syzkaller login: [ 30.830038] BUG: Bad rss-counter state mm:00000000860fe540 type:MM_FILEPAGES val:33 [ 30.831070] BUG: Bad rss-counter state mm:00000000860fe540 type:MM_ANONPAGES val:22 [ 31.001298] ================================================================== [ 31.002208] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.003156] Read of size 8 at addr ffff88800f741140 by task sshd/221 [ 31.003921] [ 31.004138] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.005114] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.006090] Call Trace: [ 31.006417] [ 31.006735] dump_stack_lvl+0x91/0xf0 [ 31.007265] print_report+0xcc/0x620 [ 31.007753] ? __virt_addr_valid+0x102/0x340 [ 31.008310] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.008932] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.009550] kasan_report+0xbe/0xf0 [ 31.010037] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.010657] vma_interval_tree_remove+0xc75/0xec0 [ 31.011277] vma_prepare+0xc54/0x11a0 [ 31.011753] __split_vma+0x5af/0x950 [ 31.012228] ? __pfx___split_vma+0x10/0x10 [ 31.012752] ? find_held_lock+0x2c/0x110 [ 31.013270] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.013833] ? lock_is_held_type+0x9f/0x120 [ 31.014375] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.014982] ? mtree_range_walk+0x632/0x900 [ 31.015563] ? mas_walk+0x5c7/0x7c0 [ 31.016043] do_vmi_munmap+0x1f1/0x2b0 [ 31.016535] mmap_region+0x1f9/0x2660 [ 31.017023] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.017541] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.018252] ? __pfx_lock_acquire+0x10/0x10 [ 31.018798] ? __pfx_mmap_region+0x10/0x10 [ 31.019337] ? security_mmap_addr+0x7d/0xa0 [ 31.019871] ? get_unmapped_area+0x1f5/0x3f0 [ 31.020422] do_mmap+0x854/0xf00 [ 31.020863] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.021356] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.021920] ksys_mmap_pgoff+0x3af/0x500 [ 31.022426] do_syscall_64+0x3f/0x90 [ 31.022909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.023566] RIP: 0033:0x7f393a31cd82 [ 31.024032] 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 [ 31.026161] RSP: 002b:00007ffca1130928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.027085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f393a31cd82 [ 31.027956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3939756000 [ 31.028801] RBP: 00007f3939756000 R08: 0000000000000009 R09: 0000000000001000 [ 31.029655] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612b0cf2f60 [ 31.030509] R13: 00007ffca1130940 R14: 00007ffca1130970 R15: 00007ffca1130cd0 [ 31.031376] [ 31.031671] [ 31.031894] Allocated by task 214: [ 31.032332] kasan_save_stack+0x22/0x50 [ 31.032845] kasan_set_track+0x25/0x30 [ 31.033342] __kasan_slab_alloc+0x59/0x70 [ 31.033868] kmem_cache_alloc+0x16b/0x370 [ 31.034385] vm_area_dup+0x20/0x160 [ 31.034859] __split_vma+0x170/0x950 [ 31.035344] split_vma+0xc6/0x110 [ 31.035782] mprotect_fixup+0x8d2/0xb30 [ 31.036283] do_mprotect_pkey+0x87e/0xd40 [ 31.036806] __x64_sys_mprotect+0x78/0xc0 [ 31.037334] do_syscall_64+0x3f/0x90 [ 31.037823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.038468] [ 31.038688] Freed by task 204: [ 31.039103] kasan_save_stack+0x22/0x50 [ 31.039615] kasan_set_track+0x25/0x30 [ 31.040117] kasan_save_free_info+0x2b/0x50 [ 31.040657] __kasan_slab_free+0x10a/0x190 [ 31.041201] kmem_cache_free+0x10d/0x4d0 [ 31.041719] rcu_core+0x8c8/0x2860 [ 31.042169] __do_softirq+0x1b7/0x7d4 [ 31.042664] [ 31.042878] Last potentially related work creation: [ 31.043511] kasan_save_stack+0x22/0x50 [ 31.044032] __kasan_record_aux_stack+0x8e/0xa0 [ 31.044599] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.045245] remove_vma+0x139/0x170 [ 31.045705] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.046261] do_vmi_munmap+0x1f1/0x2b0 [ 31.046744] __vm_munmap+0x138/0x3a0 [ 31.047229] __x64_sys_munmap+0x59/0x80 [ 31.047723] do_syscall_64+0x3f/0x90 [ 31.048200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.048838] [ 31.049058] The buggy address belongs to the object at ffff88800f7410e8 [ 31.049058] which belongs to the cache vm_area_struct of size 168 [ 31.050529] The buggy address is located 88 bytes inside of [ 31.050529] freed 168-byte region [ffff88800f7410e8, ffff88800f741190) [ 31.051951] [ 31.052171] The buggy address belongs to the physical page: [ 31.052841] page:000000004567bd30 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf741 [ 31.053924] memcg:ffff88801a1c9801 [ 31.054351] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.055008] page_type: 0xffffffff() [ 31.055471] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.056385] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1c9801 [ 31.057303] page dumped because: kasan: bad access detected [ 31.057959] [ 31.058178] Memory state around the buggy address: [ 31.058753] ffff88800f741000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.059646] ffff88800f741080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.060510] >ffff88800f741100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.061400] ^ [ 31.062035] ffff88800f741180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.062905] ffff88800f741200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.063773] ================================================================== [ 31.064866] Disabling lock debugging due to kernel taint [ 33.073147] BUG: Bad rss-counter state mm:00000000e5d90352 type:MM_FILEPAGES val:33 [ 33.074389] BUG: Bad rss-counter state mm:00000000e5d90352 type:MM_ANONPAGES val:22 [ 33.596849] BUG: Bad rss-counter state mm:00000000d00e89f5 type:MM_FILEPAGES val:33 [ 33.598081] BUG: Bad rss-counter state mm:00000000d00e89f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58654' (ECDSA) to the list of known hosts. 2023/06/20 14:57:01 fuzzer started 2023/06/20 14:57:02 dialing manager at localhost:36067 2023/06/20 14:57:02 checking machine... 2023/06/20 14:57:02 checking revisions... [ 34.351087] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:57:02 testing simple program... [ 34.407466] cgroup: Unknown subsys name 'net' [ 34.464957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:57:01 Registers: info registers vcpu 0 RAX=ffffffff8180c705 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff110028ebe72 RSI=ffffffff8180c705 RDI=ffff88801475f400 RBP=ffff88801475f3d0 RSP=ffff88801475f330 R8 =ffffffff86138e90 R9 =ffff88801475f378 R10=0000000000038001 R11=0000000000020d8f R12=ffff88801475f400 R13=0000000000000000 R14=ffff88801592d1c0 R15=0000000000400cc0 RIP=ffffffff84538440 RFL=00000286 [--S--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 00007f6363cdb900 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=00007f6363158e30 CR3=0000000014568000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0503506c38ae908300000000000ae988 XMM05=532075db7235a6c70000000000131a78 XMM06=c291bd5c70af25b90000000000130868 XMM07=fb795ef6d65770560000000000120b08 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff88801a1251c0 RSI=0000000000000100 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806cf09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff88801a175d90 RIP=ffffffff814c0860 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 00007f9e105cd900 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=00007f9e10b84618 CR3=000000000c5ee000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000