syzkaller login: [ 30.561204] BUG: Bad rss-counter state mm:000000000c12f71e type:MM_FILEPAGES val:33 [ 30.562508] BUG: Bad rss-counter state mm:000000000c12f71e type:MM_ANONPAGES val:22 [ 30.710100] ================================================================== [ 30.711080] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.712079] Read of size 8 at addr ffff8880102a9d08 by task sshd/220 [ 30.713027] [ 30.713269] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.714225] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.715283] Call Trace: [ 30.715622] [ 30.715931] dump_stack_lvl+0x91/0xf0 [ 30.716471] print_report+0xcc/0x620 [ 30.717000] ? __virt_addr_valid+0x102/0x340 [ 30.717595] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.718271] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.718928] kasan_report+0xbe/0xf0 [ 30.719449] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.720139] vma_interval_tree_remove+0xc75/0xec0 [ 30.720803] vma_prepare+0xc54/0x11a0 [ 30.721336] __split_vma+0x5af/0x950 [ 30.721858] ? __pfx___split_vma+0x10/0x10 [ 30.722455] ? find_held_lock+0x2c/0x110 [ 30.723032] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.723660] ? lock_is_held_type+0x9f/0x120 [ 30.724264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.724942] ? mtree_range_walk+0x632/0x900 [ 30.725556] ? mas_walk+0x5c7/0x7c0 [ 30.726100] do_vmi_munmap+0x1f1/0x2b0 [ 30.726652] mmap_region+0x1f9/0x2660 [ 30.727185] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.727751] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.728544] ? __pfx_lock_acquire+0x10/0x10 [ 30.729131] ? __pfx_mmap_region+0x10/0x10 [ 30.729721] ? security_mmap_addr+0x7d/0xa0 [ 30.730315] ? get_unmapped_area+0x1f5/0x3f0 [ 30.730920] do_mmap+0x854/0xf00 [ 30.731405] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.731956] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.732581] ksys_mmap_pgoff+0x3af/0x500 [ 30.733146] do_syscall_64+0x3f/0x90 [ 30.733675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.734406] RIP: 0033:0x7f3601c2cd82 [ 30.734908] 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 [ 30.737271] RSP: 002b:00007ffc2b03fab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.738295] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3601c2cd82 [ 30.739237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3601066000 [ 30.740176] RBP: 00007f3601066000 R08: 0000000000000009 R09: 0000000000001000 [ 30.741112] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563320d2ec0 [ 30.742052] R13: 00007ffc2b03fad0 R14: 00007ffc2b03fb00 R15: 00007ffc2b03fe60 [ 30.743009] [ 30.743330] [ 30.743565] Allocated by task 213: [ 30.744044] kasan_save_stack+0x22/0x50 [ 30.744602] kasan_set_track+0x25/0x30 [ 30.745143] __kasan_slab_alloc+0x59/0x70 [ 30.745717] kmem_cache_alloc+0x16b/0x370 [ 30.746305] vm_area_dup+0x20/0x160 [ 30.746811] __split_vma+0x170/0x950 [ 30.747319] split_vma+0xc6/0x110 [ 30.747801] mprotect_fixup+0x8d2/0xb30 [ 30.748353] do_mprotect_pkey+0x87e/0xd40 [ 30.748930] __x64_sys_mprotect+0x78/0xc0 [ 30.749498] do_syscall_64+0x3f/0x90 [ 30.750018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.750739] [ 30.750980] Freed by task 203: [ 30.751416] kasan_save_stack+0x22/0x50 [ 30.751974] kasan_set_track+0x25/0x30 [ 30.752516] kasan_save_free_info+0x2b/0x50 [ 30.753102] __kasan_slab_free+0x10a/0x190 [ 30.753696] kmem_cache_free+0x10d/0x4d0 [ 30.754274] rcu_core+0x8c8/0x2860 [ 30.754767] __do_softirq+0x1b7/0x7d4 [ 30.755292] [ 30.755529] Last potentially related work creation: [ 30.756173] kasan_save_stack+0x22/0x50 [ 30.756730] __kasan_record_aux_stack+0x8e/0xa0 [ 30.757359] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.758070] remove_vma+0x139/0x170 [ 30.758571] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.759187] do_vmi_munmap+0x1f1/0x2b0 [ 30.759718] __vm_munmap+0x138/0x3a0 [ 30.760234] __x64_sys_munmap+0x59/0x80 [ 30.760785] do_syscall_64+0x3f/0x90 [ 30.761307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.762018] [ 30.762261] The buggy address belongs to the object at ffff8880102a9cb0 [ 30.762261] which belongs to the cache vm_area_struct of size 168 [ 30.763880] The buggy address is located 88 bytes inside of [ 30.763880] freed 168-byte region [ffff8880102a9cb0, ffff8880102a9d58) [ 30.765432] [ 30.765669] The buggy address belongs to the physical page: [ 30.766436] page:000000008f430a4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a9 [ 30.767649] memcg:ffff888009a56801 [ 30.768123] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.768843] page_type: 0xffffffff() [ 30.769342] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.770364] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a56801 [ 30.771378] page dumped because: kasan: bad access detected [ 30.772107] [ 30.772343] Memory state around the buggy address: [ 30.772983] ffff8880102a9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.773935] ffff8880102a9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.774897] >ffff8880102a9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.775834] ^ [ 30.776324] ffff8880102a9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.777268] ffff8880102a9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.778214] ================================================================== [ 30.779469] Disabling lock debugging due to kernel taint [ 32.635167] BUG: Bad rss-counter state mm:00000000e539e897 type:MM_FILEPAGES val:33 [ 32.636356] BUG: Bad rss-counter state mm:00000000e539e897 type:MM_ANONPAGES val:22 [ 33.191931] BUG: Bad rss-counter state mm:0000000019b6f8f7 type:MM_FILEPAGES val:33 [ 33.193094] BUG: Bad rss-counter state mm:0000000019b6f8f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32117' (ECDSA) to the list of known hosts. 2023/06/20 14:22:24 fuzzer started 2023/06/20 14:22:25 dialing manager at localhost:36067 2023/06/20 14:22:25 checking machine... 2023/06/20 14:22:25 checking revisions... [ 33.854865] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:22:25 testing simple program... [ 33.905646] cgroup: Unknown subsys name 'net' [ 33.949026] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:22:24 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff88800dabd5b4 RBP=ffff88800dabd1c0 RSP=ffff8880101ff870 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f82e330f477 R13=0000000000000000 R14=ffff88800dabd1c0 R15=0000000000092cc0 RIP=ffffffff8135bd96 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 00007f82e2e1c900 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=00007f82e33d1650 CR3=000000000fd2c000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180b321 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028e0eb4 RSI=ffffffff8180b321 RDI=ffff888014707610 RBP=ffff8880147075e0 RSP=ffff888014707540 R8 =0000000000000001 R9 =ffff888014707588 R10=0000000000038001 R11=0000000000020db7 R12=ffff888014707610 R13=0000000000000000 R14=ffff8880102d9b40 R15=ffff888018159b80 RIP=ffffffff813ad474 RFL=00000286 [--S--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 00007f5473489900 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=00007f5472887130 CR3=0000000008ebe000 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=339c87402aa45ab16d46c9a5761da574 XMM02=ec2efd57dc4c00df000000000011bbc8 XMM03=bcdf432c724121fa000000000011bc98 XMM04=d7e8f22168dbde8e00000000000ae988 XMM05=b744feef516279bc00000000001339d8 XMM06=7a361dd5fe03e03f0000000000132778 XMM07=fb795ef6d657705600000000001229e0 XMM08=2c67c8bc2e329bc3000000000011bc38 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000