syzkaller login: [ 38.690896] BUG: Bad rss-counter state mm:000000003c30e709 type:MM_FILEPAGES val:33 [ 38.692356] BUG: Bad rss-counter state mm:000000003c30e709 type:MM_ANONPAGES val:22 [ 38.855379] ================================================================== [ 38.856296] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.857259] Read of size 8 at addr ffff88800ec89b38 by task sshd/218 [ 38.858016] [ 38.858339] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.859230] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.860221] Call Trace: [ 38.860543] [ 38.860826] dump_stack_lvl+0x91/0xf0 [ 38.861367] print_report+0xcc/0x620 [ 38.861846] ? __virt_addr_valid+0x102/0x340 [ 38.862417] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.863033] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.863672] kasan_report+0xbe/0xf0 [ 38.864170] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.864798] vma_interval_tree_remove+0xc75/0xec0 [ 38.865457] vma_prepare+0xc54/0x11a0 [ 38.865953] __split_vma+0x5af/0x950 [ 38.866460] ? __pfx___split_vma+0x10/0x10 [ 38.867007] ? find_held_lock+0x2c/0x110 [ 38.867581] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.868188] ? lock_is_held_type+0x9f/0x120 [ 38.868757] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.869424] ? mtree_range_walk+0x632/0x900 [ 38.869993] ? mas_walk+0x5c7/0x7c0 [ 38.870503] do_vmi_munmap+0x1f1/0x2b0 [ 38.871019] mmap_region+0x1f9/0x2660 [ 38.871549] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.872080] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.872847] ? __pfx_lock_acquire+0x10/0x10 [ 38.873435] ? __pfx_mmap_region+0x10/0x10 [ 38.873982] ? security_mmap_addr+0x7d/0xa0 [ 38.874553] ? get_unmapped_area+0x1f5/0x3f0 [ 38.875144] do_mmap+0x854/0xf00 [ 38.875613] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.876145] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.876732] ksys_mmap_pgoff+0x3af/0x500 [ 38.877287] do_syscall_64+0x3f/0x90 [ 38.877795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.878491] RIP: 0033:0x7f2b42035d82 [ 38.878947] 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 [ 38.881136] RSP: 002b:00007ffd5efc0a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.882078] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b42035d82 [ 38.882936] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b4146f000 [ 38.883810] RBP: 00007f2b4146f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.884688] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d81f13ec0 [ 38.885568] R13: 00007ffd5efc0a80 R14: 00007ffd5efc0ab0 R15: 00007ffd5efc0e10 [ 38.886455] [ 38.886745] [ 38.886964] Allocated by task 211: [ 38.887427] kasan_save_stack+0x22/0x50 [ 38.887932] kasan_set_track+0x25/0x30 [ 38.888458] __kasan_slab_alloc+0x59/0x70 [ 38.888984] kmem_cache_alloc+0x16b/0x370 [ 38.889584] vm_area_dup+0x20/0x160 [ 38.890039] __split_vma+0x170/0x950 [ 38.890528] split_vma+0xc6/0x110 [ 38.890965] mprotect_fixup+0x8d2/0xb30 [ 38.891487] do_mprotect_pkey+0x87e/0xd40 [ 38.892000] __x64_sys_mprotect+0x78/0xc0 [ 38.892537] do_syscall_64+0x3f/0x90 [ 38.893008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.893684] [ 38.893901] Freed by task 211: [ 38.894325] kasan_save_stack+0x22/0x50 [ 38.894827] kasan_set_track+0x25/0x30 [ 38.895346] kasan_save_free_info+0x2b/0x50 [ 38.895874] __kasan_slab_free+0x10a/0x190 [ 38.896412] kmem_cache_free+0x10d/0x4d0 [ 38.896913] rcu_core+0x8c8/0x2860 [ 38.897388] __do_softirq+0x1b7/0x7d4 [ 38.897866] [ 38.898080] Last potentially related work creation: [ 38.898690] kasan_save_stack+0x22/0x50 [ 38.899207] __kasan_record_aux_stack+0x8e/0xa0 [ 38.899783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.900432] remove_vma+0x139/0x170 [ 38.900883] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.901491] do_vmi_munmap+0x1f1/0x2b0 [ 38.901971] __vm_munmap+0x138/0x3a0 [ 38.902469] __x64_sys_munmap+0x59/0x80 [ 38.902961] do_syscall_64+0x3f/0x90 [ 38.903451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.904100] [ 38.904328] Second to last potentially related work creation: [ 38.905021] kasan_save_stack+0x22/0x50 [ 38.905547] __kasan_record_aux_stack+0x8e/0xa0 [ 38.906130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.906788] remove_vma+0x139/0x170 [ 38.907258] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.907811] do_vmi_munmap+0x1f1/0x2b0 [ 38.908437] __vm_munmap+0x138/0x3a0 [ 38.909067] elf_map+0x26f/0x310 [ 38.909689] load_elf_binary+0xd82/0x5030 [ 38.910391] bprm_execve+0x803/0x1940 [ 38.911020] do_execveat_common+0x734/0x8e0 [ 38.911727] __x64_sys_execve+0x93/0xc0 [ 38.912390] do_syscall_64+0x3f/0x90 [ 38.913024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913699] [ 38.913913] The buggy address belongs to the object at ffff88800ec89ae0 [ 38.913913] which belongs to the cache vm_area_struct of size 168 [ 38.915386] The buggy address is located 88 bytes inside of [ 38.915386] freed 168-byte region [ffff88800ec89ae0, ffff88800ec89b88) [ 38.916791] [ 38.917004] The buggy address belongs to the physical page: [ 38.917674] page:000000004865506d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec89 [ 38.918752] memcg:ffff88800f64eb01 [ 38.919173] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.919811] page_type: 0xffffffff() [ 38.920259] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a9000 dead000000000008 [ 38.921163] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f64eb01 [ 38.922084] page dumped because: kasan: bad access detected [ 38.922746] [ 38.922958] Memory state around the buggy address: [ 38.923536] ffff88800ec89a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.924382] ffff88800ec89a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.925314] >ffff88800ec89b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.926195] ^ [ 38.926833] ffff88800ec89b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.927708] ffff88800ec89c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.928572] ================================================================== [ 38.929570] Disabling lock debugging due to kernel taint [ 41.028441] BUG: Bad rss-counter state mm:000000002e5086d0 type:MM_FILEPAGES val:33 [ 41.029449] BUG: Bad rss-counter state mm:000000002e5086d0 type:MM_ANONPAGES val:22 [ 41.459894] BUG: Bad rss-counter state mm:0000000061d5049b type:MM_FILEPAGES val:33 [ 41.460888] BUG: Bad rss-counter state mm:0000000061d5049b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7922' (ECDSA) to the list of known hosts. 2023/06/21 00:00:51 fuzzer started 2023/06/21 00:00:51 dialing manager at localhost:36067 2023/06/21 00:00:51 checking machine... 2023/06/21 00:00:51 checking revisions... [ 42.230767] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:00:51 testing simple program... [ 42.260741] cgroup: Unknown subsys name 'net' [ 42.305272] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:00:50 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff888015814000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff8880168df5a0 RSP=ffff8880168df4f0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff888015814000 R12=ffffea0000560400 R13=ffff888008440ab8 R14=ffff888008442280 R15=ffff8880164bc000 RIP=ffffffff81806a35 RFL=00000002 [-------] 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 00007f4b49eb6900 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=00007ffe6692f000 CR3=000000000c584000 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=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 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=00007fcf4aff8030 CR3=000000000dd8c000 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=2030353a30303a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a30303a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000