syzkaller login: [ 38.958753] BUG: Bad rss-counter state mm:0000000056e7c27a type:MM_FILEPAGES val:33 [ 38.959994] BUG: Bad rss-counter state mm:0000000056e7c27a type:MM_ANONPAGES val:22 [ 39.001915] ================================================================== [ 39.003200] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.004561] Read of size 8 at addr ffff88800e246a50 by task sshd/220 [ 39.005560] [ 39.005901] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.007018] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.008311] Call Trace: [ 39.008687] [ 39.009027] dump_stack_lvl+0x91/0xf0 [ 39.009626] print_report+0xcc/0x620 [ 39.010207] ? __virt_addr_valid+0x102/0x340 [ 39.011010] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.011747] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.012625] kasan_report+0xbe/0xf0 [ 39.013177] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.013952] vma_interval_tree_remove+0xc75/0xec0 [ 39.014679] vma_prepare+0xc54/0x11a0 [ 39.015251] __split_vma+0x5af/0x950 [ 39.015852] ? __pfx___split_vma+0x10/0x10 [ 39.016410] ? find_held_lock+0x2c/0x110 [ 39.016964] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.017592] ? lock_is_held_type+0x9f/0x120 [ 39.018179] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.018850] ? mtree_range_walk+0x632/0x900 [ 39.019453] ? mas_walk+0x5c7/0x7c0 [ 39.019954] do_vmi_munmap+0x1f1/0x2b0 [ 39.020478] mmap_region+0x1f9/0x2660 [ 39.020989] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.021525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.022315] ? __pfx_lock_acquire+0x10/0x10 [ 39.022890] ? __pfx_mmap_region+0x10/0x10 [ 39.023473] ? security_mmap_addr+0x7d/0xa0 [ 39.024047] ? get_unmapped_area+0x1f5/0x3f0 [ 39.024639] do_mmap+0x854/0xf00 [ 39.025100] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.025633] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.026228] ksys_mmap_pgoff+0x3af/0x500 [ 39.026764] do_syscall_64+0x3f/0x90 [ 39.027298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.027978] RIP: 0033:0x7f2d519dad82 [ 39.028465] 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 [ 39.030760] RSP: 002b:00007ffe606c5b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.031718] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d519dad82 [ 39.032655] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d50e14000 [ 39.033574] RBP: 00007f2d50e14000 R08: 0000000000000009 R09: 0000000000001000 [ 39.034526] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a2689fd90 [ 39.035417] R13: 00007ffe606c5b40 R14: 00007ffe606c5b70 R15: 00007ffe606c5ed0 [ 39.036322] [ 39.036632] [ 39.036858] Allocated by task 213: [ 39.037309] kasan_save_stack+0x22/0x50 [ 39.037861] kasan_set_track+0x25/0x30 [ 39.038381] __kasan_slab_alloc+0x59/0x70 [ 39.038933] kmem_cache_alloc+0x16b/0x370 [ 39.039479] vm_area_dup+0x20/0x160 [ 39.039962] __split_vma+0x170/0x950 [ 39.040456] split_vma+0xc6/0x110 [ 39.040924] mprotect_fixup+0x8d2/0xb30 [ 39.041451] do_mprotect_pkey+0x87e/0xd40 [ 39.042027] __x64_sys_mprotect+0x78/0xc0 [ 39.042572] do_syscall_64+0x3f/0x90 [ 39.043073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.043757] [ 39.043982] Freed by task 211: [ 39.044401] kasan_save_stack+0x22/0x50 [ 39.044933] kasan_set_track+0x25/0x30 [ 39.045453] kasan_save_free_info+0x2b/0x50 [ 39.046027] __kasan_slab_free+0x10a/0x190 [ 39.046586] kmem_cache_free+0x10d/0x4d0 [ 39.047197] rcu_core+0x8c8/0x2860 [ 39.047664] __do_softirq+0x1b7/0x7d4 [ 39.048169] [ 39.048400] Last potentially related work creation: [ 39.049019] kasan_save_stack+0x22/0x50 [ 39.049553] __kasan_record_aux_stack+0x8e/0xa0 [ 39.050184] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.050865] remove_vma+0x139/0x170 [ 39.051342] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.051933] do_vmi_munmap+0x1f1/0x2b0 [ 39.052445] __vm_munmap+0x138/0x3a0 [ 39.052944] __x64_sys_munmap+0x59/0x80 [ 39.053471] do_syscall_64+0x3f/0x90 [ 39.053984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.054662] [ 39.054890] The buggy address belongs to the object at ffff88800e2469f8 [ 39.054890] which belongs to the cache vm_area_struct of size 168 [ 39.056437] The buggy address is located 88 bytes inside of [ 39.056437] freed 168-byte region [ffff88800e2469f8, ffff88800e246aa0) [ 39.057933] [ 39.058162] The buggy address belongs to the physical page: [ 39.058862] page:000000001cd74bae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe246 [ 39.060010] memcg:ffff88800dd95a01 [ 39.060461] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.061198] page_type: 0xffffffff() [ 39.061696] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b8140 dead000000000007 [ 39.062663] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd95a01 [ 39.063623] page dumped because: kasan: bad access detected [ 39.064317] [ 39.064549] Memory state around the buggy address: [ 39.065157] ffff88800e246900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.066070] ffff88800e246980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.066971] >ffff88800e246a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.067887] ^ [ 39.068617] ffff88800e246a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.069515] ffff88800e246b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.070418] ================================================================== [ 39.071468] Disabling lock debugging due to kernel taint [ 41.048034] BUG: Bad rss-counter state mm:0000000026633f87 type:MM_FILEPAGES val:33 [ 41.049047] BUG: Bad rss-counter state mm:0000000026633f87 type:MM_ANONPAGES val:22 [ 41.543870] BUG: Bad rss-counter state mm:0000000087e0a6b9 type:MM_FILEPAGES val:33 [ 41.544885] BUG: Bad rss-counter state mm:0000000087e0a6b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60188' (ECDSA) to the list of known hosts. 2023/06/20 19:18:17 fuzzer started 2023/06/20 19:18:17 dialing manager at localhost:36067 2023/06/20 19:18:17 checking machine... 2023/06/20 19:18:17 checking revisions... [ 42.300226] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:18:17 testing simple program... [ 42.363357] cgroup: Unknown subsys name 'net' [ 42.416448] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:18:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff11002c17e8e RDX=dffffc0000000000 RSI=ffffffff81809add RDI=ffff8880160bf418 RBP=ffff8880160bf470 RSP=ffff8880160bf3a8 R8 =0000000000000001 R9 =ffff8880160bf458 R10=0000000000038001 R11=0000000000020db7 R12=ffff8880160bf478 R13=ffff8880160bf460 R14=ffff8880160bf459 R15=ffff8880160bf418 RIP=ffffffff81130706 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 00007f04028b5900 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=00007f0402e6c618 CR3=000000000ff7e000 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=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=0000000080000000 RBX=0000000000000000 RCX=ffffffff81632520 RDX=ffff888016ce0000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800951a170 RSP=ffff888016f17bc0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=ffffea0000200f00 R13=dffffc0000000000 R14=0000000000000000 R15=ffff888016f17d90 RIP=ffffffff814c086b 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 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=00007f14683e4178 CR3=000000000ebc6000 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=2e6f732e347a6c62696c2f756e672d78 XMM02=00312e6f732e347a6c62696c2f756e67 XMM03=2d78756e696c2d34365f3638782f6269 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000