syzkaller login: [ 30.563808] BUG: Bad rss-counter state mm:00000000177707f3 type:MM_FILEPAGES val:33 [ 30.564992] BUG: Bad rss-counter state mm:00000000177707f3 type:MM_ANONPAGES val:22 [ 30.609494] ================================================================== [ 30.610510] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.611450] Read of size 8 at addr ffff8880159943f8 by task sshd/220 [ 30.612258] [ 30.612476] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.613347] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.614325] Call Trace: [ 30.614643] [ 30.614932] dump_stack_lvl+0x91/0xf0 [ 30.615426] print_report+0xcc/0x620 [ 30.615918] ? __virt_addr_valid+0x102/0x340 [ 30.616497] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.617122] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.617745] kasan_report+0xbe/0xf0 [ 30.618223] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.618852] vma_interval_tree_remove+0xc75/0xec0 [ 30.619453] vma_prepare+0xc54/0x11a0 [ 30.619937] __split_vma+0x5af/0x950 [ 30.620415] ? __pfx___split_vma+0x10/0x10 [ 30.620944] ? find_held_lock+0x2c/0x110 [ 30.621463] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.622050] ? lock_is_held_type+0x9f/0x120 [ 30.622585] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.623168] ? mtree_range_walk+0x632/0x900 [ 30.623721] ? mas_walk+0x5c7/0x7c0 [ 30.624206] do_vmi_munmap+0x1f1/0x2b0 [ 30.624673] mmap_region+0x1f9/0x2660 [ 30.625133] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.625611] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.626283] ? __pfx_lock_acquire+0x10/0x10 [ 30.626782] ? __pfx_mmap_region+0x10/0x10 [ 30.627282] ? security_mmap_addr+0x7d/0xa0 [ 30.627789] ? get_unmapped_area+0x1f5/0x3f0 [ 30.628310] do_mmap+0x854/0xf00 [ 30.628724] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.629189] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.629713] ksys_mmap_pgoff+0x3af/0x500 [ 30.630188] do_syscall_64+0x3f/0x90 [ 30.630644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.631251] RIP: 0033:0x7ff9ea59bd82 [ 30.631683] 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 [ 30.633680] RSP: 002b:00007ffff426c8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.634530] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9ea59bd82 [ 30.635323] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff9e99d5000 [ 30.636137] RBP: 00007ff9e99d5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.636932] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606b6bb8ec0 [ 30.637725] R13: 00007ffff426c8d0 R14: 00007ffff426c900 R15: 00007ffff426cc60 [ 30.638527] [ 30.638803] [ 30.639010] Allocated by task 213: [ 30.639414] kasan_save_stack+0x22/0x50 [ 30.639892] kasan_set_track+0x25/0x30 [ 30.640367] __kasan_slab_alloc+0x59/0x70 [ 30.640867] kmem_cache_alloc+0x16b/0x370 [ 30.641348] vm_area_dup+0x20/0x160 [ 30.641793] __split_vma+0x170/0x950 [ 30.642249] split_vma+0xc6/0x110 [ 30.642662] mprotect_fixup+0x8d2/0xb30 [ 30.643136] do_mprotect_pkey+0x87e/0xd40 [ 30.643629] __x64_sys_mprotect+0x78/0xc0 [ 30.644131] do_syscall_64+0x3f/0x90 [ 30.644579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.645188] [ 30.645393] Freed by task 213: [ 30.645763] kasan_save_stack+0x22/0x50 [ 30.646239] kasan_set_track+0x25/0x30 [ 30.646706] kasan_save_free_info+0x2b/0x50 [ 30.647206] __kasan_slab_free+0x10a/0x190 [ 30.647712] kmem_cache_free+0x10d/0x4d0 [ 30.648196] rcu_core+0x8c8/0x2860 [ 30.648611] __do_softirq+0x1b7/0x7d4 [ 30.649062] [ 30.649265] Last potentially related work creation: [ 30.649811] kasan_save_stack+0x22/0x50 [ 30.650288] __kasan_record_aux_stack+0x8e/0xa0 [ 30.650828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.651499] remove_vma+0x139/0x170 [ 30.651924] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.652468] do_vmi_munmap+0x1f1/0x2b0 [ 30.652929] __vm_munmap+0x138/0x3a0 [ 30.653372] __x64_sys_munmap+0x59/0x80 [ 30.653842] do_syscall_64+0x3f/0x90 [ 30.654294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.654897] [ 30.655100] The buggy address belongs to the object at ffff8880159943a0 [ 30.655100] which belongs to the cache vm_area_struct of size 168 [ 30.656471] The buggy address is located 88 bytes inside of [ 30.656471] freed 168-byte region [ffff8880159943a0, ffff888015994448) [ 30.657788] [ 30.657992] The buggy address belongs to the physical page: [ 30.658606] page:00000000ac103ad0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15994 [ 30.659624] memcg:ffff888016682f01 [ 30.660036] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.660640] page_type: 0xffffffff() [ 30.661065] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.661930] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016682f01 [ 30.662786] page dumped because: kasan: bad access detected [ 30.663403] [ 30.663609] Memory state around the buggy address: [ 30.664171] ffff888015994280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.664975] ffff888015994300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.665781] >ffff888015994380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.666577] ^ [ 30.667368] ffff888015994400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.668174] ffff888015994480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.668968] ================================================================== [ 30.669884] Disabling lock debugging due to kernel taint [ 33.095328] BUG: Bad rss-counter state mm:0000000023e1b009 type:MM_FILEPAGES val:33 [ 33.096479] BUG: Bad rss-counter state mm:0000000023e1b009 type:MM_ANONPAGES val:22 [ 33.597455] BUG: Bad rss-counter state mm:0000000011f0a875 type:MM_FILEPAGES val:33 [ 33.598611] BUG: Bad rss-counter state mm:0000000011f0a875 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55131' (ECDSA) to the list of known hosts. 2023/06/20 17:09:37 fuzzer started 2023/06/20 17:09:38 dialing manager at localhost:36067 2023/06/20 17:09:38 checking machine... 2023/06/20 17:09:38 checking revisions... [ 34.288934] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:09:38 testing simple program... [ 34.345526] cgroup: Unknown subsys name 'net' [ 34.392705] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:09:37 Registers: info registers vcpu 0 RAX=ffffed1002deae8a RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801a2051c0 RSI=ffffffff83ab1b1f RDI=ffffffff8560b640 RBP=1ffff11002deae8a RSP=ffff888016f57440 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000009a4000009a4 R12=ffffffff8560b640 R13=ffffffff83ab1b1f R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff812d86b0 RFL=00000282 [--S----] 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 00007fcaeb5b3900 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=00007fcaebb6a618 CR3=000000000e4d2000 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=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff813acf6e RDX=1ffff110011c0fca RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888008e07dc8 RSP=ffff88806cf09df0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000078 R11=ffff88806cf09ff8 R12=0000000000000001 R13=ffff88806cf2c240 R14=ffff888008e07dc8 R15=dffffc0000000000 RIP=ffffffff814c0438 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 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=00007fef6d005e00 CR3=000000000c606000 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=3ff2e0743b8685b43945ea6214d88779 XMM02=0000000000119e68eff9b2d0a8fce9cb XMM03=0000000000119f382c67c8bc2e329bc3 XMM04=fe0060f9587fb26000000000000ae988 XMM05=19e9129bd510f23500000000001316a8 XMM06=4fda316b135da52b0000000000131530 XMM07=e042d86d42eb936e0000000000121ad8 XMM08=aeb9d0524e6b73110000000000119f38 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000