syzkaller login: [ 38.778915] BUG: Bad rss-counter state mm:000000003f3cbca6 type:MM_FILEPAGES val:33 [ 38.780900] BUG: Bad rss-counter state mm:000000003f3cbca6 type:MM_ANONPAGES val:22 [ 38.930317] ================================================================== [ 38.931242] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.932181] Read of size 8 at addr ffff888016bef798 by task sshd/218 [ 38.932960] [ 38.933186] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.934198] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.935190] Call Trace: [ 38.935517] [ 38.935805] dump_stack_lvl+0x91/0xf0 [ 38.936301] print_report+0xcc/0x620 [ 38.936796] ? __virt_addr_valid+0x102/0x340 [ 38.937355] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.937989] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.938621] kasan_report+0xbe/0xf0 [ 38.939101] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.939739] vma_interval_tree_remove+0xc75/0xec0 [ 38.940384] vma_prepare+0xc54/0x11a0 [ 38.940873] __split_vma+0x5af/0x950 [ 38.941348] ? __pfx___split_vma+0x10/0x10 [ 38.941884] ? find_held_lock+0x2c/0x110 [ 38.942406] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.942982] ? lock_is_held_type+0x9f/0x120 [ 38.943526] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.944137] ? mtree_range_walk+0x632/0x900 [ 38.944697] ? mas_walk+0x5c7/0x7c0 [ 38.945186] do_vmi_munmap+0x1f1/0x2b0 [ 38.945688] mmap_region+0x1f9/0x2660 [ 38.946181] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.946701] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.947421] ? __pfx_lock_acquire+0x10/0x10 [ 38.947966] ? __pfx_mmap_region+0x10/0x10 [ 38.948512] ? security_mmap_addr+0x7d/0xa0 [ 38.949058] ? get_unmapped_area+0x1f5/0x3f0 [ 38.949632] do_mmap+0x854/0xf00 [ 38.950070] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.950575] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.951146] ksys_mmap_pgoff+0x3af/0x500 [ 38.951654] do_syscall_64+0x3f/0x90 [ 38.952138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.952815] RIP: 0033:0x7f63eac73d82 [ 38.953278] 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 [ 38.955415] RSP: 002b:00007ffd3197a2e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.956347] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63eac73d82 [ 38.957214] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63ea0ad000 [ 38.958093] RBP: 00007f63ea0ad000 R08: 0000000000000009 R09: 0000000000001000 [ 38.958990] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e78456ec0 [ 38.959890] R13: 00007ffd3197a300 R14: 00007ffd3197a330 R15: 00007ffd3197a690 [ 38.960817] [ 38.961121] [ 38.961343] Allocated by task 211: [ 38.961790] kasan_save_stack+0x22/0x50 [ 38.962320] kasan_set_track+0x25/0x30 [ 38.962836] __kasan_slab_alloc+0x59/0x70 [ 38.963378] kmem_cache_alloc+0x16b/0x370 [ 38.963922] vm_area_dup+0x20/0x160 [ 38.964403] __split_vma+0x170/0x950 [ 38.964892] split_vma+0xc6/0x110 [ 38.965349] mprotect_fixup+0x8d2/0xb30 [ 38.965883] do_mprotect_pkey+0x87e/0xd40 [ 38.966417] __x64_sys_mprotect+0x78/0xc0 [ 38.966967] do_syscall_64+0x3f/0x90 [ 38.967459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.968137] [ 38.968357] Freed by task 211: [ 38.968793] kasan_save_stack+0x22/0x50 [ 38.969323] kasan_set_track+0x25/0x30 [ 38.969840] kasan_save_free_info+0x2b/0x50 [ 38.970401] __kasan_slab_free+0x10a/0x190 [ 38.970965] kmem_cache_free+0x10d/0x4d0 [ 38.971500] rcu_core+0x8c8/0x2860 [ 38.971966] __do_softirq+0x1b7/0x7d4 [ 38.972471] [ 38.972693] Last potentially related work creation: [ 38.973306] kasan_save_stack+0x22/0x50 [ 38.973842] __kasan_record_aux_stack+0x8e/0xa0 [ 38.974438] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.975112] remove_vma+0x139/0x170 [ 38.975584] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.976173] do_vmi_munmap+0x1f1/0x2b0 [ 38.976685] __vm_munmap+0x138/0x3a0 [ 38.977175] __x64_sys_munmap+0x59/0x80 [ 38.977697] do_syscall_64+0x3f/0x90 [ 38.978199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.978877] [ 38.979101] The buggy address belongs to the object at ffff888016bef740 [ 38.979101] which belongs to the cache vm_area_struct of size 168 [ 38.980662] The buggy address is located 88 bytes inside of [ 38.980662] freed 168-byte region [ffff888016bef740, ffff888016bef7e8) [ 38.982142] [ 38.982366] The buggy address belongs to the physical page: [ 38.983052] page:0000000050751f9c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16bef [ 38.984204] memcg:ffff888016be9101 [ 38.984668] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.985348] page_type: 0xffffffff() [ 38.985827] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bf900 dead000000000008 [ 38.986788] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016be9101 [ 38.987747] page dumped because: kasan: bad access detected [ 38.988466] [ 38.988689] Memory state around the buggy address: [ 38.989296] ffff888016bef680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.990197] ffff888016bef700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.991098] >ffff888016bef780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.991996] ^ [ 38.992523] ffff888016bef800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.993434] ffff888016bef880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.994324] ================================================================== [ 38.995585] Disabling lock debugging due to kernel taint [ 40.662487] BUG: Bad rss-counter state mm:0000000002fdaba8 type:MM_FILEPAGES val:33 [ 40.663637] BUG: Bad rss-counter state mm:0000000002fdaba8 type:MM_ANONPAGES val:22 [ 41.220137] BUG: Bad rss-counter state mm:000000000c4b1e77 type:MM_FILEPAGES val:33 [ 41.221360] BUG: Bad rss-counter state mm:000000000c4b1e77 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45946' (ECDSA) to the list of known hosts. 2023/06/21 06:36:22 fuzzer started 2023/06/21 06:36:22 dialing manager at localhost:36067 2023/06/21 06:36:22 checking machine... 2023/06/21 06:36:22 checking revisions... [ 41.888299] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:36:22 testing simple program... [ 41.932330] cgroup: Unknown subsys name 'net' [ 41.975422] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:36:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=00007f0a868503ff RDX=0000564ea9fd9788 RSI=0000000000000001 RDI=0000000000000000 RBP=0000000000000058 RSP=00007f0a863cbd20 R8 =0000000000000000 R9 =0000564eabebce88 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=00007f0a78000b80 R14=0000564ea9fd9a50 R15=00007f0a8649f840 RIP=00007f0a8649ccc9 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0a863cc700 00000000 00000000 GS =0000 0000000000000000 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=00007f50b5301618 CR3=0000000018c18000 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=36333a3630203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732031323a3633 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343236 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 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=ffff888008c04400 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=00007f3d94bc3a30 CR3=000000000d99a000 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=4275e1bc06d424b7a4461be2314b1d16 XMM02=000000000011b028eff9b2d0a8fce9cb XMM03=000000000011b0f82c67c8bc2e329bc3 XMM04=8dc67f6e4825e15700000000000ae988 XMM05=751b9502027dc0b90000000000131530 XMM06=66e0a8173fdbadaa0000000000130708 XMM07=e042d86d42eb936e0000000000121d10 XMM08=c2c48c38e893da0a000000000011b0f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000