syzkaller login: [ 32.579243] BUG: Bad rss-counter state mm:0000000061fd174c type:MM_FILEPAGES val:33 [ 32.581346] BUG: Bad rss-counter state mm:0000000061fd174c type:MM_ANONPAGES val:22 [ 32.745543] ================================================================== [ 32.746643] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.747847] Read of size 8 at addr ffff888016b4bc20 by task sshd/221 [ 32.748820] [ 32.749082] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.750177] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.751235] Call Trace: [ 32.751578] [ 32.751880] dump_stack_lvl+0x91/0xf0 [ 32.752414] print_report+0xcc/0x620 [ 32.752932] ? __virt_addr_valid+0x102/0x340 [ 32.753524] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.754194] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.754873] kasan_report+0xbe/0xf0 [ 32.755403] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.756092] vma_interval_tree_remove+0xc75/0xec0 [ 32.756759] vma_prepare+0xc54/0x11a0 [ 32.757290] __split_vma+0x5af/0x950 [ 32.757815] ? __pfx___split_vma+0x10/0x10 [ 32.758410] ? find_held_lock+0x2c/0x110 [ 32.758986] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.759617] ? lock_is_held_type+0x9f/0x120 [ 32.760216] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.760884] ? mtree_range_walk+0x632/0x900 [ 32.761497] ? mas_walk+0x5c7/0x7c0 [ 32.762051] do_vmi_munmap+0x1f1/0x2b0 [ 32.762596] mmap_region+0x1f9/0x2660 [ 32.763134] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.763702] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.764494] ? __pfx_lock_acquire+0x10/0x10 [ 32.765086] ? __pfx_mmap_region+0x10/0x10 [ 32.765676] ? security_mmap_addr+0x7d/0xa0 [ 32.766279] ? get_unmapped_area+0x1f5/0x3f0 [ 32.766886] do_mmap+0x854/0xf00 [ 32.767368] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.767917] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.768542] ksys_mmap_pgoff+0x3af/0x500 [ 32.769101] do_syscall_64+0x3f/0x90 [ 32.769633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.770371] RIP: 0033:0x7f127dd0dd82 [ 32.770880] 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 [ 32.773235] RSP: 002b:00007ffe7b6adb18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.774248] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f127dd0dd82 [ 32.775194] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f127d147000 [ 32.776132] RBP: 00007f127d147000 R08: 0000000000000009 R09: 0000000000001000 [ 32.777072] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f231c9ec0 [ 32.778037] R13: 00007ffe7b6adb30 R14: 00007ffe7b6adb60 R15: 00007ffe7b6adec0 [ 32.778988] [ 32.779310] [ 32.779544] Allocated by task 214: [ 32.780019] kasan_save_stack+0x22/0x50 [ 32.780584] kasan_set_track+0x25/0x30 [ 32.781131] __kasan_slab_alloc+0x59/0x70 [ 32.781714] kmem_cache_alloc+0x16b/0x370 [ 32.782293] vm_area_dup+0x20/0x160 [ 32.782803] __split_vma+0x170/0x950 [ 32.783323] split_vma+0xc6/0x110 [ 32.783819] mprotect_fixup+0x8d2/0xb30 [ 32.784376] do_mprotect_pkey+0x87e/0xd40 [ 32.784954] __x64_sys_mprotect+0x78/0xc0 [ 32.785536] do_syscall_64+0x3f/0x90 [ 32.786072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.786783] [ 32.787019] Freed by task 214: [ 32.787448] kasan_save_stack+0x22/0x50 [ 32.788004] kasan_set_track+0x25/0x30 [ 32.788607] kasan_save_free_info+0x2b/0x50 [ 32.789203] __kasan_slab_free+0x10a/0x190 [ 32.789795] kmem_cache_free+0x10d/0x4d0 [ 32.790376] rcu_core+0x8c8/0x2860 [ 32.790865] __do_softirq+0x1b7/0x7d4 [ 32.791396] [ 32.791634] Last potentially related work creation: [ 32.792286] kasan_save_stack+0x22/0x50 [ 32.792843] __kasan_record_aux_stack+0x8e/0xa0 [ 32.793476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.794204] remove_vma+0x139/0x170 [ 32.794712] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.795333] do_vmi_munmap+0x1f1/0x2b0 [ 32.795875] __vm_munmap+0x138/0x3a0 [ 32.796393] __x64_sys_munmap+0x59/0x80 [ 32.796943] do_syscall_64+0x3f/0x90 [ 32.797472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.798273] [ 32.798510] Second to last potentially related work creation: [ 32.799274] kasan_save_stack+0x22/0x50 [ 32.799833] __kasan_record_aux_stack+0x8e/0xa0 [ 32.800470] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.801187] remove_vma+0x139/0x170 [ 32.801686] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.802309] do_vmi_munmap+0x1f1/0x2b0 [ 32.802850] mmap_region+0x1f9/0x2660 [ 32.803379] do_mmap+0x854/0xf00 [ 32.803856] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.804396] ksys_mmap_pgoff+0x3af/0x500 [ 32.804956] do_syscall_64+0x3f/0x90 [ 32.805485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.806206] [ 32.806443] The buggy address belongs to the object at ffff888016b4bbc8 [ 32.806443] which belongs to the cache vm_area_struct of size 168 [ 32.808082] The buggy address is located 88 bytes inside of [ 32.808082] freed 168-byte region [ffff888016b4bbc8, ffff888016b4bc70) [ 32.809633] [ 32.809875] The buggy address belongs to the physical page: [ 32.810630] page:00000000a2415cf4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b4b [ 32.811828] memcg:ffff888016b4c001 [ 32.812301] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.813017] page_type: 0xffffffff() [ 32.813520] raw: 0100000000000200 ffff8880087a0c80 ffffea00005ad1c0 0000000000000006 [ 32.814546] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b4c001 [ 32.815552] page dumped because: kasan: bad access detected [ 32.816288] [ 32.816526] Memory state around the buggy address: [ 32.817171] ffff888016b4bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.818145] ffff888016b4bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.819094] >ffff888016b4bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.820031] ^ [ 32.820617] ffff888016b4bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.821574] ffff888016b4bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.822518] ================================================================== [ 32.823546] Disabling lock debugging due to kernel taint [ 34.997279] BUG: Bad rss-counter state mm:000000004c6fb683 type:MM_FILEPAGES val:33 [ 34.998404] BUG: Bad rss-counter state mm:000000004c6fb683 type:MM_ANONPAGES val:22 [ 35.521506] BUG: Bad rss-counter state mm:0000000027d1569f type:MM_FILEPAGES val:33 [ 35.522682] BUG: Bad rss-counter state mm:0000000027d1569f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53884' (ECDSA) to the list of known hosts. 2023/06/20 16:54:43 fuzzer started 2023/06/20 16:54:43 dialing manager at localhost:36067 2023/06/20 16:54:43 checking machine... 2023/06/20 16:54:43 checking revisions... [ 36.280729] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:54:43 testing simple program... [ 36.331410] cgroup: Unknown subsys name 'net' [ 36.371527] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:54:43 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=00007ffc0edd1318 CR3=0000000018dc4000 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=2032343a34353a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a34353a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0100000000010200 RBX=0000000000000000 RCX=ffffea000059fa80 RDX=ffffea000059fa81 RSI=ffff8880167eb608 RDI=ffff888000000000 RBP=ffffffff813782f8 RSP=ffff88806cf09e08 R8 =ffffea0000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880167eb608 R13=ffff8880087b8500 R14=ffffffff813782f8 R15=ffff88800c539800 RIP=ffffffff8180c9bb 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 00007f6e0e243900 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=00007fa11b053650 CR3=000000000cb8e000 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=200693cd5fd43aa26b4ff2f123ed2a89 XMM02=000000000011c3a0d59e07bde36eea69 XMM03=000000000011c4c8ec2efd57dc4c00df XMM04=4a0fc777a0a57ad500000000000ae988 XMM05=5a0423777344b87b00000000001350d0 XMM06=c291bd5c70af25b90000000000133ec0 XMM07=fb795ef6d65770560000000000122e20 XMM08=2c67c8bc2e329bc3000000000011c4c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000