Hello, syzbot found the following issue on: HEAD commit: fda5695d692c Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=15d0f600980000 kernel config: https://syzkaller.appspot.com/x/.config?x=95dc1de8407c7270 dashboard link: https://syzkaller.appspot.com/bug?extid=6d3021bf0c4cb4ffac17 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12c834d0980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1776a07c980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/07f3214ff0d9/disk-fda5695d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/70e2e2c864e8/vmlinux-fda5695d.xz kernel image: https://storage.googleapis.com/syzbot-assets/b259942a16dc/Image-fda5695d.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/aade2af8a508/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6d3021bf0c4cb4ffac17@xxxxxxxxxxxxxxxxxxxxxxxxx bcachefs (loop0): mounting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,nojournal_transaction_names bcachefs (loop0): recovering from clean shutdown, journal seq 10 ================================================================== BUG: KASAN: slab-use-after-free in neon_poly1305_do_update arch/arm64/crypto/poly1305-glue.c:107 [inline] BUG: KASAN: slab-use-after-free in neon_poly1305_update+0x2e0/0xb34 arch/arm64/crypto/poly1305-glue.c:119 Read of size 8 at addr ffff0000dd021790 by task syz-executor319/6238 CPU: 0 PID: 6238 Comm: syz-executor319 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x198/0x538 mm/kasan/report.c:488 kasan_report+0xd8/0x138 mm/kasan/report.c:601 kasan_check_range+0x268/0x2a8 mm/kasan/generic.c:189 __asan_memcpy+0x3c/0x84 mm/kasan/shadow.c:105 neon_poly1305_do_update arch/arm64/crypto/poly1305-glue.c:107 [inline] neon_poly1305_update+0x2e0/0xb34 arch/arm64/crypto/poly1305-glue.c:119 crypto_shash_update+0x90/0xa8 crypto/shash.c:70 bch2_checksum+0x690/0x770 fs/bcachefs/checksum.c:228 bch2_btree_node_read_done+0xccc/0x45f0 fs/bcachefs/btree_io.c:1096 btree_node_read_work+0x4e8/0xe9c fs/bcachefs/btree_io.c:1324 bch2_btree_node_read+0x210c/0x28e4 fs/bcachefs/btree_io.c:1709 __bch2_btree_root_read fs/bcachefs/btree_io.c:1748 [inline] bch2_btree_root_read+0x2a8/0x534 fs/bcachefs/btree_io.c:1772 read_btree_roots+0x21c/0x730 fs/bcachefs/recovery.c:457 bch2_fs_recovery+0x2dac/0x4854 fs/bcachefs/recovery.c:785 bch2_fs_start+0x30c/0x53c fs/bcachefs/super.c:1043 bch2_fs_open+0x8b4/0xb64 fs/bcachefs/super.c:2102 bch2_mount+0x558/0xe10 fs/bcachefs/fs.c:1903 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662 vfs_get_tree+0x90/0x288 fs/super.c:1779 do_new_mount+0x278/0x900 fs/namespace.c:3352 path_mount+0x590/0xe04 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3875 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Allocated by task 6093: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:565 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc+0x1dc/0x3c0 mm/slub.c:3852 skb_clone+0x1c8/0x330 net/core/skbuff.c:2063 dev_queue_xmit_nit+0x360/0x9c0 net/core/dev.c:2264 xmit_one net/core/dev.c:3527 [inline] dev_hard_start_xmit+0x12c/0x938 net/core/dev.c:3547 sch_direct_xmit+0x244/0x57c net/sched/sch_generic.c:343 __dev_xmit_skb net/core/dev.c:3760 [inline] __dev_queue_xmit+0x148c/0x33fc net/core/dev.c:4307 dev_queue_xmit include/linux/netdevice.h:3091 [inline] neigh_hh_output include/net/neighbour.h:526 [inline] neigh_output include/net/neighbour.h:540 [inline] ip_finish_output2+0xdd8/0x13b4 net/ipv4/ip_output.c:235 __ip_finish_output+0x1b0/0x458 ip_finish_output+0x44/0x2e4 net/ipv4/ip_output.c:323 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip_output+0x1a8/0x21c net/ipv4/ip_output.c:433 dst_output include/net/dst.h:450 [inline] ip_local_out net/ipv4/ip_output.c:129 [inline] __ip_queue_xmit+0xe10/0x1874 net/ipv4/ip_output.c:535 ip_queue_xmit+0x5c/0x78 net/ipv4/ip_output.c:549 __tcp_transmit_skb+0x1930/0x34a0 net/ipv4/tcp_output.c:1462 tcp_transmit_skb net/ipv4/tcp_output.c:1480 [inline] tcp_write_xmit+0x11c0/0x4bac net/ipv4/tcp_output.c:2792 __tcp_push_pending_frames+0x98/0x228 net/ipv4/tcp_output.c:2977 tcp_push+0x454/0x694 net/ipv4/tcp.c:738 tcp_sendmsg_locked+0x34dc/0x3d90 net/ipv4/tcp.c:1310 tcp_sendmsg+0x40/0x64 net/ipv4/tcp.c:1342 inet_sendmsg+0x15c/0x290 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_write_iter+0x2d8/0x448 net/socket.c:1160 call_write_iter include/linux/fs.h:2110 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x968/0xc3c fs/read_write.c:590 ksys_write+0x15c/0x26c fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:652 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Freed by task 6093: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_free_info+0x54/0x6c mm/kasan/generic.c:579 poison_slab_object+0x124/0x18c mm/kasan/common.c:240 __kasan_slab_free+0x3c/0x70 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kmem_cache_free+0x168/0x3f0 mm/slub.c:4344 kfree_skbmem+0x15c/0x1ec __kfree_skb net/core/skbuff.c:1217 [inline] kfree_skb_reason+0x1cc/0x4a8 net/core/skbuff.c:1252 packet_rcv+0x13c/0x1118 net/packet/af_packet.c:2230 dev_queue_xmit_nit+0x88c/0x9c0 net/core/dev.c:2296 xmit_one net/core/dev.c:3527 [inline] dev_hard_start_xmit+0x12c/0x938 net/core/dev.c:3547 sch_direct_xmit+0x244/0x57c net/sched/sch_generic.c:343 __dev_xmit_skb net/core/dev.c:3760 [inline] __dev_queue_xmit+0x148c/0x33fc net/core/dev.c:4307 dev_queue_xmit include/linux/netdevice.h:3091 [inline] neigh_hh_output include/net/neighbour.h:526 [inline] neigh_output include/net/neighbour.h:540 [inline] ip_finish_output2+0xdd8/0x13b4 net/ipv4/ip_output.c:235 __ip_finish_output+0x1b0/0x458 ip_finish_output+0x44/0x2e4 net/ipv4/ip_output.c:323 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip_output+0x1a8/0x21c net/ipv4/ip_output.c:433 dst_output include/net/dst.h:450 [inline] ip_local_out net/ipv4/ip_output.c:129 [inline] __ip_queue_xmit+0xe10/0x1874 net/ipv4/ip_output.c:535 ip_queue_xmit+0x5c/0x78 net/ipv4/ip_output.c:549 __tcp_transmit_skb+0x1930/0x34a0 net/ipv4/tcp_output.c:1462 tcp_transmit_skb net/ipv4/tcp_output.c:1480 [inline] tcp_write_xmit+0x11c0/0x4bac net/ipv4/tcp_output.c:2792 __tcp_push_pending_frames+0x98/0x228 net/ipv4/tcp_output.c:2977 tcp_push+0x454/0x694 net/ipv4/tcp.c:738 tcp_sendmsg_locked+0x34dc/0x3d90 net/ipv4/tcp.c:1310 tcp_sendmsg+0x40/0x64 net/ipv4/tcp.c:1342 inet_sendmsg+0x15c/0x290 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_write_iter+0x2d8/0x448 net/socket.c:1160 call_write_iter include/linux/fs.h:2110 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x968/0xc3c fs/read_write.c:590 ksys_write+0x15c/0x26c fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:652 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 The buggy address belongs to the object at ffff0000dd021780 which belongs to the cache skbuff_head_cache of size 240 The buggy address is located 16 bytes inside of freed 240-byte region [ffff0000dd021780, ffff0000dd021870) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11d021 flags: 0x5ffc00000000800(slab|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000000800 ffff0000c1bc4780 dead000000000122 0000000000000000 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000dd021680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000dd021700: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc >ffff0000dd021780: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000dd021800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc ffff0000dd021880: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ================================================================== bcachefs (loop0): error validating btree node on loop0 at btree lru level 0/0 u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq a11787a6b9c68820 written 16 min_key POS_MIN durability: 1 ptr: 0:28:0 gen 0 node offset 8/16 bset u64s 49390: checksum error, type chacha20_poly1305_128: got 5e7d73dbe54d11175c32a6907d11332e should be 7ecf2f3506fda339523b45cdbfcbcdbd, shutting down bcachefs (loop0): inconsistency detected - emergency read only at journal seq 10 bcachefs (loop0): flagging btree lru lost data error reading btree root lru l=0: btree_node_read_error, shutting down bcachefs (loop0): bch2_fs_recovery(): error fsck_errors_not_fixed bcachefs (loop0): bch2_fs_start(): error starting filesystem fsck_errors_not_fixed bcachefs (loop0): shutting down bcachefs (loop0): shutdown complete --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
