[ 23.699177] BUG: Bad rss-counter state mm:000000003989c30d type:MM_FILEPAGES val:33 [ 23.700689] BUG: Bad rss-counter state mm:000000003989c30d type:MM_ANONPAGES val:22 [ 23.855700] ================================================================== [ 23.856774] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.857858] Read of size 8 at addr ffff888016bbed08 by task sshd/218 [ 23.858911] [ 23.859254] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.860373] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.861524] Call Trace: [ 23.861912] [ 23.862248] dump_stack_lvl+0x91/0xf0 [ 23.862830] print_report+0xcc/0x620 [ 23.863413] ? __virt_addr_valid+0x102/0x340 [ 23.864066] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.864777] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.865495] kasan_report+0xbe/0xf0 [ 23.866052] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.866767] vma_interval_tree_remove+0xc75/0xec0 [ 23.867467] vma_prepare+0xc54/0x11a0 [ 23.868026] __split_vma+0x5af/0x950 [ 23.868566] ? __pfx___split_vma+0x10/0x10 [ 23.869180] ? find_held_lock+0x2c/0x110 [ 23.869790] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.870446] ? lock_is_held_type+0x9f/0x120 [ 23.871264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.872052] ? mtree_range_walk+0x632/0x900 [ 23.872681] ? mas_walk+0x5c7/0x7c0 [ 23.873235] do_vmi_munmap+0x1f1/0x2b0 [ 23.873788] mmap_region+0x1f9/0x2660 [ 23.874335] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.874919] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.875755] ? __pfx_lock_acquire+0x10/0x10 [ 23.876371] ? __pfx_mmap_region+0x10/0x10 [ 23.877097] ? security_mmap_addr+0x7d/0xa0 [ 23.877719] ? get_unmapped_area+0x1f5/0x3f0 [ 23.878353] do_mmap+0x854/0xf00 [ 23.878850] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.879430] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.880086] ksys_mmap_pgoff+0x3af/0x500 [ 23.880676] do_syscall_64+0x3f/0x90 [ 23.881243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.881991] RIP: 0033:0x7fb159febd82 [ 23.882512] 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 [ 23.885182] RSP: 002b:00007ffd6a24bd68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.886234] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb159febd82 [ 23.887237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb159425000 [ 23.888197] RBP: 00007fb159425000 R08: 0000000000000009 R09: 0000000000001000 [ 23.889197] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d27505f70 [ 23.890177] R13: 00007ffd6a24bd80 R14: 00007ffd6a24bdb0 R15: 00007ffd6a24c110 [ 23.891150] [ 23.891492] [ 23.891738] Allocated by task 211: [ 23.892245] kasan_save_stack+0x22/0x50 [ 23.892848] kasan_set_track+0x25/0x30 [ 23.893420] __kasan_slab_alloc+0x59/0x70 [ 23.894032] kmem_cache_alloc+0x16b/0x370 [ 23.894638] vm_area_dup+0x20/0x160 [ 23.895174] __split_vma+0x170/0x950 [ 23.895723] split_vma+0xc6/0x110 [ 23.896279] mprotect_fixup+0x8d2/0xb30 [ 23.896864] do_mprotect_pkey+0x87e/0xd40 [ 23.897477] __x64_sys_mprotect+0x78/0xc0 [ 23.898079] do_syscall_64+0x3f/0x90 [ 23.898629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.899445] [ 23.899718] Freed by task 211: [ 23.900178] kasan_save_stack+0x22/0x50 [ 23.900757] kasan_set_track+0x25/0x30 [ 23.901334] kasan_save_free_info+0x2b/0x50 [ 23.901961] __kasan_slab_free+0x10a/0x190 [ 23.902575] kmem_cache_free+0x10d/0x4d0 [ 23.903226] rcu_core+0x8c8/0x2860 [ 23.903742] __do_softirq+0x1b7/0x7d4 [ 23.904288] [ 23.904537] Last potentially related work creation: [ 23.905207] kasan_save_stack+0x22/0x50 [ 23.905787] __kasan_record_aux_stack+0x8e/0xa0 [ 23.906446] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.907191] remove_vma+0x139/0x170 [ 23.907702] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.908374] do_vmi_munmap+0x1f1/0x2b0 [ 23.908938] __vm_munmap+0x138/0x3a0 [ 23.909470] __x64_sys_munmap+0x59/0x80 [ 23.910041] do_syscall_64+0x3f/0x90 [ 23.910634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.911384] [ 23.911628] The buggy address belongs to the object at ffff888016bbecb0 [ 23.911628] which belongs to the cache vm_area_struct of size 168 [ 23.913373] The buggy address is located 88 bytes inside of [ 23.913373] freed 168-byte region [ffff888016bbecb0, ffff888016bbed58) [ 23.914993] [ 23.915260] The buggy address belongs to the physical page: [ 23.916052] page:00000000b3e3e633 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16bbe [ 23.917310] memcg:ffff88800c62d601 [ 23.917800] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.918614] page_type: 0xffffffff() [ 23.919186] raw: 0100000000000200 ffff8880087a0c80 ffffea00005aef00 dead000000000007 [ 23.920252] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c62d601 [ 23.921303] page dumped because: kasan: bad access detected [ 23.922104] [ 23.922356] Memory state around the buggy address: [ 23.923028] ffff888016bbec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.924091] ffff888016bbec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 23.925076] >ffff888016bbed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 23.926058] ^ [ 23.926547] ffff888016bbed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.927584] ffff888016bbee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 23.928577] ================================================================== [ 23.929812] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.535716] BUG: Bad rss-counter state mm:00000000beeb8fde type:MM_FILEPAGES val:33 [ 25.536434] BUG: Bad rss-counter state mm:00000000beeb8fde type:MM_ANONPAGES val:22 [ 26.030231] BUG: Bad rss-counter state mm:000000008c51e4ca type:MM_FILEPAGES val:33 [ 26.031661] BUG: Bad rss-counter state mm:000000008c51e4ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39723' (ECDSA) to the list of known hosts. 2023/06/21 00:39:09 fuzzer started 2023/06/21 00:39:09 dialing manager at localhost:36067 2023/06/21 00:39:09 checking machine... 2023/06/21 00:39:09 checking revisions... [ 26.734771] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:39:09 testing simple program... [ 26.792492] cgroup: Unknown subsys name 'net' [ 26.836556] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:39:09 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff888015967260 RCX=0000000000000000 RDX=ffffffff87b89c40 RSI=ffffffff848ff1e0 RDI=ffff888015967278 RBP=ffffffff848ff1e0 RSP=ffff888016e8f690 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff87b89c40 R13=0000000000000002 R14=ffff8880159672a8 R15=ffff888015967260 RIP=ffffffff812db280 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 00007fcb1ad6c700 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=00007fda520b701c CR3=000000000da04000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36383335342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363833 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fb281ebb7f0 CR3=0000000014524000 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=42cdd95cdda3a3a71d4cb3cde63580ec XMM02=eff9b2d0a8fce9cb000000000011b938 XMM03=2c67c8bc2e329bc3000000000011ba60 XMM04=abe6e6f1c43ee49100000000000ae988 XMM05=d6886053ebb81bec0000000000133188 XMM06=751b9502027dc0b90000000000131cb0 XMM07=fb795ef6d65770560000000000122118 XMM08=2c67c8bc2e329bc3000000000011ba60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000