syzkaller login: [ 30.514072] BUG: Bad rss-counter state mm:0000000073173589 type:MM_FILEPAGES val:33 [ 30.515734] BUG: Bad rss-counter state mm:0000000073173589 type:MM_ANONPAGES val:22 [ 30.695545] ================================================================== [ 30.696697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.697957] Read of size 8 at addr ffff88801682d6b0 by task sshd/221 [ 30.698964] [ 30.699232] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.700351] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.701446] Call Trace: [ 30.701795] [ 30.702099] dump_stack_lvl+0x91/0xf0 [ 30.702648] print_report+0xcc/0x620 [ 30.703165] ? __virt_addr_valid+0x102/0x340 [ 30.703782] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.704462] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.705136] kasan_report+0xbe/0xf0 [ 30.705663] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.706323] vma_interval_tree_remove+0xc75/0xec0 [ 30.706979] vma_prepare+0xc54/0x11a0 [ 30.707505] __split_vma+0x5af/0x950 [ 30.708043] ? __pfx___split_vma+0x10/0x10 [ 30.708656] ? find_held_lock+0x2c/0x110 [ 30.709216] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.709832] ? lock_is_held_type+0x9f/0x120 [ 30.710407] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.711068] ? mtree_range_walk+0x632/0x900 [ 30.711693] ? mas_walk+0x5c7/0x7c0 [ 30.712218] do_vmi_munmap+0x1f1/0x2b0 [ 30.712766] mmap_region+0x1f9/0x2660 [ 30.713279] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.713835] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.714609] ? __pfx_lock_acquire+0x10/0x10 [ 30.715178] ? __pfx_mmap_region+0x10/0x10 [ 30.715777] ? security_mmap_addr+0x7d/0xa0 [ 30.716363] ? get_unmapped_area+0x1f5/0x3f0 [ 30.716969] do_mmap+0x854/0xf00 [ 30.717436] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.717985] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.718601] ksys_mmap_pgoff+0x3af/0x500 [ 30.719311] do_syscall_64+0x3f/0x90 [ 30.720011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.720920] RIP: 0033:0x7f1d378e0d82 [ 30.721569] 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 [ 30.724571] RSP: 002b:00007ffd56e6adb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.725868] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d378e0d82 [ 30.727075] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d36d1a000 [ 30.728344] RBP: 00007f1d36d1a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.729663] R10: 0000000000000812 R11: 0000000000000206 R12: 000055add9c1ad90 [ 30.730973] R13: 00007ffd56e6add0 R14: 00007ffd56e6ae00 R15: 00007ffd56e6b160 [ 30.732307] [ 30.732761] [ 30.733089] Allocated by task 214: [ 30.733749] kasan_save_stack+0x22/0x50 [ 30.734529] kasan_set_track+0x25/0x30 [ 30.735288] __kasan_slab_alloc+0x59/0x70 [ 30.736081] kmem_cache_alloc+0x16b/0x370 [ 30.736814] vm_area_dup+0x20/0x160 [ 30.737479] __split_vma+0x170/0x950 [ 30.738140] split_vma+0xc6/0x110 [ 30.738753] mprotect_fixup+0x8d2/0xb30 [ 30.739535] do_mprotect_pkey+0x87e/0xd40 [ 30.740276] __x64_sys_mprotect+0x78/0xc0 [ 30.741000] do_syscall_64+0x3f/0x90 [ 30.741670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.742571] [ 30.742874] Freed by task 19: [ 30.743409] kasan_save_stack+0x22/0x50 [ 30.744119] kasan_set_track+0x25/0x30 [ 30.744814] kasan_save_free_info+0x2b/0x50 [ 30.745555] __kasan_slab_free+0x10a/0x190 [ 30.746309] kmem_cache_free+0x10d/0x4d0 [ 30.747019] rcu_core+0x8c8/0x2860 [ 30.747652] __do_softirq+0x1b7/0x7d4 [ 30.748344] [ 30.748641] Last potentially related work creation: [ 30.749455] kasan_save_stack+0x22/0x50 [ 30.750170] __kasan_record_aux_stack+0x8e/0xa0 [ 30.750965] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.751852] remove_vma+0x139/0x170 [ 30.752490] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.753262] do_vmi_munmap+0x1f1/0x2b0 [ 30.753945] __vm_munmap+0x138/0x3a0 [ 30.754596] __x64_sys_munmap+0x59/0x80 [ 30.755294] do_syscall_64+0x3f/0x90 [ 30.755977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.756888] [ 30.757194] The buggy address belongs to the object at ffff88801682d658 [ 30.757194] which belongs to the cache vm_area_struct of size 168 [ 30.759318] The buggy address is located 88 bytes inside of [ 30.759318] freed 168-byte region [ffff88801682d658, ffff88801682d700) [ 30.761458] [ 30.761773] The buggy address belongs to the physical page: [ 30.762759] page:000000007fdf429e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1682d [ 30.764330] memcg:ffff8880093a6601 [ 30.764930] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.765838] page_type: 0xffffffff() [ 30.766469] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.767757] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880093a6601 [ 30.769047] page dumped because: kasan: bad access detected [ 30.769975] [ 30.770275] Memory state around the buggy address: [ 30.771097] ffff88801682d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.772305] ffff88801682d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.773512] >ffff88801682d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.774695] ^ [ 30.775511] ffff88801682d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.776723] ffff88801682d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.777918] ================================================================== [ 30.779223] Disabling lock debugging due to kernel taint [ 32.728583] BUG: Bad rss-counter state mm:0000000033f5c084 type:MM_FILEPAGES val:33 [ 32.730047] BUG: Bad rss-counter state mm:0000000033f5c084 type:MM_ANONPAGES val:22 [ 33.227330] BUG: Bad rss-counter state mm:00000000ea38ffe9 type:MM_FILEPAGES val:33 [ 33.228488] BUG: Bad rss-counter state mm:00000000ea38ffe9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4679' (ECDSA) to the list of known hosts. 2023/06/20 16:27:16 fuzzer started 2023/06/20 16:27:17 dialing manager at localhost:36067 2023/06/20 16:27:17 checking machine... 2023/06/20 16:27:17 checking revisions... [ 33.961719] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:27:17 testing simple program... [ 34.007277] cgroup: Unknown subsys name 'net' [ 34.065245] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:27:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000cc0 RCX=ffffffff812d86ea RDX=dffffc0000000000 RSI=0000000000000cc0 RDI=ffff888008fae000 RBP=ffff888018df7b18 RSP=ffff888018df7ad0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=0000000000000000 R11=0000000000000000 R12=ffff888008fae000 R13=00000000ffffffff R14=0000000000000cc0 R15=ffffffff8366a63c RIP=ffffffff818082cc 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 00007f405d78c900 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=00007f350fece2d0 CR3=0000000019b84000 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=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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f405dd43618 CR3=000000000ecbe000 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=2036313a37323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a37323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000