syzkaller login: [ 44.396990] BUG: Bad rss-counter state mm:0000000023e855bf type:MM_FILEPAGES val:33 [ 44.397718] BUG: Bad rss-counter state mm:0000000023e855bf type:MM_ANONPAGES val:22 [ 44.557968] ================================================================== [ 44.558546] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.559138] Read of size 8 at addr ffff8880100e4c20 by task sshd/219 [ 44.559612] [ 44.559749] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.560293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.561468] Call Trace: [ 44.561730] [ 44.561911] dump_stack_lvl+0x91/0xf0 [ 44.562697] print_report+0xcc/0x620 [ 44.563009] ? __virt_addr_valid+0x102/0x340 [ 44.563351] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.563781] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.564173] kasan_report+0xbe/0xf0 [ 44.564473] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.564933] vma_interval_tree_remove+0xc75/0xec0 [ 44.565314] vma_prepare+0xc54/0x11a0 [ 44.565613] __split_vma+0x5af/0x950 [ 44.565955] ? __pfx___split_vma+0x10/0x10 [ 44.566293] ? find_held_lock+0x2c/0x110 [ 44.566621] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.567029] ? lock_is_held_type+0x9f/0x120 [ 44.567363] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.567786] ? mtree_range_walk+0x632/0x900 [ 44.568136] ? mas_walk+0x5c7/0x7c0 [ 44.568430] do_vmi_munmap+0x1f1/0x2b0 [ 44.568782] mmap_region+0x1f9/0x2660 [ 44.570937] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.571872] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.573237] ? __pfx_lock_acquire+0x10/0x10 [ 44.574262] ? __pfx_mmap_region+0x10/0x10 [ 44.575277] ? security_mmap_addr+0x7d/0xa0 [ 44.576302] ? get_unmapped_area+0x1f5/0x3f0 [ 44.577371] do_mmap+0x854/0xf00 [ 44.578202] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.579154] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.580210] ksys_mmap_pgoff+0x3af/0x500 [ 44.581217] do_syscall_64+0x3f/0x90 [ 44.582140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.583375] RIP: 0033:0x7f099da98d82 [ 44.584262] 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 [ 44.589432] RSP: 002b:00007ffd0677af48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.591169] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f099da98d82 [ 44.592904] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f099ced2000 [ 44.594758] RBP: 00007f099ced2000 R08: 0000000000000009 R09: 0000000000001000 [ 44.596246] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f84e424d90 [ 44.597901] R13: 00007ffd0677af60 R14: 00007ffd0677af90 R15: 00007ffd0677b2f0 [ 44.599583] [ 44.600141] [ 44.600504] Allocated by task 212: [ 44.601365] kasan_save_stack+0x22/0x50 [ 44.602341] kasan_set_track+0x25/0x30 [ 44.603275] __kasan_slab_alloc+0x59/0x70 [ 44.604268] kmem_cache_alloc+0x16b/0x370 [ 44.605265] vm_area_dup+0x20/0x160 [ 44.606133] __split_vma+0x170/0x950 [ 44.606996] split_vma+0xc6/0x110 [ 44.607814] mprotect_fixup+0x8d2/0xb30 [ 44.608764] do_mprotect_pkey+0x87e/0xd40 [ 44.614288] __x64_sys_mprotect+0x78/0xc0 [ 44.615342] do_syscall_64+0x3f/0x90 [ 44.616227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.617439] [ 44.617849] Freed by task 212: [ 44.618522] kasan_save_stack+0x22/0x50 [ 44.619473] kasan_set_track+0x25/0x30 [ 44.620447] kasan_save_free_info+0x2b/0x50 [ 44.621512] __kasan_slab_free+0x10a/0x190 [ 44.622546] kmem_cache_free+0x10d/0x4d0 [ 44.623534] rcu_core+0x8c8/0x2860 [ 44.624403] __do_softirq+0x1b7/0x7d4 [ 44.625323] [ 44.625748] Last potentially related work creation: [ 44.626876] kasan_save_stack+0x22/0x50 [ 44.627812] __kasan_record_aux_stack+0x8e/0xa0 [ 44.628906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.630155] remove_vma+0x139/0x170 [ 44.630999] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.632036] do_vmi_munmap+0x1f1/0x2b0 [ 44.633013] __vm_munmap+0x138/0x3a0 [ 44.633870] __x64_sys_munmap+0x59/0x80 [ 44.634791] do_syscall_64+0x3f/0x90 [ 44.635622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.636950] [ 44.637328] Second to last potentially related work creation: [ 44.638838] kasan_save_stack+0x22/0x50 [ 44.639869] __kasan_record_aux_stack+0x8e/0xa0 [ 44.641052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.642359] remove_vma+0x139/0x170 [ 44.643281] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.644411] do_vmi_munmap+0x1f1/0x2b0 [ 44.645384] mmap_region+0x1f9/0x2660 [ 44.646350] do_mmap+0x854/0xf00 [ 44.647220] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.648201] ksys_mmap_pgoff+0x3af/0x500 [ 44.649223] do_syscall_64+0x3f/0x90 [ 44.650253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.651666] [ 44.652106] The buggy address belongs to the object at ffff8880100e4bc8 [ 44.652106] which belongs to the cache vm_area_struct of size 168 [ 44.655477] The buggy address is located 88 bytes inside of [ 44.655477] freed 168-byte region [ffff8880100e4bc8, ffff8880100e4c70) [ 44.658773] [ 44.659192] The buggy address belongs to the physical page: [ 44.660609] page:0000000033073392 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100e4 [ 44.663036] memcg:ffff888010059d01 [ 44.663961] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.665435] page_type: 0xffffffff() [ 44.666291] raw: 0100000000000200 ffff88800879fc80 ffffea0000403b40 dead000000000005 [ 44.668170] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010059d01 [ 44.670105] page dumped because: kasan: bad access detected [ 44.671503] [ 44.671911] Memory state around the buggy address: [ 44.673161] ffff8880100e4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.675065] ffff8880100e4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 44.676932] >ffff8880100e4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.678713] ^ [ 44.679768] ffff8880100e4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 44.681534] ffff8880100e4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 44.683258] ================================================================== [ 44.685419] Disabling lock debugging due to kernel taint [ 46.793921] BUG: Bad rss-counter state mm:00000000fa661fee type:MM_FILEPAGES val:33 [ 46.794580] BUG: Bad rss-counter state mm:00000000fa661fee type:MM_ANONPAGES val:22 [ 47.702149] BUG: Bad rss-counter state mm:0000000091656500 type:MM_FILEPAGES val:33 [ 47.702794] BUG: Bad rss-counter state mm:0000000091656500 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26431' (ECDSA) to the list of known hosts. 2023/06/20 10:17:33 fuzzer started 2023/06/20 10:17:33 dialing manager at localhost:44161 2023/06/20 10:17:33 checking machine... 2023/06/20 10:17:33 checking revisions... [ 48.757033] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:17:34 testing simple program... [ 48.813936] cgroup: Unknown subsys name 'net' [ 48.915564] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:17:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f1b258ba6f8 CR3=00000000101fc000 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=2033333a37313a3031203032206e754a XMM01=5d3439373230372e37342020205b203a XMM02=415f4d4d3a6570797420303035363536 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a37313a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0ac3014 RSI=0000000000000004 RDI=ffffffff85618098 RBP=ffffffff85618098 RSP=ffff888008d87bb0 R8 =0000000000000000 R9 =fffffbfff0ac3013 R10=ffffffff8561809b R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0ac3013 R14=0000000000000001 R15=1ffff110011b0f77 RIP=ffffffff845308c8 RFL=00000002 [-------] 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 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=00007f31a562d340 CR3=0000000009c9c000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=0000000000000000313d595449524f49 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=829eef2ac7ee571f0000000000136b28 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=89bc0f29221ece7100000000000ae988 XMM07=00000000000000000000000000000000 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000