syzkaller login: [ 30.127178] BUG: Bad rss-counter state mm:0000000098cfc39c type:MM_FILEPAGES val:33 [ 30.127815] BUG: Bad rss-counter state mm:0000000098cfc39c type:MM_ANONPAGES val:22 [ 30.339316] ================================================================== [ 30.339876] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.340508] Read of size 8 at addr ffff88800e17a6b0 by task sshd/221 [ 30.341203] [ 30.341343] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.341890] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.342565] Call Trace: [ 30.342764] [ 30.342945] dump_stack_lvl+0x91/0xf0 [ 30.343311] print_report+0xcc/0x620 [ 30.343640] ? __virt_addr_valid+0x102/0x340 [ 30.343998] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.344441] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.344862] kasan_report+0xbe/0xf0 [ 30.345242] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.345706] vma_interval_tree_remove+0xc75/0xec0 [ 30.346180] vma_prepare+0xc54/0x11a0 [ 30.346510] __split_vma+0x5af/0x950 [ 30.346841] ? __pfx___split_vma+0x10/0x10 [ 30.347279] ? find_held_lock+0x2c/0x110 [ 30.347675] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.348041] ? lock_is_held_type+0x9f/0x120 [ 30.348459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.348886] ? mtree_range_walk+0x632/0x900 [ 30.349280] ? mas_walk+0x5c7/0x7c0 [ 30.349581] do_vmi_munmap+0x1f1/0x2b0 [ 30.349898] mmap_region+0x1f9/0x2660 [ 30.350242] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.350560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.350990] ? __pfx_lock_acquire+0x10/0x10 [ 30.351367] ? __pfx_mmap_region+0x10/0x10 [ 30.351685] ? security_mmap_addr+0x7d/0xa0 [ 30.352017] ? get_unmapped_area+0x1f5/0x3f0 [ 30.352401] do_mmap+0x854/0xf00 [ 30.352699] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.353023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.353430] ksys_mmap_pgoff+0x3af/0x500 [ 30.353742] do_syscall_64+0x3f/0x90 [ 30.354067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.354552] RIP: 0033:0x7f16f143ed82 [ 30.354832] 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 [ 30.356214] RSP: 002b:00007ffcf582e4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.356796] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16f143ed82 [ 30.357349] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16f0878000 [ 30.357885] RBP: 00007f16f0878000 R08: 0000000000000009 R09: 0000000000001000 [ 30.358520] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602f159eec0 [ 30.359062] R13: 00007ffcf582e4d0 R14: 00007ffcf582e500 R15: 00007ffcf582e860 [ 30.359647] [ 30.359842] [ 30.359983] Allocated by task 212: [ 30.360245] kasan_save_stack+0x22/0x50 [ 30.360619] kasan_set_track+0x25/0x30 [ 30.360938] __kasan_slab_alloc+0x59/0x70 [ 30.361278] kmem_cache_alloc+0x16b/0x370 [ 30.361667] vm_area_dup+0x20/0x160 [ 30.361995] __split_vma+0x170/0x950 [ 30.362321] split_vma+0xc6/0x110 [ 30.362676] mprotect_fixup+0x8d2/0xb30 [ 30.362998] do_mprotect_pkey+0x87e/0xd40 [ 30.363357] __x64_sys_mprotect+0x78/0xc0 [ 30.363773] do_syscall_64+0x3f/0x90 [ 30.364103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.364599] [ 30.364746] Freed by task 203: [ 30.365005] kasan_save_stack+0x22/0x50 [ 30.365339] kasan_set_track+0x25/0x30 [ 30.365720] kasan_save_free_info+0x2b/0x50 [ 30.366115] __kasan_slab_free+0x10a/0x190 [ 30.366536] kmem_cache_free+0x10d/0x4d0 [ 30.366892] rcu_core+0x8c8/0x2860 [ 30.367213] __do_softirq+0x1b7/0x7d4 [ 30.367608] [ 30.367759] Last potentially related work creation: [ 30.368165] kasan_save_stack+0x22/0x50 [ 30.368553] __kasan_record_aux_stack+0x8e/0xa0 [ 30.368963] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.369406] remove_vma+0x139/0x170 [ 30.369772] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.370184] do_vmi_munmap+0x1f1/0x2b0 [ 30.370532] __vm_munmap+0x138/0x3a0 [ 30.370906] __x64_sys_munmap+0x59/0x80 [ 30.371249] do_syscall_64+0x3f/0x90 [ 30.371635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.372075] [ 30.372230] Second to last potentially related work creation: [ 30.372764] kasan_save_stack+0x22/0x50 [ 30.373121] __kasan_record_aux_stack+0x8e/0xa0 [ 30.373498] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.373986] remove_vma+0x139/0x170 [ 30.374285] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.374697] do_vmi_munmap+0x1f1/0x2b0 [ 30.375014] mmap_region+0x1f9/0x2660 [ 30.375328] do_mmap+0x854/0xf00 [ 30.375613] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.376000] ksys_mmap_pgoff+0x3af/0x500 [ 30.376341] do_syscall_64+0x3f/0x90 [ 30.376711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.377148] [ 30.377300] The buggy address belongs to the object at ffff88800e17a658 [ 30.377300] which belongs to the cache vm_area_struct of size 168 [ 30.378348] The buggy address is located 88 bytes inside of [ 30.378348] freed 168-byte region [ffff88800e17a658, ffff88800e17a700) [ 30.379354] [ 30.379514] The buggy address belongs to the physical page: [ 30.380023] page:00000000a764bbc1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe17a [ 30.380828] memcg:ffff88800ed49801 [ 30.381126] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.381608] page_type: 0xffffffff() [ 30.381990] raw: 0100000000000200 ffff8880087a0c80 ffffea0000356900 dead000000000005 [ 30.382618] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed49801 [ 30.383263] page dumped because: kasan: bad access detected [ 30.383692] [ 30.383903] Memory state around the buggy address: [ 30.384314] ffff88800e17a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.384955] ffff88800e17a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.385547] >ffff88800e17a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.386209] ^ [ 30.386607] ffff88800e17a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.387231] ffff88800e17a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.387803] ================================================================== [ 30.388777] Disabling lock debugging due to kernel taint [ 33.004208] BUG: Bad rss-counter state mm:0000000062660814 type:MM_FILEPAGES val:33 [ 33.004830] BUG: Bad rss-counter state mm:0000000062660814 type:MM_ANONPAGES val:22 [ 33.618040] BUG: Bad rss-counter state mm:000000006cb72ee3 type:MM_FILEPAGES val:33 [ 33.618682] BUG: Bad rss-counter state mm:000000006cb72ee3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10318' (ECDSA) to the list of known hosts. 2023/06/21 10:09:36 fuzzer started 2023/06/21 10:09:37 dialing manager at localhost:36067 2023/06/21 10:09:37 checking machine... 2023/06/21 10:09:37 checking revisions... [ 34.477257] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:09:37 testing simple program... [ 34.536764] cgroup: Unknown subsys name 'net' [ 34.643866] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:09:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fad1683d328 CR3=000000000de12000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888014601f34 RBP=ffff888014601b40 RSP=ffff88800f8cf8d0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00007f7c6f4ff000 R12=ffff888014601b40 R13=dffffc0000000000 R14=0000000000000000 R15=ffffffff81165382 RIP=ffffffff81374525 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 00007f7c6f48e900 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=00007f7c6f48e6f8 CR3=000000000c622000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000