syzkaller login: [ 30.875919] BUG: Bad rss-counter state mm:000000007f278c73 type:MM_FILEPAGES val:33 [ 30.876930] BUG: Bad rss-counter state mm:000000007f278c73 type:MM_ANONPAGES val:22 [ 31.049754] ================================================================== [ 31.050835] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.052007] Read of size 8 at addr ffff88800e3ef880 by task sshd/219 [ 31.053003] [ 31.053269] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.054291] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.055513] Call Trace: [ 31.055923] [ 31.056220] dump_stack_lvl+0x91/0xf0 [ 31.056713] print_report+0xcc/0x620 [ 31.057198] ? __virt_addr_valid+0x102/0x340 [ 31.057755] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.058370] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.058993] kasan_report+0xbe/0xf0 [ 31.059500] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.060139] vma_interval_tree_remove+0xc75/0xec0 [ 31.060761] vma_prepare+0xc54/0x11a0 [ 31.061246] __split_vma+0x5af/0x950 [ 31.061720] ? __pfx___split_vma+0x10/0x10 [ 31.062256] ? find_held_lock+0x2c/0x110 [ 31.062770] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.063353] ? lock_is_held_type+0x9f/0x120 [ 31.063910] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.064550] ? mtree_range_walk+0x632/0x900 [ 31.065111] ? mas_walk+0x5c7/0x7c0 [ 31.065591] do_vmi_munmap+0x1f1/0x2b0 [ 31.066091] mmap_region+0x1f9/0x2660 [ 31.066585] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.067093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.067870] ? __pfx_lock_acquire+0x10/0x10 [ 31.068445] ? __pfx_mmap_region+0x10/0x10 [ 31.068987] ? security_mmap_addr+0x7d/0xa0 [ 31.069541] ? get_unmapped_area+0x1f5/0x3f0 [ 31.070088] do_mmap+0x854/0xf00 [ 31.070531] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.071035] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.071648] ksys_mmap_pgoff+0x3af/0x500 [ 31.072185] do_syscall_64+0x3f/0x90 [ 31.072683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.073380] RIP: 0033:0x7f7a2ca51d82 [ 31.073837] 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 [ 31.076025] RSP: 002b:00007ffda13314b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.076934] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a2ca51d82 [ 31.077825] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a2be8b000 [ 31.078703] RBP: 00007f7a2be8b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.079572] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592bcdb2ec0 [ 31.080435] R13: 00007ffda13314d0 R14: 00007ffda1331500 R15: 00007ffda1331860 [ 31.081356] [ 31.081656] [ 31.081873] Allocated by task 212: [ 31.082308] kasan_save_stack+0x22/0x50 [ 31.082823] kasan_set_track+0x25/0x30 [ 31.083323] __kasan_slab_alloc+0x59/0x70 [ 31.083869] kmem_cache_alloc+0x16b/0x370 [ 31.084404] vm_area_dup+0x20/0x160 [ 31.084874] __split_vma+0x170/0x950 [ 31.085376] split_vma+0xc6/0x110 [ 31.085820] mprotect_fixup+0x8d2/0xb30 [ 31.086318] do_mprotect_pkey+0x87e/0xd40 [ 31.086849] __x64_sys_mprotect+0x78/0xc0 [ 31.087392] do_syscall_64+0x3f/0x90 [ 31.087900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.088551] [ 31.088767] Freed by task 202: [ 31.089166] kasan_save_stack+0x22/0x50 [ 31.089672] kasan_set_track+0x25/0x30 [ 31.090161] kasan_save_free_info+0x2b/0x50 [ 31.090688] __kasan_slab_free+0x10a/0x190 [ 31.091260] kmem_cache_free+0x10d/0x4d0 [ 31.091788] rcu_core+0x8c8/0x2860 [ 31.092244] __do_softirq+0x1b7/0x7d4 [ 31.092736] [ 31.092952] Last potentially related work creation: [ 31.093566] kasan_save_stack+0x22/0x50 [ 31.094073] __kasan_record_aux_stack+0x8e/0xa0 [ 31.094646] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.095337] remove_vma+0x139/0x170 [ 31.095823] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.096379] do_vmi_munmap+0x1f1/0x2b0 [ 31.096870] __vm_munmap+0x138/0x3a0 [ 31.097337] __x64_sys_munmap+0x59/0x80 [ 31.097847] do_syscall_64+0x3f/0x90 [ 31.098327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.098972] [ 31.099217] The buggy address belongs to the object at ffff88800e3ef828 [ 31.099217] which belongs to the cache vm_area_struct of size 168 [ 31.100729] The buggy address is located 88 bytes inside of [ 31.100729] freed 168-byte region [ffff88800e3ef828, ffff88800e3ef8d0) [ 31.102143] [ 31.102356] The buggy address belongs to the physical page: [ 31.103015] page:00000000575e9b97 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3ef [ 31.104157] memcg:ffff888018d4d701 [ 31.104590] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.105300] page_type: 0xffffffff() [ 31.105756] raw: 0100000000000200 ffff8880087a0c80 ffffea0000359600 dead000000000007 [ 31.106677] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d4d701 [ 31.107631] page dumped because: kasan: bad access detected [ 31.108296] [ 31.108515] Memory state around the buggy address: [ 31.109098] ffff88800e3ef780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.109957] ffff88800e3ef800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.110828] >ffff88800e3ef880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.111753] ^ [ 31.112191] ffff88800e3ef900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.113056] ffff88800e3ef980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.113918] ================================================================== [ 31.114836] Disabling lock debugging due to kernel taint [ 33.042014] BUG: Bad rss-counter state mm:00000000b38f19ac type:MM_FILEPAGES val:33 [ 33.043190] BUG: Bad rss-counter state mm:00000000b38f19ac type:MM_ANONPAGES val:22 [ 33.490276] BUG: Bad rss-counter state mm:000000001c098b1d type:MM_FILEPAGES val:33 [ 33.491311] BUG: Bad rss-counter state mm:000000001c098b1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6598' (ECDSA) to the list of known hosts. 2023/06/20 22:26:41 fuzzer started 2023/06/20 22:26:41 dialing manager at localhost:36067 2023/06/20 22:26:41 checking machine... 2023/06/20 22:26:41 checking revisions... [ 34.184494] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:26:41 testing simple program... [ 34.237480] cgroup: Unknown subsys name 'net' [ 34.310154] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:26:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8450cc7f RCX=0000000000000001 RDX=1ffff11002069eb4 RSI=ffff88801034ff18 RDI=ffffffff8450cc7f RBP=ffffffff8450cc7f RSP=ffff88801034f4f8 R8 =0000000000000001 R9 =ffff88801034f588 R10=0000000000038001 R11=000000000008abe0 R12=0000000000000001 R13=0000000000000000 R14=ffff88800f281b40 R15=0000000000000014 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007fbf4ab66900 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=00007fbf4b11d618 CR3=00000000166d2000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007fb0f3e52ff0 CR3=00000000145d8000 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=fc3b000d0b19cfb7144e6cfe73f0ded7 XMM02=ec2efd57dc4c00df000000000011b908 XMM03=4d54157261fa8530000000000011b9d8 XMM04=32376c31c6b7d09000000000000ae988 XMM05=eb77f8a0363a59f50000000000133368 XMM06=806171799158d9670000000000132408 XMM07=e042d86d42eb936e0000000000122708 XMM08=4d54157261fa8530000000000011b9d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000