syzkaller login: [ 30.622286] BUG: Bad rss-counter state mm:000000009e3217bd type:MM_FILEPAGES val:33 [ 30.624255] BUG: Bad rss-counter state mm:000000009e3217bd type:MM_ANONPAGES val:22 [ 30.784291] ================================================================== [ 30.785188] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.786145] Read of size 8 at addr ffff8880181a4a50 by task sshd/220 [ 30.786922] [ 30.787147] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.788148] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.789132] Call Trace: [ 30.789453] [ 30.789740] dump_stack_lvl+0x91/0xf0 [ 30.790248] print_report+0xcc/0x620 [ 30.790738] ? __virt_addr_valid+0x102/0x340 [ 30.791290] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.791906] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.792537] kasan_report+0xbe/0xf0 [ 30.793031] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.793656] vma_interval_tree_remove+0xc75/0xec0 [ 30.794261] vma_prepare+0xc54/0x11a0 [ 30.794742] __split_vma+0x5af/0x950 [ 30.795223] ? __pfx___split_vma+0x10/0x10 [ 30.795761] ? find_held_lock+0x2c/0x110 [ 30.796325] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.796902] ? lock_is_held_type+0x9f/0x120 [ 30.797448] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.798060] ? mtree_range_walk+0x632/0x900 [ 30.798620] ? mas_walk+0x5c7/0x7c0 [ 30.799103] do_vmi_munmap+0x1f1/0x2b0 [ 30.799600] mmap_region+0x1f9/0x2660 [ 30.800095] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.800632] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.801359] ? __pfx_lock_acquire+0x10/0x10 [ 30.801894] ? __pfx_mmap_region+0x10/0x10 [ 30.802431] ? security_mmap_addr+0x7d/0xa0 [ 30.802970] ? get_unmapped_area+0x1f5/0x3f0 [ 30.803528] do_mmap+0x854/0xf00 [ 30.803974] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.804502] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.805065] ksys_mmap_pgoff+0x3af/0x500 [ 30.805583] do_syscall_64+0x3f/0x90 [ 30.806070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.806722] RIP: 0033:0x7fec3ed43d82 [ 30.807184] 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 [ 30.809330] RSP: 002b:00007ffc3d876b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.810268] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec3ed43d82 [ 30.811132] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec3e17d000 [ 30.811999] RBP: 00007fec3e17d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.812872] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557707c07b20 [ 30.813723] R13: 00007ffc3d876b80 R14: 00007ffc3d876bb0 R15: 00007ffc3d876f10 [ 30.814575] [ 30.814870] [ 30.815088] Allocated by task 213: [ 30.815516] kasan_save_stack+0x22/0x50 [ 30.816015] kasan_set_track+0x25/0x30 [ 30.816524] __kasan_slab_alloc+0x59/0x70 [ 30.817048] kmem_cache_alloc+0x16b/0x370 [ 30.817568] vm_area_dup+0x20/0x160 [ 30.818024] __split_vma+0x170/0x950 [ 30.818486] split_vma+0xc6/0x110 [ 30.818922] mprotect_fixup+0x8d2/0xb30 [ 30.819426] do_mprotect_pkey+0x87e/0xd40 [ 30.819947] __x64_sys_mprotect+0x78/0xc0 [ 30.820481] do_syscall_64+0x3f/0x90 [ 30.820965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.821611] [ 30.821825] Freed by task 213: [ 30.822225] kasan_save_stack+0x22/0x50 [ 30.822739] kasan_set_track+0x25/0x30 [ 30.823235] kasan_save_free_info+0x2b/0x50 [ 30.823771] __kasan_slab_free+0x10a/0x190 [ 30.824324] kmem_cache_free+0x10d/0x4d0 [ 30.824834] rcu_core+0x8c8/0x2860 [ 30.825294] __do_softirq+0x1b7/0x7d4 [ 30.825776] [ 30.825995] Last potentially related work creation: [ 30.826582] kasan_save_stack+0x22/0x50 [ 30.827087] __kasan_record_aux_stack+0x8e/0xa0 [ 30.827655] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.828315] remove_vma+0x139/0x170 [ 30.828821] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.829389] do_vmi_munmap+0x1f1/0x2b0 [ 30.829874] __vm_munmap+0x138/0x3a0 [ 30.830335] __x64_sys_munmap+0x59/0x80 [ 30.830830] do_syscall_64+0x3f/0x90 [ 30.831311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.831953] [ 30.832177] The buggy address belongs to the object at ffff8880181a49f8 [ 30.832177] which belongs to the cache vm_area_struct of size 168 [ 30.833638] The buggy address is located 88 bytes inside of [ 30.833638] freed 168-byte region [ffff8880181a49f8, ffff8880181a4aa0) [ 30.835032] [ 30.835252] The buggy address belongs to the physical page: [ 30.835908] page:000000008971f1c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181a4 [ 30.837018] memcg:ffff88801bcca701 [ 30.837441] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.838095] page_type: 0xffffffff() [ 30.838539] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.839460] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bcca701 [ 30.840378] page dumped because: kasan: bad access detected [ 30.841040] [ 30.841256] Memory state around the buggy address: [ 30.841834] ffff8880181a4900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.842695] ffff8880181a4980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.843548] >ffff8880181a4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.844419] ^ [ 30.845125] ffff8880181a4a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.845992] ffff8880181a4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.846849] ================================================================== [ 30.847894] Disabling lock debugging due to kernel taint [ 33.540523] BUG: Bad rss-counter state mm:00000000bf01a052 type:MM_FILEPAGES val:33 [ 33.541527] BUG: Bad rss-counter state mm:00000000bf01a052 type:MM_ANONPAGES val:22 [ 34.023531] BUG: Bad rss-counter state mm:00000000ec7daea9 type:MM_FILEPAGES val:33 [ 34.024722] BUG: Bad rss-counter state mm:00000000ec7daea9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42026' (ECDSA) to the list of known hosts. 2023/06/20 21:22:53 fuzzer started 2023/06/20 21:22:53 dialing manager at localhost:36067 2023/06/20 21:22:53 checking machine... 2023/06/20 21:22:53 checking revisions... [ 34.757442] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:22:53 testing simple program... [ 34.815415] cgroup: Unknown subsys name 'net' [ 34.866814] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:22:53 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=0000000000000000 RCX=ffffffff813c0246 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806ce09e30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806ce09ff8 R12=ffff88806ce2c250 R13=ffff88806ce2b940 R14=ffff88806ce2b9c0 R15=dffffc0000000000 RIP=ffffffff8180f12f RFL=00000046 [---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 0000000000000000 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=00007ffcb9ce7c38 CR3=0000000005482000 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=00007fede957c510000055c3bda0c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110011f2e39 RBX=ffff888008f97198 RCX=1ffff110011b9e14 RDX=dffffc0000000000 RSI=ffff888008d0e620 RDI=ffff888008f971c8 RBP=ffff888008dcf070 RSP=ffff888014617bc8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888008d0e600 R13=0000000000000000 R14=ffff88800ea53178 R15=ffff88800ea53130 RIP=ffffffff8184767e RFL=00000046 [---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 00007f0c7fc39900 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=00007f0c801f0618 CR3=000000001cb0a000 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=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