syzkaller login: [ 36.871615] BUG: Bad rss-counter state mm:000000008b1abf6e type:MM_FILEPAGES val:33 [ 36.872628] BUG: Bad rss-counter state mm:000000008b1abf6e type:MM_ANONPAGES val:22 [ 37.040924] ================================================================== [ 37.041892] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.042890] Read of size 8 at addr ffff888019f05058 by task sshd/220 [ 37.043808] [ 37.044045] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.044962] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.046047] Call Trace: [ 37.046389] [ 37.046693] dump_stack_lvl+0x91/0xf0 [ 37.047242] print_report+0xcc/0x620 [ 37.047757] ? __virt_addr_valid+0x102/0x340 [ 37.048350] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.049009] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.049672] kasan_report+0xbe/0xf0 [ 37.050178] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.050835] vma_interval_tree_remove+0xc75/0xec0 [ 37.051490] vma_prepare+0xc54/0x11a0 [ 37.052001] __split_vma+0x5af/0x950 [ 37.052501] ? __pfx___split_vma+0x10/0x10 [ 37.053060] ? find_held_lock+0x2c/0x110 [ 37.053625] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.054236] ? lock_is_held_type+0x9f/0x120 [ 37.054814] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.055485] ? mtree_range_walk+0x632/0x900 [ 37.056075] ? mas_walk+0x5c7/0x7c0 [ 37.056581] do_vmi_munmap+0x1f1/0x2b0 [ 37.057108] mmap_region+0x1f9/0x2660 [ 37.057623] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.058173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.058943] ? __pfx_lock_acquire+0x10/0x10 [ 37.059515] ? __pfx_mmap_region+0x10/0x10 [ 37.060083] ? security_mmap_addr+0x7d/0xa0 [ 37.060669] ? get_unmapped_area+0x1f5/0x3f0 [ 37.061261] do_mmap+0x854/0xf00 [ 37.061731] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.062258] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.062864] ksys_mmap_pgoff+0x3af/0x500 [ 37.063432] do_syscall_64+0x3f/0x90 [ 37.063952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.064645] RIP: 0033:0x7fb5249f6d82 [ 37.065133] 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 [ 37.067382] RSP: 002b:00007ffd25c9bee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.068341] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb5249f6d82 [ 37.069258] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb523e30000 [ 37.070195] RBP: 00007fb523e30000 R08: 0000000000000009 R09: 0000000000001000 [ 37.071105] R10: 0000000000000812 R11: 0000000000000206 R12: 000055891aadcec0 [ 37.072018] R13: 00007ffd25c9bf00 R14: 00007ffd25c9bf30 R15: 00007ffd25c9c290 [ 37.072936] [ 37.073249] [ 37.073478] Allocated by task 213: [ 37.073936] kasan_save_stack+0x22/0x50 [ 37.074475] kasan_set_track+0x25/0x30 [ 37.075038] __kasan_slab_alloc+0x59/0x70 [ 37.075607] kmem_cache_alloc+0x16b/0x370 [ 37.076161] vm_area_dup+0x20/0x160 [ 37.076656] __split_vma+0x170/0x950 [ 37.077165] split_vma+0xc6/0x110 [ 37.077639] mprotect_fixup+0x8d2/0xb30 [ 37.078174] do_mprotect_pkey+0x87e/0xd40 [ 37.078730] __x64_sys_mprotect+0x78/0xc0 [ 37.079292] do_syscall_64+0x3f/0x90 [ 37.079798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.080485] [ 37.080715] Freed by task 213: [ 37.081128] kasan_save_stack+0x22/0x50 [ 37.081663] kasan_set_track+0x25/0x30 [ 37.082181] kasan_save_free_info+0x2b/0x50 [ 37.082740] __kasan_slab_free+0x10a/0x190 [ 37.083314] kmem_cache_free+0x10d/0x4d0 [ 37.083860] rcu_core+0x8c8/0x2860 [ 37.084328] __do_softirq+0x1b7/0x7d4 [ 37.084830] [ 37.085057] Last potentially related work creation: [ 37.085678] kasan_save_stack+0x22/0x50 [ 37.086215] __kasan_record_aux_stack+0x8e/0xa0 [ 37.086826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.087536] remove_vma+0x139/0x170 [ 37.088019] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.088608] do_vmi_munmap+0x1f1/0x2b0 [ 37.089133] __vm_munmap+0x138/0x3a0 [ 37.089640] __x64_sys_munmap+0x59/0x80 [ 37.090169] do_syscall_64+0x3f/0x90 [ 37.090675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.091369] [ 37.091599] The buggy address belongs to the object at ffff888019f05000 [ 37.091599] which belongs to the cache vm_area_struct of size 168 [ 37.093166] The buggy address is located 88 bytes inside of [ 37.093166] freed 168-byte region [ffff888019f05000, ffff888019f050a8) [ 37.094676] [ 37.094930] The buggy address belongs to the physical page: [ 37.095647] page:00000000a233c4a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f05 [ 37.096817] memcg:ffff888019dd1801 [ 37.097273] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.098020] page_type: 0xffffffff() [ 37.098501] raw: 0100000000000200 ffff88800879fc80 ffffea000040ac00 000000000000000d [ 37.099495] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dd1801 [ 37.100459] page dumped because: kasan: bad access detected [ 37.101167] [ 37.101398] Memory state around the buggy address: [ 37.102035] ffff888019f04f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 37.102996] ffff888019f04f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.103919] >ffff888019f05000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.104837] ^ [ 37.105617] ffff888019f05080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 37.106548] ffff888019f05100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.107489] ================================================================== [ 37.108597] Disabling lock debugging due to kernel taint [ 39.104094] BUG: Bad rss-counter state mm:0000000045768f0c type:MM_FILEPAGES val:33 [ 39.104943] BUG: Bad rss-counter state mm:0000000045768f0c type:MM_ANONPAGES val:22 [ 39.549929] BUG: Bad rss-counter state mm:000000005e341a4d type:MM_FILEPAGES val:33 [ 39.550873] BUG: Bad rss-counter state mm:000000005e341a4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59416' (ECDSA) to the list of known hosts. 2023/06/19 21:45:11 fuzzer started 2023/06/19 21:45:11 dialing manager at localhost:44161 2023/06/19 21:45:11 checking machine... 2023/06/19 21:45:11 checking revisions... [ 40.322486] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:45:11 testing simple program... [ 40.378564] cgroup: Unknown subsys name 'net' [ 40.431844] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:45:05 Registers: info registers vcpu 0 RAX=ffffffff81808268 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888010397601 RSI=ffff8880103976b8 RDI=ffff8880103976b8 RBP=ffff888010397390 RSP=ffff8880103972c8 R8 =ffffffff8613773a R9 =ffff888010397378 R10=0000000000038001 R11=0000000000020de7 R12=ffff888010397398 R13=ffff888010397380 R14=ffff8880103976c0 R15=ffff888010397338 RIP=ffffffff81131041 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 00007f6b1dcc9900 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=00007f6b1d1274c0 CR3=000000000dd1a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=4d4d15f5cbb9144100000000000ae988 XMM05=4a4930989f665eba0000000000135018 XMM06=4fda316b135da52b0000000000133e08 XMM07=fb795ef6d65770560000000000124410 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff11001e5bed0 RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800f2df670 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d923f RFL=00000247 [---Z-PC] 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 00007f986fd2c700 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=00007f0c99bd0618 CR3=0000000015a38000 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=2030313a35343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a35343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000