syzkaller login: [ 36.616235] BUG: Bad rss-counter state mm:0000000034288a12 type:MM_FILEPAGES val:33 [ 36.617651] BUG: Bad rss-counter state mm:0000000034288a12 type:MM_ANONPAGES val:22 [ 36.770608] ================================================================== [ 36.771508] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.772438] Read of size 8 at addr ffff88800d8c73f8 by task sshd/220 [ 36.773207] [ 36.773428] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.774359] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.775335] Call Trace: [ 36.775651] [ 36.775935] dump_stack_lvl+0x91/0xf0 [ 36.776422] print_report+0xcc/0x620 [ 36.776903] ? __virt_addr_valid+0x102/0x340 [ 36.777456] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.778072] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.778709] kasan_report+0xbe/0xf0 [ 36.779186] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.779803] vma_interval_tree_remove+0xc75/0xec0 [ 36.780411] vma_prepare+0xc54/0x11a0 [ 36.780890] __split_vma+0x5af/0x950 [ 36.781358] ? __pfx___split_vma+0x10/0x10 [ 36.781889] ? find_held_lock+0x2c/0x110 [ 36.782420] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.782982] ? lock_is_held_type+0x9f/0x120 [ 36.783523] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.784134] ? mtree_range_walk+0x632/0x900 [ 36.784687] ? mas_walk+0x5c7/0x7c0 [ 36.785161] do_vmi_munmap+0x1f1/0x2b0 [ 36.785650] mmap_region+0x1f9/0x2660 [ 36.786131] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.786664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.787378] ? __pfx_lock_acquire+0x10/0x10 [ 36.787912] ? __pfx_mmap_region+0x10/0x10 [ 36.788444] ? security_mmap_addr+0x7d/0xa0 [ 36.788979] ? get_unmapped_area+0x1f5/0x3f0 [ 36.789525] do_mmap+0x854/0xf00 [ 36.789963] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.790467] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.791037] ksys_mmap_pgoff+0x3af/0x500 [ 36.791545] do_syscall_64+0x3f/0x90 [ 36.792026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.792674] RIP: 0033:0x7f15c85b9d82 [ 36.793131] 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 [ 36.795265] RSP: 002b:00007ffd9b1ed528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.796175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15c85b9d82 [ 36.797028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15c79f3000 [ 36.797873] RBP: 00007f15c79f3000 R08: 0000000000000009 R09: 0000000000001000 [ 36.798734] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558309a2aec0 [ 36.799584] R13: 00007ffd9b1ed540 R14: 00007ffd9b1ed570 R15: 00007ffd9b1ed8d0 [ 36.800443] [ 36.800733] [ 36.800950] Allocated by task 213: [ 36.801381] kasan_save_stack+0x22/0x50 [ 36.801889] kasan_set_track+0x25/0x30 [ 36.802390] __kasan_slab_alloc+0x59/0x70 [ 36.802912] kmem_cache_alloc+0x16b/0x370 [ 36.803428] vm_area_dup+0x20/0x160 [ 36.803884] __split_vma+0x170/0x950 [ 36.804355] split_vma+0xc6/0x110 [ 36.804798] mprotect_fixup+0x8d2/0xb30 [ 36.805299] do_mprotect_pkey+0x87e/0xd40 [ 36.805819] __x64_sys_mprotect+0x78/0xc0 [ 36.806355] do_syscall_64+0x3f/0x90 [ 36.806828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.807468] [ 36.807685] Freed by task 213: [ 36.808081] kasan_save_stack+0x22/0x50 [ 36.808586] kasan_set_track+0x25/0x30 [ 36.809077] kasan_save_free_info+0x2b/0x50 [ 36.809615] __kasan_slab_free+0x10a/0x190 [ 36.810160] kmem_cache_free+0x10d/0x4d0 [ 36.810670] rcu_core+0x8c8/0x2860 [ 36.811121] __do_softirq+0x1b7/0x7d4 [ 36.811600] [ 36.811813] Last potentially related work creation: [ 36.812402] kasan_save_stack+0x22/0x50 [ 36.812904] __kasan_record_aux_stack+0x8e/0xa0 [ 36.813482] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.814135] remove_vma+0x139/0x170 [ 36.814604] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.815173] do_vmi_munmap+0x1f1/0x2b0 [ 36.815662] __vm_munmap+0x138/0x3a0 [ 36.816135] __x64_sys_munmap+0x59/0x80 [ 36.816634] do_syscall_64+0x3f/0x90 [ 36.817112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.817754] [ 36.817972] The buggy address belongs to the object at ffff88800d8c73a0 [ 36.817972] which belongs to the cache vm_area_struct of size 168 [ 36.819456] The buggy address is located 88 bytes inside of [ 36.819456] freed 168-byte region [ffff88800d8c73a0, ffff88800d8c7448) [ 36.820865] [ 36.821082] The buggy address belongs to the physical page: [ 36.821739] page:000000001d79b821 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8c7 [ 36.822836] memcg:ffff88800e275a01 [ 36.823265] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.823915] page_type: 0xffffffff() [ 36.824365] raw: 0100000000000200 ffff88800879fc80 ffffea000037e1c0 dead000000000006 [ 36.825286] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e275a01 [ 36.826214] page dumped because: kasan: bad access detected [ 36.826884] [ 36.827102] Memory state around the buggy address: [ 36.827689] ffff88800d8c7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.828545] ffff88800d8c7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.829409] >ffff88800d8c7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.830275] ^ [ 36.831128] ffff88800d8c7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.831996] ffff88800d8c7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.832861] ================================================================== [ 36.833835] Disabling lock debugging due to kernel taint [ 38.804893] BUG: Bad rss-counter state mm:00000000bda9f1cf type:MM_FILEPAGES val:33 [ 38.805927] BUG: Bad rss-counter state mm:00000000bda9f1cf type:MM_ANONPAGES val:22 [ 39.286226] BUG: Bad rss-counter state mm:000000005d9226a7 type:MM_FILEPAGES val:33 [ 39.287248] BUG: Bad rss-counter state mm:000000005d9226a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10772' (ECDSA) to the list of known hosts. 2023/06/19 21:07:11 fuzzer started 2023/06/19 21:07:12 dialing manager at localhost:44161 2023/06/19 21:07:12 checking machine... 2023/06/19 21:07:12 checking revisions... [ 39.986831] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:07:12 testing simple program... [ 40.025914] cgroup: Unknown subsys name 'net' [ 40.065915] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:07:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880142875b0 RCX=0000000000000001 RDX=1ffff11002850ed0 RSI=ffffffff84506c7f RDI=ffff8880142875bc RBP=ffff888014287680 RSP=ffff8880142874c8 R8 =0000000000000001 R9 =ffff888014287528 R10=0000000000038001 R11=000000000008abed R12=ffff8880142875b0 R13=0000000000000000 R14=ffff8880102ad1c0 R15=1ffff11002850f1d RIP=ffffffff813ad4f9 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 00007f0a7fc4c900 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=00007ffb7c161650 CR3=000000000cc10000 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=a2b437b925526395c5424a2e6b797953 XMM02=000000000011f978eff9b2d0a8fce9cb XMM03=000000000011fa482c67c8bc2e329bc3 XMM04=cab5fc36fb7b684400000000000ae988 XMM05=ae02de7302ff39260000000000134d60 XMM06=4fda316b135da52b0000000000133b50 XMM07=fb795ef6d657705600000000001240b0 XMM08=2c67c8bc2e329bc3000000000011f9e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135a RSI=ffffffff81808308 RDI=ffff88806cf09b40 RBP=ffff88806cf09b10 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000021edf R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff88800ef251c0 R15=ffff88800d2ac280 RIP=ffffffff813ad42f 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffb7bbac900 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=00007ffb7c163618 CR3=0000000009a98000 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=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