syzkaller login: [ 29.078843] BUG: Bad rss-counter state mm:000000002e4175f7 type:MM_FILEPAGES val:33 [ 29.079843] BUG: Bad rss-counter state mm:000000002e4175f7 type:MM_ANONPAGES val:22 [ 29.242905] ================================================================== [ 29.243813] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.244749] Read of size 8 at addr ffff88800f103c20 by task sshd/219 [ 29.245521] [ 29.245738] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.246747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.247742] Call Trace: [ 29.248062] [ 29.248344] dump_stack_lvl+0x91/0xf0 [ 29.248830] print_report+0xcc/0x620 [ 29.249314] ? __virt_addr_valid+0x102/0x340 [ 29.249864] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.250475] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.251085] kasan_report+0xbe/0xf0 [ 29.251565] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.252185] vma_interval_tree_remove+0xc75/0xec0 [ 29.252782] vma_prepare+0xc54/0x11a0 [ 29.253259] __split_vma+0x5af/0x950 [ 29.253730] ? __pfx___split_vma+0x10/0x10 [ 29.254254] ? find_held_lock+0x2c/0x110 [ 29.254768] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.255328] ? lock_is_held_type+0x9f/0x120 [ 29.255874] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.256476] ? mtree_range_walk+0x632/0x900 [ 29.257025] ? mas_walk+0x5c7/0x7c0 [ 29.257498] do_vmi_munmap+0x1f1/0x2b0 [ 29.257989] mmap_region+0x1f9/0x2660 [ 29.258469] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.258975] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.259816] ? __pfx_lock_acquire+0x10/0x10 [ 29.260352] ? __pfx_mmap_region+0x10/0x10 [ 29.260880] ? security_mmap_addr+0x7d/0xa0 [ 29.261408] ? get_unmapped_area+0x1f5/0x3f0 [ 29.261961] do_mmap+0x854/0xf00 [ 29.262398] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.262894] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.263470] ksys_mmap_pgoff+0x3af/0x500 [ 29.263985] do_syscall_64+0x3f/0x90 [ 29.264460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.265104] RIP: 0033:0x7f6a0005bd82 [ 29.265556] 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 [ 29.267705] RSP: 002b:00007ffe9508b0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.268612] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a0005bd82 [ 29.269458] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69ff495000 [ 29.270308] RBP: 00007f69ff495000 R08: 0000000000000009 R09: 0000000000001000 [ 29.271263] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ba62adec0 [ 29.272116] R13: 00007ffe9508b100 R14: 00007ffe9508b130 R15: 00007ffe9508b490 [ 29.272973] [ 29.273261] [ 29.273473] Allocated by task 212: [ 29.273898] kasan_save_stack+0x22/0x50 [ 29.274406] kasan_set_track+0x25/0x30 [ 29.274895] __kasan_slab_alloc+0x59/0x70 [ 29.275414] kmem_cache_alloc+0x16b/0x370 [ 29.275950] vm_area_dup+0x20/0x160 [ 29.276407] __split_vma+0x170/0x950 [ 29.276878] split_vma+0xc6/0x110 [ 29.277316] mprotect_fixup+0x8d2/0xb30 [ 29.277816] do_mprotect_pkey+0x87e/0xd40 [ 29.278336] __x64_sys_mprotect+0x78/0xc0 [ 29.278852] do_syscall_64+0x3f/0x90 [ 29.279321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.279972] [ 29.280185] Freed by task 13: [ 29.280567] kasan_save_stack+0x22/0x50 [ 29.281071] kasan_set_track+0x25/0x30 [ 29.281561] kasan_save_free_info+0x2b/0x50 [ 29.282090] __kasan_slab_free+0x10a/0x190 [ 29.282620] kmem_cache_free+0x10d/0x4d0 [ 29.283129] rcu_core+0x8c8/0x2860 [ 29.283578] __do_softirq+0x1b7/0x7d4 [ 29.284049] [ 29.284262] Last potentially related work creation: [ 29.284845] kasan_save_stack+0x22/0x50 [ 29.285341] __kasan_record_aux_stack+0x8e/0xa0 [ 29.285909] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.286546] remove_vma+0x139/0x170 [ 29.286996] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.287573] do_vmi_munmap+0x1f1/0x2b0 [ 29.288056] __vm_munmap+0x138/0x3a0 [ 29.288522] __x64_sys_munmap+0x59/0x80 [ 29.289015] do_syscall_64+0x3f/0x90 [ 29.289488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.290137] [ 29.290352] The buggy address belongs to the object at ffff88800f103bc8 [ 29.290352] which belongs to the cache vm_area_struct of size 168 [ 29.291823] The buggy address is located 88 bytes inside of [ 29.291823] freed 168-byte region [ffff88800f103bc8, ffff88800f103c70) [ 29.293230] [ 29.293443] The buggy address belongs to the physical page: [ 29.294105] page:0000000022e33187 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf103 [ 29.295190] memcg:ffff88800ea0d101 [ 29.295632] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.296276] page_type: 0xffffffff() [ 29.296725] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.297646] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea0d101 [ 29.298554] page dumped because: kasan: bad access detected [ 29.299210] [ 29.299424] Memory state around the buggy address: [ 29.300027] ffff88800f103b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.300886] ffff88800f103b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.301736] >ffff88800f103c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.302584] ^ [ 29.303106] ffff88800f103c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.303968] ffff88800f103d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.304813] ================================================================== [ 29.305987] Disabling lock debugging due to kernel taint [ 31.729234] BUG: Bad rss-counter state mm:0000000041d3fdc7 type:MM_FILEPAGES val:33 [ 31.730429] BUG: Bad rss-counter state mm:0000000041d3fdc7 type:MM_ANONPAGES val:22 [ 32.102774] BUG: Bad rss-counter state mm:000000009be8ca43 type:MM_FILEPAGES val:33 [ 32.103560] BUG: Bad rss-counter state mm:000000009be8ca43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8585' (ECDSA) to the list of known hosts. 2023/06/20 04:05:16 fuzzer started 2023/06/20 04:05:16 dialing manager at localhost:44161 2023/06/20 04:05:16 checking machine... 2023/06/20 04:05:16 checking revisions... [ 32.903245] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:05:16 testing simple program... [ 32.969704] cgroup: Unknown subsys name 'net' [ 33.032289] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:05:15 Registers: info registers vcpu 0 RAX=ffffffff863b7221 RBX=0000000000000001 RCX=ffffffff863b721c RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff863b7220 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008b7b8 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130abf RFL=00000246 [---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 00007f7aadb0c900 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=00007f7aad02c000 CR3=000000000d49e000 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=7d9d375b2ed84a83de46f9d051cc5b53 XMM02=ec2efd57dc4c00df000000000011cc10 XMM03=9f42ef2216c6d10b000000000011cce0 XMM04=4759a586b1954aa500000000000ae988 XMM05=cd194a6c2f462d230000000000134f00 XMM06=4fda316b135da52b0000000000133fa0 XMM07=fb795ef6d65770560000000000123da0 XMM08=2c67c8bc2e329bc3000000000011cc80 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800efc89e8 RCX=1ffff11001df9144 RDX=dffffc0000000000 RSI=ffff88801a34b2a0 RDI=ffff88800efc8a20 RBP=ffff88800efc89f0 RSP=ffff88800fc8fbc8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88801a34b280 R13=0000000000000000 R14=ffff888018323af8 R15=ffff888018323ab0 RIP=ffffffff8184754c 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 00007f9f36385900 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=00007f9f3693c618 CR3=000000000ddcc000 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