syzkaller login: [ 36.065944] BUG: Bad rss-counter state mm:000000000e2d6fc0 type:MM_FILEPAGES val:33 [ 36.067691] BUG: Bad rss-counter state mm:000000000e2d6fc0 type:MM_ANONPAGES val:22 [ 36.223403] ================================================================== [ 36.224528] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.225729] Read of size 8 at addr ffff888009522a50 by task sshd/220 [ 36.226653] [ 36.226871] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.227752] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.228805] Call Trace: [ 36.229122] [ 36.229415] dump_stack_lvl+0x91/0xf0 [ 36.229911] print_report+0xcc/0x620 [ 36.230407] ? __virt_addr_valid+0x102/0x340 [ 36.230975] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.231620] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.232253] kasan_report+0xbe/0xf0 [ 36.232749] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.233383] vma_interval_tree_remove+0xc75/0xec0 [ 36.234004] vma_prepare+0xc54/0x11a0 [ 36.234489] __split_vma+0x5af/0x950 [ 36.234963] ? __pfx___split_vma+0x10/0x10 [ 36.235497] ? find_held_lock+0x2c/0x110 [ 36.236027] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.236622] ? lock_is_held_type+0x9f/0x120 [ 36.237167] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.237772] ? mtree_range_walk+0x632/0x900 [ 36.238337] ? mas_walk+0x5c7/0x7c0 [ 36.238815] do_vmi_munmap+0x1f1/0x2b0 [ 36.239336] mmap_region+0x1f9/0x2660 [ 36.239824] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.240343] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.241066] ? __pfx_lock_acquire+0x10/0x10 [ 36.241606] ? __pfx_mmap_region+0x10/0x10 [ 36.242145] ? security_mmap_addr+0x7d/0xa0 [ 36.242679] ? get_unmapped_area+0x1f5/0x3f0 [ 36.243232] do_mmap+0x854/0xf00 [ 36.243676] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.244182] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.244773] ksys_mmap_pgoff+0x3af/0x500 [ 36.245287] do_syscall_64+0x3f/0x90 [ 36.245773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.246416] RIP: 0033:0x7f9a06bb2d82 [ 36.246873] 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 [ 36.249007] RSP: 002b:00007ffd5774a0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.249931] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a06bb2d82 [ 36.250783] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a05fec000 [ 36.251648] RBP: 00007f9a05fec000 R08: 0000000000000009 R09: 0000000000001000 [ 36.252533] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556915223b20 [ 36.253404] R13: 00007ffd5774a110 R14: 00007ffd5774a140 R15: 00007ffd5774a4a0 [ 36.254293] [ 36.254587] [ 36.254803] Allocated by task 213: [ 36.255235] kasan_save_stack+0x22/0x50 [ 36.255756] kasan_set_track+0x25/0x30 [ 36.256247] __kasan_slab_alloc+0x59/0x70 [ 36.256791] kmem_cache_alloc+0x16b/0x370 [ 36.257326] vm_area_dup+0x20/0x160 [ 36.257798] __split_vma+0x170/0x950 [ 36.258269] split_vma+0xc6/0x110 [ 36.258723] mprotect_fixup+0x8d2/0xb30 [ 36.259251] do_mprotect_pkey+0x87e/0xd40 [ 36.259801] __x64_sys_mprotect+0x78/0xc0 [ 36.260357] do_syscall_64+0x3f/0x90 [ 36.260863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.261527] [ 36.261751] Freed by task 204: [ 36.262174] kasan_save_stack+0x22/0x50 [ 36.262700] kasan_set_track+0x25/0x30 [ 36.263228] kasan_save_free_info+0x2b/0x50 [ 36.263796] __kasan_slab_free+0x10a/0x190 [ 36.264387] kmem_cache_free+0x10d/0x4d0 [ 36.264939] rcu_core+0x8c8/0x2860 [ 36.265420] __do_softirq+0x1b7/0x7d4 [ 36.265932] [ 36.266155] Last potentially related work creation: [ 36.266764] kasan_save_stack+0x22/0x50 [ 36.267383] __kasan_record_aux_stack+0x8e/0xa0 [ 36.267989] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.268680] remove_vma+0x139/0x170 [ 36.269154] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.269744] do_vmi_munmap+0x1f1/0x2b0 [ 36.270259] __vm_munmap+0x138/0x3a0 [ 36.270751] __x64_sys_munmap+0x59/0x80 [ 36.271275] do_syscall_64+0x3f/0x90 [ 36.271776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.272470] [ 36.272698] The buggy address belongs to the object at ffff8880095229f8 [ 36.272698] which belongs to the cache vm_area_struct of size 168 [ 36.274264] The buggy address is located 88 bytes inside of [ 36.274264] freed 168-byte region [ffff8880095229f8, ffff888009522aa0) [ 36.275784] [ 36.276016] The buggy address belongs to the physical page: [ 36.276719] page:000000001368b6aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9522 [ 36.277863] memcg:ffff88800b4fe701 [ 36.278314] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.279053] page_type: 0xffffffff() [ 36.279532] raw: 0100000000000200 ffff8880087a0c80 ffffea00002597c0 dead000000000005 [ 36.280524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b4fe701 [ 36.281507] page dumped because: kasan: bad access detected [ 36.282220] [ 36.282450] Memory state around the buggy address: [ 36.283055] ffff888009522900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.283975] ffff888009522980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 36.284904] >ffff888009522a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.285804] ^ [ 36.286560] ffff888009522a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 36.287470] ffff888009522b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.288399] ================================================================== [ 36.289475] Disabling lock debugging due to kernel taint [ 38.403329] BUG: Bad rss-counter state mm:0000000003751dd1 type:MM_FILEPAGES val:33 [ 38.404267] BUG: Bad rss-counter state mm:0000000003751dd1 type:MM_ANONPAGES val:22 [ 38.855934] BUG: Bad rss-counter state mm:00000000424f297b type:MM_FILEPAGES val:33 [ 38.857141] BUG: Bad rss-counter state mm:00000000424f297b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10619' (ECDSA) to the list of known hosts. 2023/06/20 15:38:05 fuzzer started 2023/06/20 15:38:05 dialing manager at localhost:36067 2023/06/20 15:38:05 checking machine... 2023/06/20 15:38:05 checking revisions... [ 39.582420] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:38:05 testing simple program... [ 39.635257] cgroup: Unknown subsys name 'net' [ 39.683717] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:38:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c64781c RCX=0000000000000000 RDX=ffff888014659b40 RSI=ffffffff844b7e4c RDI=0000000000000007 RBP=dffffc0000000000 RSP=ffff88801476fd68 R8 =0000000000000007 R9 =0000000000001000 R10=ffff88800c64781e R11=0000000000000000 R12=ffff88800c647800 R13=ffff88801476fe70 R14=ffffffffffffffff R15=1ffff110028edfaf RIP=ffffffff814c0864 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 00007fa0de8be900 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=00007fa0ddcfe2e0 CR3=000000000d84c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c39709d6818c44e000000000000ae988 XMM05=e18f01562e8bdc6c00000000001326d8 XMM06=4fda316b135da52b0000000000131158 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110030693b5 RBX=ffff888018349d78 RCX=1ffff11001e19660 RDX=dffffc0000000000 RSI=ffff88801832a000 RDI=ffff888018349da8 RBP=ffff888016a082d8 RSP=ffff88801639f638 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888018328000 R13=0000000000000000 R14=ffff88800e63d178 R15=ffff88800e63d130 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 00007f83cd603900 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=00007ffce813f000 CR3=000000000ef22000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000