8880094d4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 50.072218] ffff8880094d4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 50.073071] >ffff8880094d4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 50.073934] ^ [ 50.074381] ffff8880094d4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 50.075244] ffff8880094d4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 50.076104] ================================================================== [ 50.077094] Disabling lock debugging due to kernel taint [ 51.957299] BUG: Bad rss-counter state mm:0000000094610a2d type:MM_FILEPAGES val:33 [ 51.958474] BUG: Bad rss-counter state mm:0000000094610a2d type:MM_ANONPAGES val:22 [ 52.361298] BUG: Bad rss-counter state mm:00000000f0592115 type:MM_FILEPAGES val:33 [ 52.362366] BUG: Bad rss-counter state mm:00000000f0592115 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45480' (ECDSA) to the list of known hosts. 2023/06/20 07:11:27 fuzzer started 2023/06/20 07:11:27 dialing manager at localhost:44161 2023/06/20 07:11:27 checking machine... 2023/06/20 07:11:27 checking revisions... [ 53.087819] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:11:28 testing simple program... [ 53.142693] cgroup: Unknown subsys name 'net' [ 53.194733] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:11:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888017f7fa00 RCX=0000000000000001 RDX=1ffff11002feff42 RSI=ffffffff8186d60e RDI=ffff888017f7fa10 RBP=ffff888017f7f9d0 RSP=ffff888017f7f918 R8 =0000000000000001 R9 =ffff888017f7f978 R10=0000000000038001 R11=00000000000229cd R12=ffff888017f7fa00 R13=0000000000000000 R14=ffff888016258000 R15=0000000000000dc0 RIP=ffffffff813ad446 RFL=00000296 [--S-AP-] 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 00007f333ae7f900 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=00007f333b434650 CR3=0000000015a7a000 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=0000000000000003 RBX=0000000000000002 RCX=ffffffff8180f43a RDX=00000000000080f4 RSI=00000000000080f4 RDI=ffffffff86507f90 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff811307c2 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 00007f5b16d2b900 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=00007f5b16187b20 CR3=000000000d786000 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=61b482e6a814fac600000000000ae988 XMM05=08295734da5e4fa20000000000134af8 XMM06=16bbfc4fa606b6250000000000133640 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000