syzkaller login: [ 34.604209] BUG: Bad rss-counter state mm:00000000bb1d6f7f type:MM_FILEPAGES val:33 [ 34.605443] BUG: Bad rss-counter state mm:00000000bb1d6f7f type:MM_ANONPAGES val:22 [ 34.655930] ================================================================== [ 34.656788] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.657749] Read of size 8 at addr ffff88800d88a6b0 by task sshd/220 [ 34.658631] [ 34.658928] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.659740] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.660661] Call Trace: [ 34.660990] [ 34.661261] dump_stack_lvl+0x91/0xf0 [ 34.661726] print_report+0xcc/0x620 [ 34.662183] ? __virt_addr_valid+0x102/0x340 [ 34.662708] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.663294] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.663882] kasan_report+0xbe/0xf0 [ 34.664335] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.664933] vma_interval_tree_remove+0xc75/0xec0 [ 34.665511] vma_prepare+0xc54/0x11a0 [ 34.665997] __split_vma+0x5af/0x950 [ 34.666629] ? __pfx___split_vma+0x10/0x10 [ 34.667160] ? find_held_lock+0x2c/0x110 [ 34.667686] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.668255] ? lock_is_held_type+0x9f/0x120 [ 34.668799] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.669432] ? mtree_range_walk+0x632/0x900 [ 34.669971] ? mas_walk+0x5c7/0x7c0 [ 34.670437] do_vmi_munmap+0x1f1/0x2b0 [ 34.670917] mmap_region+0x1f9/0x2660 [ 34.671404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.671906] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.672620] ? __pfx_lock_acquire+0x10/0x10 [ 34.673165] ? __pfx_mmap_region+0x10/0x10 [ 34.673688] ? security_mmap_addr+0x7d/0xa0 [ 34.674214] ? get_unmapped_area+0x1f5/0x3f0 [ 34.674753] do_mmap+0x854/0xf00 [ 34.675194] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.675694] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.676256] ksys_mmap_pgoff+0x3af/0x500 [ 34.676767] do_syscall_64+0x3f/0x90 [ 34.677253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.677896] RIP: 0033:0x7f0575246d82 [ 34.678345] 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 [ 34.680491] RSP: 002b:00007fffe822fce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.681413] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0575246d82 [ 34.682283] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0574680000 [ 34.683130] RBP: 00007f0574680000 R08: 0000000000000009 R09: 0000000000001000 [ 34.683984] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b281b13ec0 [ 34.684840] R13: 00007fffe822fd00 R14: 00007fffe822fd30 R15: 00007fffe8230090 [ 34.685706] [ 34.685996] [ 34.686214] Allocated by task 213: [ 34.686646] kasan_save_stack+0x22/0x50 [ 34.687156] kasan_set_track+0x25/0x30 [ 34.687648] __kasan_slab_alloc+0x59/0x70 [ 34.688167] kmem_cache_alloc+0x16b/0x370 [ 34.688677] vm_area_dup+0x20/0x160 [ 34.689131] __split_vma+0x170/0x950 [ 34.689593] split_vma+0xc6/0x110 [ 34.690033] mprotect_fixup+0x8d2/0xb30 [ 34.690523] do_mprotect_pkey+0x87e/0xd40 [ 34.691035] __x64_sys_mprotect+0x78/0xc0 [ 34.691555] do_syscall_64+0x3f/0x90 [ 34.692022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.692649] [ 34.692859] Freed by task 213: [ 34.693281] kasan_save_stack+0x22/0x50 [ 34.693783] kasan_set_track+0x25/0x30 [ 34.694279] kasan_save_free_info+0x2b/0x50 [ 34.694808] __kasan_slab_free+0x10a/0x190 [ 34.695331] kmem_cache_free+0x10d/0x4d0 [ 34.695837] rcu_core+0x8c8/0x2860 [ 34.696281] __do_softirq+0x1b7/0x7d4 [ 34.696760] [ 34.696990] Last potentially related work creation: [ 34.697577] kasan_save_stack+0x22/0x50 [ 34.698066] __kasan_record_aux_stack+0x8e/0xa0 [ 34.698629] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.699271] remove_vma+0x139/0x170 [ 34.699718] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.700282] do_vmi_munmap+0x1f1/0x2b0 [ 34.700769] __vm_munmap+0x138/0x3a0 [ 34.701257] __x64_sys_munmap+0x59/0x80 [ 34.701749] do_syscall_64+0x3f/0x90 [ 34.702213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.702861] [ 34.703082] The buggy address belongs to the object at ffff88800d88a658 [ 34.703082] which belongs to the cache vm_area_struct of size 168 [ 34.704572] The buggy address is located 88 bytes inside of [ 34.704572] freed 168-byte region [ffff88800d88a658, ffff88800d88a700) [ 34.705997] [ 34.706212] The buggy address belongs to the physical page: [ 34.706877] page:0000000058e609aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd88a [ 34.708069] memcg:ffff88800db5ae01 [ 34.708500] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.709161] page_type: 0xffffffff() [ 34.709612] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.710544] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db5ae01 [ 34.711451] page dumped because: kasan: bad access detected [ 34.712120] [ 34.712333] Memory state around the buggy address: [ 34.712927] ffff88800d88a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.713779] ffff88800d88a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.714641] >ffff88800d88a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.715497] ^ [ 34.716089] ffff88800d88a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.716957] ffff88800d88a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.717808] ================================================================== [ 34.718743] Disabling lock debugging due to kernel taint [ 36.691391] BUG: Bad rss-counter state mm:0000000079da71cb type:MM_FILEPAGES val:33 [ 36.692410] BUG: Bad rss-counter state mm:0000000079da71cb type:MM_ANONPAGES val:22 [ 37.169928] BUG: Bad rss-counter state mm:00000000af261c89 type:MM_FILEPAGES val:33 [ 37.170910] BUG: Bad rss-counter state mm:00000000af261c89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19230' (ECDSA) to the list of known hosts. 2023/06/19 19:46:02 fuzzer started 2023/06/19 19:46:02 dialing manager at localhost:44161 2023/06/19 19:46:02 checking machine... 2023/06/19 19:46:02 checking revisions... [ 37.913190] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:46:03 testing simple program... [ 37.967664] cgroup: Unknown subsys name 'net' [ 38.009775] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:45:59 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff861374ba RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880102ff3c8 RSP=ffff8880102ff300 R8 =ffffffff861374be R9 =ffff8880102ff3b0 R10=0000000000038001 R11=0000000000020d78 R12=ffff8880102ff3d0 R13=ffff8880102ff3b8 R14=ffff8880102ff3b1 R15=ffff8880102ff370 RIP=ffffffff81130ac8 RFL=00000202 [-------] 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 00007f1f1b739900 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=00007f1f1bcf0618 CR3=0000000016a20000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2e629ede90 CR3=00000000099e4000 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=a460cf6eb070168c8d4f2f94d4888b7d XMM02=000000000011e4b0eff9b2d0a8fce9cb XMM03=000000000011e5802c67c8bc2e329bc3 XMM04=069f2c683800d44300000000000ae988 XMM05=19e9129bd510f2350000000000134058 XMM06=4fda316b135da52b0000000000133ee0 XMM07=e042d86d42eb936e0000000000124a00 XMM08=32bb37f70c6837d2000000000011e580 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000