syzkaller login: [ 30.859324] BUG: Bad rss-counter state mm:0000000057d5988d type:MM_FILEPAGES val:33 [ 30.860366] BUG: Bad rss-counter state mm:0000000057d5988d type:MM_ANONPAGES val:22 [ 30.977347] ================================================================== [ 30.977994] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.978635] Read of size 8 at addr ffff88800d902058 by task sshd/222 [ 30.979164] [ 30.979311] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.979900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.980608] Call Trace: [ 30.980835] [ 30.981033] dump_stack_lvl+0x91/0xf0 [ 30.981374] print_report+0xcc/0x620 [ 30.981722] ? __virt_addr_valid+0x102/0x340 [ 30.982287] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.982713] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.983135] kasan_report+0xbe/0xf0 [ 30.983466] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.983889] vma_interval_tree_remove+0xc75/0xec0 [ 30.984364] vma_prepare+0xc54/0x11a0 [ 30.984719] __split_vma+0x5af/0x950 [ 30.985047] ? __pfx___split_vma+0x10/0x10 [ 30.985419] ? find_held_lock+0x2c/0x110 [ 30.985793] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.986184] ? lock_is_held_type+0x9f/0x120 [ 30.986550] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.986962] ? mtree_range_walk+0x632/0x900 [ 30.987340] ? mas_walk+0x5c7/0x7c0 [ 30.987672] do_vmi_munmap+0x1f1/0x2b0 [ 30.988011] mmap_region+0x1f9/0x2660 [ 30.988359] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.988705] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.989191] ? __pfx_lock_acquire+0x10/0x10 [ 30.989554] ? __pfx_mmap_region+0x10/0x10 [ 30.989912] ? security_mmap_addr+0x7d/0xa0 [ 30.990278] ? get_unmapped_area+0x1f5/0x3f0 [ 30.990654] do_mmap+0x854/0xf00 [ 30.990955] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.991300] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.991684] ksys_mmap_pgoff+0x3af/0x500 [ 30.992060] do_syscall_64+0x3f/0x90 [ 30.992417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.992870] RIP: 0033:0x7f53f2b48d82 [ 30.993199] 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 [ 30.994706] RSP: 002b:00007fff69d70528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.995335] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53f2b48d82 [ 30.995935] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53f1f82000 [ 30.996558] RBP: 00007f53f1f82000 R08: 0000000000000009 R09: 0000000000001000 [ 30.997150] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d22ac82b20 [ 30.997732] R13: 00007fff69d70540 R14: 00007fff69d70570 R15: 00007fff69d708d0 [ 30.998321] [ 30.998529] [ 30.998681] Allocated by task 215: [ 30.998974] kasan_save_stack+0x22/0x50 [ 30.999333] kasan_set_track+0x25/0x30 [ 30.999683] __kasan_slab_alloc+0x59/0x70 [ 31.000047] kmem_cache_alloc+0x16b/0x370 [ 31.000426] vm_area_dup+0x20/0x160 [ 31.000735] __split_vma+0x170/0x950 [ 31.001060] split_vma+0xc6/0x110 [ 31.001371] mprotect_fixup+0x8d2/0xb30 [ 31.001718] do_mprotect_pkey+0x87e/0xd40 [ 31.002083] __x64_sys_mprotect+0x78/0xc0 [ 31.002453] do_syscall_64+0x3f/0x90 [ 31.002788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.003235] [ 31.003385] Freed by task 215: [ 31.003654] kasan_save_stack+0x22/0x50 [ 31.003996] kasan_set_track+0x25/0x30 [ 31.004355] kasan_save_free_info+0x2b/0x50 [ 31.004718] __kasan_slab_free+0x10a/0x190 [ 31.005075] kmem_cache_free+0x10d/0x4d0 [ 31.005421] rcu_core+0x8c8/0x2860 [ 31.005721] __do_softirq+0x1b7/0x7d4 [ 31.006048] [ 31.006192] Last potentially related work creation: [ 31.006591] kasan_save_stack+0x22/0x50 [ 31.006941] __kasan_record_aux_stack+0x8e/0xa0 [ 31.007333] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.007776] remove_vma+0x139/0x170 [ 31.008083] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.008486] do_vmi_munmap+0x1f1/0x2b0 [ 31.008815] __vm_munmap+0x138/0x3a0 [ 31.009136] __x64_sys_munmap+0x59/0x80 [ 31.009476] do_syscall_64+0x3f/0x90 [ 31.009803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.010260] [ 31.010409] The buggy address belongs to the object at ffff88800d902000 [ 31.010409] which belongs to the cache vm_area_struct of size 168 [ 31.011451] The buggy address is located 88 bytes inside of [ 31.011451] freed 168-byte region [ffff88800d902000, ffff88800d9020a8) [ 31.012417] [ 31.012562] The buggy address belongs to the physical page: [ 31.013008] page:000000002d6b405d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd902 [ 31.013740] memcg:ffff88800d46a901 [ 31.014032] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.014499] page_type: 0xffffffff() [ 31.014815] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.015454] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d46a901 [ 31.016101] page dumped because: kasan: bad access detected [ 31.016569] [ 31.016715] Memory state around the buggy address: [ 31.017123] ffff88800d901f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.017710] ffff88800d901f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.018299] >ffff88800d902000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.018877] ^ [ 31.019368] ffff88800d902080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.019953] ffff88800d902100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.020580] ================================================================== [ 31.021303] Disabling lock debugging due to kernel taint [ 32.794690] BUG: Bad rss-counter state mm:000000007b67f62d type:MM_FILEPAGES val:33 [ 32.795375] BUG: Bad rss-counter state mm:000000007b67f62d type:MM_ANONPAGES val:22 [ 33.143966] BUG: Bad rss-counter state mm:00000000c1474e49 type:MM_FILEPAGES val:33 [ 33.144711] BUG: Bad rss-counter state mm:00000000c1474e49 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51552' (ECDSA) to the list of known hosts. 2023/06/21 08:44:17 fuzzer started 2023/06/21 08:44:17 dialing manager at localhost:36067 2023/06/21 08:44:17 checking machine... 2023/06/21 08:44:17 checking revisions... [ 33.680127] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:44:17 testing simple program... [ 33.720526] cgroup: Unknown subsys name 'net' [ 33.752855] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:44:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f8f7599fce0 CR3=000000000981e000 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=605c4acb1c788f82244cee1a1a882064 XMM02=000000000011b628eff9b2d0a8fce9cb XMM03=000000000011b6f82c67c8bc2e329bc3 XMM04=f0fdc1e86245f6b700000000000ae988 XMM05=59d5b690e0af863b0000000000132140 XMM06=037d472509a486410000000000130fa8 XMM07=e042d86d42eb936e00000000001225e8 XMM08=e1bcfa3ab1a511bd000000000011b6f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff811f7e83 RDX=0000000000001f7e RSI=0000000000001f7e RDI=ffffffff864f17e8 RBP=ffff88806cf09a98 RSP=ffff88806cf099d0 R8 =0000000000000000 R9 =ffff88806cf09a80 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09aa0 R13=ffff88806cf09a88 R14=ffff88806cf09a81 R15=ffff88806cf09a40 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007f4e0e793900 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=00007f4e0e75d008 CR3=000000000db52000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000