syzkaller login: [ 30.596117] BUG: Bad rss-counter state mm:00000000ae077efa type:MM_FILEPAGES val:33 [ 30.597153] BUG: Bad rss-counter state mm:00000000ae077efa type:MM_ANONPAGES val:22 [ 30.769128] ================================================================== [ 30.770036] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.770980] Read of size 8 at addr ffff88800ec2b3f8 by task sshd/221 [ 30.771759] [ 30.771979] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.772974] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.773950] Call Trace: [ 30.774272] [ 30.774692] dump_stack_lvl+0x91/0xf0 [ 30.775286] print_report+0xcc/0x620 [ 30.775875] ? __virt_addr_valid+0x102/0x340 [ 30.776529] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777261] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777991] kasan_report+0xbe/0xf0 [ 30.778562] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779305] vma_interval_tree_remove+0xc75/0xec0 [ 30.780052] vma_prepare+0xc54/0x11a0 [ 30.780634] __split_vma+0x5af/0x950 [ 30.781210] ? __pfx___split_vma+0x10/0x10 [ 30.781855] ? find_held_lock+0x2c/0x110 [ 30.782482] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.783158] ? lock_is_held_type+0x9f/0x120 [ 30.783847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.784485] ? mtree_range_walk+0x632/0x900 [ 30.785040] ? mas_walk+0x5c7/0x7c0 [ 30.785526] do_vmi_munmap+0x1f1/0x2b0 [ 30.786028] mmap_region+0x1f9/0x2660 [ 30.786510] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.787016] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.787740] ? __pfx_lock_acquire+0x10/0x10 [ 30.788275] ? __pfx_mmap_region+0x10/0x10 [ 30.788806] ? security_mmap_addr+0x7d/0xa0 [ 30.789336] ? get_unmapped_area+0x1f5/0x3f0 [ 30.789891] do_mmap+0x854/0xf00 [ 30.790337] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.790831] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.791395] ksys_mmap_pgoff+0x3af/0x500 [ 30.791921] do_syscall_64+0x3f/0x90 [ 30.792402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.793063] RIP: 0033:0x7f9c47986d82 [ 30.793525] 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 [ 30.795678] RSP: 002b:00007ffc1e4e1268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.796608] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c47986d82 [ 30.797483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c46dc0000 [ 30.798343] RBP: 00007f9c46dc0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.799201] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed73a67ec0 [ 30.800081] R13: 00007ffc1e4e1280 R14: 00007ffc1e4e12b0 R15: 00007ffc1e4e1610 [ 30.800954] [ 30.801253] [ 30.801470] Allocated by task 214: [ 30.801901] kasan_save_stack+0x22/0x50 [ 30.802415] kasan_set_track+0x25/0x30 [ 30.802912] __kasan_slab_alloc+0x59/0x70 [ 30.803454] kmem_cache_alloc+0x16b/0x370 [ 30.803996] vm_area_dup+0x20/0x160 [ 30.804452] __split_vma+0x170/0x950 [ 30.804917] split_vma+0xc6/0x110 [ 30.805365] mprotect_fixup+0x8d2/0xb30 [ 30.805876] do_mprotect_pkey+0x87e/0xd40 [ 30.806400] __x64_sys_mprotect+0x78/0xc0 [ 30.806935] do_syscall_64+0x3f/0x90 [ 30.807410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808070] [ 30.808293] Freed by task 214: [ 30.808691] kasan_save_stack+0x22/0x50 [ 30.809198] kasan_set_track+0x25/0x30 [ 30.809701] kasan_save_free_info+0x2b/0x50 [ 30.810254] __kasan_slab_free+0x10a/0x190 [ 30.810787] kmem_cache_free+0x10d/0x4d0 [ 30.811312] rcu_core+0x8c8/0x2860 [ 30.811776] __do_softirq+0x1b7/0x7d4 [ 30.812260] [ 30.812480] Last potentially related work creation: [ 30.813092] kasan_save_stack+0x22/0x50 [ 30.813597] __kasan_record_aux_stack+0x8e/0xa0 [ 30.814173] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.814815] remove_vma+0x139/0x170 [ 30.815265] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.815834] do_vmi_munmap+0x1f1/0x2b0 [ 30.816323] __vm_munmap+0x138/0x3a0 [ 30.816802] __x64_sys_munmap+0x59/0x80 [ 30.817303] do_syscall_64+0x3f/0x90 [ 30.817783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.818434] [ 30.818648] The buggy address belongs to the object at ffff88800ec2b3a0 [ 30.818648] which belongs to the cache vm_area_struct of size 168 [ 30.820169] The buggy address is located 88 bytes inside of [ 30.820169] freed 168-byte region [ffff88800ec2b3a0, ffff88800ec2b448) [ 30.821589] [ 30.821804] The buggy address belongs to the physical page: [ 30.822466] page:00000000818cd940 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec2b [ 30.823564] memcg:ffff88800eeacc01 [ 30.824013] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.824669] page_type: 0xffffffff() [ 30.825132] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.826065] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeacc01 [ 30.826981] page dumped because: kasan: bad access detected [ 30.827650] [ 30.827880] Memory state around the buggy address: [ 30.828467] ffff88800ec2b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.829321] ffff88800ec2b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.830177] >ffff88800ec2b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.831028] ^ [ 30.831888] ffff88800ec2b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.832744] ffff88800ec2b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.833603] ================================================================== [ 30.834693] Disabling lock debugging due to kernel taint [ 32.768742] BUG: Bad rss-counter state mm:000000003e55bece type:MM_FILEPAGES val:33 [ 32.769617] BUG: Bad rss-counter state mm:000000003e55bece type:MM_ANONPAGES val:22 [ 33.249582] BUG: Bad rss-counter state mm:0000000017d56109 type:MM_FILEPAGES val:33 [ 33.250607] BUG: Bad rss-counter state mm:0000000017d56109 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24368' (ECDSA) to the list of known hosts. 2023/06/21 05:35:23 fuzzer started 2023/06/21 05:35:23 dialing manager at localhost:36067 2023/06/21 05:35:24 checking machine... 2023/06/21 05:35:24 checking revisions... [ 33.975714] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:35:24 testing simple program... [ 34.025880] cgroup: Unknown subsys name 'net' [ 34.100637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:35:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f362187e100 CR3=000000000d66c000 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=04b10d4afbfb9ea4cb4b2c13a5d1b81f XMM02=000000000011a0b8d59e07bde36eea69 XMM03=000000000011a1e0ec2efd57dc4c00df XMM04=a9fb96c047d4408c00000000000ae988 XMM05=c86561a18dc0002f0000000000132670 XMM06=0db1346c97e7b4550000000000131410 XMM07=fb795ef6d65770560000000000121648 XMM08=2c67c8bc2e329bc3000000000011a1e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff1100d9e135e RDX=dffffc0000000000 RSI=ffffffff8450cc7f RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff863b3c2a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008aa85 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130706 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 00007fd567829900 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=00007fd567de0618 CR3=000000000da96000 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