[ 32.491347] BUG: Bad rss-counter state mm:00000000ddc86103 type:MM_FILEPAGES val:33 [ 32.492367] BUG: Bad rss-counter state mm:00000000ddc86103 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.668166] ================================================================== [ 32.669211] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.670336] Read of size 8 at addr ffff8880094dc058 by task sshd/225 [ 32.671180] [ 32.671411] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.672343] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.673433] Call Trace: [ 32.673778] [ 32.674084] dump_stack_lvl+0x91/0xf0 [ 32.674607] print_report+0xcc/0x620 [ 32.675166] ? __virt_addr_valid+0x102/0x340 [ 32.675770] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.676436] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.677137] kasan_report+0xbe/0xf0 [ 32.677659] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.678331] vma_interval_tree_remove+0xc75/0xec0 [ 32.679001] vma_prepare+0xc54/0x11a0 [ 32.679512] __split_vma+0x5af/0x950 [ 32.680016] ? __pfx___split_vma+0x10/0x10 [ 32.680592] ? find_held_lock+0x2c/0x110 [ 32.681192] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.681792] ? lock_is_held_type+0x9f/0x120 [ 32.682378] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.683045] ? mtree_range_walk+0x632/0x900 [ 32.683641] ? mas_walk+0x5c7/0x7c0 [ 32.684159] do_vmi_munmap+0x1f1/0x2b0 [ 32.684687] mmap_region+0x1f9/0x2660 [ 32.685239] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.685797] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.686562] ? __pfx_lock_acquire+0x10/0x10 [ 32.687170] ? __pfx_mmap_region+0x10/0x10 [ 32.687745] ? security_mmap_addr+0x7d/0xa0 [ 32.688307] ? get_unmapped_area+0x1f5/0x3f0 [ 32.688932] do_mmap+0x854/0xf00 [ 32.689412] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.689939] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.690540] ksys_mmap_pgoff+0x3af/0x500 [ 32.691103] do_syscall_64+0x3f/0x90 [ 32.691622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.692323] RIP: 0033:0x7fc305a34d82 [ 32.692816] 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 [ 32.695151] RSP: 002b:00007ffe025e71d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.696126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc305a34d82 [ 32.697066] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc304e6e000 [ 32.697976] RBP: 00007fc304e6e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.698891] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e63b937d90 [ 32.699795] R13: 00007ffe025e71f0 R14: 00007ffe025e7220 R15: 00007ffe025e7580 [ 32.700727] [ 32.701073] [ 32.701308] Allocated by task 218: [ 32.701768] kasan_save_stack+0x22/0x50 [ 32.702309] kasan_set_track+0x25/0x30 [ 32.702854] __kasan_slab_alloc+0x59/0x70 [ 32.703425] kmem_cache_alloc+0x16b/0x370 [ 32.703970] vm_area_dup+0x20/0x160 [ 32.704452] __split_vma+0x170/0x950 [ 32.704986] split_vma+0xc6/0x110 [ 32.705460] mprotect_fixup+0x8d2/0xb30 [ 32.705996] do_mprotect_pkey+0x87e/0xd40 [ 32.706539] __x64_sys_mprotect+0x78/0xc0 [ 32.707111] do_syscall_64+0x3f/0x90 [ 32.707610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.708289] [ 32.708518] Freed by task 203: [ 32.708971] kasan_save_stack+0x22/0x50 [ 32.709496] kasan_set_track+0x25/0x30 [ 32.710017] kasan_save_free_info+0x2b/0x50 [ 32.710584] __kasan_slab_free+0x10a/0x190 [ 32.711219] kmem_cache_free+0x10d/0x4d0 [ 32.711763] rcu_core+0x8c8/0x2860 [ 32.712242] __do_softirq+0x1b7/0x7d4 [ 32.712750] [ 32.713015] Last potentially related work creation: [ 32.713651] kasan_save_stack+0x22/0x50 [ 32.714189] __kasan_record_aux_stack+0x8e/0xa0 [ 32.714813] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.715490] remove_vma+0x139/0x170 [ 32.715967] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.716559] do_vmi_munmap+0x1f1/0x2b0 [ 32.717124] __vm_munmap+0x138/0x3a0 [ 32.717612] __x64_sys_munmap+0x59/0x80 [ 32.718142] do_syscall_64+0x3f/0x90 [ 32.718636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.719328] [ 32.719551] The buggy address belongs to the object at ffff8880094dc000 [ 32.719551] which belongs to the cache vm_area_struct of size 168 [ 32.721141] The buggy address is located 88 bytes inside of [ 32.721141] freed 168-byte region [ffff8880094dc000, ffff8880094dc0a8) [ 32.722667] [ 32.722927] The buggy address belongs to the physical page: [ 32.723617] page:0000000032706af4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94dc [ 32.724750] memcg:ffff88800c528f01 [ 32.725251] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.725996] page_type: 0xffffffff() [ 32.726473] raw: 0100000000000200 ffff88800879fc80 ffffea00003c0980 dead000000000007 [ 32.727455] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c528f01 [ 32.728408] page dumped because: kasan: bad access detected [ 32.729141] [ 32.729367] Memory state around the buggy address: [ 32.729971] ffff8880094dbf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.730871] ffff8880094dbf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.731770] >ffff8880094dc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.732648] ^ [ 32.733505] ffff8880094dc080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.734400] ffff8880094dc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.735300] ================================================================== [ 32.736306] Disabling lock debugging due to kernel taint [ 35.016210] BUG: Bad rss-counter state mm:00000000ea008cfa type:MM_FILEPAGES val:33 [ 35.017393] BUG: Bad rss-counter state mm:00000000ea008cfa type:MM_ANONPAGES val:22 [ 35.390027] BUG: Bad rss-counter state mm:000000008b2ca2c0 type:MM_FILEPAGES val:33 [ 35.391048] BUG: Bad rss-counter state mm:000000008b2ca2c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35647' (ECDSA) to the list of known hosts. 2023/06/19 22:12:09 fuzzer started 2023/06/19 22:12:09 dialing manager at localhost:44161 2023/06/19 22:12:09 checking machine... 2023/06/19 22:12:09 checking revisions... [ 36.176769] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:12:09 testing simple program... [ 36.230570] cgroup: Unknown subsys name 'net' [ 36.297577] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:12:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806ce098e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000216 [----AP-] 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 00007fd8db883700 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=00007f9ebf6f20b0 CR3=000000000e35a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed100399bfda RBX=000000000000e382 RCX=0000000000000000 RDX=ffff888015c0d1c0 RSI=ffffffff813c9c14 RDI=0000000000000005 RBP=ffff88801ccdfed0 RSP=ffff88801ccdfe28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000006490d2b9 R13=000000001dcd6500 R14=1ffff1100399bfda R15=dffffc0000000000 RIP=ffffffff813c9c20 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 00007f9ebf13a900 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=00007ffc4c944000 CR3=000000000f316000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000