syzkaller login: [ 31.414092] BUG: Bad rss-counter state mm:000000002929a84e type:MM_FILEPAGES val:33 [ 31.415773] BUG: Bad rss-counter state mm:000000002929a84e type:MM_ANONPAGES val:22 [ 31.578123] ================================================================== [ 31.579192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.580342] Read of size 8 at addr ffff88800e622798 by task sshd/219 [ 31.581291] [ 31.581560] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.582534] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.583649] Call Trace: [ 31.584009] [ 31.584332] dump_stack_lvl+0x91/0xf0 [ 31.584883] print_report+0xcc/0x620 [ 31.585426] ? __virt_addr_valid+0x102/0x340 [ 31.586048] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.586749] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.587503] kasan_report+0xbe/0xf0 [ 31.588090] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.588845] vma_interval_tree_remove+0xc75/0xec0 [ 31.589586] vma_prepare+0xc54/0x11a0 [ 31.590186] __split_vma+0x5af/0x950 [ 31.590772] ? __pfx___split_vma+0x10/0x10 [ 31.591440] ? find_held_lock+0x2c/0x110 [ 31.592083] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.592784] ? lock_is_held_type+0x9f/0x120 [ 31.593448] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.594193] ? mtree_range_walk+0x632/0x900 [ 31.594888] ? mas_walk+0x5c7/0x7c0 [ 31.595482] do_vmi_munmap+0x1f1/0x2b0 [ 31.596094] mmap_region+0x1f9/0x2660 [ 31.596697] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 31.597495] ? __pfx_mmap_region+0x10/0x10 [ 31.598158] do_mmap+0x854/0xf00 [ 31.598692] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.599317] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.600000] ksys_mmap_pgoff+0x3af/0x500 [ 31.600624] do_syscall_64+0x3f/0x90 [ 31.601218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.602009] RIP: 0033:0x7f059ba65d82 [ 31.602567] 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 [ 31.605232] RSP: 002b:00007ffd30638a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.606350] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f059ba65d82 [ 31.607404] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f059ae9f000 [ 31.608442] RBP: 00007f059ae9f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.609494] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579f1cb7ec0 [ 31.610530] R13: 00007ffd30638aa0 R14: 00007ffd30638ad0 R15: 00007ffd30638e30 [ 31.611608] [ 31.611976] [ 31.612238] Allocated by task 212: [ 31.612764] kasan_save_stack+0x22/0x50 [ 31.613394] kasan_set_track+0x25/0x30 [ 31.614008] __kasan_slab_alloc+0x59/0x70 [ 31.614650] kmem_cache_alloc+0x16b/0x370 [ 31.615290] vm_area_dup+0x20/0x160 [ 31.615849] __split_vma+0x170/0x950 [ 31.616419] split_vma+0xc6/0x110 [ 31.616971] mprotect_fixup+0x8d2/0xb30 [ 31.617584] do_mprotect_pkey+0x87e/0xd40 [ 31.618225] __x64_sys_mprotect+0x78/0xc0 [ 31.618873] do_syscall_64+0x3f/0x90 [ 31.619460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.620244] [ 31.620505] Freed by task 212: [ 31.620992] kasan_save_stack+0x22/0x50 [ 31.621684] kasan_set_track+0x25/0x30 [ 31.622290] kasan_save_free_info+0x2b/0x50 [ 31.622954] __kasan_slab_free+0x10a/0x190 [ 31.623613] kmem_cache_free+0x10d/0x4d0 [ 31.624229] rcu_core+0x8c8/0x2860 [ 31.624776] __do_softirq+0x1b7/0x7d4 [ 31.625368] [ 31.625630] Last potentially related work creation: [ 31.626353] kasan_save_stack+0x22/0x50 [ 31.626981] __kasan_record_aux_stack+0x8e/0xa0 [ 31.627688] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.628478] remove_vma+0x139/0x170 [ 31.629048] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.629726] do_vmi_munmap+0x1f1/0x2b0 [ 31.630321] __vm_munmap+0x138/0x3a0 [ 31.630923] __x64_sys_munmap+0x59/0x80 [ 31.631533] do_syscall_64+0x3f/0x90 [ 31.632116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.632908] [ 31.633169] The buggy address belongs to the object at ffff88800e622740 [ 31.633169] which belongs to the cache vm_area_struct of size 168 [ 31.634986] The buggy address is located 88 bytes inside of [ 31.634986] freed 168-byte region [ffff88800e622740, ffff88800e6227e8) [ 31.636729] [ 31.636998] The buggy address belongs to the physical page: [ 31.637806] page:0000000015cba55e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe622 [ 31.639165] memcg:ffff888009038e01 [ 31.639689] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.640478] page_type: 0xffffffff() [ 31.641042] raw: 0100000000000200 ffff8880087a0c80 ffffea000038d4c0 dead000000000002 [ 31.642173] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009038e01 [ 31.643303] page dumped because: kasan: bad access detected [ 31.644128] [ 31.644391] Memory state around the buggy address: [ 31.645108] ffff88800e622680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.646163] ffff88800e622700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.647233] >ffff88800e622780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.648272] ^ [ 31.648877] ffff88800e622800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.649943] ffff88800e622880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.651007] ================================================================== [ 31.652161] Disabling lock debugging due to kernel taint [ 34.281844] BUG: Bad rss-counter state mm:0000000026bd758c type:MM_FILEPAGES val:33 [ 34.282803] BUG: Bad rss-counter state mm:0000000026bd758c type:MM_ANONPAGES val:22 [ 34.752121] BUG: Bad rss-counter state mm:00000000f385aa67 type:MM_FILEPAGES val:33 [ 34.753107] BUG: Bad rss-counter state mm:00000000f385aa67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45986' (ECDSA) to the list of known hosts. 2023/06/20 19:46:01 fuzzer started 2023/06/20 19:46:01 dialing manager at localhost:36067 2023/06/20 19:46:01 checking machine... 2023/06/20 19:46:01 checking revisions... [ 35.455555] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:46:01 testing simple program... [ 35.502256] cgroup: Unknown subsys name 'net' [ 35.543590] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:46:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff83635bd7 RDI=ffff88806ce09b6c RBP=000000000000000f RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000009a9bb R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016bb9b40 R15=ffff88801aaa1ec0 RIP=ffffffff813ad4ee RFL=00000213 [----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 00007f1062dc5700 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=00007f2777f0b618 CR3=0000000019c08000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732030303a3634 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383533 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e37f01 RSI=ffff888008e37f28 RDI=ffff888008e37f28 RBP=ffff888008e379a8 RSP=ffff888008e378d8 R8 =0000000000000001 R9 =ffff888008e37990 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008e379b0 R13=ffff888008e37998 R14=ffff888008e37f28 R15=ffff888008e37950 RIP=ffffffff8112fbf3 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 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=00007fd0495e2640 CR3=000000000da08000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000