[ 30.748374] BUG: Bad rss-counter state mm:00000000ce3517c8 type:MM_FILEPAGES val:33 [ 30.749385] BUG: Bad rss-counter state mm:00000000ce3517c8 type:MM_ANONPAGES val:22 [ 30.910927] ================================================================== [ 30.911874] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.912814] Read of size 8 at addr ffff8880144e43f8 by task sshd/220 [ 30.913729] [ 30.913951] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.914822] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.915843] Call Trace: [ 30.916165] [ 30.916448] dump_stack_lvl+0x91/0xf0 [ 30.916936] print_report+0xcc/0x620 [ 30.917421] ? __virt_addr_valid+0x102/0x340 [ 30.917975] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.918589] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.919204] kasan_report+0xbe/0xf0 [ 30.919687] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.920318] vma_interval_tree_remove+0xc75/0xec0 [ 30.920941] vma_prepare+0xc54/0x11a0 [ 30.921438] __split_vma+0x5af/0x950 [ 30.921933] ? __pfx___split_vma+0x10/0x10 [ 30.922483] ? find_held_lock+0x2c/0x110 [ 30.923026] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.923633] ? lock_is_held_type+0x9f/0x120 [ 30.924231] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.924878] ? mtree_range_walk+0x632/0x900 [ 30.925473] ? mas_walk+0x5c7/0x7c0 [ 30.925974] do_vmi_munmap+0x1f1/0x2b0 [ 30.926507] mmap_region+0x1f9/0x2660 [ 30.927012] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.927567] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.928337] ? __pfx_lock_acquire+0x10/0x10 [ 30.928907] ? __pfx_mmap_region+0x10/0x10 [ 30.929470] ? security_mmap_addr+0x7d/0xa0 [ 30.930034] ? get_unmapped_area+0x1f5/0x3f0 [ 30.930618] do_mmap+0x854/0xf00 [ 30.931079] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.931616] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.932213] ksys_mmap_pgoff+0x3af/0x500 [ 30.932759] do_syscall_64+0x3f/0x90 [ 30.933269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.933963] RIP: 0033:0x7f9dc2b6ed82 [ 30.934450] 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 [ 30.936741] RSP: 002b:00007ffed5def8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.937718] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9dc2b6ed82 [ 30.938626] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9dc1fa8000 [ 30.939530] RBP: 00007f9dc1fa8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.940440] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558fa35ccec0 [ 30.941343] R13: 00007ffed5def900 R14: 00007ffed5def930 R15: 00007ffed5defc90 [ 30.942264] [ 30.942576] [ 30.942802] Allocated by task 213: [ 30.943259] kasan_save_stack+0x22/0x50 [ 30.943816] kasan_set_track+0x25/0x30 [ 30.944339] __kasan_slab_alloc+0x59/0x70 [ 30.944893] kmem_cache_alloc+0x16b/0x370 [ 30.945440] vm_area_dup+0x20/0x160 [ 30.945923] __split_vma+0x170/0x950 [ 30.946416] split_vma+0xc6/0x110 [ 30.946869] mprotect_fixup+0x8d2/0xb30 [ 30.947395] do_mprotect_pkey+0x87e/0xd40 [ 30.947960] __x64_sys_mprotect+0x78/0xc0 [ 30.948513] do_syscall_64+0x3f/0x90 [ 30.949020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.949716] [ 30.949943] Freed by task 19: [ 30.950351] kasan_save_stack+0x22/0x50 [ 30.950884] kasan_set_track+0x25/0x30 [ 30.951407] kasan_save_free_info+0x2b/0x50 [ 30.951993] __kasan_slab_free+0x10a/0x190 [ 30.952560] kmem_cache_free+0x10d/0x4d0 [ 30.953089] rcu_core+0x8c8/0x2860 [ 30.953561] __do_softirq+0x1b7/0x7d4 [ 30.954064] [ 30.954290] Last potentially related work creation: [ 30.954989] kasan_save_stack+0x22/0x50 [ 30.955531] __kasan_record_aux_stack+0x8e/0xa0 [ 30.956124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.956794] remove_vma+0x139/0x170 [ 30.957260] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.957838] do_vmi_munmap+0x1f1/0x2b0 [ 30.958344] __vm_munmap+0x138/0x3a0 [ 30.958826] __x64_sys_munmap+0x59/0x80 [ 30.959341] do_syscall_64+0x3f/0x90 [ 30.959846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.960518] [ 30.960737] The buggy address belongs to the object at ffff8880144e43a0 [ 30.960737] which belongs to the cache vm_area_struct of size 168 [ 30.962250] The buggy address is located 88 bytes inside of [ 30.962250] freed 168-byte region [ffff8880144e43a0, ffff8880144e4448) [ 30.963719] [ 30.963941] The buggy address belongs to the physical page: [ 30.964619] page:00000000787ce68f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144e4 [ 30.965753] memcg:ffff88800e34b701 [ 30.966201] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.966871] page_type: 0xffffffff() [ 30.967338] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.968304] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e34b701 [ 30.969244] page dumped because: kasan: bad access detected [ 30.969933] [ 30.970156] Memory state around the buggy address: [ 30.970743] ffff8880144e4280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.971646] ffff8880144e4300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.972590] >ffff8880144e4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.973510] ^ [ 30.974425] ffff8880144e4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.975333] ffff8880144e4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.976240] ================================================================== [ 30.977249] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.849611] BUG: Bad rss-counter state mm:00000000a193221b type:MM_FILEPAGES val:33 [ 32.850605] BUG: Bad rss-counter state mm:00000000a193221b type:MM_ANONPAGES val:22 [ 33.258874] BUG: Bad rss-counter state mm:0000000060a6f91c type:MM_FILEPAGES val:33 [ 33.260322] BUG: Bad rss-counter state mm:0000000060a6f91c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30258' (ECDSA) to the list of known hosts. 2023/06/21 06:52:27 fuzzer started 2023/06/21 06:52:27 dialing manager at localhost:36067 2023/06/21 06:52:27 checking machine... 2023/06/21 06:52:27 checking revisions... [ 34.004113] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:52:27 testing simple program... [ 34.051822] cgroup: Unknown subsys name 'net' [ 34.092898] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:52:26 Registers: info registers vcpu 0 RAX=1ffff11001b4d2d1 RBX=ffff88800da69658 RCX=1ffff11001ce4c60 RDX=dffffc0000000000 RSI=ffff888015b06000 RDI=ffff88800da69688 RBP=ffff88800e7262d0 RSP=ffff888019b7f638 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888015b04000 R13=0000000000000000 R14=ffff88800946a048 R15=ffff88800946a000 RIP=ffffffff8184767e RFL=00000046 [---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 00007f6fbf643900 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=00007f6fbfbfa618 CR3=000000000c800000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fff72c8a2f8 CR3=000000000f6bc000 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=2036323a32353a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a32353a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000