syzkaller login: [ 30.436555] BUG: Bad rss-counter state mm:00000000fe2b11ad type:MM_FILEPAGES val:33 [ 30.437849] BUG: Bad rss-counter state mm:00000000fe2b11ad type:MM_ANONPAGES val:22 [ 30.599366] ================================================================== [ 30.600450] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.601552] Read of size 8 at addr ffff88800fd8c5c8 by task sshd/220 [ 30.602465] [ 30.602728] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.603750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.604895] Call Trace: [ 30.605269] [ 30.605603] dump_stack_lvl+0x91/0xf0 [ 30.606186] print_report+0xcc/0x620 [ 30.606787] ? __virt_addr_valid+0x102/0x340 [ 30.607392] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.608021] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.608650] kasan_report+0xbe/0xf0 [ 30.609134] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.609763] vma_interval_tree_remove+0xc75/0xec0 [ 30.610382] vma_prepare+0xc54/0x11a0 [ 30.610869] __split_vma+0x5af/0x950 [ 30.611351] ? __pfx___split_vma+0x10/0x10 [ 30.611880] ? find_held_lock+0x2c/0x110 [ 30.612408] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.612978] ? lock_is_held_type+0x9f/0x120 [ 30.613523] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.614142] ? mtree_range_walk+0x632/0x900 [ 30.614706] ? mas_walk+0x5c7/0x7c0 [ 30.615186] do_vmi_munmap+0x1f1/0x2b0 [ 30.615683] mmap_region+0x1f9/0x2660 [ 30.616167] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.616677] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.617399] ? __pfx_lock_acquire+0x10/0x10 [ 30.617935] ? __pfx_mmap_region+0x10/0x10 [ 30.618492] ? security_mmap_addr+0x7d/0xa0 [ 30.619023] ? get_unmapped_area+0x1f5/0x3f0 [ 30.619574] do_mmap+0x854/0xf00 [ 30.620015] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.620507] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.621080] ksys_mmap_pgoff+0x3af/0x500 [ 30.621590] do_syscall_64+0x3f/0x90 [ 30.622072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.622724] RIP: 0033:0x7f6e768cdd82 [ 30.623180] 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 [ 30.625335] RSP: 002b:00007ffef18f54f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.626244] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e768cdd82 [ 30.627104] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e75d07000 [ 30.627955] RBP: 00007f6e75d07000 R08: 0000000000000009 R09: 0000000000001000 [ 30.628815] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ef840cec0 [ 30.629671] R13: 00007ffef18f5510 R14: 00007ffef18f5540 R15: 00007ffef18f58a0 [ 30.630564] [ 30.630858] [ 30.631075] Allocated by task 213: [ 30.631510] kasan_save_stack+0x22/0x50 [ 30.632013] kasan_set_track+0x25/0x30 [ 30.632511] __kasan_slab_alloc+0x59/0x70 [ 30.633041] kmem_cache_alloc+0x16b/0x370 [ 30.633557] vm_area_dup+0x20/0x160 [ 30.634011] __split_vma+0x170/0x950 [ 30.634497] split_vma+0xc6/0x110 [ 30.634939] mprotect_fixup+0x8d2/0xb30 [ 30.635453] do_mprotect_pkey+0x87e/0xd40 [ 30.635974] __x64_sys_mprotect+0x78/0xc0 [ 30.636504] do_syscall_64+0x3f/0x90 [ 30.636986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.637639] [ 30.637857] Freed by task 203: [ 30.638251] kasan_save_stack+0x22/0x50 [ 30.638773] kasan_set_track+0x25/0x30 [ 30.639272] kasan_save_free_info+0x2b/0x50 [ 30.639803] __kasan_slab_free+0x10a/0x190 [ 30.640342] kmem_cache_free+0x10d/0x4d0 [ 30.640856] rcu_core+0x8c8/0x2860 [ 30.641306] __do_softirq+0x1b7/0x7d4 [ 30.641790] [ 30.642008] Last potentially related work creation: [ 30.642607] kasan_save_stack+0x22/0x50 [ 30.643115] __kasan_record_aux_stack+0x8e/0xa0 [ 30.643697] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.644348] remove_vma+0x139/0x170 [ 30.644803] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.645367] do_vmi_munmap+0x1f1/0x2b0 [ 30.645855] __vm_munmap+0x138/0x3a0 [ 30.646325] __x64_sys_munmap+0x59/0x80 [ 30.646848] do_syscall_64+0x3f/0x90 [ 30.647329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.647977] [ 30.648243] The buggy address belongs to the object at ffff88800fd8c570 [ 30.648243] which belongs to the cache vm_area_struct of size 168 [ 30.650137] The buggy address is located 88 bytes inside of [ 30.650137] freed 168-byte region [ffff88800fd8c570, ffff88800fd8c618) [ 30.651788] [ 30.652011] The buggy address belongs to the physical page: [ 30.652696] page:0000000073f682cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd8c [ 30.653808] memcg:ffff88800f327101 [ 30.654238] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.654976] page_type: 0xffffffff() [ 30.655432] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.656358] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f327101 [ 30.657274] page dumped because: kasan: bad access detected [ 30.657947] [ 30.658163] Memory state around the buggy address: [ 30.658758] ffff88800fd8c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.659625] ffff88800fd8c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.660485] >ffff88800fd8c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.661366] ^ [ 30.662060] ffff88800fd8c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.662934] ffff88800fd8c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.663806] ================================================================== [ 30.664942] Disabling lock debugging due to kernel taint [ 32.593137] BUG: Bad rss-counter state mm:0000000045f86516 type:MM_FILEPAGES val:33 [ 32.594529] BUG: Bad rss-counter state mm:0000000045f86516 type:MM_ANONPAGES val:22 [ 33.084133] BUG: Bad rss-counter state mm:000000003bb9770c type:MM_FILEPAGES val:33 [ 33.085288] BUG: Bad rss-counter state mm:000000003bb9770c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52818' (ECDSA) to the list of known hosts. 2023/06/20 12:29:01 fuzzer started 2023/06/20 12:29:01 dialing manager at localhost:36067 2023/06/20 12:29:01 checking machine... 2023/06/20 12:29:01 checking revisions... [ 33.786257] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:29:02 testing simple program... [ 33.840625] cgroup: Unknown subsys name 'net' [ 33.887313] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:29:01 Registers: info registers vcpu 0 RAX=ffff88800c850000 RBX=ffffffff813ad470 RCX=ffff88806ce09b08 RDX=0000000000000070 RSI=ffff88800c850000 RDI=ffff88806ce09a70 RBP=ffff88806ce09b08 RSP=ffff88806ce09a48 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88806ce09a98 R14=ffff88800c850000 R15=ffff88806ce09a70 RIP=ffffffff81132a8b 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 00007fe336e67900 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=00007ffd33b6f000 CR3=000000000f430000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fb76690aca0 CR3=000000000d9d8000 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=6970380222d7b2afde4966b7aabc22a7 XMM02=000000000011a340ec2efd57dc4c00df XMM03=00000000001218801a10ba6c2701aae6 XMM04=0830640c65c42df500000000000ae988 XMM05=19e9129bd510f2350000000000131758 XMM06=4fda316b135da52b00000000001315e0 XMM07=e042d86d42eb936e0000000000121b00 XMM08=1a10ba6c2701aae6000000000011a3a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000