syzkaller login: [ 30.440464] BUG: Bad rss-counter state mm:000000005119fda4 type:MM_FILEPAGES val:33 [ 30.441207] BUG: Bad rss-counter state mm:000000005119fda4 type:MM_ANONPAGES val:22 [ 30.567402] ================================================================== [ 30.568113] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.568820] Read of size 8 at addr ffff88800f703b38 by task sshd/219 [ 30.569334] [ 30.569473] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.570047] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.570690] Call Trace: [ 30.570907] [ 30.571093] dump_stack_lvl+0x91/0xf0 [ 30.571418] print_report+0xcc/0x620 [ 30.571726] ? __virt_addr_valid+0x102/0x340 [ 30.572294] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.572690] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.573092] kasan_report+0xbe/0xf0 [ 30.573399] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.573802] vma_interval_tree_remove+0xc75/0xec0 [ 30.574201] vma_prepare+0xc54/0x11a0 [ 30.574516] __split_vma+0x5af/0x950 [ 30.574820] ? __pfx___split_vma+0x10/0x10 [ 30.575171] ? find_held_lock+0x2c/0x110 [ 30.575517] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.575910] ? lock_is_held_type+0x9f/0x120 [ 30.576344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.576750] ? mtree_range_walk+0x632/0x900 [ 30.577132] ? mas_walk+0x5c7/0x7c0 [ 30.577463] do_vmi_munmap+0x1f1/0x2b0 [ 30.577789] mmap_region+0x1f9/0x2660 [ 30.578113] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.578456] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.578930] ? __pfx_lock_acquire+0x10/0x10 [ 30.579302] ? __pfx_mmap_region+0x10/0x10 [ 30.579666] ? security_mmap_addr+0x7d/0xa0 [ 30.580025] ? get_unmapped_area+0x1f5/0x3f0 [ 30.580430] do_mmap+0x854/0xf00 [ 30.580713] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.581048] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.581428] ksys_mmap_pgoff+0x3af/0x500 [ 30.581774] do_syscall_64+0x3f/0x90 [ 30.582108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.582530] RIP: 0033:0x7f1eae60ad82 [ 30.582831] 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 [ 30.584392] RSP: 002b:00007ffcc6bb40a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.584994] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1eae60ad82 [ 30.585592] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1eada44000 [ 30.586165] RBP: 00007f1eada44000 R08: 0000000000000009 R09: 0000000000001000 [ 30.586735] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618d32f5ec0 [ 30.587287] R13: 00007ffcc6bb40c0 R14: 00007ffcc6bb40f0 R15: 00007ffcc6bb4450 [ 30.587837] [ 30.588027] [ 30.588236] Allocated by task 212: [ 30.588528] kasan_save_stack+0x22/0x50 [ 30.588874] kasan_set_track+0x25/0x30 [ 30.589204] __kasan_slab_alloc+0x59/0x70 [ 30.589537] kmem_cache_alloc+0x16b/0x370 [ 30.589861] vm_area_dup+0x20/0x160 [ 30.590148] __split_vma+0x170/0x950 [ 30.590451] split_vma+0xc6/0x110 [ 30.590742] mprotect_fixup+0x8d2/0xb30 [ 30.591083] do_mprotect_pkey+0x87e/0xd40 [ 30.591435] __x64_sys_mprotect+0x78/0xc0 [ 30.591785] do_syscall_64+0x3f/0x90 [ 30.592102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.592577] [ 30.592718] Freed by task 202: [ 30.592974] kasan_save_stack+0x22/0x50 [ 30.593308] kasan_set_track+0x25/0x30 [ 30.593640] kasan_save_free_info+0x2b/0x50 [ 30.594019] __kasan_slab_free+0x10a/0x190 [ 30.594385] kmem_cache_free+0x10d/0x4d0 [ 30.594723] rcu_core+0x8c8/0x2860 [ 30.595018] __do_softirq+0x1b7/0x7d4 [ 30.595330] [ 30.595475] Last potentially related work creation: [ 30.595850] kasan_save_stack+0x22/0x50 [ 30.596222] __kasan_record_aux_stack+0x8e/0xa0 [ 30.596595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.597023] remove_vma+0x139/0x170 [ 30.597336] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.597714] do_vmi_munmap+0x1f1/0x2b0 [ 30.598036] __vm_munmap+0x138/0x3a0 [ 30.598360] __x64_sys_munmap+0x59/0x80 [ 30.598688] do_syscall_64+0x3f/0x90 [ 30.599000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.599424] [ 30.599562] The buggy address belongs to the object at ffff88800f703ae0 [ 30.599562] which belongs to the cache vm_area_struct of size 168 [ 30.600608] The buggy address is located 88 bytes inside of [ 30.600608] freed 168-byte region [ffff88800f703ae0, ffff88800f703b88) [ 30.601588] [ 30.601732] The buggy address belongs to the physical page: [ 30.602170] page:000000002879c478 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf703 [ 30.602893] memcg:ffff88800c516d01 [ 30.603197] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.603617] page_type: 0xffffffff() [ 30.603917] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.604603] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c516d01 [ 30.605211] page dumped because: kasan: bad access detected [ 30.605646] [ 30.605786] Memory state around the buggy address: [ 30.606176] ffff88800f703a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.606730] ffff88800f703a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.607288] >ffff88800f703b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.607841] ^ [ 30.608320] ffff88800f703b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.608881] ffff88800f703c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.609450] ================================================================== [ 30.610241] Disabling lock debugging due to kernel taint [ 32.022735] BUG: Bad rss-counter state mm:0000000078bfe3cb type:MM_FILEPAGES val:33 [ 32.023462] BUG: Bad rss-counter state mm:0000000078bfe3cb type:MM_ANONPAGES val:22 [ 32.352311] BUG: Bad rss-counter state mm:00000000a2b7b02d type:MM_FILEPAGES val:33 [ 32.353023] BUG: Bad rss-counter state mm:00000000a2b7b02d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10377' (ECDSA) to the list of known hosts. 2023/06/21 09:00:55 fuzzer started 2023/06/21 09:00:55 dialing manager at localhost:36067 2023/06/21 09:00:55 checking machine... 2023/06/21 09:00:55 checking revisions... [ 32.922698] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:00:55 testing simple program... [ 32.956563] cgroup: Unknown subsys name 'net' [ 33.011296] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:00:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015991b40 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab1b24 RDI=ffff888015991f34 RBP=ffff888015991b40 RSP=ffff88800f30f4d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000094100000941 R12=ffff888015991b40 R13=0000000000000068 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff8137459d 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 00007faf14b48900 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=00007faf150ff618 CR3=0000000018e76000 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=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 info registers vcpu 1 RAX=ffffffff8180f5bb RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff1100d9e135e RSI=ffffffff8180f5bb RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff86138eb4 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800d03bc60 RIP=ffffffff813ad474 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 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=00007ffff705a6c8 CR3=00000000145c4000 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=2035353a30303a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a30303a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000