syzkaller login: [ 30.609820] BUG: Bad rss-counter state mm:00000000f6b1f22e type:MM_FILEPAGES val:33 [ 30.610837] BUG: Bad rss-counter state mm:00000000f6b1f22e type:MM_ANONPAGES val:22 [ 30.776624] ================================================================== [ 30.777613] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.778548] Read of size 8 at addr ffff88800c587c20 by task sshd/221 [ 30.779310] [ 30.779669] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.780538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.781551] Call Trace: [ 30.781894] [ 30.782174] dump_stack_lvl+0x91/0xf0 [ 30.782657] print_report+0xcc/0x620 [ 30.783145] ? __virt_addr_valid+0x102/0x340 [ 30.783684] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784309] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784924] kasan_report+0xbe/0xf0 [ 30.785632] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.786418] vma_interval_tree_remove+0xc75/0xec0 [ 30.787166] vma_prepare+0xc54/0x11a0 [ 30.787752] __split_vma+0x5af/0x950 [ 30.788330] ? __pfx___split_vma+0x10/0x10 [ 30.788982] ? find_held_lock+0x2c/0x110 [ 30.789662] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.790351] ? lock_is_held_type+0x9f/0x120 [ 30.791019] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.791757] ? mtree_range_walk+0x632/0x900 [ 30.792435] ? mas_walk+0x5c7/0x7c0 [ 30.793011] do_vmi_munmap+0x1f1/0x2b0 [ 30.793640] mmap_region+0x1f9/0x2660 [ 30.794234] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.794859] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.795740] ? __pfx_lock_acquire+0x10/0x10 [ 30.796392] ? __pfx_mmap_region+0x10/0x10 [ 30.797045] ? security_mmap_addr+0x7d/0xa0 [ 30.797714] ? get_unmapped_area+0x1f5/0x3f0 [ 30.798393] do_mmap+0x854/0xf00 [ 30.798929] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.799541] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.800230] ksys_mmap_pgoff+0x3af/0x500 [ 30.800850] do_syscall_64+0x3f/0x90 [ 30.801463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802218] RIP: 0033:0x7f0f26793d82 [ 30.802713] 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 [ 30.805094] RSP: 002b:00007ffee6247108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.806138] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f26793d82 [ 30.807094] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f25bcd000 [ 30.808050] RBP: 00007f0f25bcd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.809010] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ff9342f70 [ 30.809976] R13: 00007ffee6247120 R14: 00007ffee6247150 R15: 00007ffee62474b0 [ 30.810950] [ 30.811255] [ 30.811471] Allocated by task 214: [ 30.811899] kasan_save_stack+0x22/0x50 [ 30.812401] kasan_set_track+0x25/0x30 [ 30.812893] __kasan_slab_alloc+0x59/0x70 [ 30.813432] kmem_cache_alloc+0x16b/0x370 [ 30.813949] vm_area_dup+0x20/0x160 [ 30.814409] __split_vma+0x170/0x950 [ 30.814877] split_vma+0xc6/0x110 [ 30.815320] mprotect_fixup+0x8d2/0xb30 [ 30.815824] do_mprotect_pkey+0x87e/0xd40 [ 30.816355] __x64_sys_mprotect+0x78/0xc0 [ 30.816880] do_syscall_64+0x3f/0x90 [ 30.817369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.818019] [ 30.818237] Freed by task 19: [ 30.818622] kasan_save_stack+0x22/0x50 [ 30.819142] kasan_set_track+0x25/0x30 [ 30.819638] kasan_save_free_info+0x2b/0x50 [ 30.820170] __kasan_slab_free+0x10a/0x190 [ 30.820770] kmem_cache_free+0x10d/0x4d0 [ 30.821317] rcu_core+0x8c8/0x2860 [ 30.821769] __do_softirq+0x1b7/0x7d4 [ 30.822279] [ 30.822520] Last potentially related work creation: [ 30.823177] kasan_save_stack+0x22/0x50 [ 30.823736] __kasan_record_aux_stack+0x8e/0xa0 [ 30.824377] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.825093] remove_vma+0x139/0x170 [ 30.825609] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.826279] do_vmi_munmap+0x1f1/0x2b0 [ 30.826815] __vm_munmap+0x138/0x3a0 [ 30.827372] __x64_sys_munmap+0x59/0x80 [ 30.827934] do_syscall_64+0x3f/0x90 [ 30.828470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.829195] [ 30.829445] The buggy address belongs to the object at ffff88800c587bc8 [ 30.829445] which belongs to the cache vm_area_struct of size 168 [ 30.831096] The buggy address is located 88 bytes inside of [ 30.831096] freed 168-byte region [ffff88800c587bc8, ffff88800c587c70) [ 30.832676] [ 30.832921] The buggy address belongs to the physical page: [ 30.833683] page:00000000a2d492ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc587 [ 30.834856] memcg:ffff88800d863f01 [ 30.835317] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.836026] page_type: 0xffffffff() [ 30.836513] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.837508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d863f01 [ 30.838486] page dumped because: kasan: bad access detected [ 30.839201] [ 30.839434] Memory state around the buggy address: [ 30.840053] ffff88800c587b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.840969] ffff88800c587b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.841887] >ffff88800c587c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.842802] ^ [ 30.843374] ffff88800c587c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.844293] ffff88800c587d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.845205] ================================================================== [ 30.846246] Disabling lock debugging due to kernel taint [ 32.828731] BUG: Bad rss-counter state mm:0000000059e1d3fa type:MM_FILEPAGES val:33 [ 32.829926] BUG: Bad rss-counter state mm:0000000059e1d3fa type:MM_ANONPAGES val:22 [ 33.218393] BUG: Bad rss-counter state mm:0000000085a9ff83 type:MM_FILEPAGES val:33 [ 33.219584] BUG: Bad rss-counter state mm:0000000085a9ff83 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32235' (ECDSA) to the list of known hosts. 2023/06/19 15:07:40 fuzzer started 2023/06/19 15:07:41 dialing manager at localhost:44161 2023/06/19 15:07:41 checking machine... 2023/06/19 15:07:41 checking revisions... [ 33.986412] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:07:41 testing simple program... [ 34.042437] cgroup: Unknown subsys name 'net' [ 34.084668] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:07:40 Registers: info registers vcpu 0 RAX=ffffed1001732efd RBX=0000000000000202 RCX=ffffffff812e00e5 RDX=1ffff11001dddcc6 RSI=ffffffff81846723 RDI=ffff88800eeee608 RBP=1ffff11001732efd RSP=ffff88800b9977d8 R8 =0000000000000001 R9 =ffffed1001732f05 R10=0000000000000003 R11=00030009ff02000a R12=ffff88800eeee608 R13=ffffffff81846723 R14=ffffffff83677d2f R15=00000000000000a4 RIP=ffffffff812d8652 RFL=00000082 [--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 00007f9397f70900 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=00007f9398527618 CR3=000000000c4cc000 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=0000000000006097 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000006097 RSI=000000000000132f RDI=ffffffff864ec880 RBP=ffff8880142f7320 RSP=ffff8880142f7208 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff8880142f7328 R13=ffff8880142f7310 R14=ffff8880142f7309 R15=ffff8880142f72c8 RIP=ffffffff81130837 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 00007f1ddf72e900 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=00007f1ddec4e000 CR3=000000000984c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b36266bda14ac50900000000000ae988 XMM05=6844dad748d94f460000000000134e70 XMM06=c291bd5c70af25b90000000000133c60 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000