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zebra: fix dplane_ctx_iptable use-after-free #14862
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Fix a crash because a use-after-free. > ================================================================= > ==1249835==ERROR: AddressSanitizer: heap-use-after-free on address 0x604000074210 at pc 0x7fa1b42a652c bp 0x7ffc477a2aa0 sp 0x7ffc477a2a98 > READ of size 8 at 0x604000074210 thread T0 > #0 0x7fa1b42a652b in list_delete_all_node git/frr/lib/linklist.c:299:20 > #1 0x7fa1b42a683f in list_delete git/frr/lib/linklist.c:312:2 > #2 0x5ee515 in dplane_ctx_free_internal git/frr/zebra/zebra_dplane.c:858:4 > #3 0x5ee59c in dplane_ctx_free git/frr/zebra/zebra_dplane.c:884:2 > FRRouting#4 0x5ee544 in dplane_ctx_fini git/frr/zebra/zebra_dplane.c:905:2 > FRRouting#5 0x7045c0 in rib_process_dplane_results git/frr/zebra/zebra_rib.c:4928:4 > FRRouting#6 0x7fa1b4434fb2 in event_call git/frr/lib/event.c:1970:2 > FRRouting#7 0x7fa1b42a0ccf in frr_run git/frr/lib/libfrr.c:1213:3 > FRRouting#8 0x556808 in main git/frr/zebra/main.c:488:2 > FRRouting#9 0x7fa1b3d0bd09 in __libc_start_main csu/../csu/libc-start.c:308:16 > FRRouting#10 0x4453e9 in _start (/usr/lib/frr/zebra+0x4453e9) > > 0x604000074210 is located 0 bytes inside of 40-byte region [0x604000074210,0x604000074238) > freed by thread T0 here: > #0 0x4bf1dd in free (/usr/lib/frr/zebra+0x4bf1dd) > #1 0x7fa1b42df0c0 in qfree git/frr/lib/memory.c:130:2 > #2 0x7fa1b42a68ce in list_free_internal git/frr/lib/linklist.c:24:2 > #3 0x7fa1b42a6870 in list_delete git/frr/lib/linklist.c:313:2 > FRRouting#4 0x5ee515 in dplane_ctx_free_internal git/frr/zebra/zebra_dplane.c:858:4 > FRRouting#5 0x5ee59c in dplane_ctx_free git/frr/zebra/zebra_dplane.c:884:2 > FRRouting#6 0x5ee544 in dplane_ctx_fini git/frr/zebra/zebra_dplane.c:905:2 > FRRouting#7 0x7045c0 in rib_process_dplane_results git/frr/zebra/zebra_rib.c:4928:4 > FRRouting#8 0x7fa1b4434fb2 in event_call git/frr/lib/event.c:1970:2 > FRRouting#9 0x7fa1b42a0ccf in frr_run git/frr/lib/libfrr.c:1213:3 > FRRouting#10 0x556808 in main git/frr/zebra/main.c:488:2 > FRRouting#11 0x7fa1b3d0bd09 in __libc_start_main csu/../csu/libc-start.c:308:16 > > previously allocated by thread T0 here: > #0 0x4bf5d2 in calloc (/usr/lib/frr/zebra+0x4bf5d2) > #1 0x7fa1b42dee18 in qcalloc git/frr/lib/memory.c:105:27 > #2 0x7fa1b42a3784 in list_new git/frr/lib/linklist.c:18:9 > #3 0x6d165f in pbr_iptable_alloc_intern git/frr/zebra/zebra_pbr.c:1015:29 > FRRouting#4 0x7fa1b426ad1f in hash_get git/frr/lib/hash.c:147:13 > FRRouting#5 0x6d15f2 in zebra_pbr_add_iptable git/frr/zebra/zebra_pbr.c:1030:13 > FRRouting#6 0x5db2a3 in zread_iptable git/frr/zebra/zapi_msg.c:3759:3 > FRRouting#7 0x5e365d in zserv_handle_commands git/frr/zebra/zapi_msg.c:4039:3 > FRRouting#8 0x7e09fc in zserv_process_messages git/frr/zebra/zserv.c:520:3 > FRRouting#9 0x7fa1b4434fb2 in event_call git/frr/lib/event.c:1970:2 > FRRouting#10 0x7fa1b42a0ccf in frr_run git/frr/lib/libfrr.c:1213:3 > FRRouting#11 0x556808 in main git/frr/zebra/main.c:488:2 > FRRouting#12 0x7fa1b3d0bd09 in __libc_start_main csu/../csu/libc-start.c:308:16 Fixes: 1cc3806 ("zebra: Actually free all memory associated ctx->u.iptable.interface_name_list") Signed-off-by: Louis Scalbert <[email protected]>
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Looks good, thanks
https://github.com/Mergifyio backport stable/9.1 |
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https://github.com/Mergifyio backport dev/9.1 |
https://github.com/Mergifyio backport stable/9.0 |
❌ Command disallowed due to command restrictions in the Mergify configuration.
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❌ Command disallowed due to command restrictions in the Mergify configuration.
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https://github.com/Mergifyio backport stable/8.5 |
❌ Command disallowed due to command restrictions in the Mergify configuration.
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https://github.com/Mergifyio backport stable/9.1 |
https://github.com/Mergifyio backport stable/9.0 |
https://github.com/Mergifyio backport stable/8.5 |
✅ Backports have been created
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✅ Backports have been created
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✅ Backports have been created
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zebra: fix dplane_ctx_iptable use-after-free (backport #14862)
zebra: fix dplane_ctx_iptable use-after-free (backport #14862)
zebra: fix dplane_ctx_iptable use-after-free (backport #14862)
Fix a crash because a use-after-free.
Fixes: 1cc3806 ("zebra: Actually free all memory associated ctx->u.iptable.interface_name_list")