syzkaller login: [ 38.826827] BUG: Bad rss-counter state mm:00000000c6acc162 type:MM_FILEPAGES val:33 [ 38.828229] BUG: Bad rss-counter state mm:00000000c6acc162 type:MM_ANONPAGES val:22 [ 38.957952] ================================================================== [ 38.958874] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.959827] Read of size 8 at addr ffff88800ed405c8 by task sshd/219 [ 38.960599] [ 38.960833] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.961709] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.962727] Call Trace: [ 38.963075] [ 38.963367] dump_stack_lvl+0x91/0xf0 [ 38.963871] print_report+0xcc/0x620 [ 38.964368] ? __virt_addr_valid+0x102/0x340 [ 38.964939] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.965562] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.966204] kasan_report+0xbe/0xf0 [ 38.966681] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.967317] vma_interval_tree_remove+0xc75/0xec0 [ 38.967964] vma_prepare+0xc54/0x11a0 [ 38.968536] __split_vma+0x5af/0x950 [ 38.969108] ? __pfx___split_vma+0x10/0x10 [ 38.969734] ? find_held_lock+0x2c/0x110 [ 38.970391] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.971074] ? lock_is_held_type+0x9f/0x120 [ 38.971708] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.972429] ? mtree_range_walk+0x632/0x900 [ 38.973110] ? mas_walk+0x5c7/0x7c0 [ 38.973677] do_vmi_munmap+0x1f1/0x2b0 [ 38.974288] mmap_region+0x1f9/0x2660 [ 38.974867] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.975471] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.976328] ? __pfx_lock_acquire+0x10/0x10 [ 38.976970] ? __pfx_mmap_region+0x10/0x10 [ 38.977592] ? security_mmap_addr+0x7d/0xa0 [ 38.978262] ? get_unmapped_area+0x1f5/0x3f0 [ 38.978933] do_mmap+0x854/0xf00 [ 38.979448] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.980044] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.980704] ksys_mmap_pgoff+0x3af/0x500 [ 38.981311] do_syscall_64+0x3f/0x90 [ 38.981888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.982680] RIP: 0033:0x7f66b05dfd82 [ 38.983242] 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 [ 38.985766] RSP: 002b:00007ffd239b7dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.986880] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66b05dfd82 [ 38.987900] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66afa19000 [ 38.988908] RBP: 00007f66afa19000 R08: 0000000000000009 R09: 0000000000001000 [ 38.989913] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a4b435ec0 [ 38.990932] R13: 00007ffd239b7df0 R14: 00007ffd239b7e20 R15: 00007ffd239b8180 [ 38.991951] [ 38.992297] [ 38.992546] Allocated by task 212: [ 38.993074] kasan_save_stack+0x22/0x50 [ 38.993669] kasan_set_track+0x25/0x30 [ 38.994286] __kasan_slab_alloc+0x59/0x70 [ 38.994923] kmem_cache_alloc+0x16b/0x370 [ 38.995534] vm_area_dup+0x20/0x160 [ 38.996085] __split_vma+0x170/0x950 [ 38.996635] split_vma+0xc6/0x110 [ 38.997167] mprotect_fixup+0x8d2/0xb30 [ 38.997763] do_mprotect_pkey+0x87e/0xd40 [ 38.998416] __x64_sys_mprotect+0x78/0xc0 [ 38.999046] do_syscall_64+0x3f/0x90 [ 38.999608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.000393] [ 39.000650] Freed by task 203: [ 39.001125] kasan_save_stack+0x22/0x50 [ 39.001730] kasan_set_track+0x25/0x30 [ 39.002353] kasan_save_free_info+0x2b/0x50 [ 39.003005] __kasan_slab_free+0x10a/0x190 [ 39.003633] kmem_cache_free+0x10d/0x4d0 [ 39.004250] rcu_core+0x8c8/0x2860 [ 39.004775] __do_softirq+0x1b7/0x7d4 [ 39.005361] [ 39.005617] Last potentially related work creation: [ 39.006340] kasan_save_stack+0x22/0x50 [ 39.006953] __kasan_record_aux_stack+0x8e/0xa0 [ 39.007631] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.008420] remove_vma+0x139/0x170 [ 39.008975] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.009653] do_vmi_munmap+0x1f1/0x2b0 [ 39.010256] __vm_munmap+0x138/0x3a0 [ 39.010829] __x64_sys_munmap+0x59/0x80 [ 39.011426] do_syscall_64+0x3f/0x90 [ 39.012017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.012788] [ 39.013076] The buggy address belongs to the object at ffff88800ed40570 [ 39.013076] which belongs to the cache vm_area_struct of size 168 [ 39.014838] The buggy address is located 88 bytes inside of [ 39.014838] freed 168-byte region [ffff88800ed40570, ffff88800ed40618) [ 39.016494] [ 39.016755] The buggy address belongs to the physical page: [ 39.017536] page:00000000459ca4ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed40 [ 39.018862] memcg:ffff88800dc4f901 [ 39.019388] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.020192] page_type: 0xffffffff() [ 39.020736] raw: 0100000000000200 ffff8880087a0c80 ffffea0000389a40 dead000000000006 [ 39.021886] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc4f901 [ 39.023034] page dumped because: kasan: bad access detected [ 39.023860] [ 39.024123] Memory state around the buggy address: [ 39.024846] ffff88800ed40480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.025916] ffff88800ed40500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.027006] >ffff88800ed40580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.028069] ^ [ 39.028904] ffff88800ed40600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 39.030000] ffff88800ed40680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.031066] ================================================================== [ 39.032805] Disabling lock debugging due to kernel taint [ 41.410833] BUG: Bad rss-counter state mm:000000006d7e89df type:MM_FILEPAGES val:33 [ 41.412464] BUG: Bad rss-counter state mm:000000006d7e89df type:MM_ANONPAGES val:22 [ 41.861824] BUG: Bad rss-counter state mm:0000000059c554ea type:MM_FILEPAGES val:33 [ 41.863484] BUG: Bad rss-counter state mm:0000000059c554ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25404' (ECDSA) to the list of known hosts. 2023/06/21 00:29:51 fuzzer started 2023/06/21 00:29:51 dialing manager at localhost:36067 2023/06/21 00:29:52 checking machine... 2023/06/21 00:29:52 checking revisions... [ 42.584692] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:29:52 testing simple program... [ 42.647428] cgroup: Unknown subsys name 'net' [ 42.712245] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:29:51 Registers: info registers vcpu 0 RAX=ffff8880115b6eb0 RBX=ffff8880115be2c8 RCX=1ffff110022b7c60 RDX=dffffc0000000000 RSI=ffff888017ce7530 RDI=ffff8880115be300 RBP=ffff8880115be2d8 RSP=ffff88801a70fb88 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888017ce7488 R13=0000000000000000 R14=ffff88801815a3d8 R15=ffff88801815a390 RIP=ffffffff818476a0 RFL=00000046 [---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 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=00007fba2a663000 CR3=0000000017f7c000 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=756e696c2d34365f3638782f62696c2f XMM01=7470797263356b62696c2f756e672d78 XMM02=00332e6f732e6f7470797263356b6269 XMM03=6c2f756e672d78756e696c2d34365f36 XMM04=00000000000000000000000000000000 XMM05=00007fba2ab60f6000007fba2a943f30 XMM06=00007fba2a943a2000007fba2a943510 XMM07=00007fba2a94300000007fba2ab61a20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800e5785f0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800e5785f4 RBP=1ffff110011c6f87 RSP=ffff888008e37c30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000202 R13=ffff88800e578630 R14=ffffffff813782f8 R15=ffff88800d98f100 RIP=ffffffff812e0072 RFL=00000017 [----APC] 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=000055f47c4c1954 CR3=000000000f736000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000