syzkaller login: [ 38.763016] BUG: Bad rss-counter state mm:000000003727fc39 type:MM_FILEPAGES val:33 [ 38.764488] BUG: Bad rss-counter state mm:000000003727fc39 type:MM_ANONPAGES val:22 [ 38.998211] ================================================================== [ 38.999247] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.000277] Read of size 8 at addr ffff88800c6c5228 by task sshd/218 [ 39.001233] [ 39.001514] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.002449] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.003546] Call Trace: [ 39.003889] [ 39.004195] dump_stack_lvl+0x91/0xf0 [ 39.004723] print_report+0xcc/0x620 [ 39.005255] ? __virt_addr_valid+0x102/0x340 [ 39.005850] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.006518] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.007195] kasan_report+0xbe/0xf0 [ 39.007727] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.008512] vma_interval_tree_remove+0xc75/0xec0 [ 39.009170] vma_prepare+0xc54/0x11a0 [ 39.009693] __split_vma+0x5af/0x950 [ 39.010216] ? __pfx___split_vma+0x10/0x10 [ 39.010790] ? find_held_lock+0x2c/0x110 [ 39.011387] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.012006] ? lock_is_held_type+0x9f/0x120 [ 39.012594] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.013263] ? mtree_range_walk+0x632/0x900 [ 39.013869] ? mas_walk+0x5c7/0x7c0 [ 39.014389] do_vmi_munmap+0x1f1/0x2b0 [ 39.014938] mmap_region+0x1f9/0x2660 [ 39.015461] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.016016] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.016780] ? __pfx_lock_acquire+0x10/0x10 [ 39.017359] ? __pfx_mmap_region+0x10/0x10 [ 39.017935] ? security_mmap_addr+0x7d/0xa0 [ 39.018504] ? get_unmapped_area+0x1f5/0x3f0 [ 39.019104] do_mmap+0x854/0xf00 [ 39.019578] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.020115] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.020722] ksys_mmap_pgoff+0x3af/0x500 [ 39.021272] do_syscall_64+0x3f/0x90 [ 39.021788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.022489] RIP: 0033:0x7f872431bd82 [ 39.023002] 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 [ 39.025282] RSP: 002b:00007ffdfb733ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.026250] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f872431bd82 [ 39.027170] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8723755000 [ 39.028093] RBP: 00007f8723755000 R08: 0000000000000009 R09: 0000000000001000 [ 39.029005] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559931b47ec0 [ 39.029905] R13: 00007ffdfb733f10 R14: 00007ffdfb733f40 R15: 00007ffdfb7342a0 [ 39.030829] [ 39.031151] [ 39.031380] Allocated by task 211: [ 39.031841] kasan_save_stack+0x22/0x50 [ 39.032383] kasan_set_track+0x25/0x30 [ 39.032904] __kasan_slab_alloc+0x59/0x70 [ 39.033462] kmem_cache_alloc+0x16b/0x370 [ 39.034022] vm_area_dup+0x20/0x160 [ 39.034511] __split_vma+0x170/0x950 [ 39.035023] split_vma+0xc6/0x110 [ 39.035504] mprotect_fixup+0x8d2/0xb30 [ 39.036037] do_mprotect_pkey+0x87e/0xd40 [ 39.036595] __x64_sys_mprotect+0x78/0xc0 [ 39.037162] do_syscall_64+0x3f/0x90 [ 39.037674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.038360] [ 39.038591] Freed by task 211: [ 39.039023] kasan_save_stack+0x22/0x50 [ 39.039564] kasan_set_track+0x25/0x30 [ 39.040096] kasan_save_free_info+0x2b/0x50 [ 39.040679] __kasan_slab_free+0x10a/0x190 [ 39.041254] kmem_cache_free+0x10d/0x4d0 [ 39.041802] rcu_core+0x8c8/0x2860 [ 39.042346] __do_softirq+0x1b7/0x7d4 [ 39.042870] [ 39.043103] Last potentially related work creation: [ 39.043722] kasan_save_stack+0x22/0x50 [ 39.044258] __kasan_record_aux_stack+0x8e/0xa0 [ 39.044869] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.045554] remove_vma+0x139/0x170 [ 39.046035] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.046628] do_vmi_munmap+0x1f1/0x2b0 [ 39.047148] __vm_munmap+0x138/0x3a0 [ 39.047645] __x64_sys_munmap+0x59/0x80 [ 39.048173] do_syscall_64+0x3f/0x90 [ 39.048675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.049370] [ 39.049600] Second to last potentially related work creation: [ 39.050329] kasan_save_stack+0x22/0x50 [ 39.050886] __kasan_record_aux_stack+0x8e/0xa0 [ 39.051497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.052177] remove_vma+0x139/0x170 [ 39.052647] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.053245] do_vmi_munmap+0x1f1/0x2b0 [ 39.053764] __vm_munmap+0x138/0x3a0 [ 39.054266] elf_map+0x26f/0x310 [ 39.054739] load_elf_binary+0x3417/0x5030 [ 39.055311] bprm_execve+0x803/0x1940 [ 39.055815] do_execveat_common+0x734/0x8e0 [ 39.056379] __x64_sys_execve+0x93/0xc0 [ 39.056900] do_syscall_64+0x3f/0x90 [ 39.057401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.058085] [ 39.058310] The buggy address belongs to the object at ffff88800c6c51d0 [ 39.058310] which belongs to the cache vm_area_struct of size 168 [ 39.059955] The buggy address is located 88 bytes inside of [ 39.059955] freed 168-byte region [ffff88800c6c51d0, ffff88800c6c5278) [ 39.061581] [ 39.061828] The buggy address belongs to the physical page: [ 39.062590] page:00000000c1a95536 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6c5 [ 39.063860] memcg:ffff88800e88ba01 [ 39.064355] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.065096] page_type: 0xffffffff() [ 39.065614] raw: 0100000000000200 ffff8880087a0c80 ffffea0000357b00 dead000000000008 [ 39.066667] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e88ba01 [ 39.067729] page dumped because: kasan: bad access detected [ 39.068490] [ 39.068740] Memory state around the buggy address: [ 39.069412] ffff88800c6c5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.070391] ffff88800c6c5180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.071363] >ffff88800c6c5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.072263] ^ [ 39.072850] ffff88800c6c5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.073756] ffff88800c6c5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.074662] ================================================================== [ 39.075878] Disabling lock debugging due to kernel taint [ 41.088142] BUG: Bad rss-counter state mm:000000005c6d1174 type:MM_FILEPAGES val:33 [ 41.089265] BUG: Bad rss-counter state mm:000000005c6d1174 type:MM_ANONPAGES val:22 [ 41.601170] BUG: Bad rss-counter state mm:00000000e7b000ad type:MM_FILEPAGES val:33 [ 41.602296] BUG: Bad rss-counter state mm:00000000e7b000ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54030' (ECDSA) to the list of known hosts. 2023/06/20 23:29:29 fuzzer started 2023/06/20 23:29:30 dialing manager at localhost:36067 2023/06/20 23:29:30 checking machine... 2023/06/20 23:29:30 checking revisions... [ 42.317446] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:29:30 testing simple program... [ 42.394102] cgroup: Unknown subsys name 'net' [ 42.475842] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:29:29 Registers: info registers vcpu 0 RAX=000000002156cf86 RBX=00000000e4505601 RCX=ffff88801620f694 RDX=000000000000000d RSI=000000000000000b RDI=0000000037ac185a RBP=0000000000000000 RSP=ffff88801620f5f0 R8 =00000000a06a7b4a R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88801620f658 R15=000000000000000d RIP=ffffffff82270472 RFL=00000283 [--S---C] 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 00007f38e8bce700 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=00007ff61eb750b0 CR3=000000001a89a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732039323a3932 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323536 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=ffff88806cf09f80 RCX=0000000000000001 RDX=ffff88806cf09f88 RSI=ffff88806cf09f50 RDI=ffff88806cf09a60 RBP=ffff88806cf02000 RSP=ffff88806cf099e0 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09f50 R15=ffff88806cf09a50 RIP=ffffffff81131cda RFL=00000202 [-------] 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 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=00007f1a3cc12620 CR3=000000000c7fe000 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=d98eebf9302592871540b8b12db667d1 XMM02=000000000011b028ec2efd57dc4c00df XMM03=00000000001219c8840373f0e675bf76 XMM04=29397a6376d6723b00000000000ae988 XMM05=dfcdbad4f1609c370000000000132c80 XMM06=489cdd11313d51380000000000131e58 XMM07=e042d86d42eb936e0000000000121c48 XMM08=840373f0e675bf76000000000011b088 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000