syzkaller login: [ 30.527795] BUG: Bad rss-counter state mm:0000000046d9d198 type:MM_FILEPAGES val:33 [ 30.528846] BUG: Bad rss-counter state mm:0000000046d9d198 type:MM_ANONPAGES val:22 [ 30.693445] ================================================================== [ 30.694421] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.695458] Read of size 8 at addr ffff8880159c8798 by task sshd/220 [ 30.696292] [ 30.696659] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.697846] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.698855] Call Trace: [ 30.699213] [ 30.699522] dump_stack_lvl+0x91/0xf0 [ 30.700028] print_report+0xcc/0x620 [ 30.700530] ? __virt_addr_valid+0x102/0x340 [ 30.701112] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.701758] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.702407] kasan_report+0xbe/0xf0 [ 30.702895] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.703509] vma_interval_tree_remove+0xc75/0xec0 [ 30.704063] vma_prepare+0xc54/0x11a0 [ 30.704659] __split_vma+0x5af/0x950 [ 30.705227] ? __pfx___split_vma+0x10/0x10 [ 30.705865] ? find_held_lock+0x2c/0x110 [ 30.706493] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.707201] ? lock_is_held_type+0x9f/0x120 [ 30.707871] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.708608] ? mtree_range_walk+0x632/0x900 [ 30.709271] ? mas_walk+0x5c7/0x7c0 [ 30.709840] do_vmi_munmap+0x1f1/0x2b0 [ 30.710432] mmap_region+0x1f9/0x2660 [ 30.711022] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.711634] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.712506] ? __pfx_lock_acquire+0x10/0x10 [ 30.713150] ? __pfx_mmap_region+0x10/0x10 [ 30.713789] ? security_mmap_addr+0x7d/0xa0 [ 30.714438] ? get_unmapped_area+0x1f5/0x3f0 [ 30.715122] do_mmap+0x854/0xf00 [ 30.715654] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.716247] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.716934] ksys_mmap_pgoff+0x3af/0x500 [ 30.717537] do_syscall_64+0x3f/0x90 [ 30.718110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.718887] RIP: 0033:0x7f91b6211d82 [ 30.719457] 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 [ 30.721807] RSP: 002b:00007fff3abcbdc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.722696] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91b6211d82 [ 30.723543] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91b564b000 [ 30.724363] RBP: 00007f91b564b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.725184] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624cca12ec0 [ 30.726019] R13: 00007fff3abcbde0 R14: 00007fff3abcbe10 R15: 00007fff3abcc170 [ 30.726854] [ 30.727162] [ 30.727374] Allocated by task 213: [ 30.727793] kasan_save_stack+0x22/0x50 [ 30.728285] kasan_set_track+0x25/0x30 [ 30.728768] __kasan_slab_alloc+0x59/0x70 [ 30.729280] kmem_cache_alloc+0x16b/0x370 [ 30.729801] vm_area_dup+0x20/0x160 [ 30.730243] __split_vma+0x170/0x950 [ 30.730699] split_vma+0xc6/0x110 [ 30.731155] mprotect_fixup+0x8d2/0xb30 [ 30.731639] do_mprotect_pkey+0x87e/0xd40 [ 30.732147] __x64_sys_mprotect+0x78/0xc0 [ 30.732660] do_syscall_64+0x3f/0x90 [ 30.733135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.733759] [ 30.733968] Freed by task 213: [ 30.734352] kasan_save_stack+0x22/0x50 [ 30.734834] kasan_set_track+0x25/0x30 [ 30.735346] kasan_save_free_info+0x2b/0x50 [ 30.735884] __kasan_slab_free+0x10a/0x190 [ 30.736415] kmem_cache_free+0x10d/0x4d0 [ 30.736917] rcu_core+0x8c8/0x2860 [ 30.737352] __do_softirq+0x1b7/0x7d4 [ 30.737817] [ 30.738030] Last potentially related work creation: [ 30.738643] kasan_save_stack+0x22/0x50 [ 30.739167] __kasan_record_aux_stack+0x8e/0xa0 [ 30.739727] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.740365] remove_vma+0x139/0x170 [ 30.740803] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.741347] do_vmi_munmap+0x1f1/0x2b0 [ 30.741819] __vm_munmap+0x138/0x3a0 [ 30.742275] __x64_sys_munmap+0x59/0x80 [ 30.742767] do_syscall_64+0x3f/0x90 [ 30.743230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.743866] [ 30.744079] The buggy address belongs to the object at ffff8880159c8740 [ 30.744079] which belongs to the cache vm_area_struct of size 168 [ 30.745512] The buggy address is located 88 bytes inside of [ 30.745512] freed 168-byte region [ffff8880159c8740, ffff8880159c87e8) [ 30.746871] [ 30.747106] The buggy address belongs to the physical page: [ 30.747752] page:000000007da72d3d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159c8 [ 30.748816] memcg:ffff88800fe91f01 [ 30.749230] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.749860] page_type: 0xffffffff() [ 30.750301] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.751221] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe91f01 [ 30.752098] page dumped because: kasan: bad access detected [ 30.752745] [ 30.752954] Memory state around the buggy address: [ 30.753525] ffff8880159c8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.754351] ffff8880159c8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.755196] >ffff8880159c8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.756046] ^ [ 30.756524] ffff8880159c8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.757362] ffff8880159c8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.758188] ================================================================== [ 30.759135] Disabling lock debugging due to kernel taint [ 32.941121] BUG: Bad rss-counter state mm:00000000d9727e46 type:MM_FILEPAGES val:33 [ 32.942572] BUG: Bad rss-counter state mm:00000000d9727e46 type:MM_ANONPAGES val:22 [ 33.376944] BUG: Bad rss-counter state mm:00000000d0bc5581 type:MM_FILEPAGES val:33 [ 33.377959] BUG: Bad rss-counter state mm:00000000d0bc5581 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59527' (ECDSA) to the list of known hosts. 2023/06/21 02:25:17 fuzzer started 2023/06/21 02:25:17 dialing manager at localhost:36067 2023/06/21 02:25:17 checking machine... 2023/06/21 02:25:17 checking revisions... [ 34.143397] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:25:18 testing simple program... [ 34.191769] cgroup: Unknown subsys name 'net' [ 34.249715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:25:17 Registers: info registers vcpu 0 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff8364444a RDX=dffffc0000000000 RSI=0000000000026444 RDI=ffff88800f1579a0 RBP=ffff88800f1579f8 RSP=ffff88800f157930 R8 =0000000000000001 R9 =ffff88800f1579e0 R10=0000000000038001 R11=00000000000391b0 R12=ffff88800f157a00 R13=ffff88800f1579e8 R14=ffff88800f1579e1 R15=ffff88800f1579a0 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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 00007fa8471a5900 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=00007ffe95f8b000 CR3=000000000f004000 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=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 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=00007f76b9c13f30 CR3=000000000c9b0000 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=e6349782d72bb4b80b428885e21f7a0c XMM02=000000000011a478ec2efd57dc4c00df XMM03=00000000001219f0e3eefac322145a41 XMM04=cc1e759fd8dd19b600000000000ae988 XMM05=19e9129bd510f2350000000000131818 XMM06=4fda316b135da52b00000000001316a0 XMM07=e042d86d42eb936e0000000000121c70 XMM08=e3eefac322145a41000000000011a4d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000