syzkaller login: [ 30.923666] BUG: Bad rss-counter state mm:00000000995e4d01 type:MM_FILEPAGES val:33 [ 30.925218] BUG: Bad rss-counter state mm:00000000995e4d01 type:MM_ANONPAGES val:22 [ 31.066908] ================================================================== [ 31.067603] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.068333] Read of size 8 at addr ffff888018f094e0 by task sshd/221 [ 31.068889] [ 31.069047] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.069692] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.070438] Call Trace: [ 31.070980] [ 31.071195] dump_stack_lvl+0x91/0xf0 [ 31.071558] print_report+0xcc/0x620 [ 31.071924] ? __virt_addr_valid+0x102/0x340 [ 31.072338] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.072791] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.073250] kasan_report+0xbe/0xf0 [ 31.073607] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074050] vma_interval_tree_remove+0xc75/0xec0 [ 31.074495] vma_prepare+0xc54/0x11a0 [ 31.074863] __split_vma+0x5af/0x950 [ 31.075208] ? __pfx___split_vma+0x10/0x10 [ 31.075602] ? find_held_lock+0x2c/0x110 [ 31.076036] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.076455] ? lock_is_held_type+0x9f/0x120 [ 31.076857] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.077305] ? mtree_range_walk+0x632/0x900 [ 31.077714] ? mas_walk+0x5c7/0x7c0 [ 31.078066] do_vmi_munmap+0x1f1/0x2b0 [ 31.078438] mmap_region+0x1f9/0x2660 [ 31.078806] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.079191] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.079712] ? __pfx_lock_acquire+0x10/0x10 [ 31.080168] ? __pfx_mmap_region+0x10/0x10 [ 31.080561] ? security_mmap_addr+0x7d/0xa0 [ 31.080955] ? get_unmapped_area+0x1f5/0x3f0 [ 31.081355] do_mmap+0x854/0xf00 [ 31.081680] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.082047] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.082468] ksys_mmap_pgoff+0x3af/0x500 [ 31.082871] do_syscall_64+0x3f/0x90 [ 31.083228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.083697] RIP: 0033:0x7f1bb3f18d82 [ 31.084035] 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 [ 31.085624] RSP: 002b:00007ffe5df73058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.086283] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bb3f18d82 [ 31.086891] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bb3352000 [ 31.087503] RBP: 00007f1bb3352000 R08: 0000000000000009 R09: 0000000000001000 [ 31.088157] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fddd3ead90 [ 31.088765] R13: 00007ffe5df73070 R14: 00007ffe5df730a0 R15: 00007ffe5df73400 [ 31.089419] [ 31.089636] [ 31.089786] Allocated by task 214: [ 31.090097] kasan_save_stack+0x22/0x50 [ 31.090465] kasan_set_track+0x25/0x30 [ 31.090811] __kasan_slab_alloc+0x59/0x70 [ 31.091188] kmem_cache_alloc+0x16b/0x370 [ 31.091553] vm_area_dup+0x20/0x160 [ 31.091908] __split_vma+0x170/0x950 [ 31.092260] split_vma+0xc6/0x110 [ 31.092588] mprotect_fixup+0x8d2/0xb30 [ 31.092968] do_mprotect_pkey+0x87e/0xd40 [ 31.093355] __x64_sys_mprotect+0x78/0xc0 [ 31.093734] do_syscall_64+0x3f/0x90 [ 31.094078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.094546] [ 31.094709] Freed by task 13: [ 31.094996] kasan_save_stack+0x22/0x50 [ 31.095357] kasan_set_track+0x25/0x30 [ 31.095721] kasan_save_free_info+0x2b/0x50 [ 31.096123] __kasan_slab_free+0x10a/0x190 [ 31.096504] kmem_cache_free+0x10d/0x4d0 [ 31.096894] rcu_core+0x8c8/0x2860 [ 31.097213] __do_softirq+0x1b7/0x7d4 [ 31.097558] [ 31.097712] Last potentially related work creation: [ 31.098182] kasan_save_stack+0x22/0x50 [ 31.098540] __kasan_record_aux_stack+0x8e/0xa0 [ 31.098949] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.099420] remove_vma+0x139/0x170 [ 31.099746] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.100170] do_vmi_munmap+0x1f1/0x2b0 [ 31.100540] __vm_munmap+0x138/0x3a0 [ 31.100912] __x64_sys_munmap+0x59/0x80 [ 31.101275] do_syscall_64+0x3f/0x90 [ 31.101620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.102083] [ 31.102242] The buggy address belongs to the object at ffff888018f09488 [ 31.102242] which belongs to the cache vm_area_struct of size 168 [ 31.103354] The buggy address is located 88 bytes inside of [ 31.103354] freed 168-byte region [ffff888018f09488, ffff888018f09530) [ 31.104411] [ 31.104570] The buggy address belongs to the physical page: [ 31.105062] page:000000009ed3aa89 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f09 [ 31.105871] memcg:ffff888016e95301 [ 31.106212] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.106691] page_type: 0xffffffff() [ 31.107022] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.107693] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e95301 [ 31.108353] page dumped because: kasan: bad access detected [ 31.108850] [ 31.109014] Memory state around the buggy address: [ 31.109430] ffff888018f09380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.110090] ffff888018f09400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.110730] >ffff888018f09480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.111341] ^ [ 31.111902] ffff888018f09500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.112540] ffff888018f09580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.113169] ================================================================== [ 31.114089] Disabling lock debugging due to kernel taint [ 32.593968] sshd (221) used greatest stack depth: 24120 bytes left [ 32.594643] BUG: Bad rss-counter state mm:0000000071e0c419 type:MM_FILEPAGES val:33 [ 32.595300] BUG: Bad rss-counter state mm:0000000071e0c419 type:MM_ANONPAGES val:22 [ 32.975536] BUG: Bad rss-counter state mm:0000000003ac4c6b type:MM_FILEPAGES val:33 [ 32.977060] BUG: Bad rss-counter state mm:0000000003ac4c6b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16659' (ECDSA) to the list of known hosts. 2023/06/21 09:15:40 fuzzer started 2023/06/21 09:15:40 dialing manager at localhost:36067 2023/06/21 09:15:40 checking machine... 2023/06/21 09:15:40 checking revisions... [ 33.611800] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:15:40 testing simple program... [ 33.657516] cgroup: Unknown subsys name 'net' [ 33.710037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:15:40 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=00007ffed2389958 CR3=00000000158aa000 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=2030343a35313a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a35313a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88800f51d000 RCX=0000000000000000 RDX=ffff8880101fd1c0 RSI=ffffffff8199aa99 RDI=ffff88800f51d000 RBP=ffff88800f51d000 RSP=ffff888014247c30 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888014247d88 R13=ffff88800d1851a0 R14=dffffc0000000000 R15=ffff888014247d88 RIP=ffffffff814c0880 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 00007f24d3b69900 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=00007f24d2fb20e0 CR3=000000000c610000 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=61cb1bcde0495d914542571c827dc933 XMM02=ec2efd57dc4c00df000000000011a648 XMM03=c64b91d46def92e8000000000011a718 XMM04=954cb068b6ebca7300000000000ae988 XMM05=3babd81bd9d794810000000000132048 XMM06=c291bd5c70af25b90000000000131a40 XMM07=e042d86d42eb936e0000000000121da0 XMM08=c64b91d46def92e8000000000011a718 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000