syzkaller login: [ 31.560615] BUG: Bad rss-counter state mm:00000000bf5d457a type:MM_FILEPAGES val:33 [ 31.561407] BUG: Bad rss-counter state mm:00000000bf5d457a type:MM_ANONPAGES val:22 [ 31.593850] ================================================================== [ 31.594581] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.595322] Read of size 8 at addr ffff88801696cd08 by task sshd/220 [ 31.595888] [ 31.596049] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.596677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.597475] Call Trace: [ 31.597725] [ 31.597927] dump_stack_lvl+0x91/0xf0 [ 31.598285] print_report+0xcc/0x620 [ 31.598634] ? __virt_addr_valid+0x102/0x340 [ 31.599032] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.599474] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.599921] kasan_report+0xbe/0xf0 [ 31.600268] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.600723] vma_interval_tree_remove+0xc75/0xec0 [ 31.601149] vma_prepare+0xc54/0x11a0 [ 31.601489] __split_vma+0x5af/0x950 [ 31.601823] ? __pfx___split_vma+0x10/0x10 [ 31.602203] ? find_held_lock+0x2c/0x110 [ 31.602580] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.602987] ? lock_is_held_type+0x9f/0x120 [ 31.603379] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.603813] ? mtree_range_walk+0x632/0x900 [ 31.604204] ? mas_walk+0x5c7/0x7c0 [ 31.604545] do_vmi_munmap+0x1f1/0x2b0 [ 31.604895] mmap_region+0x1f9/0x2660 [ 31.605235] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.605590] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.606085] ? __pfx_lock_acquire+0x10/0x10 [ 31.606462] ? __pfx_mmap_region+0x10/0x10 [ 31.606844] ? security_mmap_addr+0x7d/0xa0 [ 31.607216] ? get_unmapped_area+0x1f5/0x3f0 [ 31.607600] do_mmap+0x854/0xf00 [ 31.607906] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.608253] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.608664] ksys_mmap_pgoff+0x3af/0x500 [ 31.609029] do_syscall_64+0x3f/0x90 [ 31.609367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.609823] RIP: 0033:0x7fcb0bb4ed82 [ 31.610144] 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 [ 31.611624] RSP: 002b:00007ffd4cc31c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.612256] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb0bb4ed82 [ 31.612862] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb0af88000 [ 31.613458] RBP: 00007fcb0af88000 R08: 0000000000000009 R09: 0000000000001000 [ 31.614060] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558006abfec0 [ 31.614660] R13: 00007ffd4cc31c20 R14: 00007ffd4cc31c50 R15: 00007ffd4cc31fb0 [ 31.615267] [ 31.615477] [ 31.615629] Allocated by task 213: [ 31.615928] kasan_save_stack+0x22/0x50 [ 31.616278] kasan_set_track+0x25/0x30 [ 31.616635] __kasan_slab_alloc+0x59/0x70 [ 31.617003] kmem_cache_alloc+0x16b/0x370 [ 31.617365] vm_area_dup+0x20/0x160 [ 31.617685] __split_vma+0x170/0x950 [ 31.618008] split_vma+0xc6/0x110 [ 31.618311] mprotect_fixup+0x8d2/0xb30 [ 31.618660] do_mprotect_pkey+0x87e/0xd40 [ 31.619017] __x64_sys_mprotect+0x78/0xc0 [ 31.619380] do_syscall_64+0x3f/0x90 [ 31.619714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.620162] [ 31.620313] Freed by task 210: [ 31.620591] kasan_save_stack+0x22/0x50 [ 31.620940] kasan_set_track+0x25/0x30 [ 31.621286] kasan_save_free_info+0x2b/0x50 [ 31.621657] __kasan_slab_free+0x10a/0x190 [ 31.622033] kmem_cache_free+0x10d/0x4d0 [ 31.622388] rcu_core+0x8c8/0x2860 [ 31.622697] __do_softirq+0x1b7/0x7d4 [ 31.623027] [ 31.623175] Last potentially related work creation: [ 31.623579] kasan_save_stack+0x22/0x50 [ 31.624066] __kasan_record_aux_stack+0x8e/0xa0 [ 31.624477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.624935] remove_vma+0x139/0x170 [ 31.625253] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.625647] do_vmi_munmap+0x1f1/0x2b0 [ 31.625992] __vm_munmap+0x138/0x3a0 [ 31.626327] __x64_sys_munmap+0x59/0x80 [ 31.626675] do_syscall_64+0x3f/0x90 [ 31.627006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.627461] [ 31.627609] The buggy address belongs to the object at ffff88801696ccb0 [ 31.627609] which belongs to the cache vm_area_struct of size 168 [ 31.628653] The buggy address is located 88 bytes inside of [ 31.628653] freed 168-byte region [ffff88801696ccb0, ffff88801696cd58) [ 31.629647] [ 31.629795] The buggy address belongs to the physical page: [ 31.630258] page:00000000a2b13541 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1696c [ 31.631025] memcg:ffff88800c6b9d01 [ 31.631330] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.631791] page_type: 0xffffffff() [ 31.632110] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.632760] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6b9d01 [ 31.633393] page dumped because: kasan: bad access detected [ 31.633845] [ 31.633997] Memory state around the buggy address: [ 31.634419] ffff88801696cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.635037] ffff88801696cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.635651] >ffff88801696cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.636259] ^ [ 31.636586] ffff88801696cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.637194] ffff88801696ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.637799] ================================================================== [ 31.638435] Disabling lock debugging due to kernel taint [ 33.993342] BUG: Bad rss-counter state mm:000000008fd16e4a type:MM_FILEPAGES val:33 [ 33.994430] BUG: Bad rss-counter state mm:000000008fd16e4a type:MM_ANONPAGES val:22 [ 34.430533] BUG: Bad rss-counter state mm:0000000026cd5bea type:MM_FILEPAGES val:33 [ 34.431538] BUG: Bad rss-counter state mm:0000000026cd5bea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46194' (ECDSA) to the list of known hosts. 2023/06/21 10:04:54 fuzzer started 2023/06/21 10:04:55 dialing manager at localhost:36067 2023/06/21 10:04:55 checking machine... 2023/06/21 10:04:55 checking revisions... [ 35.199463] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:04:55 testing simple program... [ 35.256921] cgroup: Unknown subsys name 'net' [ 35.322800] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:04:54 Registers: info registers vcpu 0 RAX=0000000000000010 RBX=ffffffff85dfe048 RCX=ffffffff8180c704 RDX=0000000000000000 RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe034 RSP=ffff888017ad7020 R8 =ffffffff86138eb0 R9 =ffff888017ad7118 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe044 R13=ffffffff85dfe034 R14=ffffffff85dfe034 R15=dffffc0000000000 RIP=ffffffff8112fc5d 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 00007fb48374b900 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=00007fb483d02618 CR3=0000000008ed4000 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=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=00007f4d2b67f4d0 CR3=0000000010196000 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=fb6f758bf9d4a4920749233b8cd1adaa XMM02=2c67c8bc2e329bc3000000000011e308 XMM03=fb795ef6d657705600000000001229d0 XMM04=78e1e78e9cd9e2da00000000000ae988 XMM05=19e9129bd510f23500000000001327f0 XMM06=4fda316b135da52b0000000000132678 XMM07=e042d86d42eb936e0000000000122c50 XMM08=ca932d84343c032e000000000011e368 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000