syzkaller login: [ 35.329406] BUG: Bad rss-counter state mm:0000000086103ddc type:MM_FILEPAGES val:33 [ 35.330783] BUG: Bad rss-counter state mm:0000000086103ddc type:MM_ANONPAGES val:22 [ 35.401492] ================================================================== [ 35.402418] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.403350] Read of size 8 at addr ffff88800eec5140 by task sshd/219 [ 35.404120] [ 35.404338] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.405319] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.406323] Call Trace: [ 35.406643] [ 35.406935] dump_stack_lvl+0x91/0xf0 [ 35.407427] print_report+0xcc/0x620 [ 35.407917] ? __virt_addr_valid+0x102/0x340 [ 35.408479] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.409099] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.409718] kasan_report+0xbe/0xf0 [ 35.410202] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.410832] vma_interval_tree_remove+0xc75/0xec0 [ 35.411451] vma_prepare+0xc54/0x11a0 [ 35.411929] __split_vma+0x5af/0x950 [ 35.412409] ? __pfx___split_vma+0x10/0x10 [ 35.412937] ? find_held_lock+0x2c/0x110 [ 35.413463] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.414025] ? lock_is_held_type+0x9f/0x120 [ 35.414576] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.415188] ? mtree_range_walk+0x632/0x900 [ 35.415739] ? mas_walk+0x5c7/0x7c0 [ 35.416218] do_vmi_munmap+0x1f1/0x2b0 [ 35.416718] mmap_region+0x1f9/0x2660 [ 35.417205] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.417722] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.418469] ? __pfx_lock_acquire+0x10/0x10 [ 35.419006] ? __pfx_mmap_region+0x10/0x10 [ 35.419566] ? security_mmap_addr+0x7d/0xa0 [ 35.420142] ? get_unmapped_area+0x1f5/0x3f0 [ 35.420723] do_mmap+0x854/0xf00 [ 35.421179] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.421694] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.422297] ksys_mmap_pgoff+0x3af/0x500 [ 35.422833] do_syscall_64+0x3f/0x90 [ 35.423336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.424005] RIP: 0033:0x7fe354841d82 [ 35.424484] 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 [ 35.426739] RSP: 002b:00007ffc49a2cc68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.427669] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe354841d82 [ 35.428524] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe353c7b000 [ 35.429367] RBP: 00007fe353c7b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.430224] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4bcfb2d90 [ 35.431062] R13: 00007ffc49a2cc80 R14: 00007ffc49a2ccb0 R15: 00007ffc49a2d010 [ 35.431915] [ 35.432204] [ 35.432425] Allocated by task 212: [ 35.432856] kasan_save_stack+0x22/0x50 [ 35.433364] kasan_set_track+0x25/0x30 [ 35.433861] __kasan_slab_alloc+0x59/0x70 [ 35.434388] kmem_cache_alloc+0x16b/0x370 [ 35.434908] vm_area_dup+0x20/0x160 [ 35.435377] __split_vma+0x170/0x950 [ 35.435863] split_vma+0xc6/0x110 [ 35.436329] mprotect_fixup+0x8d2/0xb30 [ 35.436855] do_mprotect_pkey+0x87e/0xd40 [ 35.437403] __x64_sys_mprotect+0x78/0xc0 [ 35.437953] do_syscall_64+0x3f/0x90 [ 35.438465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.439136] [ 35.439358] Freed by task 212: [ 35.439768] kasan_save_stack+0x22/0x50 [ 35.440288] kasan_set_track+0x25/0x30 [ 35.440803] kasan_save_free_info+0x2b/0x50 [ 35.441359] __kasan_slab_free+0x10a/0x190 [ 35.441923] kmem_cache_free+0x10d/0x4d0 [ 35.442475] rcu_core+0x8c8/0x2860 [ 35.442937] __do_softirq+0x1b7/0x7d4 [ 35.443438] [ 35.443664] Last potentially related work creation: [ 35.444270] kasan_save_stack+0x22/0x50 [ 35.444806] __kasan_record_aux_stack+0x8e/0xa0 [ 35.445414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.446150] remove_vma+0x139/0x170 [ 35.446602] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.447172] do_vmi_munmap+0x1f1/0x2b0 [ 35.447654] __vm_munmap+0x138/0x3a0 [ 35.448118] __x64_sys_munmap+0x59/0x80 [ 35.448606] do_syscall_64+0x3f/0x90 [ 35.449075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.449718] [ 35.449932] The buggy address belongs to the object at ffff88800eec50e8 [ 35.449932] which belongs to the cache vm_area_struct of size 168 [ 35.451412] The buggy address is located 88 bytes inside of [ 35.451412] freed 168-byte region [ffff88800eec50e8, ffff88800eec5190) [ 35.452804] [ 35.453020] The buggy address belongs to the physical page: [ 35.453680] page:0000000013ac8897 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeec5 [ 35.454770] memcg:ffff88801a3cfd01 [ 35.455198] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.455849] page_type: 0xffffffff() [ 35.456298] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.457218] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3cfd01 [ 35.458145] page dumped because: kasan: bad access detected [ 35.458811] [ 35.459025] Memory state around the buggy address: [ 35.459607] ffff88800eec5000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.460457] ffff88800eec5080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 35.461321] >ffff88800eec5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.462200] ^ [ 35.462838] ffff88800eec5180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.463704] ffff88800eec5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.464570] ================================================================== [ 35.465592] Disabling lock debugging due to kernel taint [ 37.838191] BUG: Bad rss-counter state mm:0000000091c02b7d type:MM_FILEPAGES val:33 [ 37.839499] BUG: Bad rss-counter state mm:0000000091c02b7d type:MM_ANONPAGES val:22 [ 38.217333] BUG: Bad rss-counter state mm:00000000b615dcb7 type:MM_FILEPAGES val:33 [ 38.218438] BUG: Bad rss-counter state mm:00000000b615dcb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34017' (ECDSA) to the list of known hosts. 2023/06/19 13:58:15 fuzzer started 2023/06/19 13:58:15 dialing manager at localhost:44161 2023/06/19 13:58:16 checking machine... 2023/06/19 13:58:16 checking revisions... [ 38.929732] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:58:16 testing simple program... [ 38.971691] cgroup: Unknown subsys name 'net' [ 39.030212] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:58:11 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000255 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff844b1d90 RDI=ffffffff85d3bed0 RBP=ffff88801477ff58 RSP=ffff88801477fed0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000007 R13=00007f9c720bfcf0 R14=ffff888013dc51d0 R15=ffff888014581280 RIP=ffffffff814c07eb 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9c72c46900 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=00007f9c720bfcf0 CR3=000000000e8b6000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a21bcee8683d548100000000000ae988 XMM05=72b2add8527f9f6a0000000000134358 XMM06=6dbef0500961bc7c0000000000133400 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800ee3bb18 RCX=1ffff11001dc776a RDX=1ffff11001dc7765 RSI=ffffffff87b86f80 RDI=ffff88800e789d88 RBP=ffff88800e789d78 RSP=ffff88800bee79e8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800d0b3528 R13=0000000000000000 R14=ffff88800ee3bb28 R15=ffff88800ee3bb18 RIP=ffffffff844cdf16 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 00007fc8bae55900 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=00007ffcb1068000 CR3=0000000016816000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000