syzkaller login: [ 40.361172] BUG: Bad rss-counter state mm:00000000f04a440e type:MM_FILEPAGES val:33 [ 40.363478] BUG: Bad rss-counter state mm:00000000f04a440e type:MM_ANONPAGES val:22 [ 40.532943] ================================================================== [ 40.533832] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.534785] Read of size 8 at addr ffff88800c4b8228 by task sshd/219 [ 40.535569] [ 40.535885] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.536751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.537726] Call Trace: [ 40.538100] [ 40.538385] dump_stack_lvl+0x91/0xf0 [ 40.538881] print_report+0xcc/0x620 [ 40.539371] ? __virt_addr_valid+0x102/0x340 [ 40.539925] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.540549] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.541168] kasan_report+0xbe/0xf0 [ 40.541649] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.542299] vma_interval_tree_remove+0xc75/0xec0 [ 40.542916] vma_prepare+0xc54/0x11a0 [ 40.543400] __split_vma+0x5af/0x950 [ 40.543878] ? __pfx___split_vma+0x10/0x10 [ 40.544402] ? find_held_lock+0x2c/0x110 [ 40.544920] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.545487] ? lock_is_held_type+0x9f/0x120 [ 40.546038] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.546646] ? mtree_range_walk+0x632/0x900 [ 40.547197] ? mas_walk+0x5c7/0x7c0 [ 40.547670] do_vmi_munmap+0x1f1/0x2b0 [ 40.548170] mmap_region+0x1f9/0x2660 [ 40.548653] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.549168] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.549901] ? __pfx_lock_acquire+0x10/0x10 [ 40.550451] ? __pfx_mmap_region+0x10/0x10 [ 40.550993] ? security_mmap_addr+0x7d/0xa0 [ 40.551548] ? get_unmapped_area+0x1f5/0x3f0 [ 40.552125] do_mmap+0x854/0xf00 [ 40.552582] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.553102] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.553690] ksys_mmap_pgoff+0x3af/0x500 [ 40.554247] do_syscall_64+0x3f/0x90 [ 40.554743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.555415] RIP: 0033:0x7fd09a80cd82 [ 40.555898] 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 [ 40.558123] RSP: 002b:00007ffd96bbff38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.559065] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd09a80cd82 [ 40.559963] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd099c46000 [ 40.560849] RBP: 00007fd099c46000 R08: 0000000000000009 R09: 0000000000001000 [ 40.561741] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609e497cf70 [ 40.562640] R13: 00007ffd96bbff50 R14: 00007ffd96bbff80 R15: 00007ffd96bc02e0 [ 40.563535] [ 40.563836] [ 40.564062] Allocated by task 212: [ 40.564514] kasan_save_stack+0x22/0x50 [ 40.565039] kasan_set_track+0x25/0x30 [ 40.565551] __kasan_slab_alloc+0x59/0x70 [ 40.566117] kmem_cache_alloc+0x16b/0x370 [ 40.566652] vm_area_dup+0x20/0x160 [ 40.567132] __split_vma+0x170/0x950 [ 40.567609] split_vma+0xc6/0x110 [ 40.568072] mprotect_fixup+0x8d2/0xb30 [ 40.568591] do_mprotect_pkey+0x87e/0xd40 [ 40.569130] __x64_sys_mprotect+0x78/0xc0 [ 40.569680] do_syscall_64+0x3f/0x90 [ 40.570180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.570843] [ 40.571071] Freed by task 212: [ 40.571482] kasan_save_stack+0x22/0x50 [ 40.572005] kasan_set_track+0x25/0x30 [ 40.572522] kasan_save_free_info+0x2b/0x50 [ 40.573087] __kasan_slab_free+0x10a/0x190 [ 40.573641] kmem_cache_free+0x10d/0x4d0 [ 40.574185] rcu_core+0x8c8/0x2860 [ 40.574646] __do_softirq+0x1b7/0x7d4 [ 40.575147] [ 40.575369] Last potentially related work creation: [ 40.575986] kasan_save_stack+0x22/0x50 [ 40.576509] __kasan_record_aux_stack+0x8e/0xa0 [ 40.577099] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.577764] remove_vma+0x139/0x170 [ 40.578254] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.578835] do_vmi_munmap+0x1f1/0x2b0 [ 40.579339] __vm_munmap+0x138/0x3a0 [ 40.579824] __x64_sys_munmap+0x59/0x80 [ 40.580352] do_syscall_64+0x3f/0x90 [ 40.580844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.581509] [ 40.581733] Second to last potentially related work creation: [ 40.582458] kasan_save_stack+0x22/0x50 [ 40.582988] __kasan_record_aux_stack+0x8e/0xa0 [ 40.583593] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.584268] remove_vma+0x139/0x170 [ 40.584738] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.585330] do_vmi_munmap+0x1f1/0x2b0 [ 40.585833] mmap_region+0x1f9/0x2660 [ 40.586353] do_mmap+0x854/0xf00 [ 40.586806] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.587318] ksys_mmap_pgoff+0x3af/0x500 [ 40.587841] do_syscall_64+0x3f/0x90 [ 40.588339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.589000] [ 40.589219] The buggy address belongs to the object at ffff88800c4b81d0 [ 40.589219] which belongs to the cache vm_area_struct of size 168 [ 40.590760] The buggy address is located 88 bytes inside of [ 40.590760] freed 168-byte region [ffff88800c4b81d0, ffff88800c4b8278) [ 40.592224] [ 40.592450] The buggy address belongs to the physical page: [ 40.593139] page:00000000087b1d6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4b8 [ 40.594290] memcg:ffff888013f73201 [ 40.594739] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.595464] page_type: 0xffffffff() [ 40.595935] raw: 0100000000000200 ffff88800879fc80 ffffea0000366180 dead000000000009 [ 40.596894] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f73201 [ 40.597836] page dumped because: kasan: bad access detected [ 40.598552] [ 40.598777] Memory state around the buggy address: [ 40.599390] ffff88800c4b8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.600282] ffff88800c4b8180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.601183] >ffff88800c4b8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.602088] ^ [ 40.602668] ffff88800c4b8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.603568] ffff88800c4b8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.604456] ================================================================== [ 40.605516] Disabling lock debugging due to kernel taint [ 42.642628] BUG: Bad rss-counter state mm:000000005033ce70 type:MM_FILEPAGES val:33 [ 42.643891] BUG: Bad rss-counter state mm:000000005033ce70 type:MM_ANONPAGES val:22 [ 43.059142] BUG: Bad rss-counter state mm:0000000013e910a3 type:MM_FILEPAGES val:33 [ 43.060133] BUG: Bad rss-counter state mm:0000000013e910a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22221' (ECDSA) to the list of known hosts. 2023/06/19 15:19:11 fuzzer started 2023/06/19 15:19:11 dialing manager at localhost:44161 2023/06/19 15:19:11 checking machine... 2023/06/19 15:19:11 checking revisions... [ 43.806834] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:19:11 testing simple program... [ 43.858598] cgroup: Unknown subsys name 'net' [ 43.902617] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:19:09 Registers: info registers vcpu 0 RAX=1ffff11001bb5bdb RBX=ffff88800ddadea8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ddadeb8 RBP=ffffe8ffffc12498 RSP=ffff88800f55fc48 R8 =0000000000000001 R9 =ffffed1001eabf7d R10=0000000000000003 R11=0000000000018faa R12=dffffc0000000000 R13=ffffe8ffffc12338 R14=0000000000000000 R15=0000000000000282 RIP=ffffffff81846337 RFL=00000006 [-----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 00007fb33b35f900 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=0000561cb0f79290 CR3=0000000015f30000 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=00007f891e51e510000055bc97b7f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801476f750 RCX=ffffffff8189b00d RDX=ffff88800cd19b40 RSI=0000000000000040 RDI=0000000000000000 RBP=ffff88801476f600 RSP=ffff88801476f5c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00676f6c7379732f R12=0000000000000040 R13=ffff88801476f770 R14=ffff88801476f788 R15=0000000000000000 RIP=ffffffff814c0388 RFL=00000246 [---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 00007fdf769da900 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=00007fdf75dd8a80 CR3=000000000ccd8000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0f5141dd6670072e00000000000ae988 XMM05=e633beebd13611440000000000137b28 XMM06=4fda316b135da52b0000000000136918 XMM07=fb795ef6d657705600000000001253f0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000