syzkaller login: [ 31.422021] BUG: Bad rss-counter state mm:00000000eb9391c7 type:MM_FILEPAGES val:33 [ 31.423186] BUG: Bad rss-counter state mm:00000000eb9391c7 type:MM_ANONPAGES val:22 [ 31.587924] ================================================================== [ 31.588841] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.589813] Read of size 8 at addr ffff88800c46c058 by task sshd/220 [ 31.590597] [ 31.590823] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.591802] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.592792] Call Trace: [ 31.593157] [ 31.593448] dump_stack_lvl+0x91/0xf0 [ 31.593949] print_report+0xcc/0x620 [ 31.594439] ? __virt_addr_valid+0x102/0x340 [ 31.595021] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.595672] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.596293] kasan_report+0xbe/0xf0 [ 31.596787] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.597422] vma_interval_tree_remove+0xc75/0xec0 [ 31.598021] vma_prepare+0xc54/0x11a0 [ 31.598513] __split_vma+0x5af/0x950 [ 31.599007] ? __pfx___split_vma+0x10/0x10 [ 31.599558] ? find_held_lock+0x2c/0x110 [ 31.600078] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.600640] ? lock_is_held_type+0x9f/0x120 [ 31.601182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.601788] ? mtree_range_walk+0x632/0x900 [ 31.602346] ? mas_walk+0x5c7/0x7c0 [ 31.602854] do_vmi_munmap+0x1f1/0x2b0 [ 31.603367] mmap_region+0x1f9/0x2660 [ 31.603881] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.604396] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.605125] ? __pfx_lock_acquire+0x10/0x10 [ 31.605660] ? __pfx_mmap_region+0x10/0x10 [ 31.606216] ? security_mmap_addr+0x7d/0xa0 [ 31.606775] ? get_unmapped_area+0x1f5/0x3f0 [ 31.607332] do_mmap+0x854/0xf00 [ 31.607785] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.608295] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.608872] ksys_mmap_pgoff+0x3af/0x500 [ 31.609388] do_syscall_64+0x3f/0x90 [ 31.609869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.610543] RIP: 0033:0x7ffbe28b8d82 [ 31.611015] 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 [ 31.613180] RSP: 002b:00007fffc75919c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.614102] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffbe28b8d82 [ 31.614968] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffbe1cf2000 [ 31.615817] RBP: 00007ffbe1cf2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.616680] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c58b0e980 [ 31.617529] R13: 00007fffc75919e0 R14: 00007fffc7591a10 R15: 00007fffc7591d70 [ 31.618397] [ 31.618710] [ 31.618928] Allocated by task 213: [ 31.619357] kasan_save_stack+0x22/0x50 [ 31.619867] kasan_set_track+0x25/0x30 [ 31.620368] __kasan_slab_alloc+0x59/0x70 [ 31.620907] kmem_cache_alloc+0x16b/0x370 [ 31.621423] vm_area_dup+0x20/0x160 [ 31.621893] __split_vma+0x170/0x950 [ 31.622374] split_vma+0xc6/0x110 [ 31.622841] mprotect_fixup+0x8d2/0xb30 [ 31.623343] do_mprotect_pkey+0x87e/0xd40 [ 31.623872] __x64_sys_mprotect+0x78/0xc0 [ 31.624400] do_syscall_64+0x3f/0x90 [ 31.624879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.625537] [ 31.625757] Freed by task 203: [ 31.626150] kasan_save_stack+0x22/0x50 [ 31.626667] kasan_set_track+0x25/0x30 [ 31.627175] kasan_save_free_info+0x2b/0x50 [ 31.627714] __kasan_slab_free+0x10a/0x190 [ 31.628261] kmem_cache_free+0x10d/0x4d0 [ 31.628784] rcu_core+0x8c8/0x2860 [ 31.629232] __do_softirq+0x1b7/0x7d4 [ 31.629705] [ 31.629924] Last potentially related work creation: [ 31.630540] kasan_save_stack+0x22/0x50 [ 31.631062] __kasan_record_aux_stack+0x8e/0xa0 [ 31.631646] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.632310] remove_vma+0x139/0x170 [ 31.632785] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.633360] do_vmi_munmap+0x1f1/0x2b0 [ 31.633866] __vm_munmap+0x138/0x3a0 [ 31.634338] __x64_sys_munmap+0x59/0x80 [ 31.634853] do_syscall_64+0x3f/0x90 [ 31.635342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.636010] [ 31.636224] The buggy address belongs to the object at ffff88800c46c000 [ 31.636224] which belongs to the cache vm_area_struct of size 168 [ 31.637708] The buggy address is located 88 bytes inside of [ 31.637708] freed 168-byte region [ffff88800c46c000, ffff88800c46c0a8) [ 31.639130] [ 31.639352] The buggy address belongs to the physical page: [ 31.640008] page:00000000f86269e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc46c [ 31.641109] memcg:ffff8880146f5001 [ 31.641554] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.642206] page_type: 0xffffffff() [ 31.642699] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.643647] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146f5001 [ 31.644583] page dumped because: kasan: bad access detected [ 31.645254] [ 31.645476] Memory state around the buggy address: [ 31.646060] ffff88800c46bf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.646927] ffff88800c46bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.647793] >ffff88800c46c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.648649] ^ [ 31.649378] ffff88800c46c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.650244] ffff88800c46c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.651123] ================================================================== [ 31.652132] Disabling lock debugging due to kernel taint [ 33.712162] BUG: Bad rss-counter state mm:00000000abb50397 type:MM_FILEPAGES val:33 [ 33.713336] BUG: Bad rss-counter state mm:00000000abb50397 type:MM_ANONPAGES val:22 [ 34.219702] BUG: Bad rss-counter state mm:0000000048201eb8 type:MM_FILEPAGES val:33 [ 34.220873] BUG: Bad rss-counter state mm:0000000048201eb8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61723' (ECDSA) to the list of known hosts. 2023/06/20 14:25:00 fuzzer started 2023/06/20 14:25:01 dialing manager at localhost:36067 2023/06/20 14:25:01 checking machine... 2023/06/20 14:25:01 checking revisions... [ 34.870048] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:25:01 testing simple program... [ 34.922717] cgroup: Unknown subsys name 'net' [ 34.984470] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:25:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016831b40 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff888016831f34 RBP=00007f3b191c2d77 RSP=ffff88806ce09a10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f3b191c2d77 R13=0000000000000000 R14=ffff888016831b40 R15=ffff888017de3580 RIP=ffffffff8135bd6b 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 00007f3b18cdb900 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=00007f3b19290650 CR3=000000001bd52000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888016b43680 RSI=ffffffff844cfc22 RDI=0000000000000007 RBP=00000000000000e5 RSP=ffff8880146b7808 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000001 R12=1ffff11003249cd0 R13=ffff8880088efa00 R14=0000000000000002 R15=ffff88801924e682 RIP=ffffffff844cfc2e 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 00007f8441052900 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=00007f8440478590 CR3=000000000c720000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=3be3e298f5a644da00000000000ae988 XMM05=fbe7d6a0597870d20000000000132ae0 XMM06=4fda316b135da52b00000000001318d0 XMM07=fb795ef6d65770560000000000121b68 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000