syzkaller login: [ 31.520272] BUG: Bad rss-counter state mm:0000000068cc715b type:MM_FILEPAGES val:33 [ 31.521820] BUG: Bad rss-counter state mm:0000000068cc715b type:MM_ANONPAGES val:22 [ 31.670422] ================================================================== [ 31.671348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.672278] Read of size 8 at addr ffff888019cd2968 by task sshd/219 [ 31.673046] [ 31.673277] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.674298] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.675300] Call Trace: [ 31.675620] [ 31.675903] dump_stack_lvl+0x91/0xf0 [ 31.676407] print_report+0xcc/0x620 [ 31.676893] ? __virt_addr_valid+0x102/0x340 [ 31.677449] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.678083] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.678700] kasan_report+0xbe/0xf0 [ 31.679175] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.679791] vma_interval_tree_remove+0xc75/0xec0 [ 31.680386] vma_prepare+0xc54/0x11a0 [ 31.680863] __split_vma+0x5af/0x950 [ 31.681348] ? __pfx___split_vma+0x10/0x10 [ 31.681877] ? find_held_lock+0x2c/0x110 [ 31.682393] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.682957] ? lock_is_held_type+0x9f/0x120 [ 31.683487] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.684098] ? mtree_range_walk+0x632/0x900 [ 31.684645] ? mas_walk+0x5c7/0x7c0 [ 31.685121] do_vmi_munmap+0x1f1/0x2b0 [ 31.685637] mmap_region+0x1f9/0x2660 [ 31.686115] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.686626] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.687339] ? __pfx_lock_acquire+0x10/0x10 [ 31.687870] ? __pfx_mmap_region+0x10/0x10 [ 31.688401] ? security_mmap_addr+0x7d/0xa0 [ 31.688933] ? get_unmapped_area+0x1f5/0x3f0 [ 31.689491] do_mmap+0x854/0xf00 [ 31.689930] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.690423] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.690980] ksys_mmap_pgoff+0x3af/0x500 [ 31.691491] do_syscall_64+0x3f/0x90 [ 31.691967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.692610] RIP: 0033:0x7f840b34bd82 [ 31.693063] 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 [ 31.695189] RSP: 002b:00007ffe64f62078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.696098] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f840b34bd82 [ 31.696943] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f840a785000 [ 31.697799] RBP: 00007f840a785000 R08: 0000000000000009 R09: 0000000000001000 [ 31.698662] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e7c9c3aec0 [ 31.699525] R13: 00007ffe64f62090 R14: 00007ffe64f620c0 R15: 00007ffe64f62420 [ 31.700383] [ 31.700680] [ 31.700892] Allocated by task 212: [ 31.701325] kasan_save_stack+0x22/0x50 [ 31.701831] kasan_set_track+0x25/0x30 [ 31.702320] __kasan_slab_alloc+0x59/0x70 [ 31.702843] kmem_cache_alloc+0x16b/0x370 [ 31.703353] vm_area_dup+0x20/0x160 [ 31.703810] __split_vma+0x170/0x950 [ 31.704287] split_vma+0xc6/0x110 [ 31.704725] mprotect_fixup+0x8d2/0xb30 [ 31.705233] do_mprotect_pkey+0x87e/0xd40 [ 31.705752] __x64_sys_mprotect+0x78/0xc0 [ 31.706280] do_syscall_64+0x3f/0x90 [ 31.706759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.707505] [ 31.707719] Freed by task 202: [ 31.708114] kasan_save_stack+0x22/0x50 [ 31.708621] kasan_set_track+0x25/0x30 [ 31.709114] kasan_save_free_info+0x2b/0x50 [ 31.709667] __kasan_slab_free+0x10a/0x190 [ 31.710197] kmem_cache_free+0x10d/0x4d0 [ 31.710705] rcu_core+0x8c8/0x2860 [ 31.711146] __do_softirq+0x1b7/0x7d4 [ 31.711622] [ 31.711835] Last potentially related work creation: [ 31.712412] kasan_save_stack+0x22/0x50 [ 31.712917] __kasan_record_aux_stack+0x8e/0xa0 [ 31.713500] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.714143] remove_vma+0x139/0x170 [ 31.714588] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.715144] do_vmi_munmap+0x1f1/0x2b0 [ 31.715701] __vm_munmap+0x138/0x3a0 [ 31.716169] __x64_sys_munmap+0x59/0x80 [ 31.716662] do_syscall_64+0x3f/0x90 [ 31.717164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.717811] [ 31.718024] The buggy address belongs to the object at ffff888019cd2910 [ 31.718024] which belongs to the cache vm_area_struct of size 168 [ 31.719519] The buggy address is located 88 bytes inside of [ 31.719519] freed 168-byte region [ffff888019cd2910, ffff888019cd29b8) [ 31.720915] [ 31.721133] The buggy address belongs to the physical page: [ 31.721819] page:0000000005c78425 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cd2 [ 31.722906] memcg:ffff88800ff02c01 [ 31.723326] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.723974] page_type: 0xffffffff() [ 31.724427] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.725353] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff02c01 [ 31.726248] page dumped because: kasan: bad access detected [ 31.726909] [ 31.727161] Memory state around the buggy address: [ 31.727742] ffff888019cd2800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.728586] ffff888019cd2880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.729475] >ffff888019cd2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.730314] ^ [ 31.731097] ffff888019cd2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.731954] ffff888019cd2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.732803] ================================================================== [ 31.733740] Disabling lock debugging due to kernel taint [ 33.712315] BUG: Bad rss-counter state mm:00000000c589308e type:MM_FILEPAGES val:33 [ 33.713361] BUG: Bad rss-counter state mm:00000000c589308e type:MM_ANONPAGES val:22 [ 34.300356] BUG: Bad rss-counter state mm:0000000067835484 type:MM_FILEPAGES val:33 [ 34.301570] BUG: Bad rss-counter state mm:0000000067835484 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53043' (ECDSA) to the list of known hosts. 2023/06/20 20:20:39 fuzzer started 2023/06/20 20:20:39 dialing manager at localhost:36067 2023/06/20 20:20:39 checking machine... 2023/06/20 20:20:39 checking revisions... [ 34.934601] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:20:39 testing simple program... [ 34.986934] cgroup: Unknown subsys name 'net' [ 35.033617] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:20:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=ffff888016309b40 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11003931e84 RSP=ffff88801c98f408 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=00000000000000a4 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007f22bbc43900 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=00007f22bc1fa618 CR3=000000001a3e0000 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=dffffc0000000000 RBX=00000000000361a0 RCX=1ffff1100d9e6c39 RDX=dffffc0000000000 RSI=ffff88807ffdc000 RDI=ffffffff81839900 RBP=ffff88800da16b00 RSP=ffff88806cf09db8 R8 =ffff88806cf361a0 R9 =ffffffff87b6a200 R10=ffff88806cf361e8 R11=0000000000000000 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000fffffd78 R15=0000000000000000 RIP=ffffffff81839af4 RFL=00000002 [-------] 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 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=00007f3a6491d900 CR3=000000000f0de000 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=58a43fdd2dbf66980c4c79ab565438c8 XMM02=ec2efd57dc4c00df000000000011b328 XMM03=08c99c5949e78ea8000000000011b3f8 XMM04=c3c424a6118dd60000000000000ae988 XMM05=dfcdbad4f1609c370000000000132618 XMM06=51d66609cd7d94b10000000000131480 XMM07=e042d86d42eb936e0000000000122a18 XMM08=08c99c5949e78ea8000000000011b3f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000