syzkaller login: [ 30.586506] BUG: Bad rss-counter state mm:000000007310f0d7 type:MM_FILEPAGES val:33 [ 30.587805] BUG: Bad rss-counter state mm:000000007310f0d7 type:MM_ANONPAGES val:22 [ 30.757230] ================================================================== [ 30.758295] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.759385] Read of size 8 at addr ffff88801bc1e140 by task sshd/219 [ 30.760344] [ 30.760600] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.761589] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.762704] Call Trace: [ 30.763078] [ 30.763407] dump_stack_lvl+0x91/0xf0 [ 30.764010] print_report+0xcc/0x620 [ 30.764569] ? __virt_addr_valid+0x102/0x340 [ 30.765207] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.765912] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.766621] kasan_report+0xbe/0xf0 [ 30.767194] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.767947] vma_interval_tree_remove+0xc75/0xec0 [ 30.768664] vma_prepare+0xc54/0x11a0 [ 30.769243] __split_vma+0x5af/0x950 [ 30.769810] ? __pfx___split_vma+0x10/0x10 [ 30.770443] ? find_held_lock+0x2c/0x110 [ 30.771062] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.771752] ? lock_is_held_type+0x9f/0x120 [ 30.772402] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.773135] ? mtree_range_walk+0x632/0x900 [ 30.773805] ? mas_walk+0x5c7/0x7c0 [ 30.774376] do_vmi_munmap+0x1f1/0x2b0 [ 30.774968] mmap_region+0x1f9/0x2660 [ 30.775562] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.776175] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.777026] ? __pfx_lock_acquire+0x10/0x10 [ 30.777658] ? __pfx_mmap_region+0x10/0x10 [ 30.778283] ? security_mmap_addr+0x7d/0xa0 [ 30.778913] ? get_unmapped_area+0x1f5/0x3f0 [ 30.779576] do_mmap+0x854/0xf00 [ 30.780097] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.780687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.781359] ksys_mmap_pgoff+0x3af/0x500 [ 30.781969] do_syscall_64+0x3f/0x90 [ 30.782539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783315] RIP: 0033:0x7fba88caad82 [ 30.783880] 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 [ 30.786442] RSP: 002b:00007ffeecf6a918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.787530] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba88caad82 [ 30.788544] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba880e4000 [ 30.789557] RBP: 00007fba880e4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.790570] R10: 0000000000000812 R11: 0000000000000206 R12: 000055908314ad90 [ 30.791601] R13: 00007ffeecf6a930 R14: 00007ffeecf6a960 R15: 00007ffeecf6acc0 [ 30.792623] [ 30.792967] [ 30.793222] Allocated by task 212: [ 30.793732] kasan_save_stack+0x22/0x50 [ 30.794335] kasan_set_track+0x25/0x30 [ 30.794921] __kasan_slab_alloc+0x59/0x70 [ 30.795558] kmem_cache_alloc+0x16b/0x370 [ 30.796178] vm_area_dup+0x20/0x160 [ 30.796716] __split_vma+0x170/0x950 [ 30.797265] split_vma+0xc6/0x110 [ 30.797790] mprotect_fixup+0x8d2/0xb30 [ 30.798383] do_mprotect_pkey+0x87e/0xd40 [ 30.799003] __x64_sys_mprotect+0x78/0xc0 [ 30.799631] do_syscall_64+0x3f/0x90 [ 30.800196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800965] [ 30.801219] Freed by task 212: [ 30.801682] kasan_save_stack+0x22/0x50 [ 30.802277] kasan_set_track+0x25/0x30 [ 30.802865] kasan_save_free_info+0x2b/0x50 [ 30.803513] __kasan_slab_free+0x10a/0x190 [ 30.804146] kmem_cache_free+0x10d/0x4d0 [ 30.804745] rcu_core+0x8c8/0x2860 [ 30.805273] __do_softirq+0x1b7/0x7d4 [ 30.805843] [ 30.806100] Last potentially related work creation: [ 30.806799] kasan_save_stack+0x22/0x50 [ 30.807404] __kasan_record_aux_stack+0x8e/0xa0 [ 30.808095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.808845] remove_vma+0x139/0x170 [ 30.809372] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.810011] do_vmi_munmap+0x1f1/0x2b0 [ 30.810566] __vm_munmap+0x138/0x3a0 [ 30.811105] __x64_sys_munmap+0x59/0x80 [ 30.811698] do_syscall_64+0x3f/0x90 [ 30.812257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812998] [ 30.813245] The buggy address belongs to the object at ffff88801bc1e0e8 [ 30.813245] which belongs to the cache vm_area_struct of size 168 [ 30.814929] The buggy address is located 88 bytes inside of [ 30.814929] freed 168-byte region [ffff88801bc1e0e8, ffff88801bc1e190) [ 30.816533] [ 30.816781] The buggy address belongs to the physical page: [ 30.817572] page:00000000466880fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc1e [ 30.818886] memcg:ffff88800d8b0301 [ 30.819395] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.820182] page_type: 0xffffffff() [ 30.820726] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.821832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8b0301 [ 30.822911] page dumped because: kasan: bad access detected [ 30.823715] [ 30.823968] Memory state around the buggy address: [ 30.824649] ffff88801bc1e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.825674] ffff88801bc1e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.826681] >ffff88801bc1e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.827700] ^ [ 30.828469] ffff88801bc1e180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.829480] ffff88801bc1e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.830487] ================================================================== [ 30.831757] Disabling lock debugging due to kernel taint [ 32.664654] BUG: Bad rss-counter state mm:00000000bd33b15b type:MM_FILEPAGES val:33 [ 32.665576] BUG: Bad rss-counter state mm:00000000bd33b15b type:MM_ANONPAGES val:22 [ 33.213720] BUG: Bad rss-counter state mm:00000000a5e462f6 type:MM_FILEPAGES val:33 [ 33.214749] BUG: Bad rss-counter state mm:00000000a5e462f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20254' (ECDSA) to the list of known hosts. 2023/06/21 03:30:44 fuzzer started 2023/06/21 03:30:45 dialing manager at localhost:36067 2023/06/21 03:30:45 checking machine... 2023/06/21 03:30:45 checking revisions... [ 33.862310] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:30:45 testing simple program... [ 33.907246] cgroup: Unknown subsys name 'net' [ 33.950657] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:30:44 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffff88801677e160 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88801677e164 RBP=1ffff110028f7f1e RSP=ffff8880147bf8e8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88801677e160 R13=0000000000000001 R14=0000607f92e0bec4 R15=0000000000000010 RIP=ffffffff812e009a 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 00007efcd3d16900 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=00007efcd3177530 CR3=000000000b3a4000 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=3bee8a3eee5666f000000000000ae988 XMM05=bc0b1a707db4da590000000000132e38 XMM06=88f22fcd947fee2f0000000000131bd8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88806cf09e38 RSI=ffff88806cf09e00 RDI=ffff88806cf09a70 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000fc0c R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888015d13680 R15=ffff888016996f18 RIP=ffffffff81130340 RFL=00000202 [-------] 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 00007ff098b79900 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=00007ffe55248000 CR3=000000000ee46000 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