syzkaller login: [ 29.825136] BUG: Bad rss-counter state mm:000000002de9912f type:MM_FILEPAGES val:33 [ 29.825821] BUG: Bad rss-counter state mm:000000002de9912f type:MM_ANONPAGES val:22 [ 29.955072] ================================================================== [ 29.955734] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.956401] Read of size 8 at addr ffff88801699cc20 by task sshd/219 [ 29.956884] [ 29.957023] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.957550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.958162] Call Trace: [ 29.958373] [ 29.958557] dump_stack_lvl+0x91/0xf0 [ 29.958876] print_report+0xcc/0x620 [ 29.959191] ? __virt_addr_valid+0x102/0x340 [ 29.959686] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.960093] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.960521] kasan_report+0xbe/0xf0 [ 29.960843] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.961262] vma_interval_tree_remove+0xc75/0xec0 [ 29.961696] vma_prepare+0xc54/0x11a0 [ 29.961998] __split_vma+0x5af/0x950 [ 29.962296] ? __pfx___split_vma+0x10/0x10 [ 29.962625] ? find_held_lock+0x2c/0x110 [ 29.962956] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.963313] ? lock_is_held_type+0x9f/0x120 [ 29.963658] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.964046] ? mtree_range_walk+0x632/0x900 [ 29.964456] ? mas_walk+0x5c7/0x7c0 [ 29.964768] do_vmi_munmap+0x1f1/0x2b0 [ 29.965083] mmap_region+0x1f9/0x2660 [ 29.965392] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.965714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.966155] ? __pfx_lock_acquire+0x10/0x10 [ 29.966487] ? __pfx_mmap_region+0x10/0x10 [ 29.966828] ? security_mmap_addr+0x7d/0xa0 [ 29.967190] ? get_unmapped_area+0x1f5/0x3f0 [ 29.967536] do_mmap+0x854/0xf00 [ 29.967810] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.968132] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.968522] ksys_mmap_pgoff+0x3af/0x500 [ 29.968857] do_syscall_64+0x3f/0x90 [ 29.969174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.969586] RIP: 0033:0x7f8467709d82 [ 29.969884] 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 [ 29.971315] RSP: 002b:00007ffcaa4477b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.971907] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8467709d82 [ 29.972474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8466b43000 [ 29.973006] RBP: 00007f8466b43000 R08: 0000000000000009 R09: 0000000000001000 [ 29.973537] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f569ffcd90 [ 29.974077] R13: 00007ffcaa4477d0 R14: 00007ffcaa447800 R15: 00007ffcaa447b60 [ 29.974631] [ 29.974824] [ 29.974964] Allocated by task 212: [ 29.975244] kasan_save_stack+0x22/0x50 [ 29.975594] kasan_set_track+0x25/0x30 [ 29.975909] __kasan_slab_alloc+0x59/0x70 [ 29.976240] kmem_cache_alloc+0x16b/0x370 [ 29.976590] vm_area_dup+0x20/0x160 [ 29.976879] __split_vma+0x170/0x950 [ 29.977171] split_vma+0xc6/0x110 [ 29.977456] mprotect_fixup+0x8d2/0xb30 [ 29.977781] do_mprotect_pkey+0x87e/0xd40 [ 29.978121] __x64_sys_mprotect+0x78/0xc0 [ 29.978458] do_syscall_64+0x3f/0x90 [ 29.978777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.979198] [ 29.979337] Freed by task 19: [ 29.979585] kasan_save_stack+0x22/0x50 [ 29.979930] kasan_set_track+0x25/0x30 [ 29.980269] kasan_save_free_info+0x2b/0x50 [ 29.980657] __kasan_slab_free+0x10a/0x190 [ 29.980992] kmem_cache_free+0x10d/0x4d0 [ 29.981321] rcu_core+0x8c8/0x2860 [ 29.981599] __do_softirq+0x1b7/0x7d4 [ 29.981910] [ 29.982053] Last potentially related work creation: [ 29.982431] kasan_save_stack+0x22/0x50 [ 29.982755] __kasan_record_aux_stack+0x8e/0xa0 [ 29.983128] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.983541] remove_vma+0x139/0x170 [ 29.983830] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.984181] do_vmi_munmap+0x1f1/0x2b0 [ 29.984523] __vm_munmap+0x138/0x3a0 [ 29.984848] __x64_sys_munmap+0x59/0x80 [ 29.985188] do_syscall_64+0x3f/0x90 [ 29.985521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.985960] [ 29.986115] The buggy address belongs to the object at ffff88801699cbc8 [ 29.986115] which belongs to the cache vm_area_struct of size 168 [ 29.987070] The buggy address is located 88 bytes inside of [ 29.987070] freed 168-byte region [ffff88801699cbc8, ffff88801699cc70) [ 29.987961] [ 29.988099] The buggy address belongs to the physical page: [ 29.988549] page:00000000578b3a46 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1699c [ 29.989251] memcg:ffff88801a06ef01 [ 29.989521] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.989927] page_type: 0xffffffff() [ 29.990221] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.990851] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a06ef01 [ 29.991454] page dumped because: kasan: bad access detected [ 29.991897] [ 29.992049] Memory state around the buggy address: [ 29.992442] ffff88801699cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.992970] ffff88801699cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.993520] >ffff88801699cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.994059] ^ [ 29.994398] ffff88801699cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.994937] ffff88801699cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.995470] ================================================================== [ 29.996154] Disabling lock debugging due to kernel taint [ 31.364533] BUG: Bad rss-counter state mm:0000000064dc78c0 type:MM_FILEPAGES val:33 [ 31.365565] BUG: Bad rss-counter state mm:0000000064dc78c0 type:MM_ANONPAGES val:22 [ 31.734732] BUG: Bad rss-counter state mm:000000005579ff2f type:MM_FILEPAGES val:33 [ 31.735443] BUG: Bad rss-counter state mm:000000005579ff2f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54732' (ECDSA) to the list of known hosts. 2023/06/21 09:34:43 fuzzer started 2023/06/21 09:34:43 dialing manager at localhost:36067 2023/06/21 09:34:43 checking machine... 2023/06/21 09:34:43 checking revisions... [ 32.312167] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:34:43 testing simple program... [ 32.342046] cgroup: Unknown subsys name 'net' [ 32.394941] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:34:43 Registers: info registers vcpu 0 RAX=000000000000016d RBX=00007fec6b43e6a0 RCX=00000000000007b2 RDX=0000000000000003 RSI=0000000000000002 RDI=00000000000086b3 RBP=051eb851eb851eb8 RSP=00007fec6b43e618 R8 =0000000000004c49 R9 =0000563493bbb490 R10=a3d70a3d70a3d70b R11=2ce33e6c02ce33e7 R12=8f5c28f5c28f5c29 R13=0000000000001fa0 R14=00007fec64000ba0 R15=0000000000000003 RIP=00007fec6b88cc94 RFL=00000212 [----A--] 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 00007fec6b442700 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=00007f6988eed650 CR3=000000001652e000 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=ffffffffffffffffffffffffff000000 XMM01=00000000000000003043545500435455 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033343a3433 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303235 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=1ffff11001c719db RBX=ffff88800e38cea8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e38ced8 RBP=ffff888016463600 RSP=ffff888008e37c68 R8 =0000000000000001 R9 =ffffed10011c6f81 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888016463600 R14=ffffffff81165022 R15=ffff88800ed88580 RIP=ffffffff818464ec 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=00007ff170869350 CR3=000000000f11c000 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=34f531089cb1288fda42941edb3a0aa2 XMM02=000000000011b2d0eff9b2d0a8fce9cb XMM03=000000000011b3a02c67c8bc2e329bc3 XMM04=c9b178b0fbd06a0c00000000000ae988 XMM05=dfcdbad4f1609c370000000000131f48 XMM06=806171799158d9670000000000131dd0 XMM07=e042d86d42eb936e00000000001223a0 XMM08=db9d9ff187c0de5c000000000011b3a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000