syzkaller login: [ 30.852714] BUG: Bad rss-counter state mm:00000000afefb6c2 type:MM_FILEPAGES val:33 [ 30.853932] BUG: Bad rss-counter state mm:00000000afefb6c2 type:MM_ANONPAGES val:22 [ 31.014309] ================================================================== [ 31.015158] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.016033] Read of size 8 at addr ffff88800d8d0058 by task sshd/220 [ 31.016744] [ 31.016945] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.017850] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.018762] Call Trace: [ 31.019052] [ 31.019343] dump_stack_lvl+0x91/0xf0 [ 31.019792] print_report+0xcc/0x620 [ 31.020241] ? __virt_addr_valid+0x102/0x340 [ 31.020765] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.021342] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.021910] kasan_report+0xbe/0xf0 [ 31.022360] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.022952] vma_interval_tree_remove+0xc75/0xec0 [ 31.023534] vma_prepare+0xc54/0x11a0 [ 31.023966] __split_vma+0x5af/0x950 [ 31.024415] ? __pfx___split_vma+0x10/0x10 [ 31.024916] ? find_held_lock+0x2c/0x110 [ 31.025397] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.025913] ? lock_is_held_type+0x9f/0x120 [ 31.026429] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.026998] ? mtree_range_walk+0x632/0x900 [ 31.027543] ? mas_walk+0x5c7/0x7c0 [ 31.027988] do_vmi_munmap+0x1f1/0x2b0 [ 31.028472] mmap_region+0x1f9/0x2660 [ 31.028940] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.029415] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.030104] ? __pfx_lock_acquire+0x10/0x10 [ 31.030616] ? __pfx_mmap_region+0x10/0x10 [ 31.031118] ? security_mmap_addr+0x7d/0xa0 [ 31.031653] ? get_unmapped_area+0x1f5/0x3f0 [ 31.032171] do_mmap+0x854/0xf00 [ 31.032583] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.033035] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.033556] ksys_mmap_pgoff+0x3af/0x500 [ 31.034033] do_syscall_64+0x3f/0x90 [ 31.034481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.035084] RIP: 0033:0x7fdfcac65d82 [ 31.035534] 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 [ 31.037565] RSP: 002b:00007ffffb475198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.038422] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdfcac65d82 [ 31.039217] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdfca09f000 [ 31.040032] RBP: 00007fdfca09f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.040810] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562639641980 [ 31.041595] R13: 00007ffffb4751b0 R14: 00007ffffb4751e0 R15: 00007ffffb475540 [ 31.042540] [ 31.042810] [ 31.043014] Allocated by task 213: [ 31.043434] kasan_save_stack+0x22/0x50 [ 31.043912] kasan_set_track+0x25/0x30 [ 31.044367] __kasan_slab_alloc+0x59/0x70 [ 31.044854] kmem_cache_alloc+0x16b/0x370 [ 31.045332] vm_area_dup+0x20/0x160 [ 31.045760] __split_vma+0x170/0x950 [ 31.046196] split_vma+0xc6/0x110 [ 31.046607] mprotect_fixup+0x8d2/0xb30 [ 31.047079] do_mprotect_pkey+0x87e/0xd40 [ 31.047577] __x64_sys_mprotect+0x78/0xc0 [ 31.048061] do_syscall_64+0x3f/0x90 [ 31.048504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.049096] [ 31.049295] Freed by task 213: [ 31.049670] kasan_save_stack+0x22/0x50 [ 31.050138] kasan_set_track+0x25/0x30 [ 31.050597] kasan_save_free_info+0x2b/0x50 [ 31.051099] __kasan_slab_free+0x10a/0x190 [ 31.051607] kmem_cache_free+0x10d/0x4d0 [ 31.052080] rcu_core+0x8c8/0x2860 [ 31.052500] __do_softirq+0x1b7/0x7d4 [ 31.052940] [ 31.053144] Last potentially related work creation: [ 31.053696] kasan_save_stack+0x22/0x50 [ 31.054166] __kasan_record_aux_stack+0x8e/0xa0 [ 31.054704] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.055310] remove_vma+0x139/0x170 [ 31.055736] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.056256] do_vmi_munmap+0x1f1/0x2b0 [ 31.056714] __vm_munmap+0x138/0x3a0 [ 31.057154] __x64_sys_munmap+0x59/0x80 [ 31.057612] do_syscall_64+0x3f/0x90 [ 31.058067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.058679] [ 31.058881] Second to last potentially related work creation: [ 31.059529] kasan_save_stack+0x22/0x50 [ 31.059985] __kasan_record_aux_stack+0x8e/0xa0 [ 31.060519] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.061137] remove_vma+0x139/0x170 [ 31.061551] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.062075] do_vmi_munmap+0x1f1/0x2b0 [ 31.062525] mmap_region+0x1f9/0x2660 [ 31.062970] do_mmap+0x854/0xf00 [ 31.063374] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.063839] ksys_mmap_pgoff+0x3af/0x500 [ 31.064303] do_syscall_64+0x3f/0x90 [ 31.064753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.065352] [ 31.065554] The buggy address belongs to the object at ffff88800d8d0000 [ 31.065554] which belongs to the cache vm_area_struct of size 168 [ 31.066932] The buggy address is located 88 bytes inside of [ 31.066932] freed 168-byte region [ffff88800d8d0000, ffff88800d8d00a8) [ 31.068269] [ 31.068471] The buggy address belongs to the physical page: [ 31.069081] page:0000000017b105f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8d0 [ 31.070112] memcg:ffff88800becca01 [ 31.070507] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.071163] page_type: 0xffffffff() [ 31.071595] raw: 0100000000000200 ffff8880087a0c80 ffffea000038b0c0 dead000000000005 [ 31.072448] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800becca01 [ 31.073310] page dumped because: kasan: bad access detected [ 31.073946] [ 31.074144] Memory state around the buggy address: [ 31.074687] ffff88800d8cff00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.075487] ffff88800d8cff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.076273] >ffff88800d8d0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.077049] ^ [ 31.077709] ffff88800d8d0080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.078489] ffff88800d8d0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.079261] ================================================================== [ 31.080282] Disabling lock debugging due to kernel taint [ 33.115401] BUG: Bad rss-counter state mm:000000001c252e7d type:MM_FILEPAGES val:33 [ 33.116824] BUG: Bad rss-counter state mm:000000001c252e7d type:MM_ANONPAGES val:22 [ 33.623880] BUG: Bad rss-counter state mm:0000000012cc939a type:MM_FILEPAGES val:33 [ 33.625186] BUG: Bad rss-counter state mm:0000000012cc939a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34812' (ECDSA) to the list of known hosts. 2023/06/21 02:41:30 fuzzer started 2023/06/21 02:41:30 dialing manager at localhost:36067 2023/06/21 02:41:30 checking machine... 2023/06/21 02:41:30 checking revisions... [ 34.338381] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:41:30 testing simple program... [ 34.396559] cgroup: Unknown subsys name 'net' [ 34.460434] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:41:30 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff861386fa RDX=0000000000000000 RSI=1ffff110028f7efc RDI=0000000000000001 RBP=ffff8880147bf7f8 RSP=ffff8880147bf730 R8 =ffffffff861386fe R9 =ffff8880147bf7e0 R10=0000000000038001 R11=0000000000020c51 R12=ffff8880147bf800 R13=ffff8880147bf7e8 R14=ffff8880147bf7e1 R15=ffff8880147bf7a0 RIP=ffffffff81130af5 RFL=00000216 [----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 00007f5d70634900 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=00007f5d6fb53000 CR3=000000000c86a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7d3c3a55011120f200000000000ae988 XMM05=61d494bb2a603a8b0000000000133f00 XMM06=19e9129bd510f2350000000000132cd8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009c33400 RCX=1ffffffff0ba7c92 RDX=1ffff110013866b5 RSI=0000000000000008 RDI=ffff888009c335b0 RBP=ffff88800ea70ec0 RSP=ffff888009c274a8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880099d5500 R13=ffff888009c3346c R14=00000000ffffffff R15=ffff888009c335a8 RIP=ffffffff83c56cfd 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 00007ff641604900 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=00007ff641bbb618 CR3=000000001c9e6000 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=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