[ 26.223676] BUG: Bad rss-counter state mm:000000003535c88b type:MM_FILEPAGES val:33 [ 26.224759] BUG: Bad rss-counter state mm:000000003535c88b type:MM_ANONPAGES val:22 [ 26.382561] ================================================================== [ 26.383619] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.384733] Read of size 8 at addr ffff88800f2fed08 by task sshd/218 [ 26.385838] [ 26.386059] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.386907] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.387897] Call Trace: [ 26.388218] [ 26.388498] dump_stack_lvl+0x91/0xf0 [ 26.388983] print_report+0xcc/0x620 [ 26.389478] ? __virt_addr_valid+0x102/0x340 [ 26.390024] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.390637] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.391247] kasan_report+0xbe/0xf0 [ 26.391727] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.392361] vma_interval_tree_remove+0xc75/0xec0 [ 26.392965] vma_prepare+0xc54/0x11a0 [ 26.393454] __split_vma+0x5af/0x950 [ 26.393926] ? __pfx___split_vma+0x10/0x10 [ 26.394455] ? find_held_lock+0x2c/0x110 [ 26.394982] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.395550] ? lock_is_held_type+0x9f/0x120 [ 26.396086] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.396694] ? mtree_range_walk+0x632/0x900 [ 26.397265] ? mas_walk+0x5c7/0x7c0 [ 26.397738] do_vmi_munmap+0x1f1/0x2b0 [ 26.398230] mmap_region+0x1f9/0x2660 [ 26.398713] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.399219] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.399960] ? __pfx_lock_acquire+0x10/0x10 [ 26.400510] ? __pfx_mmap_region+0x10/0x10 [ 26.401052] ? security_mmap_addr+0x7d/0xa0 [ 26.401583] ? get_unmapped_area+0x1f5/0x3f0 [ 26.402131] do_mmap+0x854/0xf00 [ 26.402575] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.403070] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.403632] ksys_mmap_pgoff+0x3af/0x500 [ 26.404136] do_syscall_64+0x3f/0x90 [ 26.404620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.405271] RIP: 0033:0x7fd2474edd82 [ 26.405724] 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 [ 26.407854] RSP: 002b:00007ffcbcd3ece8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.408751] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2474edd82 [ 26.409627] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd246927000 [ 26.410470] RBP: 00007fd246927000 R08: 0000000000000009 R09: 0000000000001000 [ 26.411324] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559fa9ee4ec0 [ 26.412164] R13: 00007ffcbcd3ed00 R14: 00007ffcbcd3ed30 R15: 00007ffcbcd3f090 [ 26.413009] [ 26.413313] [ 26.413529] Allocated by task 211: [ 26.413957] kasan_save_stack+0x22/0x50 [ 26.414463] kasan_set_track+0x25/0x30 [ 26.414961] __kasan_slab_alloc+0x59/0x70 [ 26.415484] kmem_cache_alloc+0x16b/0x370 [ 26.415997] vm_area_dup+0x20/0x160 [ 26.416451] __split_vma+0x170/0x950 [ 26.416913] split_vma+0xc6/0x110 [ 26.417352] mprotect_fixup+0x8d2/0xb30 [ 26.417853] do_mprotect_pkey+0x87e/0xd40 [ 26.418374] __x64_sys_mprotect+0x78/0xc0 [ 26.418892] do_syscall_64+0x3f/0x90 [ 26.419366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.420108] [ 26.420388] Freed by task 211: [ 26.420857] kasan_save_stack+0x22/0x50 [ 26.421404] kasan_set_track+0x25/0x30 [ 26.421927] kasan_save_free_info+0x2b/0x50 [ 26.422461] __kasan_slab_free+0x10a/0x190 [ 26.423008] kmem_cache_free+0x10d/0x4d0 [ 26.423519] rcu_core+0x8c8/0x2860 [ 26.423977] __do_softirq+0x1b7/0x7d4 [ 26.424453] [ 26.424669] Last potentially related work creation: [ 26.425284] kasan_save_stack+0x22/0x50 [ 26.425808] __kasan_record_aux_stack+0x8e/0xa0 [ 26.426474] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.427146] remove_vma+0x139/0x170 [ 26.427601] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.428200] do_vmi_munmap+0x1f1/0x2b0 [ 26.428688] __vm_munmap+0x138/0x3a0 [ 26.429172] __x64_sys_munmap+0x59/0x80 [ 26.429673] do_syscall_64+0x3f/0x90 [ 26.430142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.430790] [ 26.431004] The buggy address belongs to the object at ffff88800f2fecb0 [ 26.431004] which belongs to the cache vm_area_struct of size 168 [ 26.432469] The buggy address is located 88 bytes inside of [ 26.432469] freed 168-byte region [ffff88800f2fecb0, ffff88800f2fed58) [ 26.433874] [ 26.434092] The buggy address belongs to the physical page: [ 26.434742] page:00000000722c99a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2fe [ 26.435821] memcg:ffff88800ed32c01 [ 26.436243] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.436941] page_type: 0xffffffff() [ 26.437405] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 26.438319] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed32c01 [ 26.439222] page dumped because: kasan: bad access detected [ 26.439886] [ 26.440100] Memory state around the buggy address: [ 26.440684] ffff88800f2fec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 26.441558] ffff88800f2fec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 26.442405] >ffff88800f2fed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 26.443250] ^ [ 26.443687] ffff88800f2fed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.444544] ffff88800f2fee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 26.445402] ================================================================== [ 26.446324] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.966171] BUG: Bad rss-counter state mm:00000000e9daf1ef type:MM_FILEPAGES val:33 [ 28.967356] BUG: Bad rss-counter state mm:00000000e9daf1ef type:MM_ANONPAGES val:22 [ 29.413921] BUG: Bad rss-counter state mm:000000008377e03a type:MM_FILEPAGES val:33 [ 29.414903] BUG: Bad rss-counter state mm:000000008377e03a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64667' (ECDSA) to the list of known hosts. 2023/06/19 22:24:35 fuzzer started 2023/06/19 22:24:35 dialing manager at localhost:44161 2023/06/19 22:24:35 checking machine... 2023/06/19 22:24:35 checking revisions... [ 30.052940] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:24:36 testing simple program... [ 30.096319] cgroup: Unknown subsys name 'net' [ 30.148653] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:24:33 Registers: info registers vcpu 0 RAX=ffffffff818dccf6 RBX=ffffffff85e0ac04 RCX=ffffffff818dcc0e RDX=0000000000000000 RSI=ffffffff8614c80e RDI=ffffffff85e0ac00 RBP=ffffffff85e0ac00 RSP=ffff888015af77b8 R8 =ffffffff8614c80e R9 =ffff888015af78b0 R10=0000000000038001 R11=000000000002460b R12=ffffffff85e0ac00 R13=ffffffff85e0ac00 R14=ffffffff85e0ac00 R15=dffffc0000000000 RIP=ffffffff8112fc9f 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 00007fa357bdf900 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=00007fa358196618 CR3=000000001a1bc000 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=00007f3e309e3350 CR3=000000000d694000 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=e1a7778d6cf2bcbb2042cc48d5313f98 XMM02=2c67c8bc2e329bc3000000000011d218 XMM03=fb795ef6d65770560000000000123c60 XMM04=abe5db99664380bb00000000000ae988 XMM05=751b9502027dc0b90000000000133820 XMM06=bdf2e299e47b49d500000000001336a8 XMM07=e042d86d42eb936e0000000000123f38 XMM08=3bbc909bb4c62ed1000000000011d278 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000