syzkaller login: [ 44.257856] BUG: Bad rss-counter state mm:00000000dc79dbf6 type:MM_FILEPAGES val:33 [ 44.258860] BUG: Bad rss-counter state mm:00000000dc79dbf6 type:MM_ANONPAGES val:22 [ 44.423859] ================================================================== [ 44.424954] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.426180] Read of size 8 at addr ffff8880162766b0 by task sshd/220 [ 44.427041] [ 44.427257] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.428148] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.429131] Call Trace: [ 44.429461] [ 44.429758] dump_stack_lvl+0x91/0xf0 [ 44.430255] print_report+0xcc/0x620 [ 44.430765] ? __virt_addr_valid+0x102/0x340 [ 44.431335] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.431986] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.432641] kasan_report+0xbe/0xf0 [ 44.433124] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.433889] vma_interval_tree_remove+0xc75/0xec0 [ 44.434725] vma_prepare+0xc54/0x11a0 [ 44.435255] __split_vma+0x5af/0x950 [ 44.435765] ? __pfx___split_vma+0x10/0x10 [ 44.436319] ? find_held_lock+0x2c/0x110 [ 44.436888] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.437494] ? lock_is_held_type+0x9f/0x120 [ 44.438059] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.438702] ? mtree_range_walk+0x632/0x900 [ 44.439290] ? mas_walk+0x5c7/0x7c0 [ 44.439836] do_vmi_munmap+0x1f1/0x2b0 [ 44.440353] mmap_region+0x1f9/0x2660 [ 44.441021] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.441709] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.442482] ? __pfx_lock_acquire+0x10/0x10 [ 44.443063] ? __pfx_mmap_region+0x10/0x10 [ 44.443640] ? security_mmap_addr+0x7d/0xa0 [ 44.444194] ? get_unmapped_area+0x1f5/0x3f0 [ 44.444773] do_mmap+0x854/0xf00 [ 44.445225] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.445754] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.446334] ksys_mmap_pgoff+0x3af/0x500 [ 44.446878] do_syscall_64+0x3f/0x90 [ 44.447399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.448090] RIP: 0033:0x7f9419f4ed82 [ 44.448584] 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 [ 44.450808] RSP: 002b:00007ffd2d781fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.451791] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9419f4ed82 [ 44.452694] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9419388000 [ 44.453590] RBP: 00007f9419388000 R08: 0000000000000009 R09: 0000000000001000 [ 44.454487] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d89e9a7ec0 [ 44.455402] R13: 00007ffd2d782000 R14: 00007ffd2d782030 R15: 00007ffd2d782390 [ 44.456313] [ 44.456634] [ 44.456860] Allocated by task 213: [ 44.457303] kasan_save_stack+0x22/0x50 [ 44.457837] kasan_set_track+0x25/0x30 [ 44.458360] __kasan_slab_alloc+0x59/0x70 [ 44.458944] kmem_cache_alloc+0x16b/0x370 [ 44.459491] vm_area_dup+0x20/0x160 [ 44.459965] __split_vma+0x170/0x950 [ 44.460471] split_vma+0xc6/0x110 [ 44.460936] mprotect_fixup+0x8d2/0xb30 [ 44.461469] do_mprotect_pkey+0x87e/0xd40 [ 44.462011] __x64_sys_mprotect+0x78/0xc0 [ 44.462571] do_syscall_64+0x3f/0x90 [ 44.463084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.463757] [ 44.463982] Freed by task 210: [ 44.464399] kasan_save_stack+0x22/0x50 [ 44.464927] kasan_set_track+0x25/0x30 [ 44.465473] kasan_save_free_info+0x2b/0x50 [ 44.466028] __kasan_slab_free+0x10a/0x190 [ 44.466600] kmem_cache_free+0x10d/0x4d0 [ 44.467152] rcu_core+0x8c8/0x2860 [ 44.467619] __do_softirq+0x1b7/0x7d4 [ 44.468112] [ 44.468330] Last potentially related work creation: [ 44.468946] kasan_save_stack+0x22/0x50 [ 44.469485] __kasan_record_aux_stack+0x8e/0xa0 [ 44.470088] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.470778] remove_vma+0x139/0x170 [ 44.471267] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.471849] do_vmi_munmap+0x1f1/0x2b0 [ 44.472350] __vm_munmap+0x138/0x3a0 [ 44.472847] __x64_sys_munmap+0x59/0x80 [ 44.473376] do_syscall_64+0x3f/0x90 [ 44.473880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.474556] [ 44.474781] The buggy address belongs to the object at ffff888016276658 [ 44.474781] which belongs to the cache vm_area_struct of size 168 [ 44.476359] The buggy address is located 88 bytes inside of [ 44.476359] freed 168-byte region [ffff888016276658, ffff888016276700) [ 44.477864] [ 44.478089] The buggy address belongs to the physical page: [ 44.478792] page:00000000c1c24145 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16276 [ 44.479977] memcg:ffff88800cbe8001 [ 44.480433] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.481106] page_type: 0xffffffff() [ 44.481594] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.482562] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbe8001 [ 44.483555] page dumped because: kasan: bad access detected [ 44.484247] [ 44.484489] Memory state around the buggy address: [ 44.485106] ffff888016276580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.486006] ffff888016276600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 44.487121] >ffff888016276680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.488325] ^ [ 44.489144] ffff888016276700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 44.490354] ffff888016276780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 44.491562] ================================================================== [ 44.493248] Disabling lock debugging due to kernel taint [ 46.769646] BUG: Bad rss-counter state mm:00000000fc18a276 type:MM_FILEPAGES val:33 [ 46.770578] BUG: Bad rss-counter state mm:00000000fc18a276 type:MM_ANONPAGES val:22 [ 47.236979] BUG: Bad rss-counter state mm:00000000466ec1e7 type:MM_FILEPAGES val:33 [ 47.238142] BUG: Bad rss-counter state mm:00000000466ec1e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2322' (ECDSA) to the list of known hosts. 2023/06/20 09:54:06 fuzzer started 2023/06/20 09:54:07 dialing manager at localhost:44161 2023/06/20 09:54:07 checking machine... 2023/06/20 09:54:07 checking revisions... [ 47.878004] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:54:07 testing simple program... [ 47.929263] cgroup: Unknown subsys name 'net' [ 47.999428] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:53:53 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff810bd056 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864eab00 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff811307c2 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 00007fea583ab900 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=00007fea58962618 CR3=00000000183b2000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fbe3da976c0 CR3=0000000009642000 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=34353a3930203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383534 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000