syzkaller login: [ 30.928342] BUG: Bad rss-counter state mm:00000000ec59fc35 type:MM_FILEPAGES val:33 [ 30.929381] BUG: Bad rss-counter state mm:00000000ec59fc35 type:MM_ANONPAGES val:22 [ 31.096083] ================================================================== [ 31.097042] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.098054] Read of size 8 at addr ffff88800d6aac20 by task sshd/220 [ 31.098865] [ 31.099188] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.100124] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.101135] Call Trace: [ 31.101489] <TASK> [ 31.101814] dump_stack_lvl+0x91/0xf0 [ 31.102331] print_report+0xcc/0x620 [ 31.102840] ? __virt_addr_valid+0x102/0x340 [ 31.103417] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.104090] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.104738] kasan_report+0xbe/0xf0 [ 31.105248] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.105921] vma_interval_tree_remove+0xc75/0xec0 [ 31.106559] vma_prepare+0xc54/0x11a0 [ 31.107064] __split_vma+0x5af/0x950 [ 31.107563] ? __pfx___split_vma+0x10/0x10 [ 31.108130] ? find_held_lock+0x2c/0x110 [ 31.108687] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.109287] ? lock_is_held_type+0x9f/0x120 [ 31.109874] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.110522] ? mtree_range_walk+0x632/0x900 [ 31.111101] ? mas_walk+0x5c7/0x7c0 [ 31.111606] do_vmi_munmap+0x1f1/0x2b0 [ 31.112131] mmap_region+0x1f9/0x2660 [ 31.112645] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.113190] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.113960] ? __pfx_lock_acquire+0x10/0x10 [ 31.114524] ? __pfx_mmap_region+0x10/0x10 [ 31.115081] ? security_mmap_addr+0x7d/0xa0 [ 31.115647] ? get_unmapped_area+0x1f5/0x3f0 [ 31.116236] do_mmap+0x854/0xf00 [ 31.116715] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.117245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.117863] ksys_mmap_pgoff+0x3af/0x500 [ 31.118415] do_syscall_64+0x3f/0x90 [ 31.118934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.119627] RIP: 0033:0x7f61ce9a0d82 [ 31.120113] 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 [ 31.122428] RSP: 002b:00007ffd45acda58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.123389] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f61ce9a0d82 [ 31.124292] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61cddda000 [ 31.125198] RBP: 00007f61cddda000 R08: 0000000000000009 R09: 0000000000001000 [ 31.126112] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec2aac4b20 [ 31.127019] R13: 00007ffd45acda70 R14: 00007ffd45acdaa0 R15: 00007ffd45acde00 [ 31.127935] </TASK> [ 31.128245] [ 31.128482] Allocated by task 213: [ 31.128936] kasan_save_stack+0x22/0x50 [ 31.129483] kasan_set_track+0x25/0x30 [ 31.130025] __kasan_slab_alloc+0x59/0x70 [ 31.130583] kmem_cache_alloc+0x16b/0x370 [ 31.131132] vm_area_dup+0x20/0x160 [ 31.131615] __split_vma+0x170/0x950 [ 31.132113] split_vma+0xc6/0x110 [ 31.132581] mprotect_fixup+0x8d2/0xb30 [ 31.133115] do_mprotect_pkey+0x87e/0xd40 [ 31.133672] __x64_sys_mprotect+0x78/0xc0 [ 31.134237] do_syscall_64+0x3f/0x90 [ 31.134755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.135448] [ 31.135676] Freed by task 19: [ 31.136085] kasan_save_stack+0x22/0x50 [ 31.136622] kasan_set_track+0x25/0x30 [ 31.137158] kasan_save_free_info+0x2b/0x50 [ 31.137746] __kasan_slab_free+0x10a/0x190 [ 31.138316] kmem_cache_free+0x10d/0x4d0 [ 31.138855] rcu_core+0x8c8/0x2860 [ 31.139328] __do_softirq+0x1b7/0x7d4 [ 31.139837] [ 31.140065] Last potentially related work creation: [ 31.140681] kasan_save_stack+0x22/0x50 [ 31.141276] __kasan_record_aux_stack+0x8e/0xa0 [ 31.141906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.142593] remove_vma+0x139/0x170 [ 31.143071] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.143666] do_vmi_munmap+0x1f1/0x2b0 [ 31.144192] __vm_munmap+0x138/0x3a0 [ 31.144696] __x64_sys_munmap+0x59/0x80 [ 31.145224] do_syscall_64+0x3f/0x90 [ 31.145744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.146425] [ 31.146654] The buggy address belongs to the object at ffff88800d6aabc8 [ 31.146654] which belongs to the cache vm_area_struct of size 168 [ 31.148224] The buggy address is located 88 bytes inside of [ 31.148224] freed 168-byte region [ffff88800d6aabc8, ffff88800d6aac70) [ 31.149750] [ 31.149984] The buggy address belongs to the physical page: [ 31.150688] page:000000007a4931b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6aa [ 31.151846] memcg:ffff88800de03601 [ 31.152308] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.153000] page_type: 0xffffffff() [ 31.153488] raw: 0100000000000200 ffff8880087a0c80 ffffea0000382880 dead000000000006 [ 31.154469] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de03601 [ 31.155433] page dumped because: kasan: bad access detected [ 31.156145] [ 31.156378] Memory state around the buggy address: [ 31.157000] ffff88800d6aab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.157920] ffff88800d6aab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.158839] >ffff88800d6aac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.159734] ^ [ 31.160292] ffff88800d6aac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.161210] ffff88800d6aad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.162116] ================================================================== [ 31.163169] Disabling lock debugging due to kernel taint [ 33.328434] BUG: Bad rss-counter state mm:00000000c6dfe113 type:MM_FILEPAGES val:33 [ 33.329452] BUG: Bad rss-counter state mm:00000000c6dfe113 type:MM_ANONPAGES val:22 [ 33.712383] BUG: Bad rss-counter state mm:0000000023818009 type:MM_FILEPAGES val:33 [ 33.713612] BUG: Bad rss-counter state mm:0000000023818009 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53268' (ECDSA) to the list of known hosts. 2023/06/20 13:44:33 fuzzer started 2023/06/20 13:44:34 dialing manager at localhost:36067 2023/06/20 13:44:34 checking machine... 2023/06/20 13:44:34 checking revisions... [ 34.432781] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:44:34 testing simple program... [ 34.473996] cgroup: Unknown subsys name 'net' [ 34.513092] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:44:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b38 RCX=ffffffff860d8201 RDX=0000000000000000 RSI=ffffffff8180c6a2 RDI=ffff88806ce09b44 RBP=000000000000000d RSP=ffff88806ce09a50 R8 =ffffffff860d825a R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff88800d280000 R15=ffff88800f2a3f18 RIP=ffffffff813ad4ee 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 00007f2ba391b900 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=0000561463f06318 CR3=000000000d6ae000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=49675ead8fe63b8a00000000000ae988 XMM05=381ca76c512a58110000000000132638 XMM06=4fda316b135da52b00000000001316d8 XMM07=fb795ef6d65770560000000000121920 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002767213 RBX=ffff888013b39068 RCX=1ffff110018a8bb6 RDX=dffffc0000000000 RSI=ffff888013b32368 RDI=ffff888013b39098 RBP=ffff888013b3ac58 RSP=ffff88800f6776b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888013b32280 R13=0000000000000000 R14=ffff88801aa0cc28 R15=ffff88801aa0cbe0 RIP=ffffffff8184767e RFL=00000046 [---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 00007fb2bf644900 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=00007fb2bfbfb618 CR3=0000000018d24000 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