syzkaller login: [ 38.737607] BUG: Bad rss-counter state mm:00000000fe0d0dd4 type:MM_FILEPAGES val:33 [ 38.738822] BUG: Bad rss-counter state mm:00000000fe0d0dd4 type:MM_ANONPAGES val:22 [ 38.804976] ================================================================== [ 38.805892] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.806821] Read of size 8 at addr ffff88801b083b38 by task sshd/226 [ 38.807590] [ 38.807808] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.808803] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.809761] Call Trace: [ 38.810079] [ 38.810379] dump_stack_lvl+0x91/0xf0 [ 38.810876] print_report+0xcc/0x620 [ 38.811368] ? __virt_addr_valid+0x102/0x340 [ 38.811948] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.812559] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.813178] kasan_report+0xbe/0xf0 [ 38.813649] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.814273] vma_interval_tree_remove+0xc75/0xec0 [ 38.814873] vma_prepare+0xc54/0x11a0 [ 38.815351] __split_vma+0x5af/0x950 [ 38.815843] ? __pfx___split_vma+0x10/0x10 [ 38.816383] ? find_held_lock+0x2c/0x110 [ 38.816906] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.817468] ? lock_is_held_type+0x9f/0x120 [ 38.818001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.818608] ? mtree_range_walk+0x632/0x900 [ 38.819157] ? mas_walk+0x5c7/0x7c0 [ 38.819641] do_vmi_munmap+0x1f1/0x2b0 [ 38.820138] mmap_region+0x1f9/0x2660 [ 38.820616] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.821128] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.821840] ? __pfx_lock_acquire+0x10/0x10 [ 38.822372] ? __pfx_mmap_region+0x10/0x10 [ 38.822904] ? security_mmap_addr+0x7d/0xa0 [ 38.823431] ? get_unmapped_area+0x1f5/0x3f0 [ 38.823992] do_mmap+0x854/0xf00 [ 38.824433] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.824926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.825482] ksys_mmap_pgoff+0x3af/0x500 [ 38.825988] do_syscall_64+0x3f/0x90 [ 38.826466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.827117] RIP: 0033:0x7f82c88ced82 [ 38.827589] 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 [ 38.829712] RSP: 002b:00007ffd41436098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.830631] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82c88ced82 [ 38.831471] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82c7d08000 [ 38.832334] RBP: 00007f82c7d08000 R08: 0000000000000009 R09: 0000000000001000 [ 38.833180] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641fa196b20 [ 38.834020] R13: 00007ffd414360b0 R14: 00007ffd414360e0 R15: 00007ffd41436440 [ 38.834883] [ 38.835171] [ 38.835387] Allocated by task 219: [ 38.835823] kasan_save_stack+0x22/0x50 [ 38.836329] kasan_set_track+0x25/0x30 [ 38.836819] __kasan_slab_alloc+0x59/0x70 [ 38.837346] kmem_cache_alloc+0x16b/0x370 [ 38.837856] vm_area_dup+0x20/0x160 [ 38.838312] __split_vma+0x170/0x950 [ 38.838776] split_vma+0xc6/0x110 [ 38.839209] mprotect_fixup+0x8d2/0xb30 [ 38.839720] do_mprotect_pkey+0x87e/0xd40 [ 38.840238] __x64_sys_mprotect+0x78/0xc0 [ 38.840757] do_syscall_64+0x3f/0x90 [ 38.841230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.841871] [ 38.842089] Freed by task 219: [ 38.842482] kasan_save_stack+0x22/0x50 [ 38.842988] kasan_set_track+0x25/0x30 [ 38.843479] kasan_save_free_info+0x2b/0x50 [ 38.844025] __kasan_slab_free+0x10a/0x190 [ 38.844556] kmem_cache_free+0x10d/0x4d0 [ 38.845062] rcu_core+0x8c8/0x2860 [ 38.845503] __do_softirq+0x1b7/0x7d4 [ 38.845980] [ 38.846197] Last potentially related work creation: [ 38.846779] kasan_save_stack+0x22/0x50 [ 38.847299] __kasan_record_aux_stack+0x8e/0xa0 [ 38.847886] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.848538] remove_vma+0x139/0x170 [ 38.849011] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.849577] do_vmi_munmap+0x1f1/0x2b0 [ 38.850062] __vm_munmap+0x138/0x3a0 [ 38.850535] __x64_sys_munmap+0x59/0x80 [ 38.851029] do_syscall_64+0x3f/0x90 [ 38.851515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.852164] [ 38.852381] The buggy address belongs to the object at ffff88801b083ae0 [ 38.852381] which belongs to the cache vm_area_struct of size 168 [ 38.853858] The buggy address is located 88 bytes inside of [ 38.853858] freed 168-byte region [ffff88801b083ae0, ffff88801b083b88) [ 38.855264] [ 38.855479] The buggy address belongs to the physical page: [ 38.856166] page:000000003a437923 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b083 [ 38.857258] memcg:ffff88800e719a01 [ 38.857686] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.858329] page_type: 0xffffffff() [ 38.858777] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.859703] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e719a01 [ 38.860603] page dumped because: kasan: bad access detected [ 38.861259] [ 38.861473] Memory state around the buggy address: [ 38.862057] ffff88801b083a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.862903] ffff88801b083a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.863783] >ffff88801b083b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.864632] ^ [ 38.865242] ffff88801b083b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.866090] ffff88801b083c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.866934] ================================================================== [ 38.868084] Disabling lock debugging due to kernel taint [ 40.877456] BUG: Bad rss-counter state mm:00000000e7a2cb87 type:MM_FILEPAGES val:33 [ 40.878461] BUG: Bad rss-counter state mm:00000000e7a2cb87 type:MM_ANONPAGES val:22 [ 41.345796] BUG: Bad rss-counter state mm:00000000a615ae61 type:MM_FILEPAGES val:33 [ 41.346787] BUG: Bad rss-counter state mm:00000000a615ae61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59912' (ECDSA) to the list of known hosts. 2023/06/20 11:19:34 fuzzer started 2023/06/20 11:19:35 dialing manager at localhost:36067 2023/06/20 11:19:35 checking machine... 2023/06/20 11:19:35 checking revisions... [ 42.120150] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:19:35 testing simple program... [ 42.165039] cgroup: Unknown subsys name 'net' [ 42.203613] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:19:34 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800ee23680 RCX=ffff888019e80000 RDX=ffff888019e7f630 RSI=ffff88800ee23680 RDI=ffff888019e7f5e0 RBP=ffff888019e7f630 RSP=ffff888019e7f598 R8 =0000000000000001 R9 =0000000000000000 R10=ffff888019e7f630 R11=00000000000b6a61 R12=ffff888019e7f5e0 R13=ffff888019e7f658 R14=ffff888019e7f678 R15=ffff888019e7f630 RIP=ffffffff8450e1ac 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 00007f108caee700 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=00007faf05e02550 CR3=000000000dea0000 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=2034333a39313a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3533 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3533325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a39313a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880168178d8 RCX=0000000000000001 RDX=1ffff11002d02f26 RSI=ffff888016817e28 RDI=ffffffff811fc524 RBP=ffff888016817930 RSP=ffff8880168178c0 R8 =0000000000000001 R9 =ffff888016817918 R10=0000000000038001 R11=00000000000229a3 R12=ffff8880168179a0 R13=0000000000000000 R14=ffff888019b0d1c0 R15=ffff888019e53030 RIP=ffffffff811303b2 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 00007f32c0015900 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=00007f32c05cc618 CR3=00000000145c6000 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=563412feff00545000000000000080fe 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