syzkaller login: [ 30.593197] BUG: Bad rss-counter state mm:00000000f24390da type:MM_FILEPAGES val:33 [ 30.594231] BUG: Bad rss-counter state mm:00000000f24390da type:MM_ANONPAGES val:22 [ 30.781217] ================================================================== [ 30.782494] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.783750] Read of size 8 at addr ffff888016a3a228 by task sshd/222 [ 30.784803] [ 30.785094] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.786240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.787554] Call Trace: [ 30.787982] [ 30.788363] dump_stack_lvl+0x91/0xf0 [ 30.789020] print_report+0xcc/0x620 [ 30.789666] ? __virt_addr_valid+0x102/0x340 [ 30.790430] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.791079] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.791732] kasan_report+0xbe/0xf0 [ 30.792229] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.792873] vma_interval_tree_remove+0xc75/0xec0 [ 30.793497] vma_prepare+0xc54/0x11a0 [ 30.793996] __split_vma+0x5af/0x950 [ 30.794495] ? __pfx___split_vma+0x10/0x10 [ 30.795044] ? find_held_lock+0x2c/0x110 [ 30.795593] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.796175] ? lock_is_held_type+0x9f/0x120 [ 30.796732] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.797369] ? mtree_range_walk+0x632/0x900 [ 30.797940] ? mas_walk+0x5c7/0x7c0 [ 30.798456] do_vmi_munmap+0x1f1/0x2b0 [ 30.798971] mmap_region+0x1f9/0x2660 [ 30.799468] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.800001] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.800742] ? __pfx_lock_acquire+0x10/0x10 [ 30.801293] ? __pfx_mmap_region+0x10/0x10 [ 30.801852] ? security_mmap_addr+0x7d/0xa0 [ 30.802409] ? get_unmapped_area+0x1f5/0x3f0 [ 30.802981] do_mmap+0x854/0xf00 [ 30.803438] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.803953] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.804532] ksys_mmap_pgoff+0x3af/0x500 [ 30.805073] do_syscall_64+0x3f/0x90 [ 30.805569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.806241] RIP: 0033:0x7f2a47fd8d82 [ 30.806727] 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 [ 30.808941] RSP: 002b:00007ffc861ba3a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.809881] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a47fd8d82 [ 30.810782] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a47412000 [ 30.811664] RBP: 00007f2a47412000 R08: 0000000000000009 R09: 0000000000001000 [ 30.812544] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb54e84ec0 [ 30.813426] R13: 00007ffc861ba3c0 R14: 00007ffc861ba3f0 R15: 00007ffc861ba750 [ 30.814313] [ 30.814627] [ 30.814852] Allocated by task 213: [ 30.815298] kasan_save_stack+0x22/0x50 [ 30.815825] kasan_set_track+0x25/0x30 [ 30.816337] __kasan_slab_alloc+0x59/0x70 [ 30.816881] kmem_cache_alloc+0x16b/0x370 [ 30.817415] vm_area_dup+0x20/0x160 [ 30.817887] __split_vma+0x170/0x950 [ 30.818368] split_vma+0xc6/0x110 [ 30.818848] mprotect_fixup+0x8d2/0xb30 [ 30.819367] do_mprotect_pkey+0x87e/0xd40 [ 30.819907] __x64_sys_mprotect+0x78/0xc0 [ 30.820445] do_syscall_64+0x3f/0x90 [ 30.820946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.821622] [ 30.821844] Freed by task 213: [ 30.822250] kasan_save_stack+0x22/0x50 [ 30.822784] kasan_set_track+0x25/0x30 [ 30.823301] kasan_save_free_info+0x2b/0x50 [ 30.823862] __kasan_slab_free+0x10a/0x190 [ 30.824419] kmem_cache_free+0x10d/0x4d0 [ 30.824949] rcu_core+0x8c8/0x2860 [ 30.825407] __do_softirq+0x1b7/0x7d4 [ 30.825906] [ 30.826127] Last potentially related work creation: [ 30.826761] kasan_save_stack+0x22/0x50 [ 30.827282] __kasan_record_aux_stack+0x8e/0xa0 [ 30.827886] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.828550] remove_vma+0x139/0x170 [ 30.829018] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.829601] do_vmi_munmap+0x1f1/0x2b0 [ 30.830107] __vm_munmap+0x138/0x3a0 [ 30.830603] __x64_sys_munmap+0x59/0x80 [ 30.831119] do_syscall_64+0x3f/0x90 [ 30.831612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.832281] [ 30.832510] The buggy address belongs to the object at ffff888016a3a1d0 [ 30.832510] which belongs to the cache vm_area_struct of size 168 [ 30.834051] The buggy address is located 88 bytes inside of [ 30.834051] freed 168-byte region [ffff888016a3a1d0, ffff888016a3a278) [ 30.835527] [ 30.835752] The buggy address belongs to the physical page: [ 30.836436] page:000000001445486b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a3a [ 30.837572] memcg:ffff8880165f7801 [ 30.838016] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.838706] page_type: 0xffffffff() [ 30.839176] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.840131] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165f7801 [ 30.841090] page dumped because: kasan: bad access detected [ 30.841774] [ 30.841995] Memory state around the buggy address: [ 30.842608] ffff888016a3a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.843497] ffff888016a3a180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.844388] >ffff888016a3a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.845278] ^ [ 30.845862] ffff888016a3a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.846764] ffff888016a3a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.847645] ================================================================== [ 30.848734] Disabling lock debugging due to kernel taint [ 32.854080] BUG: Bad rss-counter state mm:00000000e84ad934 type:MM_FILEPAGES val:33 [ 32.855081] BUG: Bad rss-counter state mm:00000000e84ad934 type:MM_ANONPAGES val:22 [ 33.398813] BUG: Bad rss-counter state mm:00000000f5b28785 type:MM_FILEPAGES val:33 [ 33.400226] BUG: Bad rss-counter state mm:00000000f5b28785 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19983' (ECDSA) to the list of known hosts. 2023/06/20 03:53:24 fuzzer started 2023/06/20 03:53:24 dialing manager at localhost:44161 2023/06/20 03:53:24 checking machine... 2023/06/20 03:53:24 checking revisions... [ 34.092090] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:53:24 testing simple program... [ 34.149448] cgroup: Unknown subsys name 'net' [ 34.204657] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:53:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f2e0b2fc720 CR3=000000000d6f8000 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=7c418f974bc960bea147f23955d75e60 XMM02=2c67c8bc2e329bc3000000000011cb38 XMM03=fb795ef6d65770560000000000123da8 XMM04=7e37da92173bcc9d00000000000ae988 XMM05=19e9129bd510f2350000000000133c08 XMM06=0e0d6da57e038a570000000000132a70 XMM07=e042d86d42eb936e0000000000124028 XMM08=b190f93dfac56173000000000011cb98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000004a RCX=ffffffff837264f5 RDX=ffff88800e098000 RSI=000000000000004b RDI=0000000000000082 RBP=000000000000004b RSP=ffff88800c7777b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96d30 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0388 RFL=00000293 [--S-A-C] 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 00007fc7559aa900 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=00007fc755f61618 CR3=000000000ca10000 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