syzkaller login: [ 31.118508] BUG: Bad rss-counter state mm:00000000c5efb6b6 type:MM_FILEPAGES val:33 [ 31.120043] BUG: Bad rss-counter state mm:00000000c5efb6b6 type:MM_ANONPAGES val:22 [ 31.262956] ================================================================== [ 31.264108] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.265420] Read of size 8 at addr ffff88800e8eb6b0 by task sshd/219 [ 31.266372] [ 31.266637] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.267710] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.268748] Call Trace: [ 31.269086] [ 31.269373] dump_stack_lvl+0x91/0xf0 [ 31.269877] print_report+0xcc/0x620 [ 31.270390] ? __virt_addr_valid+0x102/0x340 [ 31.270951] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.271601] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.272236] kasan_report+0xbe/0xf0 [ 31.272716] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.273352] vma_interval_tree_remove+0xc75/0xec0 [ 31.273960] vma_prepare+0xc54/0x11a0 [ 31.274460] __split_vma+0x5af/0x950 [ 31.274936] ? __pfx___split_vma+0x10/0x10 [ 31.275495] ? find_held_lock+0x2c/0x110 [ 31.276047] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.276622] ? lock_is_held_type+0x9f/0x120 [ 31.277211] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.278021] ? mtree_range_walk+0x632/0x900 [ 31.278745] ? mas_walk+0x5c7/0x7c0 [ 31.279371] do_vmi_munmap+0x1f1/0x2b0 [ 31.280054] mmap_region+0x1f9/0x2660 [ 31.280683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.281345] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.282272] ? __pfx_lock_acquire+0x10/0x10 [ 31.282964] ? __pfx_mmap_region+0x10/0x10 [ 31.283627] ? security_mmap_addr+0x7d/0xa0 [ 31.284181] ? get_unmapped_area+0x1f5/0x3f0 [ 31.284736] do_mmap+0x854/0xf00 [ 31.285206] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.285704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.286288] ksys_mmap_pgoff+0x3af/0x500 [ 31.286794] do_syscall_64+0x3f/0x90 [ 31.287294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287955] RIP: 0033:0x7f5090989d82 [ 31.288434] 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 [ 31.290600] RSP: 002b:00007fffe16b9cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.291556] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5090989d82 [ 31.292422] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f508fdc3000 [ 31.293297] RBP: 00007f508fdc3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.294156] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556fe7262d90 [ 31.294994] R13: 00007fffe16b9d10 R14: 00007fffe16b9d40 R15: 00007fffe16ba0a0 [ 31.295890] [ 31.296204] [ 31.296424] Allocated by task 212: [ 31.296853] kasan_save_stack+0x22/0x50 [ 31.297386] kasan_set_track+0x25/0x30 [ 31.297883] __kasan_slab_alloc+0x59/0x70 [ 31.298427] kmem_cache_alloc+0x16b/0x370 [ 31.298950] vm_area_dup+0x20/0x160 [ 31.299437] __split_vma+0x170/0x950 [ 31.299934] split_vma+0xc6/0x110 [ 31.300394] mprotect_fixup+0x8d2/0xb30 [ 31.300893] do_mprotect_pkey+0x87e/0xd40 [ 31.301435] __x64_sys_mprotect+0x78/0xc0 [ 31.301960] do_syscall_64+0x3f/0x90 [ 31.302462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.303131] [ 31.303348] Freed by task 203: [ 31.303758] kasan_save_stack+0x22/0x50 [ 31.304292] kasan_set_track+0x25/0x30 [ 31.304792] kasan_save_free_info+0x2b/0x50 [ 31.305345] __kasan_slab_free+0x10a/0x190 [ 31.305892] kmem_cache_free+0x10d/0x4d0 [ 31.306456] rcu_core+0x8c8/0x2860 [ 31.306909] __do_softirq+0x1b7/0x7d4 [ 31.307421] [ 31.307669] Last potentially related work creation: [ 31.308280] kasan_save_stack+0x22/0x50 [ 31.308790] __kasan_record_aux_stack+0x8e/0xa0 [ 31.309384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.310023] remove_vma+0x139/0x170 [ 31.310489] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.311074] do_vmi_munmap+0x1f1/0x2b0 [ 31.311573] __vm_munmap+0x138/0x3a0 [ 31.312049] __x64_sys_munmap+0x59/0x80 [ 31.312574] do_syscall_64+0x3f/0x90 [ 31.313070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313719] [ 31.313939] The buggy address belongs to the object at ffff88800e8eb658 [ 31.313939] which belongs to the cache vm_area_struct of size 168 [ 31.315423] The buggy address is located 88 bytes inside of [ 31.315423] freed 168-byte region [ffff88800e8eb658, ffff88800e8eb700) [ 31.316865] [ 31.317098] The buggy address belongs to the physical page: [ 31.317760] page:00000000258b7cd6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8eb [ 31.318863] memcg:ffff88800dca2801 [ 31.319304] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.319971] page_type: 0xffffffff() [ 31.320465] raw: 0100000000000200 ffff8880087a0c80 ffffea0000407ac0 dead000000000002 [ 31.321407] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dca2801 [ 31.322319] page dumped because: kasan: bad access detected [ 31.322982] [ 31.323218] Memory state around the buggy address: [ 31.323801] ffff88800e8eb580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.324707] ffff88800e8eb600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.325578] >ffff88800e8eb680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.326445] ^ [ 31.327035] ffff88800e8eb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.327919] ffff88800e8eb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.328782] ================================================================== [ 31.329735] Disabling lock debugging due to kernel taint [ 33.290962] BUG: Bad rss-counter state mm:00000000f5a389f0 type:MM_FILEPAGES val:33 [ 33.292205] BUG: Bad rss-counter state mm:00000000f5a389f0 type:MM_ANONPAGES val:22 [ 33.756997] BUG: Bad rss-counter state mm:000000001f4bcb53 type:MM_FILEPAGES val:33 [ 33.757762] BUG: Bad rss-counter state mm:000000001f4bcb53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22523' (ECDSA) to the list of known hosts. 2023/06/20 12:34:27 fuzzer started 2023/06/20 12:34:27 dialing manager at localhost:36067 2023/06/20 12:34:27 checking machine... 2023/06/20 12:34:27 checking revisions... [ 34.386812] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:34:27 testing simple program... [ 34.420797] cgroup: Unknown subsys name 'net' [ 34.456315] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:34:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801467b680 RSI=ffffffff84088d85 RDI=0000000000000005 RBP=ffffffff85c58c00 RSP=ffff888015be7b98 R8 =0000000000000005 R9 =0000000000000010 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888015be7d28 R13=0000000000000000 R14=ffffffff85a63bc0 R15=0000000000000001 RIP=ffffffff814c089b 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 00007f223ed32900 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=00007f223f2e9618 CR3=00000000168c8000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b40 RCX=0000000000000001 RDX=1ffff1100d9e137c RSI=ffffffff813782f8 RDI=ffff88806cf09b4c RBP=ffff88806cf09be0 RSP=ffff88806cf09a58 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000244d5 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800da8cb00 RIP=ffffffff813ad543 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 0000000000000000 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=00007f114150b8d0 CR3=000000000ca52000 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=e3ccf50c34d8ea94b045a0e7045d3120 XMM02=2c67c8bc2e329bc3000000000011a600 XMM03=fb795ef6d65770560000000000121488 XMM04=fbe2e220bc3b05af00000000000ae988 XMM05=19e9129bd510f2350000000000131258 XMM06=e244177cbb0a85480000000000130430 XMM07=e042d86d42eb936e0000000000121760 XMM08=9ccf0b164ac42f9f000000000011a660 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000