syzkaller login: [ 60.745820] BUG: Bad rss-counter state mm:00000000123b978f type:MM_FILEPAGES val:33 [ 60.747377] BUG: Bad rss-counter state mm:00000000123b978f type:MM_ANONPAGES val:22 [ 60.912562] ================================================================== [ 60.913644] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.914895] Read of size 8 at addr ffff88801474d058 by task sshd/220 [ 60.915751] [ 60.915972] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.916850] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.917830] Call Trace: [ 60.918152] [ 60.918435] dump_stack_lvl+0x91/0xf0 [ 60.918950] print_report+0xcc/0x620 [ 60.919440] ? __virt_addr_valid+0x102/0x340 [ 60.919999] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.920623] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.921246] kasan_report+0xbe/0xf0 [ 60.921732] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.922359] vma_interval_tree_remove+0xc75/0xec0 [ 60.922972] vma_prepare+0xc54/0x11a0 [ 60.923463] __split_vma+0x5af/0x950 [ 60.923958] ? __pfx___split_vma+0x10/0x10 [ 60.924510] ? find_held_lock+0x2c/0x110 [ 60.925027] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.925588] ? lock_is_held_type+0x9f/0x120 [ 60.926127] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.926764] ? mtree_range_walk+0x632/0x900 [ 60.927321] ? mas_walk+0x5c7/0x7c0 [ 60.927799] do_vmi_munmap+0x1f1/0x2b0 [ 60.928294] mmap_region+0x1f9/0x2660 [ 60.928777] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.929300] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.930015] ? __pfx_lock_acquire+0x10/0x10 [ 60.930557] ? __pfx_mmap_region+0x10/0x10 [ 60.931097] ? security_mmap_addr+0x7d/0xa0 [ 60.931638] ? get_unmapped_area+0x1f5/0x3f0 [ 60.932184] do_mmap+0x854/0xf00 [ 60.932626] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.933126] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.933693] ksys_mmap_pgoff+0x3af/0x500 [ 60.934195] do_syscall_64+0x3f/0x90 [ 60.934693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.935345] RIP: 0033:0x7f6967272d82 [ 60.935799] 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 [ 60.937965] RSP: 002b:00007ffd44bf3f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.938910] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6967272d82 [ 60.939761] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69666ac000 [ 60.940605] RBP: 00007f69666ac000 R08: 0000000000000009 R09: 0000000000001000 [ 60.941449] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2c4475980 [ 60.942303] R13: 00007ffd44bf3f30 R14: 00007ffd44bf3f60 R15: 00007ffd44bf42c0 [ 60.943191] [ 60.943483] [ 60.943697] Allocated by task 213: [ 60.944134] kasan_save_stack+0x22/0x50 [ 60.944647] kasan_set_track+0x25/0x30 [ 60.945140] __kasan_slab_alloc+0x59/0x70 [ 60.945664] kmem_cache_alloc+0x16b/0x370 [ 60.946184] vm_area_dup+0x20/0x160 [ 60.946650] __split_vma+0x170/0x950 [ 60.947119] split_vma+0xc6/0x110 [ 60.947562] mprotect_fixup+0x8d2/0xb30 [ 60.948066] do_mprotect_pkey+0x87e/0xd40 [ 60.948587] __x64_sys_mprotect+0x78/0xc0 [ 60.949111] do_syscall_64+0x3f/0x90 [ 60.949583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.950235] [ 60.950457] Freed by task 19: [ 60.950855] kasan_save_stack+0x22/0x50 [ 60.951359] kasan_set_track+0x25/0x30 [ 60.951853] kasan_save_free_info+0x2b/0x50 [ 60.952382] __kasan_slab_free+0x10a/0x190 [ 60.952911] kmem_cache_free+0x10d/0x4d0 [ 60.953421] rcu_core+0x8c8/0x2860 [ 60.953864] __do_softirq+0x1b7/0x7d4 [ 60.954345] [ 60.954574] Last potentially related work creation: [ 60.955164] kasan_save_stack+0x22/0x50 [ 60.955670] __kasan_record_aux_stack+0x8e/0xa0 [ 60.956304] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.956948] remove_vma+0x139/0x170 [ 60.957408] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.957966] do_vmi_munmap+0x1f1/0x2b0 [ 60.958450] __vm_munmap+0x138/0x3a0 [ 60.958932] __x64_sys_munmap+0x59/0x80 [ 60.959433] do_syscall_64+0x3f/0x90 [ 60.959907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.960545] [ 60.960759] The buggy address belongs to the object at ffff88801474d000 [ 60.960759] which belongs to the cache vm_area_struct of size 168 [ 60.962226] The buggy address is located 88 bytes inside of [ 60.962226] freed 168-byte region [ffff88801474d000, ffff88801474d0a8) [ 60.963636] [ 60.963855] The buggy address belongs to the physical page: [ 60.964518] page:0000000080e695c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1474d [ 60.965612] memcg:ffff888019c32501 [ 60.966042] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.966700] page_type: 0xffffffff() [ 60.967150] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.968070] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c32501 [ 60.968975] page dumped because: kasan: bad access detected [ 60.969637] [ 60.969851] Memory state around the buggy address: [ 60.970432] ffff88801474cf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 60.971314] ffff88801474cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.972176] >ffff88801474d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.973030] ^ [ 60.973754] ffff88801474d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 60.974632] ffff88801474d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.975486] ================================================================== [ 60.976416] Disabling lock debugging due to kernel taint [ 62.860833] BUG: Bad rss-counter state mm:000000003cb4cfbd type:MM_FILEPAGES val:33 [ 62.861770] BUG: Bad rss-counter state mm:000000003cb4cfbd type:MM_ANONPAGES val:22 [ 63.337727] BUG: Bad rss-counter state mm:00000000bdb9be06 type:MM_FILEPAGES val:33 [ 63.338825] BUG: Bad rss-counter state mm:00000000bdb9be06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60559' (ECDSA) to the list of known hosts. 2023/06/21 05:00:34 fuzzer started 2023/06/21 05:00:34 dialing manager at localhost:36067 2023/06/21 05:00:34 checking machine... 2023/06/21 05:00:34 checking revisions... [ 64.038003] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:00:35 testing simple program... [ 64.094147] cgroup: Unknown subsys name 'net' [ 64.156023] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:00:34 Registers: info registers vcpu 0 RAX=ffffea00004f9880 RBX=ffffffff852ca4b8 RCX=0000000000000000 RDX=ffff888008441500 RSI=ffffffff81ef57e8 RDI=ffff888013e62340 RBP=ffff888013e62340 RSP=ffff88800d8a77e8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880145de800 R13=ffff88800a23e000 R14=ffffffff87f9778c R15=ffff8880145dea74 RIP=ffffffff816cbac5 RFL=00000282 [--S----] 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 00007f2d3aaa0900 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=00007f2d39efbef0 CR3=000000000d9c0000 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=02aa31d2a2ffe1a80d45e8528e00ca82 XMM02=000000000011a3f8d59e07bde36eea69 XMM03=000000000011a520ec2efd57dc4c00df XMM04=f875020a72ad826800000000000ae988 XMM05=c92dde4a1351242a0000000000132ad8 XMM06=19e9129bd510f2350000000000131c40 XMM07=fb795ef6d65770560000000000121dc8 XMM08=2c67c8bc2e329bc3000000000011a520 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000002a565411ec RBX=0000000000000000 RCX=00000000000006e0 RDX=000000000000002a RSI=ffff88806cf28140 RDI=00000000000531bf RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ede6c R11=0000000000000001 R12=00000000000531bf R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000012 [----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 00007f39b22f8900 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=00007f39b28af618 CR3=000000000d7be000 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