[ 43.887199] BUG: Bad rss-counter state mm:00000000c873cab1 type:MM_FILEPAGES val:33 [ 43.888475] BUG: Bad rss-counter state mm:00000000c873cab1 type:MM_ANONPAGES val:22 [ 44.048440] ================================================================== [ 44.049503] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.050614] Read of size 8 at addr ffff88800dfc7968 by task sshd/219 [ 44.051561] [ 44.051781] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.052650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.053637] Call Trace: [ 44.053965] [ 44.054247] dump_stack_lvl+0x91/0xf0 [ 44.054744] print_report+0xcc/0x620 [ 44.055227] ? __virt_addr_valid+0x102/0x340 [ 44.055770] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.056384] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.056994] kasan_report+0xbe/0xf0 [ 44.057464] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.058079] vma_interval_tree_remove+0xc75/0xec0 [ 44.058684] vma_prepare+0xc54/0x11a0 [ 44.059166] __split_vma+0x5af/0x950 [ 44.059641] ? __pfx___split_vma+0x10/0x10 [ 44.060175] ? find_held_lock+0x2c/0x110 [ 44.060696] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.061258] ? lock_is_held_type+0x9f/0x120 [ 44.061795] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.062408] ? mtree_range_walk+0x632/0x900 [ 44.062977] ? mas_walk+0x5c7/0x7c0 [ 44.063451] do_vmi_munmap+0x1f1/0x2b0 [ 44.063943] mmap_region+0x1f9/0x2660 [ 44.064420] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.064933] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.065644] ? __pfx_lock_acquire+0x10/0x10 [ 44.066171] ? __pfx_mmap_region+0x10/0x10 [ 44.066715] ? security_mmap_addr+0x7d/0xa0 [ 44.067240] ? get_unmapped_area+0x1f5/0x3f0 [ 44.067788] do_mmap+0x854/0xf00 [ 44.068225] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.068721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.069282] ksys_mmap_pgoff+0x3af/0x500 [ 44.069794] do_syscall_64+0x3f/0x90 [ 44.070269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.070922] RIP: 0033:0x7fd952179d82 [ 44.071384] 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 [ 44.073507] RSP: 002b:00007ffc76e79ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.074416] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd952179d82 [ 44.075300] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9515b3000 [ 44.076146] RBP: 00007fd9515b3000 R08: 0000000000000009 R09: 0000000000001000 [ 44.077009] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6cdb5aec0 [ 44.077876] R13: 00007ffc76e79ee0 R14: 00007ffc76e79f10 R15: 00007ffc76e7a270 [ 44.078754] [ 44.079053] [ 44.079264] Allocated by task 212: [ 44.079694] kasan_save_stack+0x22/0x50 [ 44.080205] kasan_set_track+0x25/0x30 [ 44.080701] __kasan_slab_alloc+0x59/0x70 [ 44.081229] kmem_cache_alloc+0x16b/0x370 [ 44.081750] vm_area_dup+0x20/0x160 [ 44.082214] __split_vma+0x170/0x950 [ 44.082686] split_vma+0xc6/0x110 [ 44.083126] mprotect_fixup+0x8d2/0xb30 [ 44.083635] do_mprotect_pkey+0x87e/0xd40 [ 44.084167] __x64_sys_mprotect+0x78/0xc0 [ 44.084682] do_syscall_64+0x3f/0x90 [ 44.085151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.085792] [ 44.086006] Freed by task 212: [ 44.086399] kasan_save_stack+0x22/0x50 [ 44.086920] kasan_set_track+0x25/0x30 [ 44.087420] kasan_save_free_info+0x2b/0x50 [ 44.087946] __kasan_slab_free+0x10a/0x190 [ 44.088481] kmem_cache_free+0x10d/0x4d0 [ 44.088986] rcu_core+0x8c8/0x2860 [ 44.089428] __do_softirq+0x1b7/0x7d4 [ 44.089901] [ 44.090118] Last potentially related work creation: [ 44.090708] kasan_save_stack+0x22/0x50 [ 44.091207] __kasan_record_aux_stack+0x8e/0xa0 [ 44.091782] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.092417] remove_vma+0x139/0x170 [ 44.092872] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.093426] do_vmi_munmap+0x1f1/0x2b0 [ 44.093908] __vm_munmap+0x138/0x3a0 [ 44.094380] __x64_sys_munmap+0x59/0x80 [ 44.094890] do_syscall_64+0x3f/0x90 [ 44.095366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.096008] [ 44.096220] The buggy address belongs to the object at ffff88800dfc7910 [ 44.096220] which belongs to the cache vm_area_struct of size 168 [ 44.097701] The buggy address is located 88 bytes inside of [ 44.097701] freed 168-byte region [ffff88800dfc7910, ffff88800dfc79b8) [ 44.099117] [ 44.099340] The buggy address belongs to the physical page: [ 44.099992] page:000000006cd279fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfc7 [ 44.101091] memcg:ffff88800dd22301 [ 44.101521] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.102166] page_type: 0xffffffff() [ 44.102622] raw: 0100000000000200 ffff88800879fc80 ffffea000037f380 dead000000000002 [ 44.103554] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd22301 [ 44.104457] page dumped because: kasan: bad access detected [ 44.105113] [ 44.105329] Memory state around the buggy address: [ 44.105898] ffff88800dfc7800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 44.106774] ffff88800dfc7880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 44.107628] >ffff88800dfc7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.108480] ^ [ 44.109265] ffff88800dfc7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 44.110117] ffff88800dfc7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.110979] ================================================================== [ 44.111950] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 46.093787] BUG: Bad rss-counter state mm:00000000fd7fa310 type:MM_FILEPAGES val:33 [ 46.094516] BUG: Bad rss-counter state mm:00000000fd7fa310 type:MM_ANONPAGES val:22 [ 46.482061] BUG: Bad rss-counter state mm:00000000768d4185 type:MM_FILEPAGES val:33 [ 46.483443] BUG: Bad rss-counter state mm:00000000768d4185 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45181' (ECDSA) to the list of known hosts. 2023/06/20 04:37:04 fuzzer started 2023/06/20 04:37:04 dialing manager at localhost:44161 2023/06/20 04:37:04 checking machine... 2023/06/20 04:37:04 checking revisions... [ 47.269478] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:37:04 testing simple program... [ 47.317252] cgroup: Unknown subsys name 'net' [ 47.354307] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:36:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801a427f08 RCX=0000000000000001 RDX=1ffff11003484ee3 RSI=ffff88801a427ed8 RDI=ffff88801a427718 RBP=ffff88801a420000 RSP=ffff88801a427698 R8 =0000000000000001 R9 =ffff88801a427748 R10=0000000000038001 R11=000000000008aa86 R12=ffff88801a427768 R13=ffff88801a427750 R14=ffff88801a427ed8 R15=ffff88801a427708 RIP=ffffffff81131cac 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 00007f1a364e7900 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=00007f1a36a9e618 CR3=000000000e16e000 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=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=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff864b4f38 RDX=0000000000000008 RSI=ffff88806cf09fe0 RDI=ffff88806cf09a50 RBP=ffff88806cf09aa8 RSP=ffff88806cf099d8 R8 =ffffffff864b4f3c R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09fe8 R15=ffff88806cf09a50 RIP=ffffffff811303fa 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 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=00007f0c4b90efb0 CR3=000000000c6b2000 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=719cf1e6a16324bb224cb241b8551e31 XMM02=000000000011e0b8eff9b2d0a8fce9cb XMM03=000000000011e1882c67c8bc2e329bc3 XMM04=fbd37e6d898bb37b00000000000ae988 XMM05=dfcdbad4f1609c370000000000133b90 XMM06=fc7db5e599d30e420000000000132d68 XMM07=e042d86d42eb936e00000000001245d0 XMM08=5f74da0d9f35a326000000000011e188 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000