syzkaller login: [ 31.201157] BUG: Bad rss-counter state mm:0000000060ad59d4 type:MM_FILEPAGES val:33 [ 31.202165] BUG: Bad rss-counter state mm:0000000060ad59d4 type:MM_ANONPAGES val:22 [ 31.235871] ================================================================== [ 31.236877] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.237818] Read of size 8 at addr ffff88800f1eca50 by task sshd/219 [ 31.238642] [ 31.238857] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.239718] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.240701] Call Trace: [ 31.241024] [ 31.241309] dump_stack_lvl+0x91/0xf0 [ 31.241801] print_report+0xcc/0x620 [ 31.242284] ? __virt_addr_valid+0x102/0x340 [ 31.242828] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.243445] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.244077] kasan_report+0xbe/0xf0 [ 31.244553] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.245173] vma_interval_tree_remove+0xc75/0xec0 [ 31.245771] vma_prepare+0xc54/0x11a0 [ 31.246248] __split_vma+0x5af/0x950 [ 31.246722] ? __pfx___split_vma+0x10/0x10 [ 31.247253] ? find_held_lock+0x2c/0x110 [ 31.247774] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.248345] ? lock_is_held_type+0x9f/0x120 [ 31.248891] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.249502] ? mtree_range_walk+0x632/0x900 [ 31.250055] ? mas_walk+0x5c7/0x7c0 [ 31.250531] do_vmi_munmap+0x1f1/0x2b0 [ 31.251026] mmap_region+0x1f9/0x2660 [ 31.251502] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.252024] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.252748] ? __pfx_lock_acquire+0x10/0x10 [ 31.253283] ? __pfx_mmap_region+0x10/0x10 [ 31.253814] ? security_mmap_addr+0x7d/0xa0 [ 31.254344] ? get_unmapped_area+0x1f5/0x3f0 [ 31.254893] do_mmap+0x854/0xf00 [ 31.255330] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.255828] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.256414] ksys_mmap_pgoff+0x3af/0x500 [ 31.256923] do_syscall_64+0x3f/0x90 [ 31.257403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.258047] RIP: 0033:0x7fd7b5cd8d82 [ 31.258498] 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 [ 31.260629] RSP: 002b:00007ffcb133aa18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.261533] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd7b5cd8d82 [ 31.262393] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd7b5112000 [ 31.263245] RBP: 00007fd7b5112000 R08: 0000000000000009 R09: 0000000000001000 [ 31.264098] R10: 0000000000000812 R11: 0000000000000206 R12: 000055790f802ec0 [ 31.264944] R13: 00007ffcb133aa30 R14: 00007ffcb133aa60 R15: 00007ffcb133adc0 [ 31.265800] [ 31.266092] [ 31.266304] Allocated by task 212: [ 31.266740] kasan_save_stack+0x22/0x50 [ 31.267239] kasan_set_track+0x25/0x30 [ 31.267748] __kasan_slab_alloc+0x59/0x70 [ 31.268286] kmem_cache_alloc+0x16b/0x370 [ 31.268803] vm_area_dup+0x20/0x160 [ 31.269262] __split_vma+0x170/0x950 [ 31.269725] split_vma+0xc6/0x110 [ 31.270165] mprotect_fixup+0x8d2/0xb30 [ 31.270672] do_mprotect_pkey+0x87e/0xd40 [ 31.271192] __x64_sys_mprotect+0x78/0xc0 [ 31.271710] do_syscall_64+0x3f/0x90 [ 31.272197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272838] [ 31.273051] Freed by task 212: [ 31.273445] kasan_save_stack+0x22/0x50 [ 31.273948] kasan_set_track+0x25/0x30 [ 31.274440] kasan_save_free_info+0x2b/0x50 [ 31.274972] __kasan_slab_free+0x10a/0x190 [ 31.275504] kmem_cache_free+0x10d/0x4d0 [ 31.276017] rcu_core+0x8c8/0x2860 [ 31.276462] __do_softirq+0x1b7/0x7d4 [ 31.276941] [ 31.277157] Last potentially related work creation: [ 31.277736] kasan_save_stack+0x22/0x50 [ 31.278243] __kasan_record_aux_stack+0x8e/0xa0 [ 31.278821] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.279467] remove_vma+0x139/0x170 [ 31.279932] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.280491] do_vmi_munmap+0x1f1/0x2b0 [ 31.280978] __vm_munmap+0x138/0x3a0 [ 31.281442] __x64_sys_munmap+0x59/0x80 [ 31.281932] do_syscall_64+0x3f/0x90 [ 31.282406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.283046] [ 31.283259] Second to last potentially related work creation: [ 31.283947] kasan_save_stack+0x22/0x50 [ 31.284450] __kasan_record_aux_stack+0x8e/0xa0 [ 31.285025] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.285662] remove_vma+0x139/0x170 [ 31.286113] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.286675] do_vmi_munmap+0x1f1/0x2b0 [ 31.287158] mmap_region+0x1f9/0x2660 [ 31.287634] do_mmap+0x854/0xf00 [ 31.288070] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.288558] ksys_mmap_pgoff+0x3af/0x500 [ 31.289057] do_syscall_64+0x3f/0x90 [ 31.289530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290172] [ 31.290393] The buggy address belongs to the object at ffff88800f1ec9f8 [ 31.290393] which belongs to the cache vm_area_struct of size 168 [ 31.291862] The buggy address is located 88 bytes inside of [ 31.291862] freed 168-byte region [ffff88800f1ec9f8, ffff88800f1ecaa0) [ 31.293279] [ 31.293495] The buggy address belongs to the physical page: [ 31.294158] page:00000000689f94cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1ec [ 31.295235] memcg:ffff88800f29f801 [ 31.295660] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.296371] page_type: 0xffffffff() [ 31.296821] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b0000 dead000000000005 [ 31.297741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f29f801 [ 31.298648] page dumped because: kasan: bad access detected [ 31.299302] [ 31.299519] Memory state around the buggy address: [ 31.300114] ffff88800f1ec900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.300967] ffff88800f1ec980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.301819] >ffff88800f1eca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.302669] ^ [ 31.303367] ffff88800f1eca80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.304242] ffff88800f1ecb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.305093] ================================================================== [ 31.306156] Disabling lock debugging due to kernel taint [ 33.180047] BUG: Bad rss-counter state mm:000000006afe3646 type:MM_FILEPAGES val:33 [ 33.181213] BUG: Bad rss-counter state mm:000000006afe3646 type:MM_ANONPAGES val:22 [ 33.621713] BUG: Bad rss-counter state mm:00000000d8fb8bd4 type:MM_FILEPAGES val:33 [ 33.622873] BUG: Bad rss-counter state mm:00000000d8fb8bd4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63087' (ECDSA) to the list of known hosts. 2023/06/20 17:26:16 fuzzer started 2023/06/20 17:26:17 dialing manager at localhost:36067 2023/06/20 17:26:17 checking machine... 2023/06/20 17:26:17 checking revisions... [ 34.255802] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:26:17 testing simple program... [ 34.315493] cgroup: Unknown subsys name 'net' [ 34.353821] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:26:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8118ddc3 RCX=0000000000000001 RDX=1ffff1100d9c1359 RSI=ffff88806ce09fb8 RDI=ffffffff8118ddc3 RBP=ffffffff8118ddc3 RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b5d59 R12=0000000000000001 R13=0000000000000000 R14=ffff888016cb1b40 R15=ffff88801a271a10 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f0a60302900 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=00007f0a608b9618 CR3=000000000c67e000 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=00007fca5ddf6020 CR3=000000000ca5e000 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=cc6cd204d33e029c1649445701ce4426 XMM02=ec2efd57dc4c00df000000000011afc0 XMM03=a84110f42b94bbc0000000000011b090 XMM04=e1910d78aaef003900000000000ae988 XMM05=dfcdbad4f1609c370000000000132bd8 XMM06=e66b0ebef4c00f130000000000131a40 XMM07=e042d86d42eb936e0000000000121c88 XMM08=a84110f42b94bbc0000000000011b090 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000