syzkaller login: [ 37.593454] BUG: Bad rss-counter state mm:000000001192268c type:MM_FILEPAGES val:33 [ 37.594682] BUG: Bad rss-counter state mm:000000001192268c type:MM_ANONPAGES val:22 [ 37.638048] ================================================================== [ 37.639204] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.640287] Read of size 8 at addr ffff88800ecc4d08 by task sshd/220 [ 37.641200] [ 37.641457] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.642458] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.643583] Call Trace: [ 37.643951] [ 37.644280] dump_stack_lvl+0x91/0xf0 [ 37.644846] print_report+0xcc/0x620 [ 37.645425] ? __virt_addr_valid+0x102/0x340 [ 37.646070] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.646785] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.647510] kasan_report+0xbe/0xf0 [ 37.648064] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.648789] vma_interval_tree_remove+0xc75/0xec0 [ 37.649492] vma_prepare+0xc54/0x11a0 [ 37.649987] __split_vma+0x5af/0x950 [ 37.650463] ? __pfx___split_vma+0x10/0x10 [ 37.650994] ? find_held_lock+0x2c/0x110 [ 37.651516] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.652084] ? lock_is_held_type+0x9f/0x120 [ 37.652628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.653254] ? mtree_range_walk+0x632/0x900 [ 37.653816] ? mas_walk+0x5c7/0x7c0 [ 37.654298] do_vmi_munmap+0x1f1/0x2b0 [ 37.654797] mmap_region+0x1f9/0x2660 [ 37.655289] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.655810] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.656535] ? __pfx_lock_acquire+0x10/0x10 [ 37.657080] ? __pfx_mmap_region+0x10/0x10 [ 37.657634] ? security_mmap_addr+0x7d/0xa0 [ 37.658165] ? get_unmapped_area+0x1f5/0x3f0 [ 37.658733] do_mmap+0x854/0xf00 [ 37.659186] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.659679] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.660249] ksys_mmap_pgoff+0x3af/0x500 [ 37.660766] do_syscall_64+0x3f/0x90 [ 37.661250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.661901] RIP: 0033:0x7f8530a9cd82 [ 37.662360] 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 [ 37.664713] RSP: 002b:00007fff3f23c2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.665640] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8530a9cd82 [ 37.666507] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f852fed6000 [ 37.667378] RBP: 00007f852fed6000 R08: 0000000000000009 R09: 0000000000001000 [ 37.668227] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d4db83980 [ 37.669104] R13: 00007fff3f23c310 R14: 00007fff3f23c340 R15: 00007fff3f23c6a0 [ 37.669974] [ 37.670271] [ 37.670487] Allocated by task 213: [ 37.670914] kasan_save_stack+0x22/0x50 [ 37.671419] kasan_set_track+0x25/0x30 [ 37.671917] __kasan_slab_alloc+0x59/0x70 [ 37.672455] kmem_cache_alloc+0x16b/0x370 [ 37.672981] vm_area_dup+0x20/0x160 [ 37.673461] __split_vma+0x170/0x950 [ 37.673934] split_vma+0xc6/0x110 [ 37.674375] mprotect_fixup+0x8d2/0xb30 [ 37.674883] do_mprotect_pkey+0x87e/0xd40 [ 37.675409] __x64_sys_mprotect+0x78/0xc0 [ 37.675951] do_syscall_64+0x3f/0x90 [ 37.676438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.677111] [ 37.677338] Freed by task 213: [ 37.677745] kasan_save_stack+0x22/0x50 [ 37.678263] kasan_set_track+0x25/0x30 [ 37.678776] kasan_save_free_info+0x2b/0x50 [ 37.679328] __kasan_slab_free+0x10a/0x190 [ 37.679884] kmem_cache_free+0x10d/0x4d0 [ 37.680407] rcu_core+0x8c8/0x2860 [ 37.680865] __do_softirq+0x1b7/0x7d4 [ 37.681388] [ 37.681611] Last potentially related work creation: [ 37.682218] kasan_save_stack+0x22/0x50 [ 37.682746] __kasan_record_aux_stack+0x8e/0xa0 [ 37.683343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.684004] remove_vma+0x139/0x170 [ 37.684474] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.685049] do_vmi_munmap+0x1f1/0x2b0 [ 37.685564] __vm_munmap+0x138/0x3a0 [ 37.686044] __x64_sys_munmap+0x59/0x80 [ 37.686559] do_syscall_64+0x3f/0x90 [ 37.687045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.687709] [ 37.687927] The buggy address belongs to the object at ffff88800ecc4cb0 [ 37.687927] which belongs to the cache vm_area_struct of size 168 [ 37.689459] The buggy address is located 88 bytes inside of [ 37.689459] freed 168-byte region [ffff88800ecc4cb0, ffff88800ecc4d58) [ 37.690916] [ 37.691136] The buggy address belongs to the physical page: [ 37.691818] page:00000000c1405227 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecc4 [ 37.692944] memcg:ffff88800ecc5001 [ 37.693411] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.694075] page_type: 0xffffffff() [ 37.694541] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 37.695488] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecc5001 [ 37.696436] page dumped because: kasan: bad access detected [ 37.697133] [ 37.697356] Memory state around the buggy address: [ 37.697955] ffff88800ecc4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.698854] ffff88800ecc4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.699749] >ffff88800ecc4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.700632] ^ [ 37.701090] ffff88800ecc4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.702011] ffff88800ecc4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 37.702893] ================================================================== [ 37.704108] Disabling lock debugging due to kernel taint [ 39.539276] BUG: Bad rss-counter state mm:000000002d02743f type:MM_FILEPAGES val:33 [ 39.540465] BUG: Bad rss-counter state mm:000000002d02743f type:MM_ANONPAGES val:22 [ 39.874496] BUG: Bad rss-counter state mm:000000009b8b6d26 type:MM_FILEPAGES val:33 [ 39.876172] BUG: Bad rss-counter state mm:000000009b8b6d26 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39822' (ECDSA) to the list of known hosts. 2023/06/19 18:04:41 fuzzer started 2023/06/19 18:04:41 dialing manager at localhost:44161 2023/06/19 18:04:41 checking machine... 2023/06/19 18:04:41 checking revisions... [ 40.577759] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:04:41 testing simple program... [ 40.612696] cgroup: Unknown subsys name 'net' [ 40.677681] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:04:34 Registers: info registers vcpu 0 RAX=1ffffffff0a58b20 RBX=0000000000039500 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff8121b56b RDI=ffffffff852c5900 RBP=ffff888008d7fe98 RSP=ffff888008d7fd68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=0000000000039500 R13=0000000000000000 R14=ffff888008d70000 R15=0000000000000000 RIP=ffffffff84516c83 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 0000000000000000 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=00007f953e307690 CR3=000000000f1e4000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=00000000000000000000000000000000 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=828314be7d5f1ff100000000000ae988 XMM05=f1b6ab872401e61e00000000001352f0 XMM06=4fda316b135da52b00000000001340e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=ffff88806cf09a98 RCX=0000000000000002 RDX=ffff88806cf09b01 RSI=ffff88806cf09b30 RDI=ffff88806cf09aa8 RBP=ffff88806cf09b30 RSP=ffff88806cf099a0 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09b30 R15=ffff88806cf09a98 RIP=ffffffff8113048d 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 00007f3eeac26900 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=00007ffc03c2e000 CR3=000000000eccc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000