syzkaller login: [ 30.942381] BUG: Bad rss-counter state mm:00000000485448f7 type:MM_FILEPAGES val:33 [ 30.943586] BUG: Bad rss-counter state mm:00000000485448f7 type:MM_ANONPAGES val:22 [ 30.985826] ================================================================== [ 30.986995] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.988140] Read of size 8 at addr ffff88800e0f0c20 by task sshd/221 [ 30.989120] [ 30.989343] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.990419] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.991494] Call Trace: [ 30.991897] [ 30.992205] dump_stack_lvl+0x91/0xf0 [ 30.992818] print_report+0xcc/0x620 [ 30.993352] ? __virt_addr_valid+0x102/0x340 [ 30.993997] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.994751] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.995537] kasan_report+0xbe/0xf0 [ 30.996056] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.996680] vma_interval_tree_remove+0xc75/0xec0 [ 30.997285] vma_prepare+0xc54/0x11a0 [ 30.997762] __split_vma+0x5af/0x950 [ 30.998252] ? __pfx___split_vma+0x10/0x10 [ 30.998783] ? find_held_lock+0x2c/0x110 [ 30.999306] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.999868] ? lock_is_held_type+0x9f/0x120 [ 31.000413] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.001021] ? mtree_range_walk+0x632/0x900 [ 31.001582] ? mas_walk+0x5c7/0x7c0 [ 31.002059] do_vmi_munmap+0x1f1/0x2b0 [ 31.002561] mmap_region+0x1f9/0x2660 [ 31.003045] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.003554] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.004275] ? __pfx_lock_acquire+0x10/0x10 [ 31.004811] ? __pfx_mmap_region+0x10/0x10 [ 31.005345] ? security_mmap_addr+0x7d/0xa0 [ 31.005877] ? get_unmapped_area+0x1f5/0x3f0 [ 31.006448] do_mmap+0x854/0xf00 [ 31.006899] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.007402] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.007969] ksys_mmap_pgoff+0x3af/0x500 [ 31.008479] do_syscall_64+0x3f/0x90 [ 31.008970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.009618] RIP: 0033:0x7fcace045d82 [ 31.010089] 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 [ 31.012216] RSP: 002b:00007ffd850ef9c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.013124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcace045d82 [ 31.013975] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcacd47f000 [ 31.014837] RBP: 00007fcacd47f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.015684] R10: 0000000000000812 R11: 0000000000000206 R12: 000055562adaaec0 [ 31.016540] R13: 00007ffd850ef9e0 R14: 00007ffd850efa10 R15: 00007ffd850efd70 [ 31.017399] [ 31.017691] [ 31.017908] Allocated by task 214: [ 31.018354] kasan_save_stack+0x22/0x50 [ 31.018863] kasan_set_track+0x25/0x30 [ 31.019359] __kasan_slab_alloc+0x59/0x70 [ 31.019884] kmem_cache_alloc+0x16b/0x370 [ 31.020415] vm_area_dup+0x20/0x160 [ 31.020872] __split_vma+0x170/0x950 [ 31.021342] split_vma+0xc6/0x110 [ 31.021785] mprotect_fixup+0x8d2/0xb30 [ 31.022302] do_mprotect_pkey+0x87e/0xd40 [ 31.022821] __x64_sys_mprotect+0x78/0xc0 [ 31.023343] do_syscall_64+0x3f/0x90 [ 31.023816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.024463] [ 31.024677] Freed by task 214: [ 31.025079] kasan_save_stack+0x22/0x50 [ 31.025586] kasan_set_track+0x25/0x30 [ 31.026104] kasan_save_free_info+0x2b/0x50 [ 31.026640] __kasan_slab_free+0x10a/0x190 [ 31.027173] kmem_cache_free+0x10d/0x4d0 [ 31.027679] rcu_core+0x8c8/0x2860 [ 31.028124] __do_softirq+0x1b7/0x7d4 [ 31.028612] [ 31.028834] Last potentially related work creation: [ 31.029423] kasan_save_stack+0x22/0x50 [ 31.029933] __kasan_record_aux_stack+0x8e/0xa0 [ 31.030518] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.031247] remove_vma+0x139/0x170 [ 31.031703] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.032266] do_vmi_munmap+0x1f1/0x2b0 [ 31.032749] __vm_munmap+0x138/0x3a0 [ 31.033217] __x64_sys_munmap+0x59/0x80 [ 31.033716] do_syscall_64+0x3f/0x90 [ 31.034210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.034867] [ 31.035080] Second to last potentially related work creation: [ 31.035775] kasan_save_stack+0x22/0x50 [ 31.036290] __kasan_record_aux_stack+0x8e/0xa0 [ 31.036877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.037525] remove_vma+0x139/0x170 [ 31.037979] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.038554] do_vmi_munmap+0x1f1/0x2b0 [ 31.039059] __vm_munmap+0x138/0x3a0 [ 31.039532] elf_map+0x26f/0x310 [ 31.039977] load_elf_binary+0x3417/0x5030 [ 31.040518] bprm_execve+0x803/0x1940 [ 31.040994] do_execveat_common+0x734/0x8e0 [ 31.041524] __x64_sys_execve+0x93/0xc0 [ 31.042020] do_syscall_64+0x3f/0x90 [ 31.042510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.043162] [ 31.043378] The buggy address belongs to the object at ffff88800e0f0bc8 [ 31.043378] which belongs to the cache vm_area_struct of size 168 [ 31.044840] The buggy address is located 88 bytes inside of [ 31.044840] freed 168-byte region [ffff88800e0f0bc8, ffff88800e0f0c70) [ 31.046268] [ 31.046485] The buggy address belongs to the physical page: [ 31.047135] page:000000001503ac43 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0f0 [ 31.048211] memcg:ffff88800c574e01 [ 31.048641] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.049295] page_type: 0xffffffff() [ 31.049750] raw: 0100000000000200 ffff8880087a0c80 ffffea0000515800 dead000000000002 [ 31.050674] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c574e01 [ 31.051585] page dumped because: kasan: bad access detected [ 31.052253] [ 31.052470] Memory state around the buggy address: [ 31.053057] ffff88800e0f0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.053923] ffff88800e0f0b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.054792] >ffff88800e0f0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.055636] ^ [ 31.056168] ffff88800e0f0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.057034] ffff88800e0f0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.057883] ================================================================== [ 31.058865] Disabling lock debugging due to kernel taint [ 33.740116] BUG: Bad rss-counter state mm:00000000eeb18f62 type:MM_FILEPAGES val:33 [ 33.741059] BUG: Bad rss-counter state mm:00000000eeb18f62 type:MM_ANONPAGES val:22 [ 34.150431] BUG: Bad rss-counter state mm:00000000ccb381fb type:MM_FILEPAGES val:33 [ 34.151114] BUG: Bad rss-counter state mm:00000000ccb381fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8124' (ECDSA) to the list of known hosts. 2023/06/21 07:44:51 fuzzer started 2023/06/21 07:44:51 dialing manager at localhost:36067 2023/06/21 07:44:51 checking machine... 2023/06/21 07:44:51 checking revisions... [ 34.771809] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:44:51 testing simple program... [ 34.818133] cgroup: Unknown subsys name 'net' [ 34.848483] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:44:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8118ddc2 RDX=00000000000018de RSI=00000000000018dd RDI=ffffffff864efd68 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff811307e3 RFL=00000212 [----A--] 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 00007f36c3e5e900 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=00007ffefee80000 CR3=000000001a06a000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=22286e694e03463220322e322e302e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f95046ba000 CR3=0000000009f0e000 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=78827fafcf6a5b855e44c027609b74fa XMM02=000000000011aab8ec2efd57dc4c00df XMM03=0000000000122438eff47c6eda3a9b5a XMM04=6676b342bbfdfa6300000000000ae988 XMM05=996cb4b2d4e7e8620000000000134800 XMM06=c291bd5c70af25b900000000001338a0 XMM07=e042d86d42eb936e00000000001226b8 XMM08=eff47c6eda3a9b5a000000000011ab18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000