syzkaller login: [ 68.805970] BUG: Bad rss-counter state mm:000000006e90f914 type:MM_FILEPAGES val:33 [ 68.807255] BUG: Bad rss-counter state mm:000000006e90f914 type:MM_ANONPAGES val:22 [ 68.981778] ================================================================== [ 68.983009] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.984228] Read of size 8 at addr ffff888016fc4b38 by task sshd/220 [ 68.985045] [ 68.985280] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 68.986384] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.987436] Call Trace: [ 68.987778] [ 68.988083] dump_stack_lvl+0x91/0xf0 [ 68.988611] print_report+0xcc/0x620 [ 68.989129] ? __virt_addr_valid+0x102/0x340 [ 68.989725] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.990380] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.991054] kasan_report+0xbe/0xf0 [ 68.991569] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.992239] vma_interval_tree_remove+0xc75/0xec0 [ 68.992905] vma_prepare+0xc54/0x11a0 [ 68.993427] __split_vma+0x5af/0x950 [ 68.993945] ? __pfx___split_vma+0x10/0x10 [ 68.994526] ? find_held_lock+0x2c/0x110 [ 68.995121] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.995746] ? lock_is_held_type+0x9f/0x120 [ 68.996345] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.997013] ? mtree_range_walk+0x632/0x900 [ 68.997617] ? mas_walk+0x5c7/0x7c0 [ 68.998138] do_vmi_munmap+0x1f1/0x2b0 [ 68.998686] mmap_region+0x1f9/0x2660 [ 68.999230] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.999797] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.000582] ? __pfx_lock_acquire+0x10/0x10 [ 69.001169] ? __pfx_mmap_region+0x10/0x10 [ 69.001754] ? security_mmap_addr+0x7d/0xa0 [ 69.002344] ? get_unmapped_area+0x1f5/0x3f0 [ 69.002967] do_mmap+0x854/0xf00 [ 69.003460] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.004006] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.004623] ksys_mmap_pgoff+0x3af/0x500 [ 69.005184] do_syscall_64+0x3f/0x90 [ 69.005711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.006425] RIP: 0033:0x7f55e8073d82 [ 69.006941] 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 [ 69.009301] RSP: 002b:00007fff554c0708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.010309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55e8073d82 [ 69.011270] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55e74ad000 [ 69.012210] RBP: 00007f55e74ad000 R08: 0000000000000009 R09: 0000000000001000 [ 69.013146] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653ba8d1ec0 [ 69.014076] R13: 00007fff554c0720 R14: 00007fff554c0750 R15: 00007fff554c0ab0 [ 69.015037] [ 69.015360] [ 69.015594] Allocated by task 213: [ 69.016073] kasan_save_stack+0x22/0x50 [ 69.016630] kasan_set_track+0x25/0x30 [ 69.017206] __kasan_slab_alloc+0x59/0x70 [ 69.017793] kmem_cache_alloc+0x16b/0x370 [ 69.018366] vm_area_dup+0x20/0x160 [ 69.018884] __split_vma+0x170/0x950 [ 69.019403] split_vma+0xc6/0x110 [ 69.019890] mprotect_fixup+0x8d2/0xb30 [ 69.020448] do_mprotect_pkey+0x87e/0xd40 [ 69.021027] __x64_sys_mprotect+0x78/0xc0 [ 69.021606] do_syscall_64+0x3f/0x90 [ 69.022135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.022868] [ 69.023106] Freed by task 210: [ 69.023541] kasan_save_stack+0x22/0x50 [ 69.024105] kasan_set_track+0x25/0x30 [ 69.024658] kasan_save_free_info+0x2b/0x50 [ 69.025227] __kasan_slab_free+0x10a/0x190 [ 69.025802] kmem_cache_free+0x10d/0x4d0 [ 69.026351] rcu_core+0x8c8/0x2860 [ 69.026834] __do_softirq+0x1b7/0x7d4 [ 69.027346] [ 69.027576] Last potentially related work creation: [ 69.028209] kasan_save_stack+0x22/0x50 [ 69.028753] __kasan_record_aux_stack+0x8e/0xa0 [ 69.029371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.030051] remove_vma+0x139/0x170 [ 69.030536] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.031152] do_vmi_munmap+0x1f1/0x2b0 [ 69.031674] __vm_munmap+0x138/0x3a0 [ 69.032184] __x64_sys_munmap+0x59/0x80 [ 69.032727] do_syscall_64+0x3f/0x90 [ 69.033216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.033848] [ 69.034079] Second to last potentially related work creation: [ 69.034812] kasan_save_stack+0x22/0x50 [ 69.035352] __kasan_record_aux_stack+0x8e/0xa0 [ 69.035970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.036655] remove_vma+0x139/0x170 [ 69.037128] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.037678] do_vmi_munmap+0x1f1/0x2b0 [ 69.038193] __vm_munmap+0x138/0x3a0 [ 69.038693] __x64_sys_munmap+0x59/0x80 [ 69.039238] do_syscall_64+0x3f/0x90 [ 69.039743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.040427] [ 69.040655] The buggy address belongs to the object at ffff888016fc4ae0 [ 69.040655] which belongs to the cache vm_area_struct of size 168 [ 69.042215] The buggy address is located 88 bytes inside of [ 69.042215] freed 168-byte region [ffff888016fc4ae0, ffff888016fc4b88) [ 69.043720] [ 69.043953] The buggy address belongs to the physical page: [ 69.044647] page:000000007092a55f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fc4 [ 69.045801] memcg:ffff888016432b01 [ 69.046251] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 69.047025] page_type: 0xffffffff() [ 69.047511] raw: 0100000000000200 ffff88800879fc80 ffffea00003616c0 dead000000000005 [ 69.048497] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016432b01 [ 69.049466] page dumped because: kasan: bad access detected [ 69.050165] [ 69.050397] Memory state around the buggy address: [ 69.051028] ffff888016fc4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.051992] ffff888016fc4a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 69.052941] >ffff888016fc4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.053845] ^ [ 69.054493] ffff888016fc4b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 69.055424] ffff888016fc4c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 69.056340] ================================================================== [ 69.057647] Disabling lock debugging due to kernel taint [ 70.962349] BUG: Bad rss-counter state mm:000000006aa68fec type:MM_FILEPAGES val:33 [ 70.963381] BUG: Bad rss-counter state mm:000000006aa68fec type:MM_ANONPAGES val:22 [ 71.479425] BUG: Bad rss-counter state mm:00000000b052dec2 type:MM_FILEPAGES val:33 [ 71.480944] BUG: Bad rss-counter state mm:00000000b052dec2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61111' (ECDSA) to the list of known hosts. 2023/06/20 03:09:17 fuzzer started 2023/06/20 03:09:17 dialing manager at localhost:44161 2023/06/20 03:09:17 checking machine... 2023/06/20 03:09:17 checking revisions... [ 72.195528] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:09:18 testing simple program... [ 72.241876] cgroup: Unknown subsys name 'net' [ 72.291736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:08:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000560b33bae8c0 RCX=0000560b33baec80 RDX=0000000000000000 RSI=0000560b31dea880 RDI=0000560b31dec177 RBP=0000560b33bae8c0 RSP=00007ffb9beaea58 R8 =0000000000000000 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000001 R12=0000560b31e0da50 R13=0000560b33baee00 R14=0000560b33baec80 R15=0000560b33baee30 RIP=0000560b31da9a20 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffb9beaf700 00000000 00000000 GS =0000 0000000000000000 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=00007f7153a66650 CR3=000000000dcc8000 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=2037313a39303a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a39303a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000800 RCX=ffffffff81b2666c RDX=ffff888008d49b40 RSI=0000000000000008 RDI=ffff888019b51740 RBP=0000000000000000 RSP=ffff888008d5f240 R8 =0000000000000004 R9 =00000000000006b8 R10=0000000000000800 R11=0000000000009293 R12=ffff888019b51740 R13=ffff888008d5f638 R14=dffffc0000000000 R15=00000000000006b8 RIP=ffffffff8180fd28 RFL=00000293 [--S-A-C] 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=00007f7153447000 CR3=0000000005482000 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=00007f903a6345100000558a3a8ea790 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