syzkaller login: [ 38.777283] BUG: Bad rss-counter state mm:00000000f1cc1d06 type:MM_FILEPAGES val:33 [ 38.778494] BUG: Bad rss-counter state mm:00000000f1cc1d06 type:MM_ANONPAGES val:22 [ 39.009043] ================================================================== [ 39.010115] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.011258] Read of size 8 at addr ffff888019f7d140 by task sshd/220 [ 39.012316] [ 39.012540] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.013405] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.014397] Call Trace: [ 39.014731] [ 39.015021] dump_stack_lvl+0x91/0xf0 [ 39.015530] print_report+0xcc/0x620 [ 39.016014] ? __virt_addr_valid+0x102/0x340 [ 39.016570] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.017198] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.017822] kasan_report+0xbe/0xf0 [ 39.018301] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.018916] vma_interval_tree_remove+0xc75/0xec0 [ 39.019530] vma_prepare+0xc54/0x11a0 [ 39.020011] __split_vma+0x5af/0x950 [ 39.020490] ? __pfx___split_vma+0x10/0x10 [ 39.021017] ? find_held_lock+0x2c/0x110 [ 39.021547] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.022111] ? lock_is_held_type+0x9f/0x120 [ 39.022657] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.023282] ? mtree_range_walk+0x632/0x900 [ 39.023835] ? mas_walk+0x5c7/0x7c0 [ 39.024316] do_vmi_munmap+0x1f1/0x2b0 [ 39.024804] mmap_region+0x1f9/0x2660 [ 39.025286] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.025803] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.026513] ? __pfx_lock_acquire+0x10/0x10 [ 39.027045] ? __pfx_mmap_region+0x10/0x10 [ 39.027593] ? security_mmap_addr+0x7d/0xa0 [ 39.028128] ? get_unmapped_area+0x1f5/0x3f0 [ 39.028678] do_mmap+0x854/0xf00 [ 39.029121] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.029613] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.030181] ksys_mmap_pgoff+0x3af/0x500 [ 39.030695] do_syscall_64+0x3f/0x90 [ 39.031197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.031851] RIP: 0033:0x7fc5c323fd82 [ 39.032307] 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 [ 39.034435] RSP: 002b:00007ffe86ce6f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.035353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5c323fd82 [ 39.036205] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5c2679000 [ 39.037051] RBP: 00007fc5c2679000 R08: 0000000000000009 R09: 0000000000001000 [ 39.037897] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561816b69ec0 [ 39.038743] R13: 00007ffe86ce6f90 R14: 00007ffe86ce6fc0 R15: 00007ffe86ce7320 [ 39.039605] [ 39.039898] [ 39.040115] Allocated by task 213: [ 39.040546] kasan_save_stack+0x22/0x50 [ 39.041052] kasan_set_track+0x25/0x30 [ 39.041559] __kasan_slab_alloc+0x59/0x70 [ 39.042079] kmem_cache_alloc+0x16b/0x370 [ 39.042597] vm_area_dup+0x20/0x160 [ 39.043054] __split_vma+0x170/0x950 [ 39.043548] split_vma+0xc6/0x110 [ 39.043989] mprotect_fixup+0x8d2/0xb30 [ 39.044492] do_mprotect_pkey+0x87e/0xd40 [ 39.045010] __x64_sys_mprotect+0x78/0xc0 [ 39.045527] do_syscall_64+0x3f/0x90 [ 39.046001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.046644] [ 39.046867] Freed by task 213: [ 39.047273] kasan_save_stack+0x22/0x50 [ 39.047784] kasan_set_track+0x25/0x30 [ 39.048279] kasan_save_free_info+0x2b/0x50 [ 39.048816] __kasan_slab_free+0x10a/0x190 [ 39.049360] kmem_cache_free+0x10d/0x4d0 [ 39.049870] rcu_core+0x8c8/0x2860 [ 39.050312] __do_softirq+0x1b7/0x7d4 [ 39.050787] [ 39.051011] Last potentially related work creation: [ 39.051607] kasan_save_stack+0x22/0x50 [ 39.052112] __kasan_record_aux_stack+0x8e/0xa0 [ 39.052686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.053329] remove_vma+0x139/0x170 [ 39.053786] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.054353] do_vmi_munmap+0x1f1/0x2b0 [ 39.054849] __vm_munmap+0x138/0x3a0 [ 39.055338] __x64_sys_munmap+0x59/0x80 [ 39.055834] do_syscall_64+0x3f/0x90 [ 39.056307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.056953] [ 39.057171] The buggy address belongs to the object at ffff888019f7d0e8 [ 39.057171] which belongs to the cache vm_area_struct of size 168 [ 39.058635] The buggy address is located 88 bytes inside of [ 39.058635] freed 168-byte region [ffff888019f7d0e8, ffff888019f7d190) [ 39.060041] [ 39.060260] The buggy address belongs to the physical page: [ 39.060916] page:000000006d82918f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f7d [ 39.062007] memcg:ffff88800dcd1c01 [ 39.062427] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.063086] page_type: 0xffffffff() [ 39.063543] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.064464] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcd1c01 [ 39.065368] page dumped because: kasan: bad access detected [ 39.066035] [ 39.066252] Memory state around the buggy address: [ 39.066833] ffff888019f7d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.067698] ffff888019f7d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.068555] >ffff888019f7d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.069409] ^ [ 39.070038] ffff888019f7d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.070893] ffff888019f7d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.071757] ================================================================== [ 39.072936] Disabling lock debugging due to kernel taint [ 40.894211] BUG: Bad rss-counter state mm:00000000ee394f79 type:MM_FILEPAGES val:33 [ 40.895016] BUG: Bad rss-counter state mm:00000000ee394f79 type:MM_ANONPAGES val:22 [ 41.412421] BUG: Bad rss-counter state mm:000000002b5692a6 type:MM_FILEPAGES val:33 [ 41.413709] BUG: Bad rss-counter state mm:000000002b5692a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13464' (ECDSA) to the list of known hosts. 2023/06/21 04:17:23 fuzzer started 2023/06/21 04:17:23 dialing manager at localhost:36067 2023/06/21 04:17:23 checking machine... 2023/06/21 04:17:23 checking revisions... [ 42.192566] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:17:23 testing simple program... [ 42.239519] cgroup: Unknown subsys name 'net' [ 42.296051] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:17:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ef5a000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff88800ef5a000 RDI=ffff888019a0f8c0 RBP=ffff888019a0f8c0 RSP=ffff88800f027d78 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff85b76b00 R13=0000000000000000 R14=ffffffff87f97640 R15=0000000000000001 RIP=ffffffff8364a1b6 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 00007f7b7d38f900 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=00007fff9a221000 CR3=000000000e79c000 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=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 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=00007f2ed88d08d0 CR3=000000000d7ba000 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=c0e8d3cb647ab59335462d5e39de5c1a XMM02=ec2efd57dc4c00df000000000011ad10 XMM03=673d55d10c126c64000000000011ade0 XMM04=201d724c178ae35900000000000ae988 XMM05=e4cb8bb95a7664b600000000001312c8 XMM06=8d01c1645caa04b700000000001304a0 XMM07=e042d86d42eb936e00000000001219a0 XMM08=673d55d10c126c64000000000011ade0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000