syzkaller login: [ 30.931042] BUG: Bad rss-counter state mm:000000004348a4d8 type:MM_FILEPAGES val:33 [ 30.931802] BUG: Bad rss-counter state mm:000000004348a4d8 type:MM_ANONPAGES val:22 [ 31.064004] ================================================================== [ 31.064902] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.065873] Read of size 8 at addr ffff888013b35058 by task sshd/221 [ 31.066637] [ 31.066851] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.067852] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.068826] Call Trace: [ 31.069169] [ 31.069457] dump_stack_lvl+0x91/0xf0 [ 31.069953] print_report+0xcc/0x620 [ 31.070436] ? __virt_addr_valid+0x102/0x340 [ 31.070988] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.071603] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.072221] kasan_report+0xbe/0xf0 [ 31.072702] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.073330] vma_interval_tree_remove+0xc75/0xec0 [ 31.073932] vma_prepare+0xc54/0x11a0 [ 31.074405] __split_vma+0x5af/0x950 [ 31.074877] ? __pfx___split_vma+0x10/0x10 [ 31.075411] ? find_held_lock+0x2c/0x110 [ 31.075935] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.076497] ? lock_is_held_type+0x9f/0x120 [ 31.077037] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.077644] ? mtree_range_walk+0x632/0x900 [ 31.078188] ? mas_walk+0x5c7/0x7c0 [ 31.078665] do_vmi_munmap+0x1f1/0x2b0 [ 31.079155] mmap_region+0x1f9/0x2660 [ 31.079632] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.080139] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.080846] ? __pfx_lock_acquire+0x10/0x10 [ 31.081394] ? __pfx_mmap_region+0x10/0x10 [ 31.081928] ? security_mmap_addr+0x7d/0xa0 [ 31.082456] ? get_unmapped_area+0x1f5/0x3f0 [ 31.083006] do_mmap+0x854/0xf00 [ 31.083442] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.083936] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.084497] ksys_mmap_pgoff+0x3af/0x500 [ 31.085006] do_syscall_64+0x3f/0x90 [ 31.085486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.086135] RIP: 0033:0x7f51869a0d82 [ 31.086595] 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 [ 31.088705] RSP: 002b:00007ffd00878978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.089636] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f51869a0d82 [ 31.090494] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5185dda000 [ 31.091353] RBP: 00007f5185dda000 R08: 0000000000000009 R09: 0000000000001000 [ 31.092205] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f9066cf70 [ 31.093073] R13: 00007ffd00878990 R14: 00007ffd008789c0 R15: 00007ffd00878d20 [ 31.093937] [ 31.094236] [ 31.094455] Allocated by task 214: [ 31.094889] kasan_save_stack+0x22/0x50 [ 31.095393] kasan_set_track+0x25/0x30 [ 31.095893] __kasan_slab_alloc+0x59/0x70 [ 31.096416] kmem_cache_alloc+0x16b/0x370 [ 31.096930] vm_area_dup+0x20/0x160 [ 31.097403] __split_vma+0x170/0x950 [ 31.097866] split_vma+0xc6/0x110 [ 31.098311] mprotect_fixup+0x8d2/0xb30 [ 31.098808] do_mprotect_pkey+0x87e/0xd40 [ 31.099323] __x64_sys_mprotect+0x78/0xc0 [ 31.099837] do_syscall_64+0x3f/0x90 [ 31.100310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.100953] [ 31.101177] Freed by task 0: [ 31.101553] kasan_save_stack+0x22/0x50 [ 31.102056] kasan_set_track+0x25/0x30 [ 31.102545] kasan_save_free_info+0x2b/0x50 [ 31.103074] __kasan_slab_free+0x10a/0x190 [ 31.103604] kmem_cache_free+0x10d/0x4d0 [ 31.104127] rcu_core+0x8c8/0x2860 [ 31.104568] __do_softirq+0x1b7/0x7d4 [ 31.105064] [ 31.105277] Last potentially related work creation: [ 31.105861] kasan_save_stack+0x22/0x50 [ 31.106369] __kasan_record_aux_stack+0x8e/0xa0 [ 31.106944] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.107583] remove_vma+0x139/0x170 [ 31.108036] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.108590] do_vmi_munmap+0x1f1/0x2b0 [ 31.109080] __vm_munmap+0x138/0x3a0 [ 31.109545] __x64_sys_munmap+0x59/0x80 [ 31.110037] do_syscall_64+0x3f/0x90 [ 31.110514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.111152] [ 31.111371] The buggy address belongs to the object at ffff888013b35000 [ 31.111371] which belongs to the cache vm_area_struct of size 168 [ 31.112846] The buggy address is located 88 bytes inside of [ 31.112846] freed 168-byte region [ffff888013b35000, ffff888013b350a8) [ 31.114261] [ 31.114474] The buggy address belongs to the physical page: [ 31.115128] page:00000000f8a86c9d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13b35 [ 31.116221] memcg:ffff88800e417801 [ 31.116649] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.117301] page_type: 0xffffffff() [ 31.117756] raw: 0100000000000200 ffff8880087a0c80 ffffea0000568140 dead000000000008 [ 31.118676] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e417801 [ 31.119585] page dumped because: kasan: bad access detected [ 31.120243] [ 31.120457] Memory state around the buggy address: [ 31.121040] ffff888013b34f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.121899] ffff888013b34f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.122752] >ffff888013b35000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.123604] ^ [ 31.124332] ffff888013b35080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.125202] ffff888013b35100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.126052] ================================================================== [ 31.127305] Disabling lock debugging due to kernel taint [ 33.033563] BUG: Bad rss-counter state mm:000000003ff7bc17 type:MM_FILEPAGES val:33 [ 33.034564] BUG: Bad rss-counter state mm:000000003ff7bc17 type:MM_ANONPAGES val:22 [ 33.490730] BUG: Bad rss-counter state mm:00000000c83a727a type:MM_FILEPAGES val:33 [ 33.491692] BUG: Bad rss-counter state mm:00000000c83a727a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19349' (ECDSA) to the list of known hosts. 2023/06/20 19:14:15 fuzzer started 2023/06/20 19:14:16 dialing manager at localhost:36067 2023/06/20 19:14:16 checking machine... 2023/06/20 19:14:16 checking revisions... [ 34.210823] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:14:16 testing simple program... [ 34.271043] cgroup: Unknown subsys name 'net' [ 34.319121] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:14:15 Registers: info registers vcpu 0 RAX=ffffffff8613897b RBX=0000000000000001 RCX=ffffffff86138976 RDX=0000000000000000 RSI=1ffffffff0c2712f RDI=ffffffff85dfdcb8 RBP=ffff88801664fa30 RSP=ffff88801664f968 R8 =ffffffff86138976 R9 =ffff88801664fa18 R10=0000000000038001 R11=0000000000020cbd R12=ffff88801664fa38 R13=ffff88801664fa20 R14=ffff88801664fa19 R15=ffff88801664f9d8 RIP=ffffffff81130a5b 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa0b827e900 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=00007ffe4c5af000 CR3=000000001ce10000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86073d0d RBX=0000000000000001 RCX=ffffffff86073d08 RDX=0000000000000000 RSI=1ffffffff0c0e7a1 RDI=ffffffff85d7a9c4 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff86073d08 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000000000 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff81130a5b RFL=00000213 [----A-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 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=00007faef8e5bfa0 CR3=000000000f05e000 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=7f75a0a30c8d9d81f7477e432a579674 XMM02=000000000011b2f8eff9b2d0a8fce9cb XMM03=000000000011b3c82c67c8bc2e329bc3 XMM04=077b381507ab20b800000000000ae988 XMM05=e4cb8bb95a7664b60000000000131f00 XMM06=577e5edf4d7fb7b70000000000130d68 XMM07=e042d86d42eb936e0000000000122310 XMM08=e8a73242af4fa00d000000000011b3c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000