syzkaller login: [ 31.324273] BUG: Bad rss-counter state mm:0000000010fd8d34 type:MM_FILEPAGES val:33 [ 31.325703] BUG: Bad rss-counter state mm:0000000010fd8d34 type:MM_ANONPAGES val:22 [ 31.489708] ================================================================== [ 31.491000] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.492282] Read of size 8 at addr ffff88800f394d08 by task sshd/221 [ 31.493325] [ 31.493618] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.494782] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.496122] Call Trace: [ 31.496554] [ 31.496935] dump_stack_lvl+0x91/0xf0 [ 31.497598] print_report+0xcc/0x620 [ 31.498247] ? __virt_addr_valid+0x102/0x340 [ 31.499008] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.499862] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.500710] kasan_report+0xbe/0xf0 [ 31.501367] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.502211] vma_interval_tree_remove+0xc75/0xec0 [ 31.503041] vma_prepare+0xc54/0x11a0 [ 31.503736] __split_vma+0x5af/0x950 [ 31.504378] ? __pfx___split_vma+0x10/0x10 [ 31.505129] ? find_held_lock+0x2c/0x110 [ 31.505782] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.506513] ? lock_is_held_type+0x9f/0x120 [ 31.507197] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.507996] ? mtree_range_walk+0x632/0x900 [ 31.508698] ? mas_walk+0x5c7/0x7c0 [ 31.509298] do_vmi_munmap+0x1f1/0x2b0 [ 31.509899] mmap_region+0x1f9/0x2660 [ 31.510533] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.511180] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.512117] ? __pfx_lock_acquire+0x10/0x10 [ 31.512773] ? __pfx_mmap_region+0x10/0x10 [ 31.513326] ? security_mmap_addr+0x7d/0xa0 [ 31.513859] ? get_unmapped_area+0x1f5/0x3f0 [ 31.514452] do_mmap+0x854/0xf00 [ 31.514893] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.515429] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.516055] ksys_mmap_pgoff+0x3af/0x500 [ 31.516572] do_syscall_64+0x3f/0x90 [ 31.517066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.517716] RIP: 0033:0x7f53d8b6fd82 [ 31.518196] 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 [ 31.520379] RSP: 002b:00007ffe08783578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.521310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53d8b6fd82 [ 31.522190] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53d7fa9000 [ 31.523060] RBP: 00007f53d7fa9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.523965] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc6cfc2d90 [ 31.524891] R13: 00007ffe08783590 R14: 00007ffe087835c0 R15: 00007ffe08783920 [ 31.525828] [ 31.526154] [ 31.526380] Allocated by task 214: [ 31.526839] kasan_save_stack+0x22/0x50 [ 31.527384] kasan_set_track+0x25/0x30 [ 31.527923] __kasan_slab_alloc+0x59/0x70 [ 31.528494] kmem_cache_alloc+0x16b/0x370 [ 31.529057] vm_area_dup+0x20/0x160 [ 31.529549] __split_vma+0x170/0x950 [ 31.530073] split_vma+0xc6/0x110 [ 31.530547] mprotect_fixup+0x8d2/0xb30 [ 31.531102] do_mprotect_pkey+0x87e/0xd40 [ 31.531678] __x64_sys_mprotect+0x78/0xc0 [ 31.532232] do_syscall_64+0x3f/0x90 [ 31.532738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.533418] [ 31.533651] Freed by task 214: [ 31.534064] kasan_save_stack+0x22/0x50 [ 31.534594] kasan_set_track+0x25/0x30 [ 31.535103] kasan_save_free_info+0x2b/0x50 [ 31.535686] __kasan_slab_free+0x10a/0x190 [ 31.536251] kmem_cache_free+0x10d/0x4d0 [ 31.536780] rcu_core+0x8c8/0x2860 [ 31.537243] __do_softirq+0x1b7/0x7d4 [ 31.537737] [ 31.537984] Last potentially related work creation: [ 31.538601] kasan_save_stack+0x22/0x50 [ 31.539124] __kasan_record_aux_stack+0x8e/0xa0 [ 31.539752] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.540423] remove_vma+0x139/0x170 [ 31.540885] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.541471] do_vmi_munmap+0x1f1/0x2b0 [ 31.541968] __vm_munmap+0x138/0x3a0 [ 31.542458] __x64_sys_munmap+0x59/0x80 [ 31.542979] do_syscall_64+0x3f/0x90 [ 31.543470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.544162] [ 31.544385] Second to last potentially related work creation: [ 31.545091] kasan_save_stack+0x22/0x50 [ 31.545611] __kasan_record_aux_stack+0x8e/0xa0 [ 31.546206] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.546873] remove_vma+0x139/0x170 [ 31.547344] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.547926] do_vmi_munmap+0x1f1/0x2b0 [ 31.548437] mmap_region+0x1f9/0x2660 [ 31.548940] do_mmap+0x854/0xf00 [ 31.549390] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.549895] ksys_mmap_pgoff+0x3af/0x500 [ 31.550414] do_syscall_64+0x3f/0x90 [ 31.550908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.551599] [ 31.551831] The buggy address belongs to the object at ffff88800f394cb0 [ 31.551831] which belongs to the cache vm_area_struct of size 168 [ 31.553371] The buggy address is located 88 bytes inside of [ 31.553371] freed 168-byte region [ffff88800f394cb0, ffff88800f394d58) [ 31.554845] [ 31.555067] The buggy address belongs to the physical page: [ 31.555766] page:00000000df8b2ea8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf394 [ 31.556838] memcg:ffff88800e3d7b01 [ 31.557279] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.557938] page_type: 0xffffffff() [ 31.558384] raw: 0100000000000200 ffff88800879fc80 ffffea0000362d40 dead000000000008 [ 31.559309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3d7b01 [ 31.560229] page dumped because: kasan: bad access detected [ 31.560893] [ 31.561109] Memory state around the buggy address: [ 31.561686] ffff88800f394c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.562546] ffff88800f394c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.563418] >ffff88800f394d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.564309] ^ [ 31.564747] ffff88800f394d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.565617] ffff88800f394e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.566485] ================================================================== [ 31.567668] Disabling lock debugging due to kernel taint [ 33.561988] BUG: Bad rss-counter state mm:00000000a2f7a68d type:MM_FILEPAGES val:33 [ 33.563043] BUG: Bad rss-counter state mm:00000000a2f7a68d type:MM_ANONPAGES val:22 [ 34.120226] BUG: Bad rss-counter state mm:00000000c2ffc38d type:MM_FILEPAGES val:33 [ 34.121376] BUG: Bad rss-counter state mm:00000000c2ffc38d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12033' (ECDSA) to the list of known hosts. 2023/06/19 21:41:46 fuzzer started 2023/06/19 21:41:47 dialing manager at localhost:44161 2023/06/19 21:41:47 checking machine... 2023/06/19 21:41:47 checking revisions... [ 34.792358] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:41:47 testing simple program... [ 34.839280] cgroup: Unknown subsys name 'net' [ 34.917928] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:41:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008e18000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888008e18090 RBP=ffff888008e18090 RSP=ffff8880171df750 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0030733a745f6c65 R12=0000000000000293 R13=ffff8880171df928 R14=ffff888008e18090 R15=000000000000001e RIP=ffffffff812dffc0 RFL=00000082 [--S----] 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 00007faa88d1c700 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=00007f6262e69650 CR3=0000000015d34000 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=63736964203a31313a38303730352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383037 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f5017027d08 CR3=000000000c6f4000 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=ad7e3ab461384a86fb4a8365d25bca87 XMM02=000000000011cb28eff9b2d0a8fce9cb XMM03=000000000011cbf82c67c8bc2e329bc3 XMM04=74da6ee74eb1790400000000000ae988 XMM05=e4cb8bb95a7664b60000000000134fe0 XMM06=337ab6e513807abc0000000000133e48 XMM07=e042d86d42eb936e0000000000124390 XMM08=7b7d3f54a752174a000000000011cbf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000