syzkaller login: [ 35.634497] BUG: Bad rss-counter state mm:00000000e3a8e6e1 type:MM_FILEPAGES val:33 [ 35.635953] BUG: Bad rss-counter state mm:00000000e3a8e6e1 type:MM_ANONPAGES val:22 [ 35.797501] ================================================================== [ 35.798595] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.799741] Read of size 8 at addr ffff88800edb5228 by task sshd/218 [ 35.800848] [ 35.801108] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.802148] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.803321] Call Trace: [ 35.803707] [ 35.804080] dump_stack_lvl+0x91/0xf0 [ 35.804604] print_report+0xcc/0x620 [ 35.805096] ? __virt_addr_valid+0x102/0x340 [ 35.805662] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.806286] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.806912] kasan_report+0xbe/0xf0 [ 35.807393] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.808037] vma_interval_tree_remove+0xc75/0xec0 [ 35.808662] vma_prepare+0xc54/0x11a0 [ 35.809171] __split_vma+0x5af/0x950 [ 35.809658] ? __pfx___split_vma+0x10/0x10 [ 35.810208] ? find_held_lock+0x2c/0x110 [ 35.810749] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.811334] ? lock_is_held_type+0x9f/0x120 [ 35.811883] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.812517] ? mtree_range_walk+0x632/0x900 [ 35.813089] ? mas_walk+0x5c7/0x7c0 [ 35.813591] do_vmi_munmap+0x1f1/0x2b0 [ 35.814109] mmap_region+0x1f9/0x2660 [ 35.814613] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.815132] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.815871] ? __pfx_lock_acquire+0x10/0x10 [ 35.816435] ? __pfx_mmap_region+0x10/0x10 [ 35.816997] ? security_mmap_addr+0x7d/0xa0 [ 35.817534] ? get_unmapped_area+0x1f5/0x3f0 [ 35.818097] do_mmap+0x854/0xf00 [ 35.818561] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.819057] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.819633] ksys_mmap_pgoff+0x3af/0x500 [ 35.820172] do_syscall_64+0x3f/0x90 [ 35.820660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.821331] RIP: 0033:0x7f74f1169d82 [ 35.821809] 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 [ 35.824017] RSP: 002b:00007ffff5db53d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.824931] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74f1169d82 [ 35.825789] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74f05a3000 [ 35.826657] RBP: 00007f74f05a3000 R08: 0000000000000009 R09: 0000000000001000 [ 35.827516] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f60c343f70 [ 35.828391] R13: 00007ffff5db53f0 R14: 00007ffff5db5420 R15: 00007ffff5db5780 [ 35.829254] [ 35.829545] [ 35.829763] Allocated by task 211: [ 35.830197] kasan_save_stack+0x22/0x50 [ 35.830710] kasan_set_track+0x25/0x30 [ 35.831208] __kasan_slab_alloc+0x59/0x70 [ 35.831747] kmem_cache_alloc+0x16b/0x370 [ 35.832282] vm_area_dup+0x20/0x160 [ 35.832748] __split_vma+0x170/0x950 [ 35.833226] split_vma+0xc6/0x110 [ 35.833683] mprotect_fixup+0x8d2/0xb30 [ 35.834196] do_mprotect_pkey+0x87e/0xd40 [ 35.834720] __x64_sys_mprotect+0x78/0xc0 [ 35.835244] do_syscall_64+0x3f/0x90 [ 35.835726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.836395] [ 35.836615] Freed by task 211: [ 35.837008] kasan_save_stack+0x22/0x50 [ 35.837512] kasan_set_track+0x25/0x30 [ 35.838042] kasan_save_free_info+0x2b/0x50 [ 35.838602] __kasan_slab_free+0x10a/0x190 [ 35.839142] kmem_cache_free+0x10d/0x4d0 [ 35.839673] rcu_core+0x8c8/0x2860 [ 35.840138] __do_softirq+0x1b7/0x7d4 [ 35.840642] [ 35.840861] Last potentially related work creation: [ 35.841531] kasan_save_stack+0x22/0x50 [ 35.842042] __kasan_record_aux_stack+0x8e/0xa0 [ 35.842627] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.843272] remove_vma+0x139/0x170 [ 35.843729] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.844311] do_vmi_munmap+0x1f1/0x2b0 [ 35.844800] __vm_munmap+0x138/0x3a0 [ 35.845272] __x64_sys_munmap+0x59/0x80 [ 35.845793] do_syscall_64+0x3f/0x90 [ 35.846283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.846966] [ 35.847191] The buggy address belongs to the object at ffff88800edb51d0 [ 35.847191] which belongs to the cache vm_area_struct of size 168 [ 35.848751] The buggy address is located 88 bytes inside of [ 35.848751] freed 168-byte region [ffff88800edb51d0, ffff88800edb5278) [ 35.850188] [ 35.850408] The buggy address belongs to the physical page: [ 35.851069] page:00000000302e5692 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedb5 [ 35.852167] memcg:ffff88801a1fbc01 [ 35.852593] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.853236] page_type: 0xffffffff() [ 35.853685] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.854611] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1fbc01 [ 35.855520] page dumped because: kasan: bad access detected [ 35.856257] [ 35.856483] Memory state around the buggy address: [ 35.857071] ffff88800edb5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.857963] ffff88800edb5180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.858810] >ffff88800edb5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.859683] ^ [ 35.860278] ffff88800edb5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.861139] ffff88800edb5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.862005] ================================================================== [ 35.862956] Disabling lock debugging due to kernel taint [ 38.014708] BUG: Bad rss-counter state mm:00000000362e015a type:MM_FILEPAGES val:33 [ 38.016377] BUG: Bad rss-counter state mm:00000000362e015a type:MM_ANONPAGES val:22 [ 38.546209] BUG: Bad rss-counter state mm:0000000074fdc842 type:MM_FILEPAGES val:33 [ 38.547368] BUG: Bad rss-counter state mm:0000000074fdc842 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20407' (ECDSA) to the list of known hosts. 2023/06/21 02:27:32 fuzzer started 2023/06/21 02:27:32 dialing manager at localhost:36067 2023/06/21 02:27:32 checking machine... 2023/06/21 02:27:32 checking revisions... [ 39.200887] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:27:33 testing simple program... [ 39.250134] cgroup: Unknown subsys name 'net' [ 39.286088] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:27:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863de424 RDX=1ffff11001e5aed8 RSI=1ffff11001e5aed6 RDI=ffff88800f2d76c0 RBP=ffff88800f2d76b0 RSP=ffff88800f2d75e8 R8 =ffffffff863de428 R9 =ffff88800f2d7698 R10=0000000000038001 R11=0000000000091bda R12=ffff88800f2d76b8 R13=ffff88800f2d76a0 R14=ffff88800f2d7ce0 R15=ffff88800f2d7658 RIP=ffffffff811310f5 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 00007f3f8fd02900 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=00007f3f902b9618 CR3=0000000018282000 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=ffff888008c04400 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=00007ff42ef38570 CR3=000000000d664000 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=90a8038c17029690824ffa7f77eb1d1d XMM02=000000000011b598ec2efd57dc4c00df XMM03=00000000001223401f332041321a1599 XMM04=cbc179163569718f00000000000ae988 XMM05=751b9502027dc0b90000000000131ea8 XMM06=bdf2e299e47b49d50000000000131d30 XMM07=e042d86d42eb936e0000000000122618 XMM08=1f332041321a1599000000000011b5f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000