syzkaller login: [ 47.664177] BUG: Bad rss-counter state mm:00000000628b3f25 type:MM_FILEPAGES val:33 [ 47.665459] BUG: Bad rss-counter state mm:00000000628b3f25 type:MM_ANONPAGES val:22 [ 47.837410] ================================================================== [ 47.838408] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.839453] Read of size 8 at addr ffff88800ee64a50 by task sshd/222 [ 47.840400] [ 47.840639] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.841588] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.842654] Call Trace: [ 47.843002] [ 47.843342] dump_stack_lvl+0x91/0xf0 [ 47.843885] print_report+0xcc/0x620 [ 47.844415] ? __virt_addr_valid+0x102/0x340 [ 47.845020] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.845700] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.846380] kasan_report+0xbe/0xf0 [ 47.846912] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.847629] vma_interval_tree_remove+0xc75/0xec0 [ 47.848307] vma_prepare+0xc54/0x11a0 [ 47.848850] __split_vma+0x5af/0x950 [ 47.849390] ? __pfx___split_vma+0x10/0x10 [ 47.849995] ? find_held_lock+0x2c/0x110 [ 47.850588] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.851238] ? lock_is_held_type+0x9f/0x120 [ 47.851850] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.852541] ? mtree_range_walk+0x632/0x900 [ 47.853157] ? mas_walk+0x5c7/0x7c0 [ 47.853696] do_vmi_munmap+0x1f1/0x2b0 [ 47.854248] mmap_region+0x1f9/0x2660 [ 47.854798] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.855402] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.856213] ? __pfx_lock_acquire+0x10/0x10 [ 47.856824] ? __pfx_mmap_region+0x10/0x10 [ 47.857429] ? security_mmap_addr+0x7d/0xa0 [ 47.858033] ? get_unmapped_area+0x1f5/0x3f0 [ 47.858654] do_mmap+0x854/0xf00 [ 47.859146] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.859713] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.860349] ksys_mmap_pgoff+0x3af/0x500 [ 47.860921] do_syscall_64+0x3f/0x90 [ 47.861461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.862184] RIP: 0033:0x7f71ab40fd82 [ 47.862699] 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 [ 47.865099] RSP: 002b:00007ffddecdb978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.866122] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f71ab40fd82 [ 47.867081] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f71aa849000 [ 47.868053] RBP: 00007f71aa849000 R08: 0000000000000009 R09: 0000000000001000 [ 47.869006] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb013f9f70 [ 47.869961] R13: 00007ffddecdb990 R14: 00007ffddecdb9c0 R15: 00007ffddecdbd20 [ 47.870922] [ 47.871256] [ 47.871495] Allocated by task 215: [ 47.871971] kasan_save_stack+0x22/0x50 [ 47.872534] kasan_set_track+0x25/0x30 [ 47.873082] __kasan_slab_alloc+0x59/0x70 [ 47.873671] kmem_cache_alloc+0x16b/0x370 [ 47.874252] vm_area_dup+0x20/0x160 [ 47.874762] __split_vma+0x170/0x950 [ 47.875310] split_vma+0xc6/0x110 [ 47.875801] mprotect_fixup+0x8d2/0xb30 [ 47.876357] do_mprotect_pkey+0x87e/0xd40 [ 47.876940] __x64_sys_mprotect+0x78/0xc0 [ 47.877523] do_syscall_64+0x3f/0x90 [ 47.878049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.878770] [ 47.879009] Freed by task 215: [ 47.879451] kasan_save_stack+0x22/0x50 [ 47.880018] kasan_set_track+0x25/0x30 [ 47.880571] kasan_save_free_info+0x2b/0x50 [ 47.881235] __kasan_slab_free+0x10a/0x190 [ 47.881834] kmem_cache_free+0x10d/0x4d0 [ 47.882399] rcu_core+0x8c8/0x2860 [ 47.882903] __do_softirq+0x1b7/0x7d4 [ 47.883448] [ 47.883687] Last potentially related work creation: [ 47.884336] kasan_save_stack+0x22/0x50 [ 47.884892] __kasan_record_aux_stack+0x8e/0xa0 [ 47.885524] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.886238] remove_vma+0x139/0x170 [ 47.886739] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.887370] do_vmi_munmap+0x1f1/0x2b0 [ 47.887912] __vm_munmap+0x138/0x3a0 [ 47.888430] __x64_sys_munmap+0x59/0x80 [ 47.888979] do_syscall_64+0x3f/0x90 [ 47.889504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.890212] [ 47.890451] The buggy address belongs to the object at ffff88800ee649f8 [ 47.890451] which belongs to the cache vm_area_struct of size 168 [ 47.892074] The buggy address is located 88 bytes inside of [ 47.892074] freed 168-byte region [ffff88800ee649f8, ffff88800ee64aa0) [ 47.893631] [ 47.893871] The buggy address belongs to the physical page: [ 47.894600] page:00000000c50da753 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee64 [ 47.895814] memcg:ffff88800ec31101 [ 47.896286] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.897004] page_type: 0xffffffff() [ 47.897503] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.898633] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec31101 [ 47.899647] page dumped because: kasan: bad access detected [ 47.900382] [ 47.900627] Memory state around the buggy address: [ 47.901275] ffff88800ee64900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.902226] ffff88800ee64980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 47.903196] >ffff88800ee64a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.904147] ^ [ 47.904936] ffff88800ee64a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 47.905883] ffff88800ee64b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.906827] ================================================================== [ 47.907985] Disabling lock debugging due to kernel taint [ 50.122633] BUG: Bad rss-counter state mm:0000000004ac928d type:MM_FILEPAGES val:33 [ 50.123615] BUG: Bad rss-counter state mm:0000000004ac928d type:MM_ANONPAGES val:22 [ 50.716697] BUG: Bad rss-counter state mm:000000003e74c666 type:MM_FILEPAGES val:33 [ 50.717848] BUG: Bad rss-counter state mm:000000003e74c666 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32044' (ECDSA) to the list of known hosts. 2023/06/20 02:30:00 fuzzer started 2023/06/20 02:30:00 dialing manager at localhost:44161 2023/06/20 02:30:00 checking machine... 2023/06/20 02:30:00 checking revisions... [ 51.400692] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:30:01 testing simple program... [ 51.456067] cgroup: Unknown subsys name 'net' [ 51.505332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:29:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800cd6e260 RCX=ffffffff81378270 RDX=1ffff110019adc64 RSI=ffffffff813782a8 RDI=ffff88800844f780 RBP=ffff88806ce09e58 RSP=ffff88806ce09e30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88800844f780 R13=ffff88808cd6e260 R14=ffff88806ce35000 R15=ffff88800cd6e2e0 RIP=ffffffff81809b10 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 0000000000000000 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=00007ffdcee3bbe8 CR3=0000000005482000 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=00007ff72afc351000005593137d5790 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff818c86c0 RDX=0000000000008c86 RSI=0000000000008c86 RDI=ffffffff8650add8 RBP=ffff88801585f980 RSP=ffff88801585f8b8 R8 =0000000000000000 R9 =ffff88801585f968 R10=0000000000038001 R11=0000000000020c55 R12=ffff88801585f988 R13=ffff88801585f970 R14=ffff88801585f969 R15=ffff88801585f928 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007f66a37c8900 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=00007f66a3d7d650 CR3=000000000f3e4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000